Mercurial > gemma
annotate pkg/octree/loader.go @ 840:0f61bfc21041
Added end point to get style (colour) information for feature.
author | Sascha Wilde <wilde@intevation.de> |
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date | Fri, 28 Sep 2018 10:56:03 +0200 |
parents | b0bd242ff821 |
children | a244b18cb916 |
rev | line source |
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727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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1 package octree |
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2 |
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3 import ( |
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4 "bufio" |
727
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5 "bytes" |
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6 "encoding/binary" |
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7 "log" |
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8 "os" |
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9 |
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10 "github.com/golang/snappy" |
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11 ) |
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12 |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
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13 func loadReader(r *bufio.Reader) (*Tree, error) { |
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14 tree := new(Tree) |
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15 |
726
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Renamed a few types to uppercase names to prepare the move to the octree package.
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16 if err := binary.Read(r, binary.LittleEndian, &tree.EPSG); err != nil { |
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17 return nil, err |
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18 } |
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19 |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
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20 log.Printf("EPSG: %d\n", tree.EPSG) |
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21 |
729
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22 if err := tree.Min.Read(r); err != nil { |
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23 return nil, err |
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24 } |
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25 |
729
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Removed vertex duplicate.
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26 if err := tree.Max.Read(r); err != nil { |
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27 return nil, err |
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28 } |
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29 |
678
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30 log.Printf("BBOX: [[%f, %f, %f], [%f, %f, %f]]\n", |
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31 tree.Min.X, tree.Min.Y, tree.Min.Z, |
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32 tree.Max.X, tree.Max.Y, tree.Max.Z) |
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33 |
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34 var numVertices uint32 |
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35 if err := binary.Read(r, binary.LittleEndian, &numVertices); err != nil { |
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36 return nil, err |
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37 } |
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38 |
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39 log.Printf("vertices: %d\n", numVertices) |
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40 |
726
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Renamed a few types to uppercase names to prepare the move to the octree package.
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41 vertices := make([]Vertex, numVertices) |
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42 tree.vertices = vertices |
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43 |
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44 for i := range vertices { |
729
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45 if err := vertices[i].Read(r); err != nil { |
674
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46 return nil, err |
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47 } |
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48 } |
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49 |
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50 var numTriangles uint32 |
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51 if err := binary.Read(r, binary.LittleEndian, &numTriangles); err != nil { |
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52 return nil, err |
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53 } |
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54 |
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55 log.Printf("triangles: %d\n", numTriangles) |
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56 |
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57 indices := make([]int32, 3*numTriangles) |
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58 triangles := make([][]int32, numTriangles) |
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59 tree.triangles = triangles |
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60 |
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61 var last int32 |
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62 |
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63 for i := range triangles { |
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64 tri := indices[:3] |
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65 indices = indices[3:] |
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66 triangles[i] = tri |
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67 for j := range tri { |
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68 v, err := binary.ReadVarint(r) |
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69 if err != nil { |
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70 return nil, err |
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71 } |
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72 value := int32(v) + last |
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73 tri[j] = value |
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74 last = value |
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75 } |
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76 } |
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77 |
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78 var numNodes uint32 |
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79 if err := binary.Read(r, binary.LittleEndian, &numNodes); err != nil { |
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80 return nil, err |
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81 } |
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82 |
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83 log.Printf("num nodes: %d\n", numNodes) |
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84 |
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85 tree.index = make([]int32, numNodes) |
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86 entries := tree.index[1:] |
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87 |
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88 last = 0 |
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89 for i := range entries { |
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90 v, err := binary.ReadVarint(r) |
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91 if err != nil { |
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92 return nil, err |
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93 } |
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94 value := int32(v) + last |
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95 entries[i] = value |
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96 last = value |
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97 } |
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98 |
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99 return tree, nil |
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100 } |
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101 |
727
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102 func LoadTree(fname string) (*Tree, error) { |
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103 |
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104 f, err := os.Open(fname) |
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105 if err != nil { |
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106 return nil, err |
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107 } |
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108 defer f.Close() |
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109 return loadReader( |
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110 bufio.NewReader( |
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111 snappy.NewReader(f))) |
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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( |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
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118 bytes.NewReader(data)))) |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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119 } |