Mercurial > gemma
annotate pkg/mesh/raster.go @ 5520:05db984d3db1
Improve performance of bottleneck area calculation
Avoid buffer calculations by replacing them with simple distance comparisons
and calculate the boundary of the result geometry only once per iteration.
In some edge cases with very large numbers of iterations, this reduced
the runtime of a bottleneck import by a factor of more than twenty.
author | Tom Gottfried <tom@intevation.de> |
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date | Thu, 21 Oct 2021 19:50:39 +0200 |
parents | 5f47eeea988d |
children | 1222b777f51f |
rev | line source |
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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) 2019 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 |
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14 package mesh |
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15 |
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16 import ( |
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17 "math" |
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18 "runtime" |
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19 "sync" |
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20 "time" |
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21 |
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22 "github.com/fogleman/contourmap" |
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23 |
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24 "gemma.intevation.de/gemma/pkg/common" |
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25 "gemma.intevation.de/gemma/pkg/log" |
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26 "gemma.intevation.de/gemma/pkg/wkb" |
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27 ) |
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28 |
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29 type Raster struct { |
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30 BBox Box2D |
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31 CellSize float64 |
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32 XCells int |
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33 YCells int |
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34 Cells []float64 |
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35 } |
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36 |
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37 const noData = -math.MaxFloat64 |
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38 |
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39 func NewRaster(bbox Box2D, cellSize float64) *Raster { |
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40 |
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41 width, height := bbox.Size() |
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42 |
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43 log.Infof("raster extent: %.2f / %.2f", width, height) |
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44 |
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45 xCells := int(math.Ceil(width / cellSize)) |
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46 yCells := int(math.Ceil(height / cellSize)) |
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47 |
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48 log.Infof("raster size: %d / %d\n", xCells, yCells) |
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49 |
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50 size := (xCells + 2) * (yCells + 2) |
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51 cells := make([]float64, size) |
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52 for i := range cells { |
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53 cells[i] = noData |
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54 } |
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55 return &Raster{ |
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56 BBox: bbox, |
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57 CellSize: cellSize, |
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58 XCells: xCells, |
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59 YCells: yCells, |
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60 Cells: cells, |
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61 } |
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62 } |
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63 |
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64 func (r *Raster) Rasterize(eval func(float64, float64) (float64, bool)) { |
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65 var wg sync.WaitGroup |
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66 |
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67 rows := make(chan int) |
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68 |
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69 rasterRow := func() { |
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70 defer wg.Done() |
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71 quat := 0.25 * r.CellSize |
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72 for i := range rows { |
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73 pos := (i+1)*(r.XCells+2) + 1 |
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74 row := r.Cells[pos : pos+r.XCells] |
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75 py := r.BBox.Y1 + float64(i)*r.CellSize + r.CellSize/2 |
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76 px := r.BBox.X1 + r.CellSize/2 |
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77 y1 := py - quat |
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78 y2 := py + quat |
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79 for j := range row { |
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80 var n int |
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81 var sum float64 |
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82 |
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83 if v, ok := eval(px-quat, y1); ok { |
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84 sum = v |
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85 n = 1 |
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86 } |
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87 if v, ok := eval(px-quat, y2); ok { |
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88 sum += v |
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89 n++ |
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90 } |
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91 if v, ok := eval(px+quat, y1); ok { |
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92 sum += v |
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93 n++ |
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94 } |
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95 if v, ok := eval(px+quat, y2); ok { |
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96 sum += v |
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97 n++ |
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98 } |
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99 |
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100 if n > 0 { |
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101 row[j] = sum / float64(n) |
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102 } |
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103 px += r.CellSize |
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changeset
|
104 } |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
105 } |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
106 } |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
107 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
108 for n := runtime.NumCPU(); n >= 1; n-- { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
109 wg.Add(1) |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
110 go rasterRow() |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
111 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
112 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
113 for i := 0; i < r.YCells; i++ { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
114 rows <- i |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
115 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
116 close(rows) |
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1a89084163d5
Fixed data race in diff calculation by adding two forgotten waitgroup waits.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
117 wg.Wait() |
4768
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
118 } |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
119 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
120 func (r *Raster) Diff(eval func(float64, float64) (float64, bool)) { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
