gemma: pkg/mesh/vertex.go annotate

annotate pkg/mesh/vertex.go @ 5736:55892008ec96 default tip

Fixed a bunch of corner cases in WG import.

author	Sascha Wilde <wilde@sha-bang.de>
date	Wed, 29 May 2024 19:02:42 +0200
parents	61eff98a40ae
children

rev	line source
1017 a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	1 // This is Free Software under GNU Affero General Public License v >= 3.0
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	2 // without warranty, see README.md and license for details.
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	3 //
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	4 // SPDX-License-Identifier: AGPL-3.0-or-later
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	5 // License-Filename: LICENSES/AGPL-3.0.txt
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	6 //
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	7 // Copyright (C) 2018 by via donau
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	8 // – Österreichische Wasserstraßen-Gesellschaft mbH
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	9 // Software engineering by Intevation GmbH
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	10 //
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	11 // Author(s):
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 988 diff changeset	13
4827 f4abfd0ee8ad Renamed octree package to mesh as there is no octree any more. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4768 diff changeset	14 package mesh
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	15
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	16 import (
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	17 "bytes"
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	18 "encoding/binary"
2529 45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	19 "fmt"
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	20 "io"
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	21 "math"
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	22 "sort"
2471 63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	23
5490 5f47eeea988d Use own logging package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5428 diff changeset	24 "gemma.intevation.de/gemma/pkg/log"
2471 63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	25 "gemma.intevation.de/gemma/pkg/wkb"
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	26 )
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	27
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	28 type (
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	29 // Point is a 2D point.
2572 7686c7c23506 Morphological differences: Moved some code into octree package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2529 diff changeset	30 Point struct {
7686c7c23506 Morphological differences: Moved some code into octree package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2529 diff changeset	31 X float64
7686c7c23506 Morphological differences: Moved some code into octree package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2529 diff changeset	32 Y float64
7686c7c23506 Morphological differences: Moved some code into octree package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2529 diff changeset	33 }
7686c7c23506 Morphological differences: Moved some code into octree package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2529 diff changeset	34
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	35 // Vertex is a 3D vertex.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	36 Vertex struct {
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	37 X float64
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	38 Y float64
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	39 Z float64
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	40 }
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	41
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	42 // Triangle is a triangle consisting of three vertices.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	43 Triangle [3]Vertex
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	44
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	45 // Line is a line defined by first vertex on that line
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	46 // and the second being the direction.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	47 Line [2]Vertex
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	48
3953 4233570de212 Building octrees: Don't cause havok by building ain overly large tree if the points are not really 3D. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3770 diff changeset	49 // Box is a 3D box.
4233570de212 Building octrees: Don't cause havok by building ain overly large tree if the points are not really 3D. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3770 diff changeset	50 Box [2]Vertex
4233570de212 Building octrees: Don't cause havok by building ain overly large tree if the points are not really 3D. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3770 diff changeset	51
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	52 // MultiPointZ is a set of vertices.
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	53 MultiPointZ []Vertex
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	54
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	55 // LineStringZ is a line string formed of vertices.
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	56 LineStringZ []Vertex
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	57
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	58 // MultiLineStringZ is a set of line strings.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	59 MultiLineStringZ []LineStringZ
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	60
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	61 // Box2D is 2D area from (X1, Y1) to (X2, Y2).
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	62 Box2D struct {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	63 X1 float64
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	64 Y1 float64
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	65 X2 float64
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	66 Y2 float64
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	67 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	68
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	69 // Plane2D is a 2D plane (a line in 2D space).
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	70 Plane2D struct {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	71 A float64
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	72 B float64
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	73 C float64
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	74 }
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	75
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	76 // Plane3D is a 3D plane.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	77 Plane3D struct {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	78 A float64
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	79 B float64
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	80 C float64
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	81 D float64
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	82 }
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	83 )
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	84
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	85 // Plane3D returns the plane in which
b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	86 // the three points of the triangles are in.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	87 func (t *Triangle) Plane3D() Plane3D {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	88
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	89 v0 := t[1].Sub(t[0])
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	90 v1 := t[2].Sub(t[0])
5703 d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	91 n := v0.Cross(v1)
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	92
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	93 // If the length of normal is near zero assume we have
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	94 // a plane constant in z with an average z value of
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	95 // the three vertices.
5716 61eff98a40ae Prevent infinity heights in rasterizing the tin. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5706 diff changeset	96 // A normal z component value of zero would cause a
61eff98a40ae Prevent infinity heights in rasterizing the tin. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5706 diff changeset	97 // division by zero which would lead to an infinity value.
61eff98a40ae Prevent infinity heights in rasterizing the tin. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5706 diff changeset	98 // In this case we apply the averaging, too.
5703 d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	99 // This should protect us from the effects of collinear
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	100 // geometries.
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	101 l := n.Length()
5716 61eff98a40ae Prevent infinity heights in rasterizing the tin. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5706 diff changeset	102 if l < 1e-7 \|\| math.Abs(n.Z) < 1e-7 {
5703 d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	103 sum := t[0].Z + t[1].Z + t[2].Z
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	104 return Plane3D{
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	105 A: 0,
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	106 B: 0,
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	107 C: 1,
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	108 D: -sum / 3,
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	109 }
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	110 }
d2ccf6bb6940 Make plane eval for z-values of triangles numerial more robust. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5601 diff changeset	111 n = n.Scale(1 / l)
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	112
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	113 // xnx+ yny+ z*nz + d = 0
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	114 // d = - (xnx+ yny + z*nz)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	115 d := -t[0].Dot(n)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	116 return Plane3D{
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	117 A: n.X,
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	118 B: n.Y,
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	119 C: n.Z,
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	120 D: d,
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	121 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	122 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	123
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	124 // BBox calculates the 2D (in X/Y plane) bounding box
b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	125 // of the triangle.
2494 a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	126 func (t *Triangle) BBox() Box2D {
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	127 minX := math.Min(math.Min(t[0].X, t[1].X), t[2].X)
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	128 maxX := math.Max(math.Max(t[0].X, t[1].X), t[2].X)
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	129 minY := math.Min(math.Min(t[0].Y, t[1].Y), t[2].Y)
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	130 maxY := math.Max(math.Max(t[0].Y, t[1].Y), t[2].Y)
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	131 return Box2D{
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	132 X1: minX, Y1: minY,
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	133 X2: maxX, Y2: maxY,
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	134 }
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	135 }
a727e0426240 More on triangle/clipping polygon intersection. TODO: line segment / line segment intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2492 diff changeset	136
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	137 // Inside test if b is completely inside a.
4726 c91e759007da Started with stacking shells and holes of generated polygons correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4554 diff changeset	138 func (a Box2D) Inside(b Box2D) bool {
c91e759007da Started with stacking shells and holes of generated polygons correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4554 diff changeset	139 return a.X1 >= b.X1 && a.X2 <= b.X2 &&
c91e759007da Started with stacking shells and holes of generated polygons correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4554 diff changeset	140 a.Y1 >= b.Y1 && a.Y2 <= b.Y2
c91e759007da Started with stacking shells and holes of generated polygons correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4554 diff changeset	141 }
c91e759007da Started with stacking shells and holes of generated polygons correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4554 diff changeset	142
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	143 // Size calculates the area of the box.
