gemma: pkg/octree/strtree.go annotate

annotate pkg/octree/strtree.go @ 4640:fb09a43b062e

Decouple the tracing of the iso areas from the octree data structure.

author	Sascha L. Teichmann <teichmann@intevation.de>
date	Fri, 11 Oct 2019 20:09:37 +0200
parents	680f1d8802f0
children	5ef04ae34872

rev	line source
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	1 // This is Free Software under GNU Affero General Public License v >= 3.0
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	2 // without warranty, see README.md and license for details.
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	3 //
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	4 // SPDX-License-Identifier: AGPL-3.0-or-later
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	5 // License-Filename: LICENSES/AGPL-3.0.txt
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	6 //
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	7 // Copyright (C) 2018 by via donau
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	8 // – Österreichische Wasserstraßen-Gesellschaft mbH
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	9 // Software engineering by Intevation GmbH
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	10 //
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	11 // Author(s):
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	13
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	14 package octree
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	15
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	16 import (
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	17 "math"
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	18 "sort"
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	19 )
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	20
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	21 const STRTreeDefaultEntries = 8
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	22
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	23 type STRTree struct {
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	24 Entries int
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	25 tin *Tin
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	26 index []int32
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	27 bboxes []Box2D
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	28 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	29
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	30 func (s STRTree) Build(t Tin) {
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	31
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	32 if s.Entries == 0 {
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	33 s.Entries = STRTreeDefaultEntries
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	34 }
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	35
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	36 s.tin = t
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	37
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	38 all := make([]int32, len(t.Triangles))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	39
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	40 for i := range all {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	41 all[i] = int32(i)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	42 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	43
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	44 s.index = append(s.index, 0)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	45
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	46 root := s.build(all)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	47
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	48 s.index[0] = root
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	49 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	50
4592 680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	51 func (s STRTree) BuildWithout(t Tin, remove map[int32]struct{}) {
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	52
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	53 if s.Entries == 0 {
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	54 s.Entries = STRTreeDefaultEntries
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	55 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	56
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	57 s.tin = t
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	58
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	59 all := make([]int32, 0, len(t.Triangles)-len(remove))
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	60
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	61 for i := range all {
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	62 idx := int32(i)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	63 if _, found := remove[idx]; !found {
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	64 all = append(all, idx)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	65 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	66 all[i] = int32(i)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	67 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	68
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	69 s.index = append(s.index, 0)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	70
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	71 root := s.build(all)
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	72
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	73 s.index[0] = root
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	74 }
680f1d8802f0 STRTree: Add a builder that ignores triangles which are filtered out before. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 4591 diff changeset	75
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	76 func (s STRTree) Clip(p Polygon) map[int32]struct{} {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	77
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	78 removed := make(map[int32]struct{})
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	79
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	80 stack := []int32{s.index[0]}
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	81
2521 e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	82 vertices := s.tin.Vertices
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	83
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	84 for len(stack) > 0 {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	85 top := stack[len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	86 stack = stack[:len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	87
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	88 if top > 0 { // node
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	89 switch p.IntersectionBox2D(s.bbox(top)) {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	90 case IntersectionInside:
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	91 // all triangles are inside polygon
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	92 case IntersectionOutSide:
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	93 // all triangles are outside polygon
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	94 s.allTriangles(top, removed)
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	95 default:
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	96 // mixed bag
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	97 for i, n := int32(0), s.index[top+1]; i < n; i++ {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	98 stack = append(stack, s.index[top+2+i])
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	99 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	100 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	101 } else { // leaf
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	102 top = -top - 1
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	103 for i, n := int32(0), s.index[top+1]; i < n; i++ {
2521 e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	104 idx := s.index[top+2+i]
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	105 ti := s.tin.Triangles[idx]
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	106 t := Triangle{
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	107 vertices[ti[0]],
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	108 vertices[ti[1]],
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	109 vertices[ti[2]],
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	110 }
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	111 if p.IntersectionWithTriangle(&t) != IntersectionInside {
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	112 removed[idx] = struct{}{}
e26000628764 Clip triangle in STR tree leaves correctly. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2516 diff changeset	113 }
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	114 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	115 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	116 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	117
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	118 return removed
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	119 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	120
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	121 func (s *STRTree) allTriangles(pos int32, tris map[int32]struct{}) {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	122 stack := []int32{pos}
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	123 for len(stack) > 0 {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	124 top := stack[len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	125 stack = stack[:len(stack)-1]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	126 if top > 0 { // node
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	127 for i, n := int32(0), s.index[top+1]; i < n; i++ {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	128 stack = append(stack, s.index[top+2+i])
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	129 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	130 } else { // leaf
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	131 top = -top - 1
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	132 for i, n := int32(0), s.index[top+1]; i < n; i++ {
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	133 tris[s.index[top+2+i]] = struct{}{}
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	134 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	135 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	136 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	137 }
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	138
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	139 func (s *STRTree) build(items []int32) int32 {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	140 sort.Slice(items, func(i, j int) bool {
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	141 ti := s.tin.Triangles[items[i]]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	142 tj := s.tin.Triangles[items[j]]
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	143 return s.tin.Vertices[ti[0]].X < s.tin.Vertices[tj[0]].X