121 var wg sync.WaitGroup |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
122 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
123 rows := make(chan int) |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
124 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
125 rasterRow := func() { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
126 defer wg.Done() |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
127 quat := 0.25 * r.CellSize |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
128 for i := range rows { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
129 pos := (i+1)*(r.XCells+2) + 1 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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|
130 row := r.Cells[pos : pos+r.XCells] |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
131 py := r.BBox.Y1 + float64(i)*r.CellSize + r.CellSize/2 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
132 px := r.BBox.X1 + r.CellSize/2 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
133 y1 := py - quat |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
134 y2 := py + quat |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
135 for j, old := range row { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
136 // only diff where values |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
137 if old == noData { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
138 px += r.CellSize |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
139 continue |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
140 } |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
141 var n int |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
142 var sum float64 |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
143 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
144 if v, ok := eval(px-quat, y1); ok { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
145 sum = v |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
146 n = 1 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
147 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
148 if v, ok := eval(px-quat, y2); ok { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
149 sum += v |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
150 n++ |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
151 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
152 if v, ok := eval(px+quat, y1); ok { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
153 sum += v |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
154 n++ |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
155 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
156 if v, ok := eval(px+quat, y2); ok { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
157 sum += v |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
158 n++ |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
159 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
160 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
161 if n > 0 { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
162 row[j] -= sum / float64(n) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
163 } else { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
164 row[j] = noData |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
165 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
166 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
167 px += r.CellSize |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
168 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
169 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
170 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
171 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
172 for n := runtime.NumCPU(); n >= 1; n-- { |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
173 wg.Add(1) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
174 go rasterRow() |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
175 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
176 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
177 for i := 0; i < r.YCells; i++ { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
178 rows <- i |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
179 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
180 close(rows) |
5469
1a89084163d5
Fixed data race in diff calculation by adding two forgotten waitgroup waits.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
5412
diff
changeset
|
181 wg.Wait() |
4768
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
182 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
183 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
184 func (r *Raster) ZExtent() (float64, float64, bool) { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
185 min, max := math.MaxFloat64, -math.MaxFloat64 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
186 for _, v := range r.Cells { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
187 if v == noData { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
188 continue |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
189 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
190 if v < min { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
191 min = v |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
192 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
193 if v > max { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
194 max = v |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
195 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
196 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
197 return min, max, min != math.MaxFloat64 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
198 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
199 |
5412
34bc6041e61e
Added a type for class breaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
4827
diff
changeset
|
200 func (r *Raster) Trace(heights ClassBreaks) []wkb.MultiPolygonGeom { |
4768
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
201 start := time.Now() |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
202 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
203 tracer := contourmap.FromFloat64s(r.XCells+2, r.YCells+2, r.Cells) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
204 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
205 areas := make([]wkb.MultiPolygonGeom, len(heights)) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
206 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
207 reprojX := common.Linear(0.5, r.BBox.X1, 1.5, r.BBox.X1+r.CellSize) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
208 reprojY := common.Linear(0.5, r.BBox.Y1, 1.5, r.BBox.Y1+r.CellSize) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
209 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
210 var wg sync.WaitGroup |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
211 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
212 cnts := make(chan int) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
213 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
214 doContours := func() { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
215 defer wg.Done() |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
216 for hIdx := range cnts { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
217 if c := tracer.Contours(heights[hIdx]); len(c) > 0 { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
218 areas[hIdx] = buildMultipolygon(c, reprojX, reprojY) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
219 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
220 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
221 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
222 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
223 for n := runtime.NumCPU(); n >= 1; n-- { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
224 wg.Add(1) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
225 go doContours() |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
226 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
227 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
228 for i := range heights { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
229 cnts <- i |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
230 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
231 close(cnts) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
232 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
233 wg.Wait() |
5490
5f47eeea988d
Use own logging package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
5469
diff
changeset
|
234 log.Infof("Tracing areas took %v\n", time.Since(start)) |
4768
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
235 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
