gemma: pkg/mesh/strtree.go annotate

annotate pkg/mesh/strtree.go @ 5415:4ad68ab239b7 marking-single-beam

Factored creation of default class breaks in SR import to be reused with markings, too.

author	Sascha L. Teichmann <sascha.teichmann@intevation.de>
date	Wed, 07 Jul 2021 12:01:28 +0200
parents	01b593ea2311
children	5f47eeea988d

rev	line source
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: diff changeset	1 // This is Free Software under GNU Affero General Public License v >= 3.0
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: diff changeset	2 // without warranty, see README.md and license for details.
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: diff changeset	3 //
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: diff changeset	4 // SPDX-License-Identifier: AGPL-3.0-or-later
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: diff changeset	5 // License-Filename: LICENSES/AGPL-3.0.txt
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: diff changeset	6 //
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: diff changeset	7 // Copyright (C) 2018 by via donau
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: diff changeset	8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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: diff changeset	9 // Software engineering by Intevation GmbH
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: diff changeset	10 //
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: diff changeset	11 // Author(s):
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: diff changeset	12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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: 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
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: diff changeset	15
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: diff changeset	16 import (
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	17 "bytes"
4652 f5492fda097c Use gzip best speed instead of lz4. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4650 diff changeset	18 "compress/gzip"
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	19 "encoding/binary"
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	20 "io"
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	21 "log"
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: diff changeset	22 "math"
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: diff changeset	23 "sort"
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: diff changeset	24 )
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: diff changeset	25
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	26 // STRTreeDefaultEntries is the default number of children per node and leaf.
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	27 const STRTreeDefaultEntries = 8
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: diff changeset	28
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	29 // STRTree is a Sort Tile Recurse tree.
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: diff changeset	30 type STRTree struct {
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	31 // Entries is the total number of entries.
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	32 Entries int
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	33 // tin is a reference to the TIN this tree is build from.
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	34 tin *Tin
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	35 // index is the internal tree representation.
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	36 index []int32
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	37 // bboxes are the bounding boxes used in nodes and leaves.
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	38 bboxes []Box2D
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: diff changeset	39 }
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: diff changeset	40
4658 4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	41 // Vertical does a vertical cross cut from (x1, y1) to (x2, y2).
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	42 func (s STRTree) Vertical(x1, y1, x2, y2 float64, fn func(Triangle)) {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	43 box := Box2D{
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	44 X1: math.Min(x1, x2),
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	45 Y1: math.Min(y1, y2),
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	46 X2: math.Max(x1, x2),
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	47 Y2: math.Max(y1, y2),
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	48 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	49
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	50 // out of bounding box
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	51 if box.X2 < s.tin.Min.X \|\| s.tin.Max.X < box.X1 \|\|
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	52 box.Y2 < s.tin.Min.Y \|\| s.tin.Max.Y < box.Y1 {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	53 return
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	54 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	55
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	56 line := NewPlane2D(x1, y1, x2, y2)
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	57
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	58 vertices := s.tin.Vertices
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	59
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	60 stack := []int32{s.index[0]}
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	61
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	62 for len(stack) > 0 {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	63 top := stack[len(stack)-1]
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	64 stack = stack[:len(stack)-1]
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	65
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	66 if top > 0 { // node
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	67 if b := s.bbox(top); b.Intersects(box) && b.IntersectsPlane(line) {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	68 n := s.index[top+1]
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	69 stack = append(stack, s.index[top+2:top+2+n]...)
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	70 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	71 } else { // leaf
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	72 top = -top - 1
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	73 if b := s.bbox(top); !b.Intersects(box) \|\| !b.IntersectsPlane(line) {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	74 continue
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	75 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	76 n := s.index[top+1]
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	77 for _, idx := range s.index[top+2 : top+2+n] {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	78 ti := s.tin.Triangles[idx]
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	79 t := Triangle{
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	80 vertices[ti[0]],
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	81 vertices[ti[1]],
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	82 vertices[ti[2]],
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	83 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	84 v0 := line.Eval(t[0].X, t[0].Y)
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	85 v1 := line.Eval(t[1].X, t[1].Y)
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	86 v2 := line.Eval(t[2].X, t[2].Y)
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	87
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	88 if onPlane(v0) \|\| onPlane(v1) \|\| onPlane(v2) \|\|
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	89 sides(sides(sides(0, v0), v1), v2) == 3 {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	90 fn(&t)
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	91 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	92 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	93 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	94 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	95 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	96
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	97 // Min return the minimum vertex of the TIN this tree is build from.
