Mercurial > gemma

annotate cmd/tin2octree/tin.go @ 777:f27bfc57143b

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merge
author Bernhard Reiter <bernhard@intevation.de>
date Wed, 26 Sep 2018 12:44:22 +0200
parents b0bd242ff821
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package main
af1d4d44a88a Experimental tin octree indexer.
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2
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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3 import (
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4 "bytes"
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5 "encoding/binary"
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6 "errors"
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7 "fmt"
af1d4d44a88a Experimental tin octree indexer.
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8 "io"
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9 "log"
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10 "math"
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11
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12 "gemma.intevation.de/gemma/pkg/octree"
661
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13 )
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14
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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15 var (
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16 errNoByteSlice = errors.New("Not a byte slice")
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17 errTooLessPoints = errors.New("Too less points")
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18 )
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19
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20 const (
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21 wkbXDR byte = 0
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22 wkbNDR byte = 1
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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23 wkbTinZ uint32 = 1000 + 16
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24 wkbTriangleZ uint32 = 1000 + 17
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25 )
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26
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a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
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27 const wgs84 = 4326
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
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28
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29 type tin struct {
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30 epsg uint32
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31 vertices []octree.Vertex
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32 triangles [][]int32
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33
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34 min octree.Vertex
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35 max octree.Vertex
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36 }
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37
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38 func (t *tin) FromWKB(data []byte) error {
af1d4d44a88a Experimental tin octree indexer.
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39 log.Printf("data length %d\n", len(data))
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40
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41 r := bytes.NewReader(data)
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42
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43 endian, err := r.ReadByte()
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44
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45 var order binary.ByteOrder
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46
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47 switch {
af1d4d44a88a Experimental tin octree indexer.
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48 case err != nil:
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49 return err
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50 case endian == wkbNDR:
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51 order = binary.LittleEndian
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52 case endian == wkbXDR:
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53 order = binary.BigEndian
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54 default:
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55 return fmt.Errorf("unknown byte order %x", endian)
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56 }
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57
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58 var geomType uint32
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59 err = binary.Read(r, order, &geomType)
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60
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61 switch {
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62 case err != nil:
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63 return err
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64 case geomType != wkbTinZ:
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65 return fmt.Errorf("unknown geometry type %x", geomType)
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66 }
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67
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68 var num uint32
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69 if err = binary.Read(r, order, &num); err != nil {
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70 return err
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71 }
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72
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73 vertices := make([]octree.Vertex, 0, 100000)
661
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74
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75 var v octree.Vertex
661
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76
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77 v2i := make(map[octree.Vertex]int32, 100000)
661
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78
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79 var indexPool []int32
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80
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81 allocIndices := func() []int32 {
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82 if len(indexPool) == 0 {
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83 indexPool = make([]int32, 3*8*1024)
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84 }
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85 ids := indexPool[:3]
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86 indexPool = indexPool[3:]
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87 return ids
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88 }
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89
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90 var triangles [][]int32
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91
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92 min := octree.Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64}
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93 max := octree.Vertex{-math.MaxFloat64, -math.MaxFloat64, -math.MaxFloat64}
661
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94
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95 for i := uint32(0); i < num; i++ {
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parents:
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96
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97 endian, err = r.ReadByte()
af1d4d44a88a Experimental tin octree indexer.
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parents:
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98 switch {
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99 case err != nil:
af1d4d44a88a Experimental tin octree indexer.
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parents:
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100 return err
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parents:
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101 case endian == wkbNDR:
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102 order = binary.LittleEndian
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parents:
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103 case endian == wkbXDR:
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104 order = binary.BigEndian
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parents:
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105 default:
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parents:
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106 return fmt.Errorf("unknown byte order %x", endian)
af1d4d44a88a Experimental tin octree indexer.
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parents:
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107 }
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108
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parents:
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109 err = binary.Read(r, order, &geomType)
af1d4d44a88a Experimental tin octree indexer.
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110 switch {
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parents:
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111 case err != nil:
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parents:
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112 return err
af1d4d44a88a Experimental tin octree indexer.
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parents:
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113 case geomType != wkbTriangleZ:
af1d4d44a88a Experimental tin octree indexer.
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114 return fmt.Errorf("unknown geometry type %d", geomType)
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parents:
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115 }
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116
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117 var rings uint32
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118 if err = binary.Read(r, order, &rings); err != nil {
af1d4d44a88a Experimental tin octree indexer.
