Mercurial > gemma
annotate pkg/octree/vertex.go @ 3830:464a6a6e05e6 sld-colors
Clean color handling a bit.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Thu, 04 Jul 2019 11:03:36 +0200 |
parents | 71164b817d6e |
children | 4233570de212 |
rev | line source |
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1017
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Added GNU Affero General Public License.
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1 // This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 // without warranty, see README.md and license for details. |
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3 // |
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4 // SPDX-License-Identifier: AGPL-3.0-or-later |
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5 // License-Filename: LICENSES/AGPL-3.0.txt |
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6 // |
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7 // Copyright (C) 2018 by via donau |
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 // Software engineering by Intevation GmbH |
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10 // |
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11 // Author(s): |
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 |
727
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14 package octree |
674
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15 |
726
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16 import ( |
727
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17 "bytes" |
726
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18 "encoding/binary" |
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19 "fmt" |
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20 "io" |
795
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Vertical Triangle intersection: Fixed function to determine where intersection point
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21 "log" |
726
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22 "math" |
768
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Join neighbored linestring segments in octree cross sections and sort them along the input line.
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23 "sort" |
2471
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24 |
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25 "gemma.intevation.de/gemma/pkg/wkb" |
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26 ) |
674
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27 |
726
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28 type ( |
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29 Point struct { |
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30 X float64 |
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31 Y float64 |
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32 } |
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33 |
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34 // Vertex is a 3D vertex. |
726
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35 Vertex struct { |
727
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Moved octree loading stuff to octree package.
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36 X float64 |
41c8dc61f38f
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37 Y float64 |
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Moved octree loading stuff to octree package.
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parents:
726
diff
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38 Z float64 |
726
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39 } |
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40 |
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41 // Triangle is a triangle consisting of three vertices. |
726
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42 Triangle [3]Vertex |
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43 |
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44 // Line is a line defined by first vertex on that line |
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45 // and the second being the direction. |
726
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46 Line [2]Vertex |
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47 |
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48 // MultiPointZ is a set of vertices. |
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49 MultiPointZ []Vertex |
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50 |
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51 // LineStringZ is a line string formed of vertices. |
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52 LineStringZ []Vertex |
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53 |
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54 // MultiLineStringZ is a set of line strings. |
726
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55 MultiLineStringZ []LineStringZ |
774
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56 |
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57 // Box2D is 2D area from (X1, Y1) to (X2, Y2). |
774
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58 Box2D struct { |
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59 X1 float64 |
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60 Y1 float64 |
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61 X2 float64 |
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62 Y2 float64 |
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63 } |
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64 |
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65 // Plane2D is a 2D plane (a line in 2D space). |
774
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66 Plane2D struct { |
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67 A float64 |
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68 B float64 |
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69 C float64 |
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70 } |
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71 |
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72 Plane3D struct { |
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73 A float64 |
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74 B float64 |
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75 C float64 |
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76 D float64 |
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77 } |
726
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78 ) |
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79 |
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80 func (t *Triangle) Plane3D() Plane3D { |
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81 |
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82 v0 := t[1].Sub(t[0]) |
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83 v1 := t[2].Sub(t[0]) |
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84 n := v0.Cross(v1).Normalize() |
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85 |
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86 // x*nx+ y*ny+ z*nz + d = 0 |
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87 // d = - (x*nx+ y*ny + z*nz) |
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88 d := -t[0].Dot(n) |
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89 return Plane3D{ |
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90 A: n.X, |
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91 B: n.Y, |
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92 C: n.Z, |
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93 D: d, |
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94 } |
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95 } |
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96 |
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97 func (t *Triangle) BBox() Box2D { |
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98 minX := math.Min(math.Min(t[0].X, t[1].X), t[2].X) |
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99 maxX := math.Max(math.Max(t[0].X, t[1].X), t[2].X) |
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100 minY := math.Min(math.Min(t[0].Y, t[1].Y), t[2].Y) |
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101 maxY := math.Max(math.Max(t[0].Y, t[1].Y), t[2].Y) |
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102 return Box2D{ |
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103 X1: minX, Y1: minY, |
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104 X2: maxX, Y2: maxY, |
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105 } |
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106 } |
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107 |
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108 func (p Plane3D) Z(x, y float64) float64 { |
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109 // p.A*x + p.B*y + p.C*z + p.D = 0 |
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110 return -(p.A*x + p.B*y + p.D) / p.C |
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111 } |
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112 |
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113 func (p Plane3D) Eval(v Vertex) float64 { |
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114 return p.A*v.X + p.B*v.Y + p.C*v.Z + p.D |
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115 } |
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116 |
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117 func (v Vertex) Normalize() Vertex { |
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118 s := 1 / v.Length() |
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119 return Vertex{ |
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120 X: s * v.X, |
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121 Y: s * v.Y, |
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122 Z: s * v.Z, |
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123 } |
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124 } |
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125 |
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126 func (v Vertex) Dot(w Vertex) float64 { |
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127 return v.X*w.X + v.Y*w.Y + v.Z*w.Z |
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128 } |
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129 |
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130 func (v Vertex) Length() float64 { |
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131 return math.Sqrt(v.Dot(v)) |
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132 } |
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133 |
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134 func area(a, b, c Vertex) float64 { |
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135 return (b.Y-a.Y)*(c.X-b.X) - (b.X-a.X)*(c.Y-b.Y) |
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136 } |
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137 |
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138 func inCircle(a, b, c, p Vertex) bool { |
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139 dx := a.X - p.X |
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140 dy := a.Y - p.Y |
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141 ex := b.X - p.X |
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142 ey := b.Y - p.Y |
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143 fx := c.X - p.X |
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144 fy := c.Y - p.Y |
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145 |
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146 ap := dx*dx + dy*dy |
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147 bp := ex*ex + ey*ey |
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148 cp := fx*fx + fy*fy |
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149 |
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150 return dx*(ey*cp-bp*fy)-dy*(ex*cp-bp*fx)+ap*(ex*fy-ey*fx) < 0 |
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151 } |
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152 |
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153 func circumradius(a, b, c Vertex) float64 { |
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154 dx := b.X - a.X |
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155 dy := b.Y - a.Y |
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156 ex := c.X - a.X |
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157 ey := c.Y - a.Y |
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158 |
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159 bl := dx*dx + dy*dy |
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160 cl := ex*ex + ey*ey |
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161 d := dx*ey - dy*ex |
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162 |
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163 x := (ey*bl - dy*cl) * 0.5 / d |
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164 y := (dx*cl - ex*bl) * 0.5 / d |
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165 |
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166 r := x*x + y*y |
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167 |
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168 if bl == 0 || cl == 0 || d == 0 || r == 0 { |
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169 return infinity |
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170 } |
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171 |