4768 a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	144 func (a Box2D) Size() (float64, float64) {
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	145 return a.X2 - a.X1, a.Y2 - a.Y1
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	146 }
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	147
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	148 // Empty returns true if the box has no area.
4768 a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	149 func (a Box2D) Empty() bool {
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	150 const eps = 0.0000001
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	151 return math.Abs(a.X2-a.X1) < eps &&
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	152 math.Abs(a.Y2-a.Y1) < eps
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	153 }
a2f16bbcc846 Morph differences: Directly raster A and subtract B as a raster. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4726 diff changeset	154
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	155 // Z calculates the Z value for a given X/Y value.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	156 func (p Plane3D) Z(x, y float64) float64 {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	157 // p.Ax + p.By + p.C*z + p.D = 0
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	158 return -(p.Ax + p.By + p.D) / p.C
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	159 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	160
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	161 // Eval evalutes the plane equation for a given vertex.
3770 71164b817d6e Calculate distance from planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3655 diff changeset	162 func (p Plane3D) Eval(v Vertex) float64 {
71164b817d6e Calculate distance from planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3655 diff changeset	163 return p.Av.X + p.Bv.Y + p.C*v.Z + p.D
71164b817d6e Calculate distance from planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3655 diff changeset	164 }
71164b817d6e Calculate distance from planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3655 diff changeset	165
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	166 // Normalize constructs a new vertex with unit length for a given vertex.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	167 func (v Vertex) Normalize() Vertex {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	168 s := 1 / v.Length()
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	169 return Vertex{
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	170 X: s * v.X,
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	171 Y: s * v.Y,
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	172 Z: s * v.Z,
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	173 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	174 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	175
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	176 // Dot returns the 3D dot product of the two given vertices.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	177 func (v Vertex) Dot(w Vertex) float64 {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	178 return v.Xw.X + v.Yw.Y + v.Z*w.Z
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	179 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	180
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	181 // Length return the length of the vertex.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	182 func (v Vertex) Length() float64 {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	183 return math.Sqrt(v.Dot(v))
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	184 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	185
5419 202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	186 // Box2D constructs a Box2D of this vertex.
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	187 func (v Vertex) Box2D() Box2D {
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	188 return Box2D{
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	189 X1: v.X,
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	190 Y1: v.Y,
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	191 X2: v.X,
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	192 Y2: v.Y,
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	193 }
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	194 }
202715173935 Do clipping correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5418 diff changeset	195
2483 620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	196 func area(a, b, c Vertex) float64 {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	197 return (b.Y-a.Y)(c.X-b.X) - (b.X-a.X)(c.Y-b.Y)
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	198 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	199
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	200 func inCircle(a, b, c, p Vertex) bool {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	201 dx := a.X - p.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	202 dy := a.Y - p.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	203 ex := b.X - p.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	204 ey := b.Y - p.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	205 fx := c.X - p.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	206 fy := c.Y - p.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	207
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	208 ap := dxdx + dydy
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	209 bp := exex + eyey
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	210 cp := fxfx + fyfy
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	211
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	212 return dx(eycp-bpfy)-dy(excp-bpfx)+ap(exfy-ey*fx) < 0
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	213 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	214
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	215 func circumradius(a, b, c Vertex) float64 {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	216 dx := b.X - a.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	217 dy := b.Y - a.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	218 ex := c.X - a.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	219 ey := c.Y - a.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	220
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	221 bl := dxdx + dydy
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	222 cl := exex + eyey
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	223 d := dxey - dyex
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	224
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	225 x := (eybl - dycl) * 0.5 / d
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	226 y := (dxcl - exbl) * 0.5 / d
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	227
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	228 r := xx + yy
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	229
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	230 if bl == 0 \|\| cl == 0 \|\| d == 0 \|\| r == 0 {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	231 return infinity
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	232 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	233
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	234 return r
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	235 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	236
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	237 func circumcenter(a, b, c Vertex) Vertex {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	238 dx := b.X - a.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	239 dy := b.Y - a.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	240 ex := c.X - a.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	241 ey := c.Y - a.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	242
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	243 bl := dxdx + dydy
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	244 cl := exex + eyey
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	245 d := dxey - dyex
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	246
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	247 x := a.X + (eybl-dycl)*0.5/d
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	248 y := a.Y + (dxcl-exbl)*0.5/d
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	249
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	250 return Vertex{X: x, Y: y}
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	251 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	252
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	253 func polygonArea(points []Vertex) float64 {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	254 var result float64
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	255 for i, p := range points {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	256 q := points[(i+1)%len(points)]
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	257 result += (p.X - q.X) * (p.Y + q.Y)
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	258 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	259 return result / 2
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	260 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	261
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	262 // Distance2D returns the distance of the two vertices in the X/Y plane.
2483 620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	263 func (v Vertex) Distance2D(w Vertex) float64 {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	264 return math.Hypot(v.X-w.X, v.Y-w.Y)
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	265 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	266
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	267 // Distance returns the distance of the two vertices.
3650 01ce3ba9b0d0 Fixed generating of random points. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3646 diff changeset	268 func (v Vertex) Distance(w Vertex) float64 {
01ce3ba9b0d0 Fixed generating of random points. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3646 diff changeset	269 v = v.Sub(w)
01ce3ba9b0d0 Fixed generating of random points. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3646 diff changeset	270 return math.Sqrt(v.Dot(v))
01ce3ba9b0d0 Fixed generating of random points. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3646 diff changeset	271 }
01ce3ba9b0d0 Fixed generating of random points. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3646 diff changeset	272
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	273 // Minimize adjust this vertex v to hold the minimum
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	274 // values component-wise of v and w.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	275 func (v *Vertex) Minimize(w Vertex) {
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	276 if w.X < v.X {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	277 v.X = w.X
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	278 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	279 if w.Y < v.Y {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	280 v.Y = w.Y
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	281 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	282 if w.Z < v.Z {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	283 v.Z = w.Z
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	284 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	285 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	286
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	287 // Maximize adjust this vertex v to hold the maximum
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	288 // values component-wise of v and w.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	289 func (v *Vertex) Maximize(w Vertex) {
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	290 if w.X > v.X {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	291 v.X = w.X
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	292 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	293 if w.Y > v.Y {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	294 v.Y = w.Y
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	295 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	296 if w.Z > v.Z {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	297 v.Z = w.Z
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	298 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	299 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	300
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	301 // SquaredDistance2D returns the squared distances of the
b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	302 // two given vertices in the X/Y plane.
2483 620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	303 func (v Vertex) SquaredDistance2D(w Vertex) float64 {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	304 dx := v.X - w.X
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	305 dy := v.Y - w.Y
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	306 return dxdx + dydy
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	307 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	308
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	309 // Sub2D returns (v - w) component-wise.
