gemma: pkg/octree/vertex.go annotate

annotate pkg/octree/vertex.go @ 787:3d927e06b92c

Triangle intersection. WIP. Currently interpolation is messed up.

author	Sascha L. Teichmann <sascha.teichmann@intevation.de>
date	Wed, 26 Sep 2018 18:36:12 +0200
parents	9be20bd0f131
children	9f3a4a60dc04

rev	line source
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	1 package octree
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	2
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	3 import (
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	4 "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	5 "encoding/binary"
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	6 "io"
763 d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	7 "log"
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	8 "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	9 "sort"
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	10 )
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	11
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	12 type (
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	13 Vertex struct {
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	14 X float64
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	15 Y float64
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	16 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	17 }
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
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	19 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	20
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 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	22
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	23 LineStringZ []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	24 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	25
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	26 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	27 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	28 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	29 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	30 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	31 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	32
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	33 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	34 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	35 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	36 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	37 }
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	38 )
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	39
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	40 const (
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	41 wkbNDR byte = 1
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	42 wkbPointZ uint32 = 1000 + 1
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	43 wkbLineStringZ uint32 = 1000 + 2
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	44 wkbMultiLineStringZ uint32 = 1000 + 5
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	45 )
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	46
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 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	48 if w.X < v.X {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	49 v.X = w.X
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	50 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	51 if w.Y < v.Y {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	52 v.Y = w.Y
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	53 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	54 if w.Z < v.Z {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	55 v.Z = w.Z
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	56 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	57 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	58
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 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	60 if w.X > v.X {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	61 v.X = w.X
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	62 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	63 if w.Y > v.Y {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	64 v.Y = w.Y
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	65 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	66 if w.Z > v.Z {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	67 v.Z = w.Z
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	68 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	69 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	70
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	71 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	72 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	73 v.X - w.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	74 v.Y - w.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	75 v.Z - w.Z,
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	76 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	77 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	78
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	79 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	80 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	81 v.X + w.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	82 v.Y + w.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	83 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	84 }
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	85 }
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	86
730 4c05bdbf8e4b Renamed scale in Vertex to uppercase to make it public. Sascha L. Teichmann <teichmann@intevation.de> parents: 729 diff changeset	87 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	88 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	89 s * v.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	90 s * v.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	91 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	92 }
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	93 }
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	94
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	95 func Interpolate(v1, v2 Vertex) func(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	96 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	97 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	98 return Vertex{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	99 v2.X*s.X + v1.X,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	100 v2.Y*s.Y + v1.Y,
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	101 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	102 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	103 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	104 }
120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	105
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	106 func (a Vertex) Less(b Vertex) bool {
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	107 return a.X < b.X \|\| a.Y < b.Y \|\| a.Z < b.Z
674 120a82bd9953 octree: Added loading frame for contour generation. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	108 }
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	109
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	110 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	111 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	112 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	113 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	114 }
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	115 }
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	116
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	117 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	118 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	119 }
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	120
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	121 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	122 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	123 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	124 }
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	125
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	126 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	127 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	128 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	129 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	130 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	131 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	132 }
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	133 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	134 }
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	135
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	136 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	137 sides := [3]int{
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	138 side(t[0].Z, h),
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	139 side(t[1].Z, h),
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	140 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	141 }
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	142
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	143 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	144
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	145 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	146 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	147 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	148 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	149
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	150 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	151 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	152 // 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	153 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	154 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	155 // 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	156 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	157 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	158 // 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	159 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	160 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	161 // 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	162 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	163 // 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	164 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	165 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	166 }
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	167 }
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	168
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	169 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	170 }
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	171
763 d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	172 func (t *Triangle) IntersectVertical(x1, y1, x2, y2 float64) LineStringZ {
d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	173 // TODO: Implement me!
d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	174 log.Println("Triangle.IntersectVertical is not implemented, yet!")
d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	175 return nil
d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	176 }
d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	177
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	178 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	179 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	180 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	181
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	182 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	183 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	184 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	185 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	186 }
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	187 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	188 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	189 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	190 }
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	191 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	192 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	193 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	194 }
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	195 }
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	196 }
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	197
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	198 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	199 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	200 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	201 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	202 }
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	203 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	204 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	205 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	206 }
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	207 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	208 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	209 })
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	210 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	211 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	212 }
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	213 }