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172 return r |
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173 } |
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174 |
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175 func circumcenter(a, b, c Vertex) Vertex { |
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176 dx := b.X - a.X |
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177 dy := b.Y - a.Y |
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178 ex := c.X - a.X |
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179 ey := c.Y - a.Y |
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180 |
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181 bl := dx*dx + dy*dy |
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182 cl := ex*ex + ey*ey |
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183 d := dx*ey - dy*ex |
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184 |
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185 x := a.X + (ey*bl-dy*cl)*0.5/d |
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186 y := a.Y + (dx*cl-ex*bl)*0.5/d |
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187 |
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188 return Vertex{X: x, Y: y} |
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189 } |
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190 |
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191 func polygonArea(points []Vertex) float64 { |
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192 var result float64 |
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193 for i, p := range points { |
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194 q := points[(i+1)%len(points)] |
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195 result += (p.X - q.X) * (p.Y + q.Y) |
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196 } |
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197 return result / 2 |
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198 } |
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199 |
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200 func polygonPerimeter(points []Vertex) float64 { |
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201 if len(points) == 0 { |
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202 return 0 |
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203 } |
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204 var result float64 |
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205 q := points[len(points)-1] |
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206 for _, p := range points { |
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207 result += p.Distance2D(q) |
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208 q = p |
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209 } |
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210 return result |
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211 } |
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212 |
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213 func (v Vertex) Distance2D(w Vertex) float64 { |
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214 return math.Hypot(v.X-w.X, v.Y-w.Y) |
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215 } |
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216 |
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217 func (v Vertex) Distance(w Vertex) float64 { |
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218 v = v.Sub(w) |
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219 return math.Sqrt(v.Dot(v)) |
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220 } |
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221 |
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222 // Minimize adjust this vertex v to hold the minimum |
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223 // values component-wise of v and w. |
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224 func (v *Vertex) Minimize(w Vertex) { |
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225 if w.X < v.X { |
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226 v.X = w.X |
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227 } |
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228 if w.Y < v.Y { |
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229 v.Y = w.Y |
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230 } |
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231 if w.Z < v.Z { |
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232 v.Z = w.Z |
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233 } |
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234 } |
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235 |
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236 // Maximize adjust this vertex v to hold the maximum |
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237 // values component-wise of v and w. |
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238 func (v *Vertex) Maximize(w Vertex) { |
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239 if w.X > v.X { |
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240 v.X = w.X |
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241 } |
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242 if w.Y > v.Y { |
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243 v.Y = w.Y |
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244 } |
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245 if w.Z > v.Z { |
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246 v.Z = w.Z |
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247 } |
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248 } |
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249 |
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250 func (v Vertex) SquaredDistance2D(w Vertex) float64 { |
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251 dx := v.X - w.X |
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252 dy := v.Y - w.Y |
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253 return dx*dx + dy*dy |
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254 } |
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255 |
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256 // Sub2D returns (v - w) component-wise. |
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257 func (v Vertex) Sub2D(w Vertex) Vertex { |
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258 return Vertex{ |
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259 X: v.X - w.X, |
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260 Y: v.Y - w.Y, |
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261 } |
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262 } |
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263 |
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264 // Sub returns (v - w) component-wise. |
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265 func (v Vertex) Sub(w Vertex) Vertex { |
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266 return Vertex{ |
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267 v.X - w.X, |
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268 v.Y - w.Y, |
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269 v.Z - w.Z, |
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270 } |
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271 } |
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272 |
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273 // Add returns (v + w) component-wise. |
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274 func (v Vertex) Add(w Vertex) Vertex { |
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275 return Vertex{ |
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276 v.X + w.X, |
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277 v.Y + w.Y, |
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278 v.Z + w.Z, |
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279 } |
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280 } |
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281 |
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282 // Scale returns s*v component-wise. |
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283 func (v Vertex) Scale(s float64) Vertex { |
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284 return Vertex{ |
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285 s * v.X, |
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286 s * v.Y, |
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287 s * v.Z, |
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288 } |
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289 } |
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290 |
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291 // Interpolate returns a function that return s*v2 + v1 |
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292 // component-wise. |
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293 func Interpolate(v1, v2 Vertex) func(Vertex) Vertex { |
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294 v2 = v2.Sub(v1) |
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295 return func(s Vertex) Vertex { |
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296 return Vertex{ |
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297 v2.X*s.X + v1.X, |
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298 v2.Y*s.Y + v1.Y, |
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299 v2.Z*s.Z + v1.Z, |
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300 } |
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301 } |
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302 } |
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303 |
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304 // Less returns if one of v component is less than the |
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305 // corresponing component in w. |
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306 func (v Vertex) Less(w Vertex) bool { |
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307 return v.X < w.X || v.Y < w.Y || v.Z < w.Z |
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308 } |
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309 |
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310 // NewLine return a line of point/direction. |
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311 func NewLine(p1, p2 Vertex) Line { |
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312 return Line{ |
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313 p2.Sub(p1), |
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314 p1, |
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315 } |
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316 } |
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317 |
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318 // Eval returns the vertex for t*l[0] + l[1]. |
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319 func (l Line) Eval(t float64) Vertex { |
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320 return l[0].Scale(t).Add(l[1]) |
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321 } |
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322 |
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323 // IntersectHorizontal returns the intersection point |
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324 // for a given z value. |
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325 func (l Line) IntersectHorizontal(h float64) Vertex { |
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326 t := (h - l[1].Z) / l[0].Z |
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327 return l.Eval(t) |
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328 } |
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329 |
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330 func side(z, h float64) int { |
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331 switch { |
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332 case z < h: |
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333 return -1 |
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334 case z > h: |
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335 return +1 |
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336 } |
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337 return 0 |
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338 } |
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339 |
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340 func (v Vertex) Dot2(w Vertex) float64 { |
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341 return v.X*w.X + v.Y*w.Y |
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342 } |
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343 |
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344 func (t *Triangle) Contains(x, y float64) bool { |
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345 v0 := t[2].Sub(t[0]) |
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346 v1 := t[1].Sub(t[0]) |
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347 v2 := Vertex{X: x, Y: y}.Sub(t[0]) |
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348 |
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349 dot00 := v0.Dot2(v0) |
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350 dot01 := v0.Dot2(v1) |
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351 dot02 := v0.Dot2(v2) |
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352 dot11 := v1.Dot2(v1) |