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	98 func (s *STRTree) Min() Vertex { return s.tin.Min }
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	99
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	100 // Max return the maximum vertex of the TIN this tree is build from.
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	101 func (s *STRTree) Max() Vertex { return s.tin.Max }
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	102
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	103 // EPSG return the EPSF code of the TIN this tree is build from.
4654 3eda5a7215ab Generate STRTrees instaead of Octree during sounding result imports. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4652 diff changeset	104 func (s *STRTree) EPSG() uint32 { return s.tin.EPSG }
3eda5a7215ab Generate STRTrees instaead of Octree during sounding result imports. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4652 diff changeset	105
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	106 // Value returns the Z Value for a given X/Y point.
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	107 // Second return value is false if the point is out of bound.
4641 5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	108 func (s *STRTree) Value(x, y float64) (float64, bool) {
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	109
4658 4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	110 if len(s.index) == 0 {
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	111 return 0, false
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	112 }
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	113
4641 5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	114 stack := []int32{s.index[0]}
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	115
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	116 vertices := s.tin.Vertices
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	117
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	118 for len(stack) > 0 {
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	119 top := stack[len(stack)-1]
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	120 stack = stack[:len(stack)-1]
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	121
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	122 if top > 0 { // node
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	123 if s.bbox(top).Contains(x, y) {
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	124 n := s.index[top+1]
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	125 stack = append(stack, s.index[top+2:top+2+n]...)
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	126 }
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	127 } else { // leaf
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	128 top = -top - 1
4645 946689a56fc2 Forgot a bbox check when evaluating STRTree speeding it significantly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	129 if !s.bbox(top).Contains(x, y) {
946689a56fc2 Forgot a bbox check when evaluating STRTree speeding it significantly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	130 continue
946689a56fc2 Forgot a bbox check when evaluating STRTree speeding it significantly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	131 }
4658 4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	132 n := s.index[top+1]
4bbfe3dd2ab5 Completed usage of STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4654 diff changeset	133 for _, idx := range s.index[top+2 : top+2+n] {
4641 5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	134 ti := s.tin.Triangles[idx]
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	135 t := Triangle{
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	136 vertices[ti[0]],
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	137 vertices[ti[1]],
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	138 vertices[ti[2]],
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	139 }
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	140 if t.Contains(x, y) {
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	141 return t.Plane3D().Z(x, y), true
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	142 }
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	143 }
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	144 }
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	145 }
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	146 return 0, false
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	147 }
5ef04ae34872 Used STRTree for caluculating the diff. Sascha L. Teichmann <teichmann@intevation.de> parents: 4592 diff changeset	148
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	149 // Build builds a tree for a given TIN.
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	150 func (s STRTree) Build(t Tin) {
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: diff changeset	151
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	152 if s.Entries == 0 {
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	153 s.Entries = STRTreeDefaultEntries
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	154 }
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	155
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	156 s.tin = t
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: diff changeset	157
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	158 all := make([]int32, len(t.Triangles))
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: diff changeset	159
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: diff changeset	160 for i := range all {
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: diff changeset	161 all[i] = int32(i)
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: diff changeset	162 }
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: diff changeset	163
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: diff changeset	164 s.index = append(s.index, 0)
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: diff changeset	165
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: diff changeset	166 root := s.build(all)
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: diff changeset	167
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: diff changeset	168 s.index[0] = root
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: diff changeset	169 }
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: diff changeset	170
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	171 // BuildWithout builds a tree for a given TIN ignoring the triangles
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	172 // with the indices given in the remove map.
4592 680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	173 func (s STRTree) BuildWithout(t Tin, remove map[int32]struct{}) {
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	174
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	175 if s.Entries == 0 {
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	176 s.Entries = STRTreeDefaultEntries
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	177 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	178
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	179 s.tin = t
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	180
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	181 all := make([]int32, 0, len(t.Triangles)-len(remove))
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	182
4642 b5d9647c5bc1 Fixed construction of clipped STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4641 diff changeset	183 for i := 0; i < len(t.Triangles); i++ {
4592 680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	184 idx := int32(i)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	185 if _, found := remove[idx]; !found {
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	186 all = append(all, idx)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	187 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	188 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	189
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	190 s.index = append(s.index, 0)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	191
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	192 root := s.build(all)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	193
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	194 s.index[0] = root
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	195 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	196
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	197 // Clip returns the indices of the triangles of the TIN
01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	198 // which are not fully covered by the given polygon.
