Mercurial > gemma

annotate pkg/imports/wkb.go @ 1785:614c6c766691

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Waterway area import: Implemented.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sat, 12 Jan 2019 19:53:31 +0100
parents
children 09349ca27dd7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1785
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
1 // This is Free Software under GNU Affero General Public License v >= 3.0
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
2 // without warranty, see README.md and license for details.
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
3 //
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
4 // SPDX-License-Identifier: AGPL-3.0-or-later
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
5 // License-Filename: LICENSES/AGPL-3.0.txt
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
6 //
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
7 // Copyright (C) 2018 by via donau
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
8 // – Österreichische Wasserstraßen-Gesellschaft mbH
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
9 // Software engineering by Intevation GmbH
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
10 //
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
11 // Author(s):
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
13
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
14 package imports
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
15
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
16 import (
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
17 "bytes"
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
18 "encoding/binary"
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
19 "fmt"
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
20 "math"
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
21
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
22 shp "github.com/jonas-p/go-shp"
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
23 )
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
24
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
25 type (
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
26 lineSlice [][]float64
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
27 polygonSlice [][][]float64
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
28
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
29 point struct {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
30 X float64
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
31 Y float64
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
32 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
33 lineString []point
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
34 polygon []lineString
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
35 )
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
36
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
37 const (
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
38 wkbNDR byte = 1
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
39
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
40 wkbLineString uint32 = 2
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
41 wkbPolygon uint32 = 3
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
42 )
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
43
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
44 func (l lineSlice) asWKB() []byte {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
45
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
46 size := 1 + 4 + 4 + len(l)*(2*8)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
47
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
48 buf := bytes.NewBuffer(make([]byte, 0, size))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
49
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
50 binary.Write(buf, binary.LittleEndian, wkbNDR)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
51 binary.Write(buf, binary.LittleEndian, wkbLineString)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
52 binary.Write(buf, binary.LittleEndian, uint32(len(l)))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
53
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
54 for _, c := range l {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
55 var lat, lon float64
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
56 if len(c) > 0 {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
57 lat = c[0]
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
58 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
59 if len(c) > 1 {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
60 lon = c[1]
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
61 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
62 binary.Write(buf, binary.LittleEndian, math.Float64bits(lat))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
63 binary.Write(buf, binary.LittleEndian, math.Float64bits(lon))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
64 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
65
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
66 return buf.Bytes()
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
67 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
68
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
69 func (p polygonSlice) asWKB() []byte {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
70 if p == nil {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
71 return nil
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
72 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
73 // pre-calculate size to avoid reallocations.
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
74 size := 1 + 4 + 4
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
75 for _, ring := range p {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
76 size += 4 + len(ring)*2*8
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
77 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
78
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
79 buf := bytes.NewBuffer(make([]byte, 0, size))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
80
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
81 binary.Write(buf, binary.LittleEndian, wkbNDR)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
82 binary.Write(buf, binary.LittleEndian, wkbPolygon)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
83 binary.Write(buf, binary.LittleEndian, uint32(len(p)))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
84
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
85 for _, ring := range p {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
86 binary.Write(buf, binary.LittleEndian, uint32(len(ring)))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
87 for _, v := range ring {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
88 var lat, lon float64
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
89 if len(v) > 0 {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
90 lat = v[0]
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
91 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
92 if len(v) > 1 {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
93 lon = v[1]
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
94 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
95 binary.Write(buf, binary.LittleEndian, math.Float64bits(lat))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
96 binary.Write(buf, binary.LittleEndian, math.Float64bits(lon))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
97 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
98 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
99
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
100 return buf.Bytes()
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
101 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
102
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
103 func shapeToPolygon(s shp.Shape) (polygon, error) {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
104 switch p := s.(type) {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
105 case *shp.Polygon:
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
106 return toPolygon(p.NumParts, p.Parts, p.Points), nil
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
107 case *shp.PolygonZ:
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
108 return toPolygon(p.NumParts, p.Parts, p.Points), nil
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
109 case *shp.PolygonM:
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
110 return toPolygon(p.NumParts, p.Parts, p.Points), nil
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
111 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
112 return nil, fmt.Errorf("Unsupported shape type %T", s)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
113 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
114
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
115 func toPolygon(numParts int32, parts []int32, points []shp.Point) polygon {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
116 out := make(polygon, numParts)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
117 var pos int32
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
118
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
119 for i := range out {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
120 var howMany int32
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
121 if i+1 >= len(parts) {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
122 howMany = int32(len(points)) - pos
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
123 } else {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
124 howMany = parts[i+1] - parts[i]
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
125 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
126
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
127 line := make(lineString, howMany)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
128 for j := int32(0); j < howMany; j, pos = j+1, pos+1 {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
129 p := &points[pos]
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
130 line[j] = point{p.X, p.Y}
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
131 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
132 out[i] = line
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
133 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
134 return out
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
135 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
136
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
137 func (p polygon) asWKB() []byte {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
138 if p == nil {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
139 return nil
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
140 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
141 // pre-calculate size to avoid reallocations.
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
142 size := 1 + 4 + 4
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
143 for _, ring := range p {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
144 size += 4 + len(ring)*2*8
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
145 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
146
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
147 buf := bytes.NewBuffer(make([]byte, 0, size))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
148
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
149 binary.Write(buf, binary.LittleEndian, wkbNDR)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
150 binary.Write(buf, binary.LittleEndian, wkbPolygon)
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
151 binary.Write(buf, binary.LittleEndian, uint32(len(p)))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
152
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
153 for _, ring := range p {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
154 binary.Write(buf, binary.LittleEndian, uint32(len(ring)))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
155 for _, v := range ring {
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
156 binary.Write(buf, binary.LittleEndian, math.Float64bits(v.X))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
157 binary.Write(buf, binary.LittleEndian, math.Float64bits(v.Y))
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
158 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
159 }
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
160
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
161 return buf.Bytes()
614c6c766691 Waterway area import: Implemented.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
162 }