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353 dot12 := v1.Dot2(v2) |
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354 |
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355 // Compute barycentric coordinates |
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356 invDenom := 1 / (dot00*dot11 - dot01*dot01) |
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357 u := (dot11*dot02 - dot01*dot12) * invDenom |
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358 v := (dot00*dot12 - dot01*dot02) * invDenom |
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359 |
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360 // Check if point is in triangle |
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361 return u >= 0 && v >= 0 && u+v < 1 |
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362 } |
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363 |
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364 // IntersectHorizontal calculates the line string that |
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365 // results when cutting a triangle a a certain height. |
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366 // Can be empty (on intersection), |
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367 // one vertex (only touching an vertex) or |
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368 // two vertices (real intersection). |
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369 func (t *Triangle) IntersectHorizontal(h float64) LineStringZ { |
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370 sides := [3]int{ |
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371 side(t[0].Z, h), |
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372 side(t[1].Z, h), |
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373 side(t[2].Z, h), |
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374 } |
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375 |
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376 var points LineStringZ |
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377 |
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378 for i := 0; i < 3; i++ { |
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379 j := (i + 1) % 3 |
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380 si := sides[i] |
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381 sj := sides[j] |
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382 |
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383 switch { |
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384 case si == 0 && sj == 0: |
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385 // both on plane |
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386 points = append(points, t[i], t[j]) |
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387 case si == 0 && sj != 0: |
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388 // first on plane |
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389 points = append(points, t[i]) |
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390 case si != 0 && sj == 0: |
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391 // second on plane |
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392 points = append(points, t[j]) |
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393 case si == sj: |
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394 // both on same side |
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395 default: |
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396 // real intersection |
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397 v := NewLine(t[i], t[j]).IntersectHorizontal(h) |
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398 points = append(points, v) |
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399 } |
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400 } |
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401 |
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402 return points |
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403 } |
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404 |
768
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
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405 func linearScale(x1, y1, x2, y2 float64) func(Vertex) float64 { |
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406 dx := x2 - x1 |
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407 dy := y2 - y1 |
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408 |
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409 switch { |
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410 case dx != 0: |
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411 return func(v Vertex) float64 { |
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412 return (v.X - x1) / dx |
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413 } |
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414 case dy != 0: |
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415 return func(v Vertex) float64 { |
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416 return (v.Y - y1) / dy |
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417 } |
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418 default: |
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419 return func(Vertex) float64 { |
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420 return 0 |
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421 } |
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422 } |
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423 } |
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424 |
3639
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425 func (ls LineStringZ) BBox() Box2D { |
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426 |
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Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
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427 min := Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64} |
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428 max := Vertex{-math.MaxFloat64, -math.MaxFloat64, -math.MaxFloat64} |
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429 |
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Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
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430 for _, v := range ls { |
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431 min.Minimize(v) |
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432 max.Maximize(v) |
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433 } |
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434 |
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Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
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435 return Box2D{ |
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436 X1: min.X, |
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437 Y1: min.Y, |
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438 X2: max.X, |
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439 Y2: max.Y, |
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440 } |
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441 } |
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442 |
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443 func (ls LineStringZ) Area() float64 { |
3646
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Generate random points for second mesh.
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444 return polygonArea(ls) |
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445 } |
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446 |
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447 func (ls LineStringZ) Reverse() { |
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448 for i, j := 0, len(ls)-1; i < j; i, j = i+1, j-1 { |
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449 ls[i], ls[j] = ls[j], ls[i] |
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450 } |
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451 } |
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Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
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452 |
768
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453 func (ls LineStringZ) order(position func(Vertex) float64) { |
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454 type posVertex struct { |
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455 pos float64 |
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456 v Vertex |
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457 } |
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458 positions := make([]posVertex, len(ls)) |
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459 for i, v := range ls { |
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460 positions[i] = posVertex{position(v), v} |
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461 } |
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462 sort.Slice(positions, func(i, j int) bool { |
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463 return positions[i].pos < positions[j].pos |
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464 }) |
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465 for i := range positions { |
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466 ls[i] = positions[i].v |
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467 } |
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468 } |
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469 |
1692
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Octree: Resolved the remaing golint issues with this package.
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470 // EpsEquals returns true if v and w are equal component-wise |
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471 // with the values within a epsilon range. |
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472 func (v Vertex) EpsEquals(w Vertex) bool { |
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473 const eps = 1e-5 |
768
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474 return math.Abs(v.X-w.X) < eps && |
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475 math.Abs(v.Y-w.Y) < eps && math.Abs(v.Z-w.Z) < eps |
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476 } |
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477 |
1692
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478 // JoinOnLine joins the the elements of a given multi line string |
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479 // under the assumption that the segments are all on the line segment |
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480 // from (x1, y1) to (x2, y2). |
763
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More infrastructure for the octree driven cross section endpoint.
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481 func (mls MultiLineStringZ) JoinOnLine(x1, y1, x2, y2 float64) MultiLineStringZ { |
768
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482 |
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483 position := linearScale(x1, y1, x2, y2) |
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484 |
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485 type posLineString struct { |
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486 pos float64 |
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487 line LineStringZ |
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488 } |
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489 |
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490 positions := make([]posLineString, 0, len(mls)) |
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491 |
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492 for _, ls := range mls { |
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Join neighbored linestring segments in octree cross sections and sort them along the input line.
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493 if len(ls) == 0 { |
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494 continue |
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Join neighbored linestring segments in octree cross sections and sort them along the input line.
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495 } |
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Join neighbored linestring segments in octree cross sections and sort them along the input line.
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496 // order the atoms first |
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497 ls.order(position) |
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498 positions = append(positions, posLineString{position(ls[0]), ls}) |
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Join neighbored linestring segments in octree cross sections and sort them along the input line.
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499 } |
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500 |
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501 sort.Slice(positions, func(i, j int) bool { |
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502 return positions[i].pos < positions[j].pos |
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503 }) |
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504 |
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505 out := make(MultiLineStringZ, 0, len(positions)) |
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|
506 |
796
0cc97135717c
More fixes to vertical triangle intersection.
