Mercurial > gemma
annotate pkg/mesh/loader.go @ 5417:2d294ad81241 marking-single-beam
Dont loose Z values in markings.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 07 Jul 2021 18:14:04 +0200 |
parents | f4abfd0ee8ad |
children | 5f47eeea988d |
rev | line source |
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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
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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" |
727
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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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166 } |