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	310 func (v Vertex) Sub2D(w Vertex) Vertex {
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	311 return Vertex{
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	312 X: v.X - w.X,
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	313 Y: v.Y - w.Y,
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	314 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	315 }
620038ade708 Incorporated fogleman's fast Delaunay triangulation adjuted to our vertex model. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2472 diff changeset	316
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	317 // Sub returns (v - w) component-wise.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	318 func (v Vertex) Sub(w Vertex) Vertex {
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	319 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	320 v.X - w.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	321 v.Y - w.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	322 v.Z - w.Z,
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	323 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	324 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	325
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	326 // Add returns (v + w) component-wise.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	327 func (v Vertex) Add(w Vertex) Vertex {
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	328 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	329 v.X + w.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	330 v.Y + w.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	331 v.Z + w.Z,
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	332 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	333 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	334
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	335 // Scale returns s*v component-wise.
730 4c05bdbf8e4b Renamed scale in Vertex to uppercase to make it public. Sascha L. Teichmann <teichmann@intevation.de> parents: 729 diff changeset	336 func (v Vertex) Scale(s float64) Vertex {
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	337 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	338 s * v.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	339 s * v.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	340 s * v.Z,
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	341 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	342 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	343
3953 4233570de212 Building octrees: Don't cause havok by building ain overly large tree if the points are not really 3D. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3770 diff changeset	344 // Interpolate returns a function that return s*b[1] + b[0]
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	345 // component-wise.
3953 4233570de212 Building octrees: Don't cause havok by building ain overly large tree if the points are not really 3D. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3770 diff changeset	346 func (b Box) Interpolate() func(Vertex) Vertex {
4233570de212 Building octrees: Don't cause havok by building ain overly large tree if the points are not really 3D. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3770 diff changeset	347 v1, v2 := b[0], b[1]
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	348 v2 = v2.Sub(v1)
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	349 return func(s Vertex) Vertex {
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	350 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	351 v2.X*s.X + v1.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	352 v2.Y*s.Y + v1.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	353 v2.Z*s.Z + v1.Z,
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	354 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	355 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	356 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	357
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	358 // Less returns if one of v component is less than the
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	359 // corresponing component in w.
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	360 func (v Vertex) Less(w Vertex) bool {
ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	361 return v.X < w.X \|\| v.Y < w.Y \|\| v.Z < w.Z
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	362 }
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	363
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	364 // NewLine return a line of point/direction.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	365 func NewLine(p1, p2 Vertex) Line {
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	366 return Line{
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	367 p2.Sub(p1),
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	368 p1,
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	369 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	370 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	371
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	372 // Eval returns the vertex for t*l[0] + l[1].
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	373 func (l Line) Eval(t float64) Vertex {
730 4c05bdbf8e4b Renamed scale in Vertex to uppercase to make it public. Sascha L. Teichmann <teichmann@intevation.de> parents: 729 diff changeset	374 return l[0].Scale(t).Add(l[1])
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	375 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	376
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	377 // IntersectHorizontal returns the intersection point
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	378 // for a given z value.
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	379 func (l Line) IntersectHorizontal(h float64) Vertex {
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	380 t := (h - l[1].Z) / l[0].Z
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	381 return l.Eval(t)
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	382 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	383
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	384 func side(z, h float64) int {
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	385 switch {
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	386 case z < h:
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	387 return -1
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	388 case z > h:
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	389 return +1
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	390 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	391 return 0
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	392 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	393
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	394 // Dot2 calculates the 2D dot product of the vertices.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	395 func (v Vertex) Dot2(w Vertex) float64 {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	396 return v.Xw.X + v.Yw.Y
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	397 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	398
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	399 // Contains returns true if the given point is inside the triangle.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	400 func (t *Triangle) Contains(x, y float64) bool {
4554 23236657b032 Use Sub2D in triangles 2D contains. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4550 diff changeset	401 v0 := t[2].Sub2D(t[0])
23236657b032 Use Sub2D in triangles 2D contains. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4550 diff changeset	402 v1 := t[1].Sub2D(t[0])
23236657b032 Use Sub2D in triangles 2D contains. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4550 diff changeset	403 v2 := Vertex{X: x, Y: y}.Sub2D(t[0])
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	404
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	405 dot00 := v0.Dot2(v0)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	406 dot01 := v0.Dot2(v1)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	407 dot02 := v0.Dot2(v2)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	408 dot11 := v1.Dot2(v1)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	409 dot12 := v1.Dot2(v2)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	410
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	411 // Compute barycentric coordinates
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	412 invDenom := 1 / (dot00dot11 - dot01dot01)
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	413 u := (dot11dot02 - dot01dot12) * invDenom
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	414 v := (dot00dot12 - dot01dot02) * invDenom
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	415
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	416 // Check if point is in triangle
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	417 return u >= 0 && v >= 0 && u+v < 1
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	418 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	419
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	420 // IntersectHorizontal calculates the line string that
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	421 // results when cutting a triangle a a certain height.
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	422 // Can be empty (on intersection),
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	423 // one vertex (only touching an vertex) or
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	424 // two vertices (real intersection).
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	425 func (t *Triangle) IntersectHorizontal(h float64) LineStringZ {
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	426 sides := [3]int{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	427 side(t[0].Z, h),
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	428 side(t[1].Z, h),
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	429 side(t[2].Z, h),
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	430 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	431
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	432 var points LineStringZ
689 614135d69823 octree: prepare storing the lines to file in contouring tool. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 687 diff changeset	433
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	434 for i := 0; i < 3; i++ {
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	435 j := (i + 1) % 3
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	436 si := sides[i]
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	437 sj := sides[j]
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	438
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	439 switch {
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	440 case si == 0 && sj == 0:
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	441 // both on plane
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	442 points = append(points, t[i], t[j])
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	443 case si == 0 && sj != 0:
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	444 // first on plane
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	445 points = append(points, t[i])
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	446 case si != 0 && sj == 0:
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	447 // second on plane
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	448 points = append(points, t[j])
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	449 case si == sj:
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	450 // both on same side
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	451 default:
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	452 // real intersection
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	453 v := NewLine(t[i], t[j]).IntersectHorizontal(h)
687 be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	454 points = append(points, v)
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	455 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	456 }
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	457
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	458 return points
be90ab542aa7 octree: contouring: Do the math to calculate the intersection points of the triangles and the planes. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 674 diff changeset	459 }
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	460
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	461 func linearScale(x1, y1, x2, y2 float64) func(Vertex) float64 {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	462 dx := x2 - x1
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	463 dy := y2 - y1
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	464
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	465 switch {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	466 case dx != 0:
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	467 return func(v Vertex) float64 {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	468 return (v.X - x1) / dx
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	469 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	470 case dy != 0:
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	471 return func(v Vertex) float64 {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	472 return (v.Y - y1) / dy
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	473 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	474 default:
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	475 return func(Vertex) float64 {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	476 return 0
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	477 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	478 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	479 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	480
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	481 // BBox calcultes the 2D bounding box in the X/Y plane
b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	482 // of the given line string.
3639 2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	483 func (ls LineStringZ) BBox() Box2D {
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	484
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	485 min := Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64}
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	486 max := Vertex{-math.MaxFloat64, -math.MaxFloat64, -math.MaxFloat64}
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	487
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	488 for _, v := range ls {
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	489 min.Minimize(v)
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	490 max.Maximize(v)
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	491 }
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	492
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	493 return Box2D{
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	494 X1: min.X,
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	495 Y1: min.Y,
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	496 X2: max.X,
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	497 Y2: max.Y,
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	498 }
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	499 }
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	500
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	501 // Area calculated the area of the line string.