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|
507 var ignored int |
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More fixes to vertical triangle intersection.
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508 |
768
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
509 for i := range positions { |
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
510 curr := positions[i].line |
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
511 if l := len(out); l > 0 { |
796
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
512 last := out[l-1] |
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
513 |
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
514 if last[len(last)-1].EpsEquals(curr[0]) { |
768
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
515 out[l-1] = append(last[:len(last)-1], curr...) |
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
516 continue |
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
517 } |
796
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
518 if position(last[len(last)-1]) > position(curr[0]) { |
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
519 ignored++ |
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
520 continue |
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
521 } |
768
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
522 } |
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
523 out = append(out, curr) |
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
524 } |
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
525 |
1691
de09bd3b5c05
Octree: Fixed a few golint quirks and normalized logging a bit.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
1329
diff
changeset
|
526 log.Printf("info: ignored parts: %d\n", ignored) |
796
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
527 |
768
3219e7e34953
Join neighbored linestring segments in octree cross sections and sort them along the input line.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
763
diff
changeset
|
528 return out |
763
d05bc3e34338
More infrastructure for the octree driven cross section endpoint.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
730
diff
changeset
|
529 } |
d05bc3e34338
More infrastructure for the octree driven cross section endpoint.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
730
diff
changeset
|
530 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
531 // Write writes a Vertex as three 64 bit values in little endian order |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
532 // to the given writer. |
729
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
533 func (v *Vertex) Write(w io.Writer) error { |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
534 if err := binary.Write( |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
535 w, binary.LittleEndian, math.Float64bits(v.X)); err != nil { |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
536 return err |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
537 } |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
538 if err := binary.Write( |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
539 w, binary.LittleEndian, math.Float64bits(v.Y)); err != nil { |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
540 return err |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
541 } |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
542 return binary.Write( |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
543 w, binary.LittleEndian, math.Float64bits(v.Z)) |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
544 } |
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
545 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
546 // Read fills this vertex with three 64 bit values stored as |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
547 // little endian from the given reader. |
729
b0bd242ff821
Removed vertex duplicate.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
727
diff
changeset
|
548 func (v *Vertex) Read(r io.Reader) error { |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
549 var buf [8]byte |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
550 b := buf[:] |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
551 if _, err := io.ReadFull(r, b); err != nil { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
552 return nil |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
553 } |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
554 v.X = math.Float64frombits(binary.LittleEndian.Uint64(b)) |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
555 if _, err := io.ReadFull(r, b); err != nil { |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
556 return nil |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
557 } |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
558 v.Y = math.Float64frombits(binary.LittleEndian.Uint64(b)) |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
559 if _, err := io.ReadFull(r, b); err != nil { |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
560 return nil |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
561 } |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
562 v.Z = math.Float64frombits(binary.LittleEndian.Uint64(b)) |
726
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
563 return nil |
5af9ab39e715
Renamed a few types to uppercase names to prepare the move to the octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
718
diff
changeset
|
564 } |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
565 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
566 // AsWKB returns the WKB representation of the given multi line string. |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
567 func (mls MultiLineStringZ) AsWKB() []byte { |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
568 |
924
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
569 // pre-calculate size to avoid reallocations. |
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
570 size := 1 + 4 + 4 |
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
571 for _, ml := range mls { |
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
572 size += 1 + 4 + 4 + len(ml)*3*8 |
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
573 } |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
574 |
924
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
575 buf := bytes.NewBuffer(make([]byte, 0, size)) |
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
576 |
2471
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
577 binary.Write(buf, binary.LittleEndian, wkb.NDR) |
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
578 binary.Write(buf, binary.LittleEndian, wkb.MultiLineStringZ) |
924
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
579 binary.Write(buf, binary.LittleEndian, uint32(len(mls))) |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
580 |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
581 for _, ml := range mls { |
2471
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
582 binary.Write(buf, binary.LittleEndian, wkb.NDR) |
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
583 binary.Write(buf, binary.LittleEndian, wkb.LineStringZ) |
924
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
584 binary.Write(buf, binary.LittleEndian, uint32(len(ml))) |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
585 for _, p := range ml { |
924
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
586 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.X)) |
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
587 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Y)) |
c8146132059e
Precalculate WKB size for MultiLineStringZ to avoid reallocations.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
824
diff
changeset
|
588 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Z)) |
727
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
589 } |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
590 } |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
591 |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
592 return buf.Bytes() |
41c8dc61f38f
Moved octree loading stuff to octree package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
726
diff
changeset
|
593 } |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
594 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
595 // AsWKB2D returns the WKB representation of the given multi line string |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
596 // leaving the z component out. |
925
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
597 func (mls MultiLineStringZ) AsWKB2D() []byte { |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
598 |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
599 // pre-calculate size to avoid reallocations. |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
600 size := 1 + 4 + 4 |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
601 for _, ml := range mls { |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
602 size += 1 + 4 + 4 + len(ml)*2*8 |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
603 } |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
604 |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
605 buf := bytes.NewBuffer(make([]byte, 0, size)) |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
606 |
2471
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
607 binary.Write(buf, binary.LittleEndian, wkb.NDR) |
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
608 binary.Write(buf, binary.LittleEndian, wkb.MultiLineString) |
925
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
609 binary.Write(buf, binary.LittleEndian, uint32(len(mls))) |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
610 |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
611 for _, ml := range mls { |
2471
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
612 binary.Write(buf, binary.LittleEndian, wkb.NDR) |
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
613 binary.Write(buf, binary.LittleEndian, wkb.LineString) |
925
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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changeset
|
614 binary.Write(buf, binary.LittleEndian, uint32(len(ml))) |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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diff
changeset
|
615 for _, p := range ml { |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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diff
changeset
|
616 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.X)) |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
617 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Y)) |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
618 } |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
619 } |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
620 |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
621 return buf.Bytes() |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
622 } |
15bf101e1522
Send 2D X/Y vertices to the database directly instead of sending 3D data and dropping the Z value afterwards.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
924
diff
changeset
|
623 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
624 // Join joins two lines leaving the first of the second out. |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
625 func (ls LineStringZ) Join(other LineStringZ) LineStringZ { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
626 nline := make(LineStringZ, len(ls)+len(other)-1) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
627 copy(nline, ls) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
628 copy(nline[len(ls):], other[1:]) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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diff
changeset
|
629 return nline |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
630 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
631 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
632 // Merge merges line segments of a given multi line string |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
