Mercurial > gemma

annotate pkg/octree/loader.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 86c7a023400e
children f5fce22184da
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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 octree
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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 "encoding/binary"
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20 "log"
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21
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22 "github.com/golang/snappy"
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23 )
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24
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25 func loadReader(r *bufio.Reader) (*Tree, error) {
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26 tree := new(Tree)
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27
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28 if err := binary.Read(r, binary.LittleEndian, &tree.EPSG); err != nil {
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29 return nil, err
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30 }
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31
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32 log.Printf("info: EPSG: %d\n", tree.EPSG)
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33
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34 if err := tree.Min.Read(r); err != nil {
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35 return nil, err
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36 }
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37
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38 if err := tree.Max.Read(r); err != nil {
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39 return nil, err
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40 }
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41
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42 log.Printf("info: BBOX: [[%f, %f, %f], [%f, %f, %f]]\n",
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43 tree.Min.X, tree.Min.Y, tree.Min.Z,
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44 tree.Max.X, tree.Max.Y, tree.Max.Z)
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45
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46 var numVertices uint32
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47 if err := binary.Read(r, binary.LittleEndian, &numVertices); err != nil {
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48 return nil, err
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49 }
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50
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51 log.Printf("info: vertices: %d\n", numVertices)
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52
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53 vertices := make([]Vertex, numVertices)
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54 tree.vertices = vertices
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55
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56 for i := range vertices {
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57 if err := vertices[i].Read(r); err != nil {
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58 return nil, err
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59 }
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60 }
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61
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62 var numTriangles uint32
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63 if err := binary.Read(r, binary.LittleEndian, &numTriangles); err != nil {
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64 return nil, err
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65 }
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66
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67 log.Printf("info: triangles: %d\n", numTriangles)
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68
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69 indices := make([]int32, 3*numTriangles)
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70 triangles := make([][]int32, numTriangles)
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71 tree.triangles = triangles
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72
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73 var last int32
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74
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75 for i := range triangles {
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76 tri := indices[:3]
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77 indices = indices[3:]
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78 triangles[i] = tri
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79 for j := range tri {
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80 v, err := binary.ReadVarint(r)
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81 if err != nil {
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82 return nil, err
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83 }
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84 value := int32(v) + last
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85 tri[j] = value
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86 last = value
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87 }
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88 }
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89
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90 var numNodes uint32
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91 if err := binary.Read(r, binary.LittleEndian, &numNodes); err != nil {
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92 return nil, err
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93 }
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94
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95 log.Printf("info: num nodes: %d\n", numNodes)
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96
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97 tree.index = make([]int32, numNodes)
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98 entries := tree.index[1:]
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99
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100 last = 0
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101 for i := range entries {
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102 v, err := binary.ReadVarint(r)
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103 if err != nil {
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104 return nil, err
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105 }
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106 value := int32(v) + last
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107 entries[i] = value
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108 last = value
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109 }
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110
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111 return tree, nil
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112 }
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113
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114 func Deserialize(data []byte) (*Tree, error) {
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115 return loadReader(
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116 bufio.NewReader(
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117 snappy.NewReader(
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118 bytes.NewReader(data))))
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119 }