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	214
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	215 func (v Vertex) EpsEquals(w Vertex) bool {
769 ba2007b746ef Fixed nasty typo. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 768 diff changeset	216 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	217 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	218 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	219 }
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	220
763 d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	221 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	222
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	223 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	224
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	225 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	226 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	227 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	228 }
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	229
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	230 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	231
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	232 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	233 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	234 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	235 }
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	236 // 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	237 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	238 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	239 }
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	240
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	241 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	242 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	243 })
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	244
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	245 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	246
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	247 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	248 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	249 if l := len(out); l > 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	250 if last := out[l-1]; last[len(last)-1].EpsEquals(curr[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	251 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	252 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	253 }
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	254 }
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	255 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	256 }
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	257
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	258 return out
763 d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	259 }
d05bc3e34338 More infrastructure for the octree driven cross section endpoint. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 730 diff changeset	260
729 b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	261 func (v *Vertex) Write(w io.Writer) error {
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	262 if err := binary.Write(
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	263 w, binary.LittleEndian, math.Float64bits(v.X)); err != nil {
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	264 return err
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	265 }
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	266 if err := binary.Write(
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	267 w, binary.LittleEndian, math.Float64bits(v.Y)); err != nil {
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	268 return err
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	269 }
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	270 return binary.Write(
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	271 w, binary.LittleEndian, math.Float64bits(v.Z))
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	272 }
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	273
b0bd242ff821 Removed vertex duplicate. Sascha L. Teichmann <teichmann@intevation.de> parents: 727 diff changeset	274 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	275 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	276 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	277 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	278 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	279 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	280 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	281 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	282 return nil
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	283 }
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	284 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	285 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	286 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	287 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	288 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	289 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	290 }
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	291
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	292 func (mls MultiLineStringZ) AsWKB() []byte {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	293
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	294 var buf bytes.Buffer
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	295
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	296 binary.Write(&buf, binary.LittleEndian, wkbNDR)
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	297 binary.Write(&buf, binary.LittleEndian, wkbMultiLineStringZ)
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	298 binary.Write(&buf, binary.LittleEndian, uint32(len(mls)))
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	299
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	300 for _, ml := range mls {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	301 binary.Write(&buf, binary.LittleEndian, wkbNDR)
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	302 binary.Write(&buf, binary.LittleEndian, wkbLineStringZ)
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	303 binary.Write(&buf, binary.LittleEndian, uint32(len(ml)))
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	304 for _, p := range ml {
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	305 binary.Write(&buf, binary.LittleEndian, math.Float64bits(p.X))
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	306 binary.Write(&buf, binary.LittleEndian, math.Float64bits(p.Y))
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	307 binary.Write(&buf, binary.LittleEndian, math.Float64bits(p.Z))
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	308 }
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	309 }
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	310
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	311 return buf.Bytes()
41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 726 diff changeset	312 }
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	313
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	314 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	315 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	316 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	317 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	318
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	319 func (a Box2D) Mid() (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	320 return (a.X2-a.X1)0.5 + a.X1, (a.Y2-a.Y1)0.5 + 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	321 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	322
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	323 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	324 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	325 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	326 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	327 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	328 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	329
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	330 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	331 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	332 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	333 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	334 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	335 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	336
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	337 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	338 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	339 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	340
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	341 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	342 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	343 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	344
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	345 // 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	346 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	347 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	348 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	349
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	350 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	351 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	352 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	353
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	354 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	355
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	356 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	357 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	358 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	359 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	360 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	361 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	362
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	363 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	364 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	365 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	366 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	367 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	368 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	369 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	370 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	371 //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	372 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	373 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	374 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	375 //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	376 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	377 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	378 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	379 }
c55771b7c502 Moved Box2D and Plane2D into vertex.go and made to API public. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 769 diff changeset	380 //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	381 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	382 }
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	383
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	384 func (a Vertex) Cross(b Vertex) Vertex {
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	385 return Vertex{
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	386 a.Yb.Z - a.Zb.Y,
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	387 a.Zb.X - a.Xb.Z,
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	388 a.Xb.Y - a.Yb.X,
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	389 }
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	390 }
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	391
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	392 func (p1 Plane2D) Intersection(p2 Plane2D) (float64, float64, bool) {
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	393
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	394 u1 := Vertex{p1.A, p1.B, p1.C}
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	395 u2 := Vertex{p2.A, p2.B, p2.C}
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	396
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	397 p := u1.Cross(u2)
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	398
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	399 if p.Z == 0 {
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	400 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	401 }
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	402
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	403 return p.X / p.Z, p.Y / p.Z, true
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	404 }
787 3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	405
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	406 type VerticalLine struct {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	407 x1 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	408 y1 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	409 x2 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	410 y2 float64
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	411
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	412 line Plane2D
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	413 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	414