633 // by finding common start and end vertices. |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
634 func (mls MultiLineStringZ) Merge() MultiLineStringZ { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
635 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
636 var out MultiLineStringZ |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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diff
changeset
|
637 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
638 min := Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64} |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
639 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
640 for _, line := range mls { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
641 for _, v := range line { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
642 min.Minimize(v) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
643 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
644 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
645 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
646 type point struct { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
647 x int64 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
648 y int64 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
649 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
650 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
651 const precision = 1e7 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
652 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
653 quant := func(v Vertex) point { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
654 return point{ |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
655 x: int64(math.Round((v.X - min.X) * precision)), |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
656 y: int64(math.Round((v.Y - min.Y) * precision)), |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
657 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
658 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
659 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
660 heads := make(map[point]*[]LineStringZ) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
661 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
662 for _, line := range mls { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
663 if len(line) < 2 { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
664 out = append(out, line) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
665 continue |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
666 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
667 head := quant(line[0]) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
668 tail := quant(line[len(line)-1]) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
669 if head == tail { // its already a ring |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
670 out = append(out, line) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
671 continue |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
672 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
673 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
674 if hs := heads[tail]; hs != nil { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
675 l := len(*hs) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
676 last := (*hs)[l-1] |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
677 if l == 1 { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
678 delete(heads, tail) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
679 } else { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
680 (*hs)[l-1] = nil |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
681 *hs = (*hs)[:l-1] |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
682 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
683 line = line.Join(last) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
684 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
685 if head == quant(line[len(line)-1]) { // its a ring |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
686 out = append(out, line) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
687 continue |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
688 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
689 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
690 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
691 if hs := heads[head]; hs != nil { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
692 *hs = append(*hs, line) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
693 } else { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
694 heads[head] = &[]LineStringZ{line} |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
695 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
696 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
697 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
698 again: |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
699 for head, lines := range heads { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
700 for i, line := range *lines { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
701 tail := quant(line[len(line)-1]) |
940
be7b83638ec8
Simplified line merging in generating contour lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
928
diff
changeset
|
702 for hs := heads[tail]; hs != nil && len(*hs) > 0; hs = heads[tail] { |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
703 l := len(*hs) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
704 last := (*hs)[l-1] |
940
be7b83638ec8
Simplified line merging in generating contour lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
928
diff
changeset
|
705 (*hs)[l-1] = nil |
be7b83638ec8
Simplified line merging in generating contour lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
928
diff
changeset
|
706 *hs = (*hs)[:l-1] |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
707 line = line.Join(last) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
708 |
940
be7b83638ec8
Simplified line merging in generating contour lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
928
diff
changeset
|
709 if tail = quant(line[len(line)-1]); head == tail { // its a ring |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
710 out = append(out, line) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
711 // remove from current lines |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
712 copy((*lines)[i:], (*lines)[i+1:]) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
713 (*lines)[len(*lines)-1] = nil |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
714 *lines = (*lines)[:len(*lines)-1] |
940
be7b83638ec8
Simplified line merging in generating contour lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
928
diff
changeset
|
715 goto again |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
716 } |
940
be7b83638ec8
Simplified line merging in generating contour lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
928
diff
changeset
|
717 // overwrite in current lines |
be7b83638ec8
Simplified line merging in generating contour lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
928
diff
changeset
|
718 (*lines)[i] = line |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
719 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
720 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
721 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
722 |
988
7dfd3db94e6d
In preparation of persisting import jobs logging is done through an interface.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
968
diff
changeset
|
723 // rings := len(out) |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
724 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
725 // The rest are open line strings. |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
726 for _, lines := range heads { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
727 for _, line := range *lines { |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
728 out = append(out, line) |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
729 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
730 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
731 |
988
7dfd3db94e6d
In preparation of persisting import jobs logging is done through an interface.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
968
diff
changeset
|
732 // log.Printf("segments before/after merge: %d/%d (%d rings)\n", |
7dfd3db94e6d
In preparation of persisting import jobs logging is done through an interface.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
968
diff
changeset
|
733 // len(mls), len(out), rings) |
928
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
734 |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
735 return out |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
736 } |
0a0013fbda4a
octree2contour: Merge multi linestrings in user land before sending them to database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
925
diff
changeset
|
737 |
2492
10681749371d
Implemented the BBox/clipping polygon test. TODO: triangle/clipping polygon test.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2483
diff
changeset
|
738 func (a Box2D) Rect(interface{}) ([]float64, []float64) { |
10681749371d
Implemented the BBox/clipping polygon test. TODO: triangle/clipping polygon test.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2483
diff
changeset
|
739 return []float64{a.X1, a.Y1}, []float64{a.X2, a.Y2} |
10681749371d
Implemented the BBox/clipping polygon test. TODO: triangle/clipping polygon test.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2483
diff
changeset
|
740 } |
10681749371d
Implemented the BBox/clipping polygon test. TODO: triangle/clipping polygon test.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2483
diff
changeset
|
741 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
742 // Intersects checks if two Box2Ds intersect. |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
743 func (a Box2D) Intersects(b Box2D) bool { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
744 return !(a.X2 < a.X1 || a.X2 < b.X1 || |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
745 a.Y2 < a.Y1 || a.Y2 < b.Y1) |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
746 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
747 |
2466
a1e751c08c56
Calculate difference on single core.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1692
diff
changeset
|
748 func (a Box2D) Contains(x, y float64) bool { |
a1e751c08c56
Calculate difference on single core.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1692
diff
changeset
|
749 return a.X1 <= x && x <= a.X2 && |
a1e751c08c56
Calculate difference on single core.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1692
diff
changeset
|
750 a.Y1 <= y && y <= a.Y2 |
a1e751c08c56
Calculate difference on single core.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1692
diff
changeset
|
751 } |
a1e751c08c56
Calculate difference on single core.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1692
diff
changeset
|
752 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
753 // Xi returns the i-th x component. |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
754 func (a Box2D) Xi(i int) float64 { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
755 if i == 0 { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
756 return a.X1 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
757 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
758 return a.X2 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
759 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
760 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
761 // Yi returns the i-th y component. |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
762 func (a Box2D) Yi(i int) float64 { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
763 if i == 0 { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
764 return a.Y1 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
765 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
