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annotate pkg/octree/tin.go @ 2549:9bf6b767a56a

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client: refactored and improved splitscreen for diagrams To make different diagrams possible, the splitscreen view needed to be decoupled from the cross profiles. Also the style has changed to make it more consistent with the rest of the app. The standard box header is now used and there are collapse and expand animations.
author Markus Kottlaender <markus@intevation.de>
date Fri, 08 Mar 2019 08:50:47 +0100
parents 45d51a49f191
children 59e7a011d347
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2018 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 package octree
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15
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16 import (
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17 "bytes"
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18 "encoding/binary"
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19 "errors"
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20 "fmt"
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21 "io"
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22 "log"
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23 "math"
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24
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25 "gemma.intevation.de/gemma/pkg/models"
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26 "gemma.intevation.de/gemma/pkg/wkb"
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27 )
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28
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29 var (
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30 errNoByteSlice = errors.New("Not a byte slice")
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31 errTooLessPoints = errors.New("Too less points")
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32 )
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33
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34 // Tin stores a mesh of triangles with common vertices.
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35 type Tin struct {
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36 // EPSG holds the projection.
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37 EPSG uint32
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38 // Vertices are the shared vertices.
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39 Vertices []Vertex
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40 // Triangles are the triangles.
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41 Triangles [][]int32
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42
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43 // Min is the lower left corner of the bbox.
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44 Min Vertex
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45 // Max is the upper right corner of the bbox.
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46 Max Vertex
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47 }
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48
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49 // FromWKB constructs the TIN from a WKB representation.
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50 // Shared vertices are identified and referenced by the
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51 // same index.
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52 func (t *Tin) FromWKB(data []byte) error {
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53 log.Printf("info: data length %d\n", len(data))
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54
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55 r := bytes.NewReader(data)
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56
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57 endian, err := r.ReadByte()
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59 var order binary.ByteOrder
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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 endian == wkb.NDR:
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65 order = binary.LittleEndian
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66 case endian == wkb.XDR:
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67 order = binary.BigEndian
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68 default:
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69 return fmt.Errorf("unknown byte order %x", endian)
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70 }
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71
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72 var geomType uint32
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73 err = binary.Read(r, order, &geomType)
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74
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75 switch {
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76 case err != nil:
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77 return err
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78 case geomType != wkb.TinZ:
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79 return fmt.Errorf("unknown geometry type %x", geomType)
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80 }
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81
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82 var num uint32
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83 if err = binary.Read(r, order, &num); err != nil {
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84 return err
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85 }
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86
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87 vertices := make([]Vertex, 0, 100000)
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88
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89 var v Vertex
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90
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91 v2i := make(map[Vertex]int32, 100000)
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92
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93 var indexPool []int32
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94
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95 allocIndices := func() []int32 {
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96 if len(indexPool) == 0 {
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97 indexPool = make([]int32, 3*8*1024)
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98 }
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99 ids := indexPool[:3]
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100 indexPool = indexPool[3:]
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101 return ids
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102 }
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103
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104 var triangles [][]int32
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105
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106 min := Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64}
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107 max := Vertex{-math.MaxFloat64, -math.MaxFloat64, -math.MaxFloat64}
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108
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109 for i := uint32(0); i < num; i++ {
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110
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111 endian, err = r.ReadByte()
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112 switch {
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113 case err != nil:
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114 return err
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115 case endian == wkb.NDR:
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116 order = binary.LittleEndian
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117 case endian == wkb.XDR:
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118 order = binary.BigEndian
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119 default:
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120 return fmt.Errorf("unknown byte order %x", endian)
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121 }
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122
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123 err = binary.Read(r, order, &geomType)
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124 switch {
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125 case err != nil:
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126 return err
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127 case geomType != wkb.TriangleZ:
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128 return fmt.Errorf("unknown geometry type %d", geomType)
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129 }
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130
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131 var rings uint32
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132 if err = binary.Read(r, order, &rings); err != nil {
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133 return err
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parents:
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134 }
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135 triangle := allocIndices()
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136
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137 for ring := uint32(0); ring < rings; ring++ {
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138 var npoints uint32
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139 if err = binary.Read(r, order, &npoints); err != nil {
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140 return err
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141 }
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142
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143 if npoints < 3 {
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144 return errTooLessPoints
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parents:
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145 }
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parents:
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146
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147 for p := uint32(0); p < npoints; p++ {
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148 var x, y, z uint64
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149 for _, addr := range []*uint64{&x, &y, &z} {
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150 if err = binary.Read(r, order, addr); err != nil {
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151 return err
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152 }
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parents:
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153 }
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154 if p >= 3 || ring >= 1 {
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155 // Don't store the forth point.