3639 2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	502 func (ls LineStringZ) Area() float64 {
3646 810b28f59b8b Generate random points for second mesh. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3639 diff changeset	503 return polygonArea(ls)
3639 2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	504 }
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	505
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	506 // Reverse reverses the the vertices of this line string in place.
3639 2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	507 func (ls LineStringZ) Reverse() {
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	508 for i, j := 0, len(ls)-1; i < j; i, j = i+1, j-1 {
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	509 ls[i], ls[j] = ls[j], ls[i]
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	510 }
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	511 }
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	512
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	513 func (ls LineStringZ) order(position func(Vertex) float64) {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	514 type posVertex struct {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	515 pos float64
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	516 v Vertex
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	517 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	518 positions := make([]posVertex, len(ls))
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	519 for i, v := range ls {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	520 positions[i] = posVertex{position(v), v}
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	521 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	522 sort.Slice(positions, func(i, j int) bool {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	523 return positions[i].pos < positions[j].pos
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	524 })
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	525 for i := range positions {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	526 ls[i] = positions[i].v
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	527 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	528 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	529
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	530 // EpsEquals returns true if v and w are equal component-wise
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	531 // with the values within a epsilon range.
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	532 func (v Vertex) EpsEquals(w Vertex) bool {
769 ba2007b746ef Fixed nasty typo. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 768 diff changeset	533 const eps = 1e-5
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	534 return math.Abs(v.X-w.X) < eps &&
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	535 math.Abs(v.Y-w.Y) < eps && math.Abs(v.Z-w.Z) < eps
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	536 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	537
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	538 // EpsEquals2D returns true if v and w are equal component-wise
4550 aa2d0006e742 Write iso lines between classes to SVG for debugging. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4542 diff changeset	539 // in the X/Y plane with the values within a epsilon range.
aa2d0006e742 Write iso lines between classes to SVG for debugging. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4542 diff changeset	540 func (v Vertex) EpsEquals2D(w Vertex) bool {
aa2d0006e742 Write iso lines between classes to SVG for debugging. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4542 diff changeset	541 const eps = 1e-5
aa2d0006e742 Write iso lines between classes to SVG for debugging. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4542 diff changeset	542 return math.Abs(v.X-w.X) < eps &&
aa2d0006e742 Write iso lines between classes to SVG for debugging. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4542 diff changeset	543 math.Abs(v.Y-w.Y) < eps
aa2d0006e742 Write iso lines between classes to SVG for debugging. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4542 diff changeset	544 }
aa2d0006e742 Write iso lines between classes to SVG for debugging. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4542 diff changeset	545
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	546 // JoinOnLine joins the the elements of a given multi line string
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	547 // under the assumption that the segments are all on the line segment
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	548 // from (x1, y1) to (x2, y2).
763 d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	549 func (mls MultiLineStringZ) JoinOnLine(x1, y1, x2, y2 float64) MultiLineStringZ {
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	550
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	551 position := linearScale(x1, y1, x2, y2)
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	552
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	553 type posLineString struct {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	554 pos float64
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	555 line LineStringZ
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	556 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	557
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	558 positions := make([]posLineString, 0, len(mls))
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	559
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	560 for _, ls := range mls {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	561 if len(ls) == 0 {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	562 continue
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	563 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	564 // order the atoms first
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	565 ls.order(position)
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	566 positions = append(positions, posLineString{position(ls[0]), ls})
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	567 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	568
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	569 sort.Slice(positions, func(i, j int) bool {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	570 return positions[i].pos < positions[j].pos
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	571 })
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	572
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	573 out := make(MultiLineStringZ, 0, len(positions))
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	574
796 0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	575 var ignored int
0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	576
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	577 for i := range positions {
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	578 curr := positions[i].line
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	579 if l := len(out); l > 0 {
796 0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	580 last := out[l-1]
0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	581
0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	582 if last[len(last)-1].EpsEquals(curr[0]) {
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	583 out[l-1] = append(last[:len(last)-1], curr...)
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	584 continue
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	585 }
796 0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	586 if position(last[len(last)-1]) > position(curr[0]) {
0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	587 ignored++
0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	588 continue
0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	589 }
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	590 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	591 out = append(out, curr)
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	592 }
3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	593
5490 5f47eeea988d Use own logging package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5428 diff changeset	594 log.Infof("ignored parts: %d\n", ignored)
796 0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	595
768 3219e7e34953 Join neighbored linestring segments in octree cross sections and sort them along the input line. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 763 diff changeset	596 return out
763 d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	597 }
d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	598
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	599 // Write writes a Vertex as three 64 bit values in little endian order
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	600 // to the given writer.
729 b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	601 func (v *Vertex) Write(w io.Writer) error {
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	602 if err := binary.Write(
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	603 w, binary.LittleEndian, math.Float64bits(v.X)); err != nil {
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	604 return err
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	605 }
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	606 if err := binary.Write(
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	607 w, binary.LittleEndian, math.Float64bits(v.Y)); err != nil {
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	608 return err
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	609 }
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	610 return binary.Write(
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	611 w, binary.LittleEndian, math.Float64bits(v.Z))
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	612 }
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	613
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	614 // Read fills this vertex with three 64 bit values stored as
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	615 // little endian from the given reader.
729 b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	616 func (v *Vertex) Read(r io.Reader) error {
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	617 var buf [8]byte
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	618 b := buf[:]
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	619 if _, err := io.ReadFull(r, b); err != nil {
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	620 return nil
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	621 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	622 v.X = math.Float64frombits(binary.LittleEndian.Uint64(b))
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	623 if _, err := io.ReadFull(r, b); err != nil {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	624 return nil
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	625 }
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	626 v.Y = math.Float64frombits(binary.LittleEndian.Uint64(b))
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	627 if _, err := io.ReadFull(r, b); err != nil {
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	628 return nil
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	629 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	630 v.Z = math.Float64frombits(binary.LittleEndian.Uint64(b))
726 5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	631 return nil
5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 718 diff changeset	632 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	633
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	634 // AsWKB returns the WKB representation of the given multi line string.
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	635 func (mls MultiLineStringZ) AsWKB() []byte {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	636
924 c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	637 // pre-calculate size to avoid reallocations.
c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	638 size := 1 + 4 + 4
c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	639 for _, ml := range mls {
c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	640 size += 1 + 4 + 4 + len(ml)38
c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	641 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	642
924 c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	643 buf := bytes.NewBuffer(make([]byte, 0, size))
c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	644
2471 63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	645 binary.Write(buf, binary.LittleEndian, wkb.NDR)
63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	646 binary.Write(buf, binary.LittleEndian, wkb.MultiLineStringZ)
924 c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	647 binary.Write(buf, binary.LittleEndian, uint32(len(mls)))
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	648
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	649 for _, ml := range mls {
2471 63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	650 binary.Write(buf, binary.LittleEndian, wkb.NDR)
63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	651 binary.Write(buf, binary.LittleEndian, wkb.LineStringZ)
924 c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	652 binary.Write(buf, binary.LittleEndian, uint32(len(ml)))
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	653 for _, p := range ml {
924 c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	654 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.X))
c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	655 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Y))
c8146132059e Precalculate WKB size for MultiLineStringZ to avoid reallocations. Sascha L. Teichmann <teichmann@intevation.de> parents: 824 diff changeset	656 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Z))
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	657 }
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	658 }
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	659
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	660 return buf.Bytes()
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	661 }
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	662
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	663 // AsWKB2D returns the WKB representation of the given multi line string
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	664 // leaving the z component out.