766 return a.Y2 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
767 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
768 |
2512
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
769 func (a Box2D) Union(b Box2D) Box2D { |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
770 return Box2D{ |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
771 X1: math.Min(a.X1, b.X1), |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
772 Y1: math.Min(a.Y1, b.Y1), |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
773 X2: math.Max(a.X2, b.X2), |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
774 Y2: math.Max(a.Y2, b.Y2), |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
775 } |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
776 } |
2768f74d54ab
Added an STRTree for the triangulation. Should be better suited for filtering out the clipped triangles.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2494
diff
changeset
|
777 |
3639
2a4216c81e7b
Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2572
diff
changeset
|
778 func (a Box2D) Area() float64 { |
2a4216c81e7b
Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2572
diff
changeset
|
779 return (a.X2 - a.X1) * (a.Y2 - a.Y1) |
2a4216c81e7b
Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2572
diff
changeset
|
780 } |
2a4216c81e7b
Extract the removed triangles from first triangulation, too. Useful to build a artifical DEM for second pass.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2572
diff
changeset
|
781 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
782 // NewPlane2D creates a new Plane2D from two given points. |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
783 func NewPlane2D(x1, y1, x2, y2 float64) Plane2D { |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
784 b := x2 - x1 |
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
785 a := -(y2 - y1) |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
786 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
787 l := math.Sqrt(a*a + b*b) |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
788 a /= l |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
789 b /= l |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
790 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
791 // a*x1 + b*y1 + c = 0 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
792 c := -(a*x1 + b*y1) |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
793 return Plane2D{a, b, c} |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
794 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
795 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
796 // Eval determines the distance of a given point |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
797 // from the plane. The sign of the result indicates |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
798 // the sideness. |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
799 func (p Plane2D) Eval(x, y float64) float64 { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
800 return p.A*x + p.B*y + p.C |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
801 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
802 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
803 const epsPlane = 1e-5 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
804 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
805 func sides(s int, x float64) int { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
806 if math.Signbit(x) { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
807 return s | 2 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
808 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
809 return s | 1 |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
810 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
811 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
812 // IntersectsPlane checks if a Box2D intersects with |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
813 // a given Plane2D. |
774
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
814 func (a Box2D) IntersectsPlane(p Plane2D) bool { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
815 var s int |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
816 for i := 0; i < 2; i++ { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
817 x := a.Xi(i) |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
818 for j := 0; j < 2; j++ { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
819 y := a.Yi(j) |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
820 v := p.Eval(x, y) |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
821 if math.Abs(v) < epsPlane { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
822 //log.Printf("on line") |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
823 return true |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
824 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
825 if s = sides(s, v); s == 3 { |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
826 //log.Printf("... on both sides (djt)") |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
827 return true |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
828 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
829 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
830 } |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
831 //log.Printf("side: %d\n", s) |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
832 return false |
c55771b7c502
Moved Box2D and Plane2D into vertex.go and made to API public.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
769
diff
changeset
|
833 } |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
834 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
835 // Cross calculates the cross product of two vertices. |
1329
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
836 func (v Vertex) Cross(w Vertex) Vertex { |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
837 return Vertex{ |
1329
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
838 v.Y*w.Z - v.Z*w.Y, |
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
839 v.Z*w.X - v.X*w.Z, |
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
840 v.X*w.Y - v.Y*w.X, |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
841 } |
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
842 } |
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
843 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
844 // Intersection calcultes the 2D intersection point of |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
845 // two Plane2Ds. If they do not intersect the returned |
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
846 // bool flags is set to false. |
1329
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
847 func (p Plane2D) Intersection(o Plane2D) (float64, float64, bool) { |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
848 |
1329
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
849 u1 := Vertex{p.A, p.B, p.C} |
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
850 u2 := Vertex{o.A, o.B, o.C} |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
851 |
1329
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
852 plane := u1.Cross(u2) |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
853 |
1329
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
854 if plane.Z == 0 { |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
855 return 0, 0, false |
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
856 } |
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
857 |
1329
ea2143adc6d3
Named method recievers consistently to make golint happy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1017
diff
changeset
|
858 return plane.X / plane.Z, plane.Y / plane.Z, true |
778
9be20bd0f131
Fixed a bug with 2d planes (lines) found while working on line intersections.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
774
diff
changeset
|
859 } |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
860 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
861 // VerticalLine is a 2D line segment. |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
862 type VerticalLine struct { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
863 x1 float64 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
864 y1 float64 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
865 x2 float64 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
866 y2 float64 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
867 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
868 line Plane2D |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
869 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
870 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
871 // NewVerticalLine creates a new 2D line segment. |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
872 func NewVerticalLine(x1, y1, x2, y2 float64) *VerticalLine { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
873 return &VerticalLine{ |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
874 x1: x1, |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
875 y1: y1, |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
876 x2: x2, |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
877 y2: y2, |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
878 line: NewPlane2D(x1, y1, x2, y2), |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
879 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
880 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
881 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
882 func onPlane(x float64) bool { return math.Abs(x) < epsPlane } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
883 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
884 func relative(v1, v2 Vertex) func(x, y float64) float64 { |
795
bd5f38eb6153
Vertical Triangle intersection: Fixed function to determine where intersection point
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
792
diff
changeset
|
885 ls := linearScale(v1.X, v1.Y, v2.X, v2.Y) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
886 return func(x, y float64) float64 { |
795
bd5f38eb6153
Vertical Triangle intersection: Fixed function to determine where intersection point
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
792
diff
changeset
|
887 return ls(Vertex{x, y, 0}) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
888 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
889 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
890 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
891 func interpolate(a, b float64) func(float64) float64 { |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
892 return func(x float64) float64 { |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
893 return (b-a)*x + a |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
894 } |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
895 } |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
896 |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
897 func linear(v1, v2 Vertex) func(t float64) Vertex { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
898 return func(t float64) Vertex { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
899 return Vertex{ |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
900 (v2.X-v1.X)*t + v1.X, |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
901 (v2.Y-v1.Y)*t + v1.Y, |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
902 (v2.Z-v1.Z)*t + v1.Z, |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
903 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
904 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
905 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
906 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
907 func inRange(a float64) bool { return 0 <= a && a <= 1 } |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
908 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
909 // Intersection intersects a line segment with a triangle. |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