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	199 func (s STRTree) Clip(p Polygon) map[int32]struct{} {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	200
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	201 removed := make(map[int32]struct{})
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	202
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	203 stack := []int32{s.index[0]}
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	204
2521 e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	205 vertices := s.tin.Vertices
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	206
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	207 for len(stack) > 0 {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	208 top := stack[len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	209 stack = stack[:len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	210
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	211 if top > 0 { // node
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	212 switch p.IntersectionBox2D(s.bbox(top)) {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	213 case IntersectionInside:
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	214 // all triangles are inside polygon
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	215 case IntersectionOutSide:
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	216 // all triangles are outside polygon
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	217 s.allTriangles(top, removed)
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	218 default:
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	219 // mixed bag
4643 a1a9b1eab57c Use append/slicing trick to simplify tree traversals. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4642 diff changeset	220 n := s.index[top+1]
a1a9b1eab57c Use append/slicing trick to simplify tree traversals. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4642 diff changeset	221 stack = append(stack, s.index[top+2:top+2+n]...)
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	222 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	223 } else { // leaf
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	224 top = -top - 1
4703 6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	225 switch p.IntersectionBox2D(s.bbox(top)) {
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	226 case IntersectionInside:
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	227 // all triangles are inside polygon
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	228 case IntersectionOutSide:
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	229 // all triangles are outside polygon
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	230 n := s.index[top+1]
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	231 for _, idx := range s.index[top+2 : top+2+n] {
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	232 removed[idx] = struct{}{}
2521 e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	233 }
4703 6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	234 default:
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	235 n := s.index[top+1]
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	236 for _, idx := range s.index[top+2 : top+2+n] {
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	237 ti := s.tin.Triangles[idx]
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	238 t := Triangle{
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	239 vertices[ti[0]],
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	240 vertices[ti[1]],
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	241 vertices[ti[2]],
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	242 }
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	243 if p.IntersectionWithTriangle(&t) != IntersectionInside {
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	244 removed[idx] = struct{}{}
6e179b338f1a STRTree: Improve usage of bounding boxes in leaves of the tree. Speeds stuff 10x up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4658 diff changeset	245 }
2521 e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	246 }
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	247 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	248 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	249 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	250
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	251 return removed
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	252 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	253
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	254 func (s *STRTree) serializeIndex(w io.Writer) error {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	255
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	256 if err := binary.Write(w, binary.LittleEndian, int32(len(s.index))); err != nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	257 return err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	258 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	259
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	260 var buf [binary.MaxVarintLen32]byte
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	261
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	262 var last int32
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	263 var written int
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	264
4650 f5fce22184da Added a deserializer from STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4647 diff changeset	265 for _, x := range s.index {
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	266 delta := x - last
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	267 n := binary.PutVarint(buf[:], int64(delta))
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	268 for p := buf[:n]; len(p) > 0; p = p[n:] {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	269 var err error
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	270 if n, err = w.Write(p); err != nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	271 return err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	272 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	273 written += n
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	274 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	275 last = x
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	276 }
4650 f5fce22184da Added a deserializer from STRTrees. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4647 diff changeset	277
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	278 log.Printf("info: compressed index in bytes: %d %.2f (%d %.2f)\n",
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	279 written,
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	280 float64(written)/(1024*1024),
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	281 4*len(s.index),
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	282 float64(4len(s.index))/(10241024),
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	283 )
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	284
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	285 return nil
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	286 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	287
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	288 func (s *STRTree) serializeBBoxes(w io.Writer) (rr error) {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	289
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	290 if err := binary.Write(w, binary.LittleEndian, int32(len(s.bboxes))); err != nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	291 return err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	292 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	293
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	294 var err error
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	295
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	296 write := func(v float64) {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	297 if err == nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	298 err = binary.Write(w, binary.LittleEndian, math.Float64bits(v))
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	299 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	300 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	301 for _, box := range s.bboxes {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	302 write(box.X1)
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	303 write(box.Y1)
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	304 write(box.X2)
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	305 write(box.Y2)
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	306 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	307
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	308 return err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	309 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	310
4855 01b593ea2311 Added missing doc strings for the STR tree in the mesh package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4827 diff changeset	311 // Bytes serializes this tree to a byte slice.