925 15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	665 func (mls MultiLineStringZ) AsWKB2D() []byte {
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	666
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	667 // pre-calculate size to avoid reallocations.
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	668 size := 1 + 4 + 4
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	669 for _, ml := range mls {
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	670 size += 1 + 4 + 4 + len(ml)28
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	671 }
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	672
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	673 buf := bytes.NewBuffer(make([]byte, 0, size))
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	674
2471 63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	675 binary.Write(buf, binary.LittleEndian, wkb.NDR)
63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	676 binary.Write(buf, binary.LittleEndian, wkb.MultiLineString)
925 15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	677 binary.Write(buf, binary.LittleEndian, uint32(len(mls)))
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	678
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	679 for _, ml := range mls {
2471 63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	680 binary.Write(buf, binary.LittleEndian, wkb.NDR)
63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	681 binary.Write(buf, binary.LittleEndian, wkb.LineString)
925 15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	682 binary.Write(buf, binary.LittleEndian, uint32(len(ml)))
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	683 for _, p := range ml {
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	684 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.X))
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	685 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Y))
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	686 }
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	687 }
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	688
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	689 return buf.Bytes()
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	690 }
15bf101e1522 Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards. Sascha L. Teichmann <teichmann@intevation.de> parents: 924 diff changeset	691
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	692 // CCW returns true if this line string is oriented counter clockwise.
4542 56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	693 func (ls LineStringZ) CCW() bool {
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	694 var sum float64
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	695 for i, v1 := range ls {
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	696 v2 := ls[(i+1)%len(ls)]
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	697 sum += (v2.X - v1.X) * (v2.Y + v1.Y)
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	698 }
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	699 return sum > 0
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	700 }
56f4e8cbfab7 Sew together triangles that totally inside a single class. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 3953 diff changeset	701
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	702 // Join joins two lines leaving the first of the second out.
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	703 func (ls LineStringZ) Join(other LineStringZ) LineStringZ {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	704 nline := make(LineStringZ, len(ls)+len(other)-1)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	705 copy(nline, ls)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	706 copy(nline[len(ls):], other[1:])
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	707 return nline
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	708 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	709
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	710 // Merge merges line segments of a given multi line string
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	711 // by finding common start and end vertices.
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	712 func (mls MultiLineStringZ) Merge() MultiLineStringZ {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	713
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	714 var out MultiLineStringZ
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	715
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	716 min := Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64}
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	717
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	718 for _, line := range mls {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	719 for _, v := range line {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	720 min.Minimize(v)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	721 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	722 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	723
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	724 type point struct {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	725 x int64
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	726 y int64
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	727 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	728
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	729 const precision = 1e7
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	730
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	731 quant := func(v Vertex) point {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	732 return point{
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	733 x: int64(math.Round((v.X - min.X) * precision)),
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	734 y: int64(math.Round((v.Y - min.Y) * precision)),
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	735 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	736 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	737
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	738 heads := make(map[point]*[]LineStringZ)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	739
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	740 for _, line := range mls {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	741 if len(line) < 2 {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	742 out = append(out, line)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	743 continue
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	744 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	745 head := quant(line[0])
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	746 tail := quant(line[len(line)-1])
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	747 if head == tail { // its already a ring
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	748 out = append(out, line)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	749 continue
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	750 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	751
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	752 if hs := heads[tail]; hs != nil {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	753 l := len(*hs)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	754 last := (*hs)[l-1]
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	755 if l == 1 {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	756 delete(heads, tail)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	757 } else {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	758 (*hs)[l-1] = nil
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	759 hs = (hs)[:l-1]
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	760 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	761 line = line.Join(last)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	762
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	763 if head == quant(line[len(line)-1]) { // its a ring
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	764 out = append(out, line)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	765 continue
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	766 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	767 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	768
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	769 if hs := heads[head]; hs != nil {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	770 hs = append(hs, line)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	771 } else {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	772 heads[head] = &[]LineStringZ{line}
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	773 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	774 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	775
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	776 again:
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	777 for head, lines := range heads {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	778 for i, line := range *lines {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	779 tail := quant(line[len(line)-1])
940 be7b83638ec8 Simplified line merging in generating contour lines. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 928 diff changeset	780 for hs := heads[tail]; hs != nil && len(*hs) > 0; hs = heads[tail] {
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	781 l := len(*hs)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	782 last := (*hs)[l-1]
940 be7b83638ec8 Simplified line merging in generating contour lines. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 928 diff changeset	783 (*hs)[l-1] = nil
be7b83638ec8 Simplified line merging in generating contour lines. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 928 diff changeset	784 hs = (hs)[:l-1]
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	785 line = line.Join(last)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	786
940 be7b83638ec8 Simplified line merging in generating contour lines. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 928 diff changeset	787 if tail = quant(line[len(line)-1]); head == tail { // its a ring
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	788 out = append(out, line)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	789 // remove from current lines
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	790 copy((lines)[i:], (lines)[i+1:])
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	791 (lines)[len(lines)-1] = nil
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	792 lines = (lines)[:len(*lines)-1]
940 be7b83638ec8 Simplified line merging in generating contour lines. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 928 diff changeset	793 goto again
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	794 }
940 be7b83638ec8 Simplified line merging in generating contour lines. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 928 diff changeset	795 // overwrite in current lines
be7b83638ec8 Simplified line merging in generating contour lines. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 928 diff changeset	796 (*lines)[i] = line
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	797 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	798 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	799 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	800
988 7dfd3db94e6d In preparation of persisting import jobs logging is done through an interface. Sascha L. Teichmann <teichmann@intevation.de> parents: 968 diff changeset	801 // rings := len(out)
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	802
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	803 // The rest are open line strings.
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	804 for _, lines := range heads {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	805 for _, line := range *lines {
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	806 out = append(out, line)
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	807 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	808 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	809
5490 5f47eeea988d Use own logging package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5428 diff changeset	810 // log.Debugf("segments before/after merge: %d/%d (%d rings)\n",
988 7dfd3db94e6d In preparation of persisting import jobs logging is done through an interface. Sascha L. Teichmann <teichmann@intevation.de> parents: 968 diff changeset	811 // len(mls), len(out), rings)
928 0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	812
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	813 return out
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	814 }
0a0013fbda4a octree2contour: Merge multi linestrings in user land before sending them to database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 925 diff changeset	815
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	816 // Rect returns the bounding box of this box as separated coordinates.
5320 866eae1bd888 Upgraded the dependencies of the Gemma server. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4854 diff changeset	817 func (a Box2D) Rect() ([2]float64, [2]float64) {
866eae1bd888 Upgraded the dependencies of the Gemma server. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4854 diff changeset	818 return [2]float64{a.X1, a.Y1}, [2]float64{a.X2, a.Y2}
2492 10681749371d Implemented the BBox/clipping polygon test. TODO: triangle/clipping polygon test. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2483 diff changeset	819 }
10681749371d Implemented the BBox/clipping polygon test. TODO: triangle/clipping polygon test. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2483 diff changeset	820
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	821 // Intersects checks if two Box2Ds intersect.