910 func (vl *VerticalLine) Intersection(t *Triangle) LineStringZ { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
911 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
912 var out LineStringZ |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
913 |
815
01019d4c8359
Cross section: Made triangle intersection less spammy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
813
diff
changeset
|
914 //defer func() { log.Printf("length out: %d\n", len(out)) }() |
796
0cc97135717c
More fixes to vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
795
diff
changeset
|
915 |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
916 edges: |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
917 for i := 0; i < 3 && len(out) < 2; i++ { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
918 j := (i + 1) % 3 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
919 edge := NewPlane2D(t[i].X, t[i].Y, t[j].X, t[j].Y) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
920 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
921 s1 := edge.Eval(vl.x1, vl.y1) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
922 s2 := edge.Eval(vl.x2, vl.y2) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
923 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
924 o1 := onPlane(s1) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
925 o2 := onPlane(s2) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
926 |
815
01019d4c8359
Cross section: Made triangle intersection less spammy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
813
diff
changeset
|
927 // log.Printf("s1, s2: %t %t (%f %f)\n", o1, o2, s1, s2) |
795
bd5f38eb6153
Vertical Triangle intersection: Fixed function to determine where intersection point
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
792
diff
changeset
|
928 |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
929 switch { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
930 case o1 && o2: |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
931 pos := relative(t[i], t[j]) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
932 t1 := pos(vl.x1, vl.y1) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
933 t2 := pos(vl.x2, vl.y2) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
934 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
935 r1 := inRange(t1) |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
936 r2 := inRange(t2) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
937 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
938 switch { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
939 case r1 && r2: |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
940 lin := linear(t[i], t[j]) |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
941 out = append(out, lin(t1), lin(t2)) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
942 return out |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
943 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
944 case !r1 && !r2: // the hole edge |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
945 out = append(out, t[i], t[j]) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
946 return out |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
947 case !r1: |
789
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
948 if t1 < 0 { |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
949 // below first -> clip by first |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
950 lin := linear(t[i], t[j]) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
951 out = append(out, t[i], lin(t2)) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
952 } else { |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
953 // above second -> clip by second |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
954 lin := linear(t[i], t[j]) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
955 out = append(out, lin(t2), t[j]) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
956 } |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
957 return out |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
958 case !r2: |
789
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
959 if t2 < 0 { |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
960 // below first -> clip by first |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
961 lin := linear(t[i], t[j]) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
962 out = append(out, t[i], lin(t1)) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
963 } else { |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
964 // above second -> clip by second |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
965 lin := linear(t[i], t[j]) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
966 out = append(out, lin(t1), t[j]) |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
967 } |
d43e61044ad8
Fill in last remaining corner cases in vertical triangle interpolation.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
788
diff
changeset
|
968 return out |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
969 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
970 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
971 case o1: |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
972 t1 := relative(t[i], t[j])(vl.x1, vl.y1) |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
973 if !inRange(t1) { |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
974 continue edges |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
975 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
976 out = append(out, linear(t[i], t[j])(t1)) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
977 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
978 case o2: |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
979 t2 := relative(t[i], t[j])(vl.x2, vl.y2) |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
980 if !inRange(t2) { |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
981 continue edges |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
982 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
983 out = append(out, linear(t[i], t[j])(t2)) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
984 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
985 default: |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
986 x, y, intersects := vl.line.Intersection(edge) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
987 if !intersects { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
988 continue edges |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
989 } |
795
bd5f38eb6153
Vertical Triangle intersection: Fixed function to determine where intersection point
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
792
diff
changeset
|
990 |
815
01019d4c8359
Cross section: Made triangle intersection less spammy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
813
diff
changeset
|
991 // log.Println("Intersection -----------------------------") |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
992 t1 := relative(t[i], t[j])(x, y) |
815
01019d4c8359
Cross section: Made triangle intersection less spammy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
813
diff
changeset
|
993 // log.Printf("relative pos: %f\n", t1) |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
994 if !inRange(t1) { |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
995 continue edges |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
996 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
997 |
815
01019d4c8359
Cross section: Made triangle intersection less spammy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
813
diff
changeset
|
998 // log.Println("valid ***************") |
795
bd5f38eb6153
Vertical Triangle intersection: Fixed function to determine where intersection point
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
792
diff
changeset
|
999 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1000 z := interpolate(t[j].Z, t[i].Z)(t1) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1001 n := Vertex{x, y, z} |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1002 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1003 if math.Signbit(s1) != math.Signbit(s2) { |
815
01019d4c8359
Cross section: Made triangle intersection less spammy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
813
diff
changeset
|
1004 // log.Println("\ton different sides") |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1005 // different sides -> vertex on edge. |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1006 out = append(out, n) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1007 } else { // same side -> inside. Find peer |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1008 if len(out) > 0 { // we already have our peer |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1009 out = append(out, n) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1010 return out |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1011 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1012 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1013 for k := 0; k < 3; k++ { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1014 if k == i { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1015 continue |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1016 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1017 l := (k + 1) % 3 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1018 other := NewPlane2D(t[k].X, t[k].Y, t[l].X, t[l].Y) |
813
1a808929c2c5
Cross sections: Fixed problem that certain inputs don't deliver data.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
796
diff
changeset
|
1019 xo, yo, intersects := vl.line.Intersection(other) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1020 if !intersects { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1021 continue |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1022 } |
813
1a808929c2c5
Cross sections: Fixed problem that certain inputs don't deliver data.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
796
diff
changeset
|
1023 t2 := relative(t[k], t[l])(xo, yo) |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1024 if !inRange(t2) { |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1025 continue |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1026 } |
813
1a808929c2c5
Cross sections: Fixed problem that certain inputs don't deliver data.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
796
diff
changeset
|
1027 zo := interpolate(t[k].Z, t[l].Z)(t2) |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1028 |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1029 m := Vertex{xo, yo, zo} |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1030 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1031 var xn, yn, xf, yf float64 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1032 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1033 // Which is nearer to current edge? |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1034 if math.Abs(s1) < math.Abs(s2) { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1035 xn, yn = vl.x1, vl.y1 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1036 xf, yf = vl.x2, vl.y2 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1037 } else { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1038 xn, yn = vl.x2, vl.y2 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1039 xf, yf = vl.x1, vl.y1 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1040 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1041 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1042 if onPlane(other.Eval(xn, yn)) { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1043 // triangle intersect in only point |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1044 // treat as no intersection |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1045 break edges |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1046 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1047 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1048 pos := relative(n, m) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1049 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1050 tzn := pos(xn, yn) |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1051 tzf := pos(xf, yf) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1052 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1053 if !inRange(tzn) { |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1054 // if near is out of range far is, too. |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1055 return out |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1056 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1057 |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1058 lin := interpolate(n.Z, m.Z) |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1059 |
