Mercurial > gemma

annotate cmd/tin2octree/tin.go @ 720:aeaa2adf5a8b octree

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octree: write SQL insert statements for octree indices.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 21 Sep 2018 17:36:00 +0200
parents a3d722e1f593
children b0bd242ff821
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package main
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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2
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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3 import (
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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4 "bytes"
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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5 "encoding/binary"
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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6 "errors"
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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7 "fmt"
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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8 "io"
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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9 "log"
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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10 "math"
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parents:
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11 )
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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12
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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13 var (
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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14 errNoByteSlice = errors.New("Not a byte slice")
af1d4d44a88a Experimental tin octree indexer.
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15 errTooLessPoints = errors.New("Too less points")
af1d4d44a88a Experimental tin octree indexer.
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16 )
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17
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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18 const (
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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19 wkbXDR byte = 0
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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20 wkbNDR byte = 1
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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21 wkbTinZ uint32 = 1000 + 16
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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22 wkbTriangleZ uint32 = 1000 + 17
af1d4d44a88a Experimental tin octree indexer.
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23 )
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24
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
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25 const wgs84 = 4326
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
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26
661
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27 type tin struct {
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
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diff changeset
28 epsg uint32
661
af1d4d44a88a Experimental tin octree indexer.
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29 vertices []vertex
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30 triangles [][]int32
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31
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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32 min vertex
af1d4d44a88a Experimental tin octree indexer.
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33 max vertex
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34 }
af1d4d44a88a Experimental tin octree indexer.
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35
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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36 func (t *tin) FromWKB(data []byte) error {
af1d4d44a88a Experimental tin octree indexer.
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37 log.Printf("data length %d\n", len(data))
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38
af1d4d44a88a Experimental tin octree indexer.
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39 r := bytes.NewReader(data)
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40
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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41 endian, err := r.ReadByte()
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42
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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43 var order binary.ByteOrder
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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44
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45 switch {
af1d4d44a88a Experimental tin octree indexer.
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46 case err != nil:
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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47 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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48 case endian == wkbNDR:
af1d4d44a88a Experimental tin octree indexer.
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49 order = binary.LittleEndian
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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50 case endian == wkbXDR:
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51 order = binary.BigEndian
af1d4d44a88a Experimental tin octree indexer.
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52 default:
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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53 return fmt.Errorf("unknown byte order %x", endian)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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54 }
af1d4d44a88a Experimental tin octree indexer.
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55
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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56 var geomType uint32
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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57 err = binary.Read(r, order, &geomType)
af1d4d44a88a Experimental tin octree indexer.
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parents:
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58
af1d4d44a88a Experimental tin octree indexer.
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59 switch {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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60 case err != nil:
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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61 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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62 case geomType != wkbTinZ:
af1d4d44a88a Experimental tin octree indexer.
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63 return fmt.Errorf("unknown geometry type %x", geomType)
af1d4d44a88a Experimental tin octree indexer.
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64 }
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65
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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66 var num uint32
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67 if err = binary.Read(r, order, &num); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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68 return err
af1d4d44a88a Experimental tin octree indexer.
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69 }
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70
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71 vertices := make([]vertex, 0, 100000)
af1d4d44a88a Experimental tin octree indexer.
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72
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73 var v vertex
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74
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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75 v2i := make(map[vertex]int32, 100000)
af1d4d44a88a Experimental tin octree indexer.
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76
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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77 var indexPool []int32
af1d4d44a88a Experimental tin octree indexer.
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78
af1d4d44a88a Experimental tin octree indexer.
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79 allocIndices := func() []int32 {
af1d4d44a88a Experimental tin octree indexer.
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parents:
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80 if len(indexPool) == 0 {
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81 indexPool = make([]int32, 3*8*1024)
af1d4d44a88a Experimental tin octree indexer.
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82 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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83 ids := indexPool[:3]
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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84 indexPool = indexPool[3:]
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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85 return ids
af1d4d44a88a Experimental tin octree indexer.
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86 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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87
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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88 var triangles [][]int32
af1d4d44a88a Experimental tin octree indexer.
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89
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90 min := vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64}
af1d4d44a88a Experimental tin octree indexer.
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91 max := vertex{-math.MaxFloat64, -math.MaxFloat64, -math.MaxFloat64}
af1d4d44a88a Experimental tin octree indexer.
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parents:
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92
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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93 for i := uint32(0); i < num; i++ {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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94
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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95 endian, err = r.ReadByte()
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
96 switch {
af1d4d44a88a Experimental tin octree indexer.
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parents:
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97 case err != nil:
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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98 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
99 case endian == wkbNDR:
af1d4d44a88a Experimental tin octree indexer.
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parents:
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100 order = binary.LittleEndian
af1d4d44a88a Experimental tin octree indexer.
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parents:
diff changeset
101 case endian == wkbXDR:
af1d4d44a88a Experimental tin octree indexer.
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parents:
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102 order = binary.BigEndian
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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103 default:
af1d4d44a88a Experimental tin octree indexer.
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parents:
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104 return fmt.Errorf("unknown byte order %x", endian)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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105 }
af1d4d44a88a Experimental tin octree indexer.