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	822 func (a Box2D) Intersects(b Box2D) bool {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	823 return !(a.X2 < a.X1 \|\| a.X2 < b.X1 \|\|
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	824 a.Y2 < a.Y1 \|\| a.Y2 < b.Y1)
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	825 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	826
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	827 // Contains returns true if the given point is inside the box.
2466 a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	828 func (a Box2D) Contains(x, y float64) bool {
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	829 return a.X1 <= x && x <= a.X2 &&
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	830 a.Y1 <= y && y <= a.Y2
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	831 }
a1e751c08c56 Calculate difference on single core. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1692 diff changeset	832
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	833 // Xi returns the i-th x component.
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	834 func (a Box2D) Xi(i int) float64 {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	835 if i == 0 {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	836 return a.X1
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	837 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	838 return a.X2
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	839 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	840
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	841 // Yi returns the i-th y component.
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	842 func (a Box2D) Yi(i int) float64 {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	843 if i == 0 {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	844 return a.Y1
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	845 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	846 return a.Y2
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	847 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	848
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	849 // Union calculates the united bounding box of the two given boxes.
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	850 func (a Box2D) Union(b Box2D) Box2D {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	851 return Box2D{
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	852 X1: math.Min(a.X1, b.X1),
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	853 Y1: math.Min(a.Y1, b.Y1),
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	854 X2: math.Max(a.X2, b.X2),
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	855 Y2: math.Max(a.Y2, b.Y2),
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	856 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	857 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2494 diff changeset	858
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	859 // Area returns the area of the box.
3639 2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	860 func (a Box2D) Area() float64 {
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	861 return (a.X2 - a.X1) * (a.Y2 - a.Y1)
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	862 }
2a4216c81e7b Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2572 diff changeset	863
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	864 // NewPlane2D creates a new Plane2D from two given points.
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	865 func NewPlane2D(x1, y1, x2, y2 float64) Plane2D {
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	866 b := x2 - x1
9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	867 a := -(y2 - y1)
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	868
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	869 l := math.Sqrt(aa + bb)
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	870 a /= l
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	871 b /= l
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	872
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	873 // ax1 + by1 + c = 0
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	874 c := -(ax1 + by1)
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	875 return Plane2D{a, b, c}
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	876 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	877
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	878 // Eval determines the distance of a given point
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	879 // from the plane. The sign of the result indicates
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	880 // the sideness.
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	881 func (p Plane2D) Eval(x, y float64) float64 {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	882 return p.Ax + p.By + p.C
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	883 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	884
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	885 const epsPlane = 1e-5
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	886
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	887 func sides(s int, x float64) int {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	888 if math.Signbit(x) {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	889 return s \| 2
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	890 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	891 return s \| 1
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	892 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	893
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	894 // IntersectsPlane checks if a Box2D intersects with
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	895 // a given Plane2D.
774 c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	896 func (a Box2D) IntersectsPlane(p Plane2D) bool {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	897 var s int
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	898 for i := 0; i < 2; i++ {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	899 x := a.Xi(i)
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	900 for j := 0; j < 2; j++ {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	901 y := a.Yi(j)
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	902 v := p.Eval(x, y)
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	903 if math.Abs(v) < epsPlane {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	904 //log.Printf("on line")
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	905 return true
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	906 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	907 if s = sides(s, v); s == 3 {
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	908 //log.Printf("... on both sides (djt)")
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	909 return true
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	910 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	911 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	912 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	913 //log.Printf("side: %d\n", s)
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	914 return false
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	915 }
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	916
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	917 // Cross calculates the cross product of two vertices.
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	918 func (v Vertex) Cross(w Vertex) Vertex {
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	919 return Vertex{
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	920 v.Yw.Z - v.Zw.Y,
ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	921 v.Zw.X - v.Xw.Z,
ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	922 v.Xw.Y - v.Yw.X,
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	923 }
9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	924 }
9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	925
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	926 // Intersection calcultes the 2D intersection point of
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	927 // two Plane2Ds. If they do not intersect the returned
f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	928 // bool flags is set to false.
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	929 func (p Plane2D) Intersection(o Plane2D) (float64, float64, bool) {
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	930
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	931 u1 := Vertex{p.A, p.B, p.C}
ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	932 u2 := Vertex{o.A, o.B, o.C}
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	933
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	934 plane := u1.Cross(u2)
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	935
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	936 if plane.Z == 0 {
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	937 return 0, 0, false
9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	938 }
9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	939
1329 ea2143adc6d3 Named method recievers consistently to make golint happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1017 diff changeset	940 return plane.X / plane.Z, plane.Y / plane.Z, true
778 9be20bd0f131 Fixed a bug with 2d planes (lines) found while working on line intersections. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 774 diff changeset	941 }
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	942
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	943 // VerticalLine is a 2D line segment.
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	944 type VerticalLine struct {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	945 x1 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	946 y1 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	947 x2 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	948 y2 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	949
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	950 line Plane2D
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	951 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	952
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	953 // NewVerticalLine creates a new 2D line segment.
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	954 func NewVerticalLine(x1, y1, x2, y2 float64) *VerticalLine {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	955 return &VerticalLine{
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	956 x1: x1,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	957 y1: y1,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	958 x2: x2,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	959 y2: y2,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	960 line: NewPlane2D(x1, y1, x2, y2),
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	961 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	962 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	963
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	964 func onPlane(x float64) bool { return math.Abs(x) < epsPlane }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	965
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	966 func relative(v1, v2 Vertex) func(x, y float64) float64 {
795 bd5f38eb6153 Vertical Triangle intersection: Fixed function to determine where intersection point Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 792 diff changeset	967 ls := linearScale(v1.X, v1.Y, v2.X, v2.Y)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	968 return func(x, y float64) float64 {
795 bd5f38eb6153 Vertical Triangle intersection: Fixed function to determine where intersection point Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 792 diff changeset	969 return ls(Vertex{x, y, 0})
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	970 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	971 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	972
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	973 func interpolate(a, b float64) func(float64) float64 {
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	974 return func(x float64) float64 {
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	975 return (b-a)*x + a
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	976 }
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	977 }
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	978
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	979 func linear(v1, v2 Vertex) func(t float64) Vertex {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	980 return func(t float64) Vertex {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	981 return Vertex{
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	982 (v2.X-v1.X)*t + v1.X,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	983 (v2.Y-v1.Y)*t + v1.Y,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	984 (v2.Z-v1.Z)*t + v1.Z,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	985 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	986 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	987 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	988
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	989 func inRange(a float64) bool { return 0 <= a && a <= 1 }
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	990
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	991 // Intersection intersects a line segment with a triangle.