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1060 if inRange(tzf) { |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1061 m.X = xf |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1062 m.Y = yf |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1063 m.Z = lin(tzf) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1064 } // else m is clipping |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1065 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1066 n.X = xn |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1067 n.Y = yn |
788
9f3a4a60dc04
Cleaned up interpolation mess in vertical triangle intersection.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
787
diff
changeset
|
1068 n.Z = lin(tzn) |
787
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1069 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1070 out = append(out, n, m) |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1071 return out |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1072 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1073 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1074 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1075 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1076 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1077 // supress single point touches. |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1078 if len(out) == 1 { |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1079 out = out[:0] |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1080 } |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1081 |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1082 return out |
3d927e06b92c
Triangle intersection. WIP. Currently interpolation is messed up.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
778
diff
changeset
|
1083 } |
959
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1084 |
1692
f4dcbe8941a1
Octree: Resolved the remaing golint issues with this package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1691
diff
changeset
|
1085 // AsWKB returns a WKB representation of the given point cloud. |
959
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1086 func (mpz MultiPointZ) AsWKB() []byte { |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1087 size := 1 + 4 + 4 + len(mpz)*(1+4+3*8) |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1088 |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1089 buf := bytes.NewBuffer(make([]byte, 0, size)) |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1090 |
2471
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
1091 binary.Write(buf, binary.LittleEndian, wkb.NDR) |
63475c8e710e
Moved WKB constants to own package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2466
diff
changeset
|
1092 binary.Write(buf, binary.LittleEndian, wkb.MultiPointZ) |
959
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1093 binary.Write(buf, binary.LittleEndian, uint32(len(mpz))) |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1094 |
2472
db0e4ab57977
Turn new point cloud into WKB form of MultiPointZ.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2471
diff
changeset
|
1095 perPoint := bytes.NewBuffer(make([]byte, 0, 1+4)) |
db0e4ab57977
Turn new point cloud into WKB form of MultiPointZ.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2471
diff
changeset
|
1096 binary.Write(perPoint, binary.LittleEndian, wkb.NDR) |
db0e4ab57977
Turn new point cloud into WKB form of MultiPointZ.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2471
diff
changeset
|
1097 binary.Write(perPoint, binary.LittleEndian, wkb.PointZ) |
db0e4ab57977
Turn new point cloud into WKB form of MultiPointZ.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2471
diff
changeset
|
1098 hdr := perPoint.Bytes() |
db0e4ab57977
Turn new point cloud into WKB form of MultiPointZ.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2471
diff
changeset
|
1099 |
959
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1100 for _, p := range mpz { |
2472
db0e4ab57977
Turn new point cloud into WKB form of MultiPointZ.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2471
diff
changeset
|
1101 buf.Write(hdr) |
959
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1102 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.X)) |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1103 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Y)) |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1104 binary.Write(buf, binary.LittleEndian, math.Float64bits(p.Z)) |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1105 } |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1106 |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1107 return buf.Bytes() |
6ab012d0f0c2
Started with writing an importer job for sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
940
diff
changeset
|
1108 } |
2529
45d51a49f191
SR import: Use own triangulation and clipping when importing sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2512
diff
changeset
|
1109 |
45d51a49f191
SR import: Use own triangulation and clipping when importing sounding results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
2512
diff
changeset
|
1110 func (mpz *MultiPointZ) FromWKB(data []byte) error { |
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1111 |
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1112 r := bytes.NewReader(data) |
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1113 |
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1114 endian, err := r.ReadByte() |
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1115 |
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1116 var order binary.ByteOrder |
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1117 |
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1118 switch { |
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1119 case err != nil: |
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1120 return err |
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1121 case endian == wkb.NDR: |
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1122 order = binary.LittleEndian |
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1123 case endian == wkb.XDR: |
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1124 order = binary.BigEndian |
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1125 default: |
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1126 return fmt.Errorf("unknown byte order %x", endian) |
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1127 } |
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1128 |
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1129 var geomType uint32 |
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1130 err = binary.Read(r, order, &geomType) |
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1131 |
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1132 switch { |
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1133 case err != nil: |
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1134 return err |
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1135 case geomType != wkb.MultiPointZ: |
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1136 return fmt.Errorf("unknown geometry type %x", geomType) |
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1137 } |
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1138 |
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1139 var numPoints uint32 |
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1140 if err := binary.Read(r, order, &numPoints); err != nil { |
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1141 return err |
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1142 } |
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1143 |
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1144 points := make(MultiPointZ, numPoints) |
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1145 |
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1146 for i := range points { |
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1147 endian, err = r.ReadByte() |
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1148 |
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1149 switch { |
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1150 case err != nil: |
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1151 return err |
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1152 case endian == wkb.NDR: |
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1153 order = binary.LittleEndian |
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1154 case endian == wkb.XDR: |
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1155 order = binary.BigEndian |
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1156 default: |
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1157 return fmt.Errorf("unknown byte order %x", endian) |
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1158 } |
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1159 |
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1160 err = binary.Read(r, order, &geomType) |
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1161 |
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1162 switch { |
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1163 case err != nil: |
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1164 return err |
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1165 case geomType != wkb.PointZ: |
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1166 return fmt.Errorf("unknown geometry type %x", geomType) |
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1167 } |
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1168 |
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1169 var x, y, z uint64 |
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1170 if err = binary.Read(r, order, &x); err != nil { |
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1171 return err |
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1172 } |
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1173 if err = binary.Read(r, order, &y); err != nil { |
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1174 return err |
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1175 } |
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1176 if err = binary.Read(r, order, &z); err != nil { |
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1177 return err |
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1178 } |
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1179 points[i] = Vertex{ |
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1180 X: math.Float64frombits(x), |
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1181 Y: math.Float64frombits(y), |
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1182 Z: math.Float64frombits(z), |
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1183 } |
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1184 } |
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1185 |
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1186 *mpz = points |
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1187 |
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1188 return nil |
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1189 } |