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parents:
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106
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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107 err = binary.Read(r, order, &geomType)
af1d4d44a88a Experimental tin octree indexer.
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parents:
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108 switch {
af1d4d44a88a Experimental tin octree indexer.
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parents:
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109 case err != nil:
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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110 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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111 case geomType != wkbTriangleZ:
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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112 return fmt.Errorf("unknown geometry type %d", geomType)
af1d4d44a88a Experimental tin octree indexer.
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parents:
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113 }
af1d4d44a88a Experimental tin octree indexer.
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parents:
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114
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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115 var rings uint32
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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116 if err = binary.Read(r, order, &rings); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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117 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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118 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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119 triangle := allocIndices()
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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120
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121 for ring := uint32(0); ring < rings; ring++ {
af1d4d44a88a Experimental tin octree indexer.
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122 var npoints uint32
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123 if err = binary.Read(r, order, &npoints); err != nil {
af1d4d44a88a Experimental tin octree indexer.
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parents:
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124 return err
af1d4d44a88a Experimental tin octree indexer.
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parents:
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125 }
af1d4d44a88a Experimental tin octree indexer.
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parents:
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126
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
127 if npoints < 3 {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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128 return errTooLessPoints
af1d4d44a88a Experimental tin octree indexer.
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parents:
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129 }
af1d4d44a88a Experimental tin octree indexer.
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parents:
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130
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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131 for p := uint32(0); p < npoints; p++ {
af1d4d44a88a Experimental tin octree indexer.
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parents:
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132 var x, y, z uint64
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parents:
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133 for _, addr := range []*uint64{&x, &y, &z} {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
134 if err = binary.Read(r, order, addr); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
135 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
136 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
137 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
138 if p >= 3 || ring >= 1 {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
139 // Don't store the forth point.
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
140 continue
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
141 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
142 // Do this conversion later to spare reflect calls
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
143 // and allocs in binary.Read.
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
144 v.x = math.Float64frombits(x)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
145 v.y = math.Float64frombits(y)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
146 v.z = math.Float64frombits(z)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
147 idx, found := v2i[v]
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
148 if !found {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
149 idx = int32(len(vertices))
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
150 v2i[v] = idx
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
151 vertices = append(vertices, v)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
152 min.minimize(v)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
153 max.maximize(v)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
154 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
155 triangle[p] = idx
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
156 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
157 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
158 triangles = append(triangles, triangle)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
159 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
160
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
161 log.Printf("bbox: [[%f, %f], [%f, %f]]\n",
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
162 min.x, min.y, max.x, max.y)
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
163
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
164 *t = tin{
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
165 epsg: wgs84,
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166 vertices: vertices,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
167 triangles: triangles,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
168 min: min,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
169 max: max,
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
170 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
171
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
172 return nil
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
173 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
174
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
175 func (t *tin) Scan(raw interface{}) error {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
177 data, ok := raw.([]byte)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
178 if !ok {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
179 return errNoByteSlice
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
180 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
181 return t.FromWKB(data)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
182 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
183
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
184 func (v *vertex) write(w io.Writer) error {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
185 for _, addr := range []*float64{&v.x, &v.y, &v.z} {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
186 if err := binary.Write(
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
187 w, binary.LittleEndian, math.Float64bits(*addr)); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
188 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
189 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
190 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
191 return nil
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
192 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
193
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
194 func (t *tin) Serialize(w io.Writer) error {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
195
664
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
196 if err := binary.Write(w, binary.LittleEndian, t.epsg); err != nil {
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
197 return err
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
198 }
a3d722e1f593 octree: Load point cloud data projected in a suited UTM zone.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 661
diff changeset
199
661
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
200 if err := t.min.write(w); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
201 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
202 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
203 if err := t.max.write(w); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
204 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
205 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
206
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
207 if err := binary.Write(
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
208 w, binary.LittleEndian, uint32(len(t.vertices))); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
209 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
210 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
211
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
212 for _, v := range t.vertices {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
213 if err := v.write(w); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
214 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
215 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
216 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
217 log.Printf("vertices %d (%d)\n", len(t.vertices), len(t.vertices)*3*8)
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
218
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
219 if err := binary.Write(
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
220 w, binary.LittleEndian, uint32(len(t.triangles))); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
221 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
222 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
223
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
224 var buf [binary.MaxVarintLen32]byte
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
225 var written int
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
226 var last int32
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
227 for _, triangle := range t.triangles {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
228 for _, idx := range triangle {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
229 value := idx - last
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
230 n := binary.PutVarint(buf[:], int64(value))
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
231 for p := buf[:n]; len(p) > 0; p = p[n:] {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
232 var err error
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
233 if n, err = w.Write(p); err != nil {
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
234 return err
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
235 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
236 written += n
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
237 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
238 last = idx
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
239 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
240 }
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
241 log.Printf("compressed tin indices in bytes: %d (%d)\n",
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
242 written, 3*4*len(t.triangles))
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
243
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
244 return nil
af1d4d44a88a Experimental tin octree indexer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
245 }