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	992 func (vl VerticalLine) Intersection(t Triangle) LineStringZ {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	993
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	994 var out LineStringZ
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	995
815 01019d4c8359 Cross section: Made triangle intersection less spammy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 813 diff changeset	996 //defer func() { log.Printf("length out: %d\n", len(out)) }()
796 0cc97135717c More fixes to vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 795 diff changeset	997
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	998 edges:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	999 for i := 0; i < 3 && len(out) < 2; i++ {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1000 j := (i + 1) % 3
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1001 edge := NewPlane2D(t[i].X, t[i].Y, t[j].X, t[j].Y)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1002
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1003 s1 := edge.Eval(vl.x1, vl.y1)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1004 s2 := edge.Eval(vl.x2, vl.y2)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1005
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1006 o1 := onPlane(s1)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1007 o2 := onPlane(s2)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1008
815 01019d4c8359 Cross section: Made triangle intersection less spammy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 813 diff changeset	1009 // log.Printf("s1, s2: %t %t (%f %f)\n", o1, o2, s1, s2)
795 bd5f38eb6153 Vertical Triangle intersection: Fixed function to determine where intersection point Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 792 diff changeset	1010
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1011 switch {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1012 case o1 && o2:
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1013 pos := relative(t[i], t[j])
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1014 t1 := pos(vl.x1, vl.y1)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1015 t2 := pos(vl.x2, vl.y2)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1016
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1017 r1 := inRange(t1)
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1018 r2 := inRange(t2)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1019
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1020 switch {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1021 case r1 && r2:
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1022 lin := linear(t[i], t[j])
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1023 out = append(out, lin(t1), lin(t2))
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1024 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1025
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1026 case !r1 && !r2: // the hole edge
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1027 out = append(out, t[i], t[j])
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1028 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1029 case !r1:
789 d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1030 if t1 < 0 {
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1031 // below first -> clip by first
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1032 lin := linear(t[i], t[j])
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1033 out = append(out, t[i], lin(t2))
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1034 } else {
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1035 // above second -> clip by second
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1036 lin := linear(t[i], t[j])
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1037 out = append(out, lin(t2), t[j])
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1038 }
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1039 return out
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1040 case !r2:
789 d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1041 if t2 < 0 {
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1042 // below first -> clip by first
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1043 lin := linear(t[i], t[j])
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1044 out = append(out, t[i], lin(t1))
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1045 } else {
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1046 // above second -> clip by second
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1047 lin := linear(t[i], t[j])
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1048 out = append(out, lin(t1), t[j])
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1049 }
d43e61044ad8 Fill in last remaining corner cases in vertical triangle interpolation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 788 diff changeset	1050 return out
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1051 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1052
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1053 case o1:
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1054 t1 := relative(t[i], t[j])(vl.x1, vl.y1)
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1055 if !inRange(t1) {
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1056 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1057 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1058 out = append(out, linear(t[i], t[j])(t1))
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1059
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1060 case o2:
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1061 t2 := relative(t[i], t[j])(vl.x2, vl.y2)
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1062 if !inRange(t2) {
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1063 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1064 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1065 out = append(out, linear(t[i], t[j])(t2))
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1066
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1067 default:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1068 x, y, intersects := vl.line.Intersection(edge)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1069 if !intersects {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1070 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1071 }
795 bd5f38eb6153 Vertical Triangle intersection: Fixed function to determine where intersection point Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 792 diff changeset	1072
815 01019d4c8359 Cross section: Made triangle intersection less spammy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 813 diff changeset	1073 // log.Println("Intersection -----------------------------")
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1074 t1 := relative(t[i], t[j])(x, y)
815 01019d4c8359 Cross section: Made triangle intersection less spammy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 813 diff changeset	1075 // log.Printf("relative pos: %f\n", t1)
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1076 if !inRange(t1) {
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1077 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1078 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1079
815 01019d4c8359 Cross section: Made triangle intersection less spammy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 813 diff changeset	1080 // log.Println("valid ***************")
795 bd5f38eb6153 Vertical Triangle intersection: Fixed function to determine where intersection point Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 792 diff changeset	1081
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1082 z := interpolate(t[j].Z, t[i].Z)(t1)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1083 n := Vertex{x, y, z}
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1084
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1085 if math.Signbit(s1) != math.Signbit(s2) {
815 01019d4c8359 Cross section: Made triangle intersection less spammy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 813 diff changeset	1086 // log.Println("\ton different sides")
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1087 // different sides -> vertex on edge.
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1088 out = append(out, n)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1089 } else { // same side -> inside. Find peer
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1090 if len(out) > 0 { // we already have our peer
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1091 out = append(out, n)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1092 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1093 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1094
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1095 for k := 0; k < 3; k++ {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1096 if k == i {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1097 continue
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1098 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1099 l := (k + 1) % 3
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1100 other := NewPlane2D(t[k].X, t[k].Y, t[l].X, t[l].Y)
813 1a808929c2c5 Cross sections: Fixed problem that certain inputs don't deliver data. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 796 diff changeset	1101 xo, yo, intersects := vl.line.Intersection(other)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1102 if !intersects {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1103 continue
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1104 }
813 1a808929c2c5 Cross sections: Fixed problem that certain inputs don't deliver data. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 796 diff changeset	1105 t2 := relative(t[k], t[l])(xo, yo)
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1106 if !inRange(t2) {
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1107 continue
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1108 }
813 1a808929c2c5 Cross sections: Fixed problem that certain inputs don't deliver data. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 796 diff changeset	1109 zo := interpolate(t[k].Z, t[l].Z)(t2)
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1110
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1111 m := Vertex{xo, yo, zo}
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1112
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1113 var xn, yn, xf, yf float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1114
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1115 // Which is nearer to current edge?
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1116 if math.Abs(s1) < math.Abs(s2) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1117 xn, yn = vl.x1, vl.y1
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1118 xf, yf = vl.x2, vl.y2
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1119 } else {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1120 xn, yn = vl.x2, vl.y2
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1121 xf, yf = vl.x1, vl.y1
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1122 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1123
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1124 if onPlane(other.Eval(xn, yn)) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1125 // triangle intersect in only point
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1126 // treat as no intersection
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1127 break edges
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1128 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1129
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1130 pos := relative(n, m)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1131
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1132 tzn := pos(xn, yn)
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1133 tzf := pos(xf, yf)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1134
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1135 if !inRange(tzn) {
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1136 // if near is out of range far is, too.
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1137 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1138 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1139
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1140 lin := interpolate(n.Z, m.Z)
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1141
9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1142 if inRange(tzf) {
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1143 m.X = xf
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1144 m.Y = yf
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1145 m.Z = lin(tzf)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1146 } // else m is clipping
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1147
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1148 n.X = xn
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1149 n.Y = yn
788 9f3a4a60dc04 Cleaned up interpolation mess in vertical triangle intersection. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 787 diff changeset	1150 n.Z = lin(tzn)
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1151
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1152 out = append(out, n, m)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1153 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1154 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1155 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1156 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1157 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1158
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1159 // supress single point touches.
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1160 if len(out) == 1 {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1161 out = out[:0]
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1162 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1163
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1164 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	1165 }
959 6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1166
5706 148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1167 // QuantizeXY quantize the X/Y values to scale and
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1168 // removes duplicates in place. The z value of
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1169 // duplicates will be averaged pairwise.