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	415 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	416 return &VerticalLine{
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	417 x1: x1,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	418 y1: y1,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	419 x2: x2,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	420 y2: y2,
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	421 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	422 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	423 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	424
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	425 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	426
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	427 func dist(x1, y1, x2, y2 float64) float64 {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	428 return math.Sqrt((x1-x2)(x1-x2) + (y1-y2)(y1-y2))
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	429 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	430
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	431 func interpolate(v1, v2 Vertex) func(x, y float64) float64 {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	432
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	433 length := dist(v1.X, v1.Y, v2.X, v2.Y)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	434
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	435 // f(0) = v1.Z
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	436 // f(length) = v2.Z
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	437 // v1.Z = 0*m + b
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	438 // v2.Z = length*m + b
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	439
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	440 b := v1.Z
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	441 m := (v2.Z - v1.Z) / length
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	442
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	443 return func(x, y float64) float64 {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	444 l := dist(v1.X, v1.Y, x, y)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	445 return m*l + b
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	446 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	447 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	448
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	449 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	450 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	451 return Vertex{
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	452 (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	453 (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	454 (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	455 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	456 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	457 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	458
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	459 func inRange(a, b, c float64) bool {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	460 if a > b {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	461 a, b = b, a
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	462 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	463 return c >= a && c <= b
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	464 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	465
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	466 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	467
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	468 var out LineStringZ
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	469
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	470 length := dist(vl.x1, vl.y1, vl.x2, vl.y2)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	471
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	472 edges:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	473 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	474 j := (i + 1) % 3
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	475 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	476
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	477 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	478 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	479
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	480 o1 := onPlane(s1)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	481 o2 := onPlane(s2)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	482
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	483 switch {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	484 case o1 && o2:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	485 // XXX: Broken!
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	486 pos := interpolate(t[i], t[j])
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	487 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	488 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	489
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	490 r1 := inRange(0, length, t1)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	491 r2 := inRange(0, length, t2)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	492
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	493 switch {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	494 case r1 && r2:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	495 l := linear(t[i], t[j])
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	496 // XXX: Broken!
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	497 out = append(out, l(t1/length), l(t2/length))
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	498 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	499
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	500 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	501 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	502 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	503 case !r1:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	504 // TODO
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	505 case !r2:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	506 // TODO
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	507 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	508
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	509 case o1:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	510 t1 := interpolate(t[i], t[j])(vl.x1, vl.y1)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	511 if !inRange(0, length, t1) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	512 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	513 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	514 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	515
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	516 case o2:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	517 t2 := interpolate(t[i], t[j])(vl.x2, vl.y2)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	518 if !inRange(0, length, t2) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	519 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	520 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	521 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	522
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	523 default:
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	524 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	525 if !intersects {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	526 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	527 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	528 t1 := interpolate(t[i], t[j])(x, y)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	529 if !inRange(0, length, t1) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	530 continue edges
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	531 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	532
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	533 // XXX: Ugly!
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	534 z := (t[j].Z-t[i].Z)*(t1/length) + t[1].Z
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	535 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	536
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	537 if math.Signbit(s1) != math.Signbit(s2) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	538 // different sides -> vertex on edge.
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	539 out = append(out)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	540 } 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	541 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	542 out = append(out, n)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	543 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	544 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	545
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	546 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	547 if k == i {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	548 continue
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	549 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	550 l := (k + 1) % 3
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	551 other := NewPlane2D(t[k].X, t[k].Y, t[l].X, t[l].Y)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	552 xo, yo, 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	553 if !intersects {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	554 continue
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	555 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	556 // XXX: Broken!!!
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	557 zo := interpolate(t[k], t[j])(xo, yo)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	558 if !inRange(t[k].Z, t[k].Z, zo) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	559 continue
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	560 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	561 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	562
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	563 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	564
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	565 // 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	566 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	567 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	568 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	569 } else {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	570 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	571 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	572 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	573
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	574 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	575 // 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	576 // treat as no intersection
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	577 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	578 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	579
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	580 // XXX: Broken!!!
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	581 zint := interpolate(n, m)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	582
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	583 zn := zint(xn, yn)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	584 zf := zint(xf, yf)
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	585
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	586 if !inRange(n.Z, m.Z, zn) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	587 // 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	588 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	589 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	590
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	591 if inRange(n.Z, m.Z, zf) {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	592 m.X = xf
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	593 m.Y = yf
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	594 m.Z = zf
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	595 } // else m is clipping
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	596
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	597 n.X = xn
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	598 n.Y = yn
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	599 n.Z = zn
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	600
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	601 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	602 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	603 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	604 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	605 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	606 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	607
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	608 // supress single point touches.
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	609 if len(out) == 1 {
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	610 out = out[:0]
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	611 }
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	612
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	613 return out
3d927e06b92c Triangle intersection. WIP. Currently interpolation is messed up. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 778 diff changeset	614 }

Mercurial > gemma

annotate pkg/octree/vertex.go @ 787:3d927e06b92c