Mercurial > gemma

annotate cmd/octree2contour/loader.go @ 674:120a82bd9953 octree

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octree: Added loading frame for contour generation.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 19 Sep 2018 13:26:30 +0200
parents
children 7bb961d750b6
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rev   line source
674
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package main
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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2
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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3 import (
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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4 "bufio"
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
5 "encoding/binary"
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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6 "io"
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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7 "log"
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
8 "math"
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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9 "os"
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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10
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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11 "github.com/golang/snappy"
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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12 )
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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14 type octree struct {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
15 epsg uint32
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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16
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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17 vertices []vertex
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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18 triangles [][]int32
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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19 index []int32
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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20
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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21 min vertex
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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22 max vertex
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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23 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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24
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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25 func (v *vertex) read(r io.Reader) error {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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26 var buf [8]byte
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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27 b := buf[:]
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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28 if _, err := io.ReadFull(r, b); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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29 return nil
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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30 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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31 v.x = math.Float64frombits(binary.LittleEndian.Uint64(b))
120a82bd9953 octree: Added loading frame for contour generation.
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32 if _, err := io.ReadFull(r, b); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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33 return nil
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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34 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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35 v.y = math.Float64frombits(binary.LittleEndian.Uint64(b))
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36 if _, err := io.ReadFull(r, b); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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37 return nil
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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38 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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39 v.z = math.Float64frombits(binary.LittleEndian.Uint64(b))
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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40 return nil
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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41 }
120a82bd9953 octree: Added loading frame for contour generation.
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42
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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43 type byteReader interface {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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44 io.ByteReader
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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45 io.Reader
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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46 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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47
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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48 func loadOctreeReader(r byteReader) (*octree, error) {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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49 tree := new(octree)
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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50
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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51 if err := binary.Read(r, binary.LittleEndian, &tree.epsg); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
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52 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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53 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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54
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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55 if err := tree.min.read(r); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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56 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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57 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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58
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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59 if err := tree.max.read(r); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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60 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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61 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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62
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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63 var numVertices uint32
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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64 if err := binary.Read(r, binary.LittleEndian, &numVertices); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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65 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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66 }
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67
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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68 log.Printf("vertices: %d\n", numVertices)
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69
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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70 vertices := make([]vertex, numVertices)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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71 tree.vertices = vertices
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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72
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73 for i := range vertices {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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74 if err := vertices[i].read(r); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
75 return nil, err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
76 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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77 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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78
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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79 var numTriangles uint32
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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80 if err := binary.Read(r, binary.LittleEndian, &numTriangles); err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
81 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
82 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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83
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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84 log.Printf("triangles: %d\n", numTriangles)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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85
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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86 indices := make([]int32, 3*numTriangles)
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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87 triangles := make([][]int32, numTriangles)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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88 tree.triangles = triangles
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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89
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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90 var last int32
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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91
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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92 for i := range triangles {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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93 tri := indices[:3]
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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94 indices = indices[3:]
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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95 triangles[i] = tri
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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96 for j := range tri {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
97 v, err := binary.ReadVarint(r)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
98 if err != nil {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
99 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
100 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
101 value := int32(v) + last
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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102 tri[j] = value
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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103 last = value
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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104 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
105 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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106
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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107 var numNodes uint32
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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108 if err := binary.Read(r, binary.LittleEndian, &numNodes); err != nil {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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109 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
110 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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111
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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112 log.Printf("num nodes: %d\n", numNodes)
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parents:
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113
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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114 tree.index = make([]int32, numNodes)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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115 entries := tree.index[1:]
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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116
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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117 last = 0
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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118 for i := range entries {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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119 v, err := binary.ReadVarint(r)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
120 if err != nil {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
121 return nil, err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
122 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
123 value := int32(v) + last
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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124 entries[i] = value
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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125 last = value
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
126 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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127
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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128 return tree, nil
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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129 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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130
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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131 func loadOctree(fname string) (*octree, error) {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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132
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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133 f, err := os.Open(fname)
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
134 if err != nil {
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
135 return nil, err
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
136 }
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
137 defer f.Close()
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
138 return loadOctreeReader(bufio.NewReader(snappy.NewReader(f)))
120a82bd9953 octree: Added loading frame for contour generation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
139 }