Mercurial > gemma

annotate pkg/mesh/loader.go @ 5601:1222b777f51f

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Made golint finally happy.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sat, 06 Aug 2022 02:09:57 +0200
parents 5f47eeea988d
children e54635c20d43
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
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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
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22 "gemma.intevation.de/gemma/pkg/log"
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23 )
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24
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25 func (s *STRTree) deserializeIndex(r *bufio.Reader) error {
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26 var numIndex int32
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27 if err := binary.Read(r, binary.LittleEndian, &numIndex); err != nil {
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28 return err
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29 }
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30 index := make([]int32, numIndex)
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31 s.index = index
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32
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33 var last int32
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34 for i := range index {
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35 v, err := binary.ReadVarint(r)
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36 if err != nil {
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37 return err
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38 }
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39 value := int32(v) + last
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40 index[i] = value
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41 last = value
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42 }
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43
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44 return nil
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45 }
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46
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47 func (s *STRTree) deserializeBBoxes(r *bufio.Reader) error {
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48
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49 var numBBoxes int32
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50 if err := binary.Read(r, binary.LittleEndian, &numBBoxes); err != nil {
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51 return err
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52 }
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53
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54 bboxes := make([]Box2D, numBBoxes)
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55 s.bboxes = bboxes
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56
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57 var err error
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58
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59 read := func(v *float64) {
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60 if err == nil {
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61 err = binary.Read(r, binary.LittleEndian, v)
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62 }
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63 }
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64
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65 for i := range bboxes {
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66 read(&bboxes[i].X1)
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67 read(&bboxes[i].Y1)
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68 read(&bboxes[i].X2)
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69 read(&bboxes[i].Y2)
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70 }
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71
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72 return err
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73 }
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74
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75 func (s *STRTree) deserialize(r *bufio.Reader) error {
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76 s.tin = new(Tin)
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77
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78 if err := s.tin.Deserialize(r); err != nil {
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79 return err
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80 }
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81 var numEntries uint8
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82 if err := binary.Read(r, binary.LittleEndian, &numEntries); err != nil {
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83 return err
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84 }
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85 s.Entries = int(numEntries)
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86
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87 if err := s.deserializeIndex(r); err != nil {
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88 return err
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89 }
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90
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91 return s.deserializeBBoxes(r)
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92 }
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93
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94 // FromBytes restores a STRTree from a binary representation.
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95 func (s *STRTree) FromBytes(data []byte) error {
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96 r, err := gzip.NewReader(bytes.NewReader(data))
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97 if err != nil {
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98 return err
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99 }
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100 return s.deserialize(bufio.NewReader(r))
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101 }
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102
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103 // Deserialize restores a TIN from a binary representation.
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104 func (t *Tin) Deserialize(r *bufio.Reader) error {
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105
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106 if err := binary.Read(r, binary.LittleEndian, &t.EPSG); err != nil {
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107 return err
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108 }
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109
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110 log.Infof("EPSG: %d\n", t.EPSG)
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111
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112 if err := t.Min.Read(r); err != nil {
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113 return err
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114 }
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115
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116 if err := t.Max.Read(r); err != nil {
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117 return err
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118 }
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119
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120 log.Infof("BBOX: [[%f, %f, %f], [%f, %f, %f]]\n",
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121 t.Min.X, t.Min.Y, t.Min.Z,
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122 t.Max.X, t.Max.Y, t.Max.Z)
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123
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124 var numVertices uint32
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125 if err := binary.Read(r, binary.LittleEndian, &numVertices); err != nil {
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126 return err
674
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127 }
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128
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129 log.Infof("vertices: %d\n", numVertices)
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130
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5af9ab39e715 Renamed a few types to uppercase names to prepare the move to the octree package.
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131 vertices := make([]Vertex, numVertices)
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132 t.Vertices = vertices
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133
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134 for i := range vertices {
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135 if err := vertices[i].Read(r); err != nil {
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136 return err
674
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137 }
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parents:
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138 }
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139
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140 var numTriangles uint32
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141 if err := binary.Read(r, binary.LittleEndian, &numTriangles); err != nil {
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142 return err
674
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parents:
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143 }
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parents:
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144
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parents: 4827
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145 log.Infof("triangles: %d\n", numTriangles)
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146
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147 indices := make([]int32, 3*numTriangles)
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148 triangles := make([][]int32, numTriangles)
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149 t.Triangles = triangles
674
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150
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151 var last int32
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152
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153 for i := range triangles {
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154 tri := indices[:3]
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155 indices = indices[3:]
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parents:
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156 triangles[i] = tri
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parents:
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157 for j := range tri {
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parents:
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158 v, err := binary.ReadVarint(r)
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parents:
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159 if err != nil {
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parents: 2465
diff changeset
160 return err
674
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parents:
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161 }
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parents:
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162 value := int32(v) + last
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parents:
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163 tri[j] = value
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parents:
diff changeset
164 last = value
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parents:
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165 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166 }
120a82bd9953 octree: Added loading frame for contour generation.
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parents:
diff changeset
167
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parents: 2465
diff changeset
168 return nil
f5fce22184da Added a deserializer from STRTrees.
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parents: 2465
diff changeset
169 }