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119 return err
af1d4d44a88a Experimental tin octree indexer.
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120 }
af1d4d44a88a Experimental tin octree indexer.
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parents:
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121 triangle := allocIndices()
af1d4d44a88a Experimental tin octree indexer.
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parents:
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122
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123 for ring := uint32(0); ring < rings; ring++ {
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124 var npoints uint32
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parents:
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125 if err = binary.Read(r, order, &npoints); err != nil {
af1d4d44a88a Experimental tin octree indexer.
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126 return err
af1d4d44a88a Experimental tin octree indexer.
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parents:
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127 }
af1d4d44a88a Experimental tin octree indexer.
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parents:
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128
af1d4d44a88a Experimental tin octree indexer.
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parents:
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129 if npoints < 3 {
af1d4d44a88a Experimental tin octree indexer.
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130 return errTooLessPoints
af1d4d44a88a Experimental tin octree indexer.
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parents:
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131 }
af1d4d44a88a Experimental tin octree indexer.
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parents:
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132
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133 for p := uint32(0); p < npoints; p++ {
af1d4d44a88a Experimental tin octree indexer.
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parents:
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134 var x, y, z uint64
af1d4d44a88a Experimental tin octree indexer.
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parents:
diff changeset
135 for _, addr := range []*uint64{&x, &y, &z} {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
136 if err = binary.Read(r, order, addr); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
137 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
138 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
139 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
140 if p >= 3 || ring >= 1 {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
141 // Don't store the forth point.
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
142 continue
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
143 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
144 // Do this conversion later to spare reflect calls
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
145 // and allocs in binary.Read.
729
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
146 v.X = math.Float64frombits(x)
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
147 v.Y = math.Float64frombits(y)
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
148 v.Z = math.Float64frombits(z)
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
149 idx, found := v2i[v]
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
150 if !found {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
151 idx = int32(len(vertices))
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
152 v2i[v] = idx
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
153 vertices = append(vertices, v)
729
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
154 min.Minimize(v)
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
155 max.Maximize(v)
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
156 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
157 triangle[p] = idx
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
158 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
159 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
160 triangles = append(triangles, triangle)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
161 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
162
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
163 log.Printf("bbox: [[%f, %f], [%f, %f]]\n",
729
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
164 min.X, min.Y, max.X, max.Y)
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
165
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166 *t = tin{
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
167 epsg: wgs84,
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
168 vertices: vertices,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
169 triangles: triangles,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
170 min: min,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
171 max: max,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
172 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
173
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
174 return nil
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
175 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
177 func (t *tin) Scan(raw interface{}) error {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
178
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
179 data, ok := raw.([]byte)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
180 if !ok {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
181 return errNoByteSlice
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
182 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
183 return t.FromWKB(data)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
184 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
185
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
186 func (t *tin) Serialize(w io.Writer) error {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
187
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
188 if err := binary.Write(w, binary.LittleEndian, t.epsg); err != nil {
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
189 return err
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
190 }
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
191
729
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
192 if err := t.min.Write(w); err != nil {
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
193 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
194 }
729
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
195 if err := t.max.Write(w); err != nil {
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
196 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
197 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
198
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
199 if err := binary.Write(
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
200 w, binary.LittleEndian, uint32(len(t.vertices))); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
201 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
202 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
203
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
204 for _, v := range t.vertices {
729
b0bd242ff821 Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 664
diff changeset
205 if err := v.Write(w); err != nil {
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
206 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
207 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
208 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
209 log.Printf("vertices %d (%d)\n", len(t.vertices), len(t.vertices)*3*8)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
210
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
211 if err := binary.Write(
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
212 w, binary.LittleEndian, uint32(len(t.triangles))); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
213 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
214 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
215
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
216 var buf [binary.MaxVarintLen32]byte
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
217 var written int
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
218 var last int32
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
219 for _, triangle := range t.triangles {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
220 for _, idx := range triangle {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
221 value := idx - last
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
222 n := binary.PutVarint(buf[:], int64(value))
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
223 for p := buf[:n]; len(p) > 0; p = p[n:] {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
224 var err error
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
225 if n, err = w.Write(p); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
226 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
227 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
228 written += n
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
229 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
230 last = idx
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
231 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
232 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
233 log.Printf("compressed tin indices in bytes: %d (%d)\n",
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
234 written, 3*4*len(t.triangles))
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
235
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
236 return nil
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
237 }