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parents:
diff changeset
156 continue
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parents:
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157 }
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parents:
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158 // Do this conversion later to spare reflect calls
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parents:
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159 // and allocs in binary.Read.
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160 v.X = math.Float64frombits(x)
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parents:
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161 v.Y = math.Float64frombits(y)
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diff changeset
162 v.Z = math.Float64frombits(z)
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parents:
diff changeset
163 idx, found := v2i[v]
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parents:
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164 if !found {
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165 idx = int32(len(vertices))
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166 v2i[v] = idx
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parents:
diff changeset
167 vertices = append(vertices, v)
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168 min.Minimize(v)
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parents:
diff changeset
169 max.Maximize(v)
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170 }
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171 triangle[p] = idx
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172 }
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parents:
diff changeset
173 }
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diff changeset
174 triangles = append(triangles, triangle)
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175 }
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diff changeset
176
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diff changeset
177 log.Printf("info: bbox: [[%f, %f], [%f, %f]]\n",
968
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178 min.X, min.Y, max.X, max.Y)
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179
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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diff changeset
180 *t = Tin{
1373
84e78d2e2d95 Backend: Centralized the definition of WGS84 constant in the models package.
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parents: 1328
diff changeset
181 EPSG: models.WGS84,
968
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182 Vertices: vertices,
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183 Triangles: triangles,
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diff changeset
184 Min: min,
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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diff changeset
185 Max: max,
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
186 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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diff changeset
187
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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188 return nil
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
189 }
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190
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f4dcbe8941a1 Octree: Resolved the remaing golint issues with this package.
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parents: 1691
diff changeset
191 // Scan implements the sql.Scanner interface.
968
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diff changeset
192 func (t *Tin) Scan(raw interface{}) error {
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f9fb6c399f3f Moved generating of tins to octree package.
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parents: 968
diff changeset
193 if raw == nil {
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diff changeset
194 return nil
f9fb6c399f3f Moved generating of tins to octree package.
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parents: 968
diff changeset
195 }
968
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diff changeset
196 data, ok := raw.([]byte)
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diff changeset
197 if !ok {
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198 return errNoByteSlice
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199 }
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diff changeset
200 return t.FromWKB(data)
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diff changeset
201 }
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diff changeset
202
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parents: 1373
diff changeset
203 func (t *Tin) serialize(w io.Writer) error {
968
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204
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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diff changeset
205 if err := binary.Write(w, binary.LittleEndian, t.EPSG); err != nil {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
206 return err
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
207 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
208
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
209 if err := t.Min.Write(w); err != nil {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
210 return err
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
211 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
212 if err := t.Max.Write(w); err != nil {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
213 return err
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
214 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
215
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
216 if err := binary.Write(
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
217 w, binary.LittleEndian, uint32(len(t.Vertices))); err != nil {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
218 return err
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
219 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
220
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
diff changeset
221 for _, v := range t.Vertices {
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parents:
diff changeset
222 if err := v.Write(w); err != nil {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
223 return err
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
224 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
225 }
1691
de09bd3b5c05 Octree: Fixed a few golint quirks and normalized logging a bit.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 1373
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226 log.Printf("info: vertices %d (%d)\n", len(t.Vertices), len(t.Vertices)*3*8)
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a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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227
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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228 if err := binary.Write(
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
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229 w, binary.LittleEndian, uint32(len(t.Triangles))); err != nil {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
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parents:
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230 return err
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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231 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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232
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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233 var buf [binary.MaxVarintLen32]byte
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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234 var written int
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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235 var last int32
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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236 for _, triangle := range t.Triangles {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
237 for _, idx := range triangle {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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238 value := idx - last
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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239 n := binary.PutVarint(buf[:], int64(value))
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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240 for p := buf[:n]; len(p) > 0; p = p[n:] {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
241 var err error
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
242 if n, err = w.Write(p); err != nil {
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
243 return err
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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244 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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245 written += n
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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246 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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247 last = idx
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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248 }
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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249 }
1691
de09bd3b5c05 Octree: Fixed a few golint quirks and normalized logging a bit.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 1373
diff changeset
250 log.Printf("info: compressed tin indices in bytes: %d (%d)\n",
968
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
251 written, 3*4*len(t.Triangles))
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
252
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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253 return nil
a4fe07a21ba7 Moved octree builder into octree package to be reusable by the sounding result import job.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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254 }