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	144 })
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	145
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	146 P := int(math.Ceil(float64(len(items)) / float64(s.Entries)))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	147 S := int(math.Ceil(math.Sqrt(float64(P))))
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	148
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	149 slices := s.strSplit(items, S)
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	150
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	151 leaves := s.strJoin(
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	152 slices, S,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	153 func(i, j int32) bool {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	154 ti := s.tin.Triangles[i]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	155 tj := s.tin.Triangles[j]
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	156 return s.tin.Vertices[ti[0]].Y < s.tin.Vertices[tj[0]].Y
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	157 },
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	158 s.allocLeaf,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	159 )
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	160
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	161 return s.buildNodes(leaves)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	162 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	163
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	164 func (s *STRTree) buildNodes(items []int32) int32 {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	165
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	166 if len(items) <= s.Entries {
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	167 return s.allocNode(items)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	168 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	169
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	170 sort.Slice(items, func(i, j int) bool {
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	171 return s.bbox(items[i]).X1 < s.bbox(items[j]).X1
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	172 })
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	173
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	174 P := int(math.Ceil(float64(len(items)) / float64(s.Entries)))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	175 S := int(math.Ceil(math.Sqrt(float64(P))))
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	176
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	177 slices := s.strSplit(items, S)
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	178
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	179 nodes := s.strJoin(
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	180 slices, S,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	181 func(i, j int32) bool { return s.bbox(i).Y1 < s.bbox(j).Y1 },
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	182 s.allocNode,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	183 )
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	184
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	185 return s.buildNodes(nodes)
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	186 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	187
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	188 func (s *STRTree) bbox(idx int32) Box2D {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	189 if idx < 0 { // Don't care if leaf or node.
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	190 idx = -idx - 1
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	191 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	192 return s.bboxes[s.index[idx]]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	193 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	194
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	195 func (s *STRTree) strSplit(items []int32, S int) [][]int32 {
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	196 sm := S * s.Entries
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	197 slices := make([][]int32, S)
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	198 for i := range slices {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	199 var n int
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	200 if l := len(items); l < sm {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	201 n = l
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	202 } else {
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	203 n = sm
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	204 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	205 slices[i] = items[:n]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	206 items = items[n:]
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	207 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	208 return slices
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	209 }
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	210
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	211 func (s *STRTree) strJoin(
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	212 slices [][]int32, S int,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	213 less func(int32, int32) bool,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	214 alloc func([]int32) int32,
114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	215 ) []int32 {
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	216 nodes := make([]int32, 0, S*S)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	217
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	218 for _, slice := range slices {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	219 sort.Slice(slice, func(i, j int) bool {
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	220 return less(slice[i], slice[j])
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	221 })
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	222
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	223 for len(slice) > 0 {
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	224 var n int
4591 f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	225 if l := len(slice); l >= s.Entries {
f456ce0a6a0e STRTree: Made number of entries per node a parameter. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2565 diff changeset	226 n = s.Entries
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	227 } else {
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	228 n = l
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	229 }
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	230 nodes = append(nodes, alloc(slice[:n]))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	231 slice = slice[n:]
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	232 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	233 }
2565 114979e97a6c STR tree: More code simplification. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2564 diff changeset	234 return nodes
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	235 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	236
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	237 func (s *STRTree) allocNode(items []int32) int32 {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	238 pos := len(s.index)
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	239 s.index = append(s.index, 0, int32(len(items)))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	240 s.index = append(s.index, items...)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	241 if len(items) > 0 {
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	242 box := s.bbox(items[0])
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	243 for i := 1; i < len(items); i++ {
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	244 box = box.Union(s.bbox(items[i]))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	245 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	246 s.index[pos] = int32(s.allocBBox(box))
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	247 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	248 return int32(pos)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	249 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	250
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	251 func (s *STRTree) allocBBox(box Box2D) int {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	252 pos := len(s.bboxes)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	253 s.bboxes = append(s.bboxes, box)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	254 return pos
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	255 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	256
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	257 func (s *STRTree) allocLeaf(items []int32) int32 {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	258 pos := len(s.index)
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	259 s.index = append(s.index, 0, int32(len(items)))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	260 s.index = append(s.index, items...)
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	261 if len(items) > 0 {
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	262 vertices := s.tin.Vertices
1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	263 ti := s.tin.Triangles[items[0]]
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	264 t := Triangle{
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	265 vertices[ti[0]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	266 vertices[ti[1]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	267 vertices[ti[2]],
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	268 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	269 box := t.BBox()
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	270 for i := 1; i < len(items); i++ {
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	271 it := items[i]
2516 1ec4c5633eb6 Clip STR tree and not Octree. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2515 diff changeset	272 ti := s.tin.Triangles[it]
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	273 t := Triangle{
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	274 vertices[ti[0]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	275 vertices[ti[1]],
6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	276 vertices[ti[2]],
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	277 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	278 box = box.Union(t.BBox())
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	279 }
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	280 s.index[pos] = int32(s.allocBBox(box))
2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	281 }
2515 6bcaa8bf2603 STR tree: Fixed sorting. Stored num items per nodes. Simpified code. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 2513 diff changeset	282 return int32(-(pos + 1))
2512 2768f74d54ab Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	283 }

Mercurial > gemma

annotate pkg/octree/strtree.go @ 4640:fb09a43b062e