Mercurial > gemma

annotate pkg/mesh/loader.go @ 4827:f4abfd0ee8ad remove-octree-debris

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Renamed octree package to mesh as there is no octree any more.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 05 Nov 2019 14:30:22 +0100
parents pkg/octree/loader.go@c0eb491aaaa7
children 5f47eeea988d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1017
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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
4827
f4abfd0ee8ad Renamed octree package to mesh as there is no octree any more.
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14 package mesh
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15
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16 import (
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17 "bufio"
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18 "bytes"
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19 "compress/gzip"
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20 "encoding/binary"
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21 "log"
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22 )
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23
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24 func (s *STRTree) deserializeIndex(r *bufio.Reader) error {
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25 var numIndex int32
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26 if err := binary.Read(r, binary.LittleEndian, &numIndex); err != nil {
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27 return err
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28 }
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29 index := make([]int32, numIndex)
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30 s.index = index
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31
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32 var last int32
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33 for i := range index {
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34 v, err := binary.ReadVarint(r)
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35 if err != nil {
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36 return err
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37 }
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38 value := int32(v) + last
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39 index[i] = value
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40 last = value
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41 }
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42
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43 return nil
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44 }
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45
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46 func (s *STRTree) deserializeBBoxes(r *bufio.Reader) error {
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47
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48 var numBBoxes int32
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49 if err := binary.Read(r, binary.LittleEndian, &numBBoxes); err != nil {
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50 return err
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51 }
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52
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53 bboxes := make([]Box2D, numBBoxes)
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54 s.bboxes = bboxes
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55
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56 var err error
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57
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58 read := func(v *float64) {
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59 if err == nil {
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60 err = binary.Read(r, binary.LittleEndian, v)
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61 }
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62 }
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63
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64 for i := range bboxes {
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65 read(&bboxes[i].X1)
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66 read(&bboxes[i].Y1)
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67 read(&bboxes[i].X2)
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68 read(&bboxes[i].Y2)
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69 }
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70
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71 return err
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72 }
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73
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74 func (s *STRTree) deserialize(r *bufio.Reader) error {
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75 s.tin = new(Tin)
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76
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77 if err := s.tin.Deserialize(r); err != nil {
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78 return err
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79 }
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80 var numEntries uint8
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81 if err := binary.Read(r, binary.LittleEndian, &numEntries); err != nil {
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82 return err
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83 }
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84 s.Entries = int(numEntries)
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85
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86 if err := s.deserializeIndex(r); err != nil {
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87 return err
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88 }
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89
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90 return s.deserializeBBoxes(r)
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91 }
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92
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93 func (s *STRTree) FromBytes(data []byte) error {
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94 r, err := gzip.NewReader(bytes.NewReader(data))
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95 if err != nil {
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96 return err
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97 }
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98 return s.deserialize(bufio.NewReader(r))
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99 }
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100
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101 func (t *Tin) Deserialize(r *bufio.Reader) error {
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102
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103 if err := binary.Read(r, binary.LittleEndian, &t.EPSG); err != nil {
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104 return err
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105 }
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106
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107 log.Printf("info: EPSG: %d\n", t.EPSG)
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108
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109 if err := t.Min.Read(r); err != nil {
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110 return err
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111 }
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112
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113 if err := t.Max.Read(r); err != nil {
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114 return err
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115 }
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116
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117 log.Printf("info: BBOX: [[%f, %f, %f], [%f, %f, %f]]\n",
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118 t.Min.X, t.Min.Y, t.Min.Z,
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119 t.Max.X, t.Max.Y, t.Max.Z)
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120
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121 var numVertices uint32
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122 if err := binary.Read(r, binary.LittleEndian, &numVertices); err != nil {
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123 return err
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124 }
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125
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126 log.Printf("info: vertices: %d\n", numVertices)
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127
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128 vertices := make([]Vertex, numVertices)
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129 t.Vertices = vertices
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130
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131 for i := range vertices {
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132 if err := vertices[i].Read(r); err != nil {
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133 return err
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134 }
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135 }
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136
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137 var numTriangles uint32
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138 if err := binary.Read(r, binary.LittleEndian, &numTriangles); err != nil {
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139 return err
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140 }
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141
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142 log.Printf("info: triangles: %d\n", numTriangles)
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143
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144 indices := make([]int32, 3*numTriangles)
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145 triangles := make([][]int32, numTriangles)
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146 t.Triangles = triangles
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147
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148 var last int32
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149
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150 for i := range triangles {
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151 tri := indices[:3]
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152 indices = indices[3:]
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153 triangles[i] = tri
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154 for j := range tri {
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155 v, err := binary.ReadVarint(r)
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156 if err != nil {
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157 return err
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158 }
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159 value := int32(v) + last
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160 tri[j] = value
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161 last = value
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162 }
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163 }
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164
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165 return nil
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parents: 2465
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166 }