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	312 func (s *STRTree) Bytes() ([]byte, error) {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	313
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	314 var buf bytes.Buffer
4652 f5492fda097c Use gzip best speed instead of lz4. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4650 diff changeset	315 w, err := gzip.NewWriterLevel(&buf, gzip.BestSpeed)
f5492fda097c Use gzip best speed instead of lz4. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4650 diff changeset	316 if err != nil {
f5492fda097c Use gzip best speed instead of lz4. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4650 diff changeset	317 return nil, err
f5492fda097c Use gzip best speed instead of lz4. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4650 diff changeset	318 }
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	319
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	320 if err := s.tin.serialize(w); err != nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	321 return nil, err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	322 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	323
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	324 if err := binary.Write(w, binary.LittleEndian, uint8(s.Entries)); err != nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	325 return nil, err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	326 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	327
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	328 if err := s.serializeIndex(w); err != nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	329 return nil, err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	330 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	331
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	332 if err := s.serializeBBoxes(w); err != nil {
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	333 return nil, err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	334 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	335
4652 f5492fda097c Use gzip best speed instead of lz4. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4650 diff changeset	336 if err := w.Close(); err != nil {
4646 89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	337 return nil, err
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	338 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	339
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	340 return buf.Bytes(), nil
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	341 }
89a72e0e2f9b Add a method to serialize an STRTree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4643 diff changeset	342
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	343 func (s *STRTree) allTriangles(pos int32, tris map[int32]struct{}) {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	344 stack := []int32{pos}
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	345 for len(stack) > 0 {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	346 top := stack[len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	347 stack = stack[:len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	348 if top > 0 { // node
4643 a1a9b1eab57c Use append/slicing trick to simplify tree traversals. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4642 diff changeset	349 n := s.index[top+1]
a1a9b1eab57c Use append/slicing trick to simplify tree traversals. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4642 diff changeset	350 stack = append(stack, s.index[top+2:top+2+n]...)
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	351 } else { // leaf
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	352 top = -top - 1
4704 9eb708176b43 STRTree: more efficent usage of slicing in collecting triangles during clipping. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4703 diff changeset	353 n := s.index[top+1]
9eb708176b43 STRTree: more efficent usage of slicing in collecting triangles during clipping. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4703 diff changeset	354 for _, idx := range s.index[top+2 : top+2+n] {
9eb708176b43 STRTree: more efficent usage of slicing in collecting triangles during clipping. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4703 diff changeset	355 tris[idx] = struct{}{}
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	356 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	357 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	358 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	359 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	360
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: diff changeset	361 func (s *STRTree) build(items []int32) int32 {
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: diff changeset	362 sort.Slice(items, func(i, j int) bool {
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	363 ti := s.tin.Triangles[items[i]]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	364 tj := s.tin.Triangles[items[j]]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	365 return s.tin.Vertices[ti[0]].X < s.tin.Vertices[tj[0]].X
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: diff changeset	366 })
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: diff changeset	367
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	368 P := int(math.Ceil(float64(len(items)) / float64(s.Entries)))
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: diff changeset	369 S := int(math.Ceil(math.Sqrt(float64(P))))
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: diff changeset	370
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	371 slices := s.strSplit(items, S)
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: diff changeset	372
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	373 leaves := s.strJoin(
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	374 slices, S,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	375 func(i, j int32) bool {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	376 ti := s.tin.Triangles[i]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	377 tj := s.tin.Triangles[j]
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	378 return s.tin.Vertices[ti[0]].Y < s.tin.Vertices[tj[0]].Y
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	379 },
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	380 s.allocLeaf,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	381 )
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: diff changeset	382
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: diff changeset	383 return s.buildNodes(leaves)
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: diff changeset	384 }
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: diff changeset	385
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: diff changeset	386 func (s *STRTree) buildNodes(items []int32) int32 {
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: diff changeset	387
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	388 if len(items) <= s.Entries {
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: diff changeset	389 return s.allocNode(items)
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: diff changeset	390 }
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: diff changeset	391
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: diff changeset	392 sort.Slice(items, func(i, j int) bool {
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	393 return s.bbox(items[i]).X1 < s.bbox(items[j]).X1
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: diff changeset	394 })
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: diff changeset	395
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	396 P := int(math.Ceil(float64(len(items)) / float64(s.Entries)))
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: diff changeset	397 S := int(math.Ceil(math.Sqrt(float64(P))))
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: diff changeset	398
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	399 slices := s.strSplit(items, S)
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: diff changeset	400
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	401 nodes := s.strJoin(
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	402 slices, S,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	403 func(i, j int32) bool { return s.bbox(i).Y1 < s.bbox(j).Y1 },
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	404 s.allocNode,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	405 )
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	406
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	407 return s.buildNodes(nodes)
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	408 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	409
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	410 func (s *STRTree) bbox(idx int32) Box2D {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	411 if idx < 0 { // Don't care if leaf or node.