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1170 func (mpz MultiPointZ) QuantizeXY(scale float64) MultiPointZ {
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1171 type qpoint struct {
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1172 x int64
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1173 y int64
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1174 }
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1175 m := make(map[qpoint]float64, len(mpz))
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1176 for _, p := range mpz {
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1177 k := qpoint{
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1178 x: int64(math.Round(p.X * scale)),
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1179 y: int64(math.Round(p.Y * scale)),
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1180 }
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1181 if z, ok := m[k]; ok {
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1182 m[k] = (z + p.Z) * 0.5
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1183 } else {
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1184 m[k] = p.Z
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1185 }
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1186 }
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1187 i := 0
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1188 invScale := 1 / scale
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1189 for k, z := range m {
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1190 mpz[i] = Vertex{
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1191 X: float64(k.x) * invScale,
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1192 Y: float64(k.y) * invScale,
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1193 Z: z,
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1194 }
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1195 i++
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1196 }
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1197 return mpz[:i]
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1198 }
148abae1fcd0 Quantize xyz in points in X/Y to 1/QuantScale. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5703 diff changeset	1199
5428 b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1200 // Filter returns a copy removed the vertices which
b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1201 // don't pass the filter test.
b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1202 func (mpz MultiPointZ) Filter(filter func(Vertex) bool) MultiPointZ {
b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1203 n := make(MultiPointZ, 0, len(mpz))
b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1204 for _, v := range mpz {
b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1205 if filter(v) {
b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1206 n = append(n, v)
5418 e89ff1894bb4 Don't clip the points against the border polygon. The implemented way was wrong. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5416 diff changeset	1207 }
e89ff1894bb4 Don't clip the points against the border polygon. The implemented way was wrong. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5416 diff changeset	1208 }
5428 b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1209 return n
5418 e89ff1894bb4 Don't clip the points against the border polygon. The implemented way was wrong. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5416 diff changeset	1210 }
e89ff1894bb4 Don't clip the points against the border polygon. The implemented way was wrong. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5416 diff changeset	1211
5601 1222b777f51f Made golint finally happy. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5490 diff changeset	1212 // MinMax returns the extend of the point set.
5428 b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1213 func (mpz MultiPointZ) MinMax() (Vertex, Vertex) {
5413 99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1214 min := Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64}
99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1215 max := Vertex{-math.MaxFloat64, -math.MaxFloat64, -math.MaxFloat64}
5428 b8d5f1cd15fb Simplified classification. Needs testing. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5419 diff changeset	1216 for _, v := range mpz {
5413 99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1217 min.Minimize(v)
99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1218 max.Maximize(v)
99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1219 }
99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1220 return min, max
99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1221 }
99f32f0dc70c Added tools to classify vertices by their heights with class breaks. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 5320 diff changeset	1222
1692 f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1691 diff changeset	1223 // AsWKB returns a WKB representation of the given point cloud.
959 6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1224 func (mpz MultiPointZ) AsWKB() []byte {
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1225 size := 1 + 4 + 4 + len(mpz)(1+4+38)
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1226
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1227 buf := bytes.NewBuffer(make([]byte, 0, size))
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1228
2471 63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	1229 binary.Write(buf, binary.LittleEndian, wkb.NDR)
63475c8e710e Moved WKB constants to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2466 diff changeset	1230 binary.Write(buf, binary.LittleEndian, wkb.MultiPointZ)
959 6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1231 binary.Write(buf, binary.LittleEndian, uint32(len(mpz)))
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1232
2472 db0e4ab57977 Turn new point cloud into WKB form of MultiPointZ. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2471 diff changeset	1233 perPoint := bytes.NewBuffer(make([]byte, 0, 1+4))
db0e4ab57977 Turn new point cloud into WKB form of MultiPointZ. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2471 diff changeset	1234 binary.Write(perPoint, binary.LittleEndian, wkb.NDR)
db0e4ab57977 Turn new point cloud into WKB form of MultiPointZ. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2471 diff changeset	1235 binary.Write(perPoint, binary.LittleEndian, wkb.PointZ)
db0e4ab57977 Turn new point cloud into WKB form of MultiPointZ. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2471 diff changeset	1236 hdr := perPoint.Bytes()
db0e4ab57977 Turn new point cloud into WKB form of MultiPointZ. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2471 diff changeset	1237
959 6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1238 for _, p := range mpz {
2472 db0e4ab57977 Turn new point cloud into WKB form of MultiPointZ. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2471 diff changeset	1239 buf.Write(hdr)
959 6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1240 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.X))
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1241 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Y))
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1242 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Z))
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1243 }
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1244
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1245 return buf.Bytes()
6ab012d0f0c2 Started with writing an importer job for sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 940 diff changeset	1246 }
2529 45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1247
4854 b9599e5e8004 Added missing doc strings to the geometry models in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4833 diff changeset	1248 // FromWKB de-serializes this multi point z geometry from a WKB representation.
2529 45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1249 func (mpz *MultiPointZ) FromWKB(data []byte) error {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1250
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1251 r := bytes.NewReader(data)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1252
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1253 endian, err := r.ReadByte()
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1254
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1255 var order binary.ByteOrder
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1256
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1257 switch {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1258 case err != nil:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1259 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1260 case endian == wkb.NDR:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1261 order = binary.LittleEndian
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1262 case endian == wkb.XDR:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1263 order = binary.BigEndian
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1264 default:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1265 return fmt.Errorf("unknown byte order %x", endian)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1266 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1267
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1268 var geomType uint32
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1269 err = binary.Read(r, order, &geomType)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1270
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1271 switch {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1272 case err != nil:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1273 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1274 case geomType != wkb.MultiPointZ:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1275 return fmt.Errorf("unknown geometry type %x", geomType)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1276 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1277
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1278 var numPoints uint32
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1279 if err := binary.Read(r, order, &numPoints); err != nil {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1280 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1281 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1282
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1283 points := make(MultiPointZ, numPoints)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1284
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1285 for i := range points {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1286 endian, err = r.ReadByte()
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1287
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1288 switch {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1289 case err != nil:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1290 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1291 case endian == wkb.NDR:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1292 order = binary.LittleEndian
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1293 case endian == wkb.XDR:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1294 order = binary.BigEndian
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1295 default:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1296 return fmt.Errorf("unknown byte order %x", endian)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1297 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1298
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1299 err = binary.Read(r, order, &geomType)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1300
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1301 switch {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1302 case err != nil:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1303 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1304 case geomType != wkb.PointZ:
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1305 return fmt.Errorf("unknown geometry type %x", geomType)
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1306 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1307
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1308 var x, y, z uint64
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1309 if err = binary.Read(r, order, &x); err != nil {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1310 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1311 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1312 if err = binary.Read(r, order, &y); err != nil {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1313 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1314 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1315 if err = binary.Read(r, order, &z); err != nil {
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1316 return err
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1317 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1318 points[i] = Vertex{
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1319 X: math.Float64frombits(x),
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1320 Y: math.Float64frombits(y),
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1321 Z: math.Float64frombits(z),
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1322 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1323 }
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1324
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1325 *mpz = points
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1326
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1327 return nil
45d51a49f191 SR import: Use own triangulation and clipping when importing sounding results. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2512 diff changeset	1328 }

Mercurial > gemma

annotate pkg/mesh/vertex.go @ 5736:55892008ec96 default tip