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	412 idx = -idx - 1
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	413 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	414 return s.bboxes[s.index[idx]]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	415 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	416
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	417 func (s *STRTree) strSplit(items []int32, S int) [][]int32 {
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	418 sm := S * s.Entries
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	419 slices := make([][]int32, S)
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	420 for i := range slices {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	421 var n int
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	422 if l := len(items); l < sm {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	423 n = l
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	424 } else {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	425 n = sm
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	426 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	427 slices[i] = items[:n]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	428 items = items[n:]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	429 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	430 return slices
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	431 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	432
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	433 func (s *STRTree) strJoin(
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	434 slices [][]int32, S int,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	435 less func(int32, int32) bool,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	436 alloc func([]int32) int32,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	437 ) []int32 {
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: diff changeset	438 nodes := make([]int32, 0, S*S)
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: diff changeset	439
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: diff changeset	440 for _, slice := range slices {
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: diff changeset	441 sort.Slice(slice, func(i, j int) bool {
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	442 return less(slice[i], slice[j])
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: diff changeset	443 })
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: diff changeset	444
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: diff changeset	445 for len(slice) > 0 {
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	446 var n int
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	447 if l := len(slice); l >= s.Entries {
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	448 n = s.Entries
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	449 } else {
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: diff changeset	450 n = l
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: diff changeset	451 }
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	452 nodes = append(nodes, alloc(slice[:n]))
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: diff changeset	453 slice = slice[n:]
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: diff changeset	454 }
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: diff changeset	455 }
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	456 return nodes
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: diff changeset	457 }
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: diff changeset	458
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: diff changeset	459 func (s *STRTree) allocNode(items []int32) int32 {
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: diff changeset	460 pos := len(s.index)
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	461 s.index = append(s.index, 0, int32(len(items)))
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: diff changeset	462 s.index = append(s.index, items...)
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: diff changeset	463 if len(items) > 0 {
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	464 box := s.bbox(items[0])
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: diff changeset	465 for i := 1; i < len(items); i++ {
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	466 box = box.Union(s.bbox(items[i]))
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: diff changeset	467 }
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: diff changeset	468 s.index[pos] = int32(s.allocBBox(box))
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: diff changeset	469 }
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: diff changeset	470 return int32(pos)
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: diff changeset	471 }
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: diff changeset	472
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: diff changeset	473 func (s *STRTree) allocBBox(box Box2D) int {
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: diff changeset	474 pos := len(s.bboxes)
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: diff changeset	475 s.bboxes = append(s.bboxes, box)
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: diff changeset	476 return pos
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: diff changeset	477 }
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: diff changeset	478
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: diff changeset	479 func (s *STRTree) allocLeaf(items []int32) int32 {
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: diff changeset	480 pos := len(s.index)
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	481 s.index = append(s.index, 0, int32(len(items)))
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: diff changeset	482 s.index = append(s.index, items...)
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: diff changeset	483 if len(items) > 0 {
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	484 vertices := s.tin.Vertices
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	485 ti := s.tin.Triangles[items[0]]
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: diff changeset	486 t := Triangle{
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	487 vertices[ti[0]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	488 vertices[ti[1]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	489 vertices[ti[2]],
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: diff changeset	490 }
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: diff changeset	491 box := t.BBox()
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: diff changeset	492 for i := 1; i < len(items); i++ {
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: diff changeset	493 it := items[i]
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	494 ti := s.tin.Triangles[it]
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: diff changeset	495 t := Triangle{
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	496 vertices[ti[0]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	497 vertices[ti[1]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	498 vertices[ti[2]],
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: diff changeset	499 }
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: diff changeset	500 box = box.Union(t.BBox())
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: diff changeset	501 }
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: diff changeset	502 s.index[pos] = int32(s.allocBBox(box))
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: diff changeset	503 }
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	504 return int32(-(pos + 1))
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: diff changeset	505 }

Mercurial > gemma

annotate pkg/mesh/strtree.go @ 5415:4ad68ab239b7 marking-single-beam