236 return areas |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
237 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
238 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
239 type contour []contourmap.Point |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
240 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
241 type bboxNode struct { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
242 box Box2D |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
243 cnt contour |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
244 children []*bboxNode |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
245 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
246 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
247 func (cnt contour) contains(o contour) bool { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
248 return contains(cnt, o[0].X, o[0].Y) || |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
249 contains(cnt, o[len(o)/2].X, o[len(o)/2].Y) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
250 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
251 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
252 func (cnt contour) length() int { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
253 return len(cnt) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
254 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
255 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
256 func (cnt contour) point(i int) (float64, float64) { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
257 return cnt[i].X, cnt[i].Y |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
258 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
259 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
260 func (cnt contour) bbox() Box2D { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
261 minX, minY := math.MaxFloat64, math.MaxFloat64 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
262 maxX, maxY := -math.MaxFloat64, -math.MaxFloat64 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
263 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
264 for _, p := range cnt { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
265 if p.X < minX { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
266 minX = p.X |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
267 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
268 if p.X > maxX { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
269 maxX = p.X |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
270 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
271 if p.Y < minY { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
272 minY = p.Y |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
273 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
274 if p.Y > maxY { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
275 maxY = p.Y |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
276 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
277 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
278 return Box2D{X1: minX, X2: maxX, Y1: minY, Y2: maxY} |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
279 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
280 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
281 func (bn *bboxNode) insert(cnt contour, box Box2D) { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
282 // check if children are inside new |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
283 var nr *bboxNode |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
284 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
285 for i, r := range bn.children { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
286 if r.box.Inside(box) && cnt.contains(r.cnt) { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
287 if nr == nil { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
288 nr = &bboxNode{box: box, cnt: cnt} |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
289 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
290 nr.children = append(nr.children, r) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
291 bn.children[i] = nil |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
292 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
293 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
294 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
295 // we have a new child |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
296 if nr != nil { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
297 // compact the list |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
298 for i := len(bn.children) - 1; i >= 0; i-- { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
299 if bn.children[i] == nil { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
300 if i < len(bn.children)-1 { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
301 copy(bn.children[i:], bn.children[i+1:]) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
302 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
303 bn.children[len(bn.children)-1] = nil |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
304 bn.children = bn.children[:len(bn.children)-1] |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
305 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
306 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
307 bn.children = append(bn.children, nr) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
308 return |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
309 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
310 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
311 // check if new is inside an old |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
312 for _, r := range bn.children { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
313 if box.Inside(r.box) && r.cnt.contains(cnt) { |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
314 r.insert(cnt, box) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
315 return |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
316 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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317 } |
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Morph differences: Directly raster A and subtract B as a raster.
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318 |
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319 // its a new child node. |
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320 nr = &bboxNode{box: box, cnt: cnt} |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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321 bn.children = append(bn.children, nr) |
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Morph differences: Directly raster A and subtract B as a raster.
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322 } |
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Morph differences: Directly raster A and subtract B as a raster.
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323 |
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Morph differences: Directly raster A and subtract B as a raster.
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324 func (bn *bboxNode) insertRoot(cnt contour) { |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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325 bn.insert(cnt, cnt.bbox()) |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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326 } |
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Morph differences: Directly raster A and subtract B as a raster.
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327 |
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Morph differences: Directly raster A and subtract B as a raster.
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328 type bboxOutFunc func(contour, []contour) |
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Morph differences: Directly raster A and subtract B as a raster.
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329 |
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Morph differences: Directly raster A and subtract B as a raster.
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330 func (bn *bboxNode) generate(out bboxOutFunc) { |
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Morph differences: Directly raster A and subtract B as a raster.
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331 |
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Morph differences: Directly raster A and subtract B as a raster.
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332 var grands []*bboxNode |
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Morph differences: Directly raster A and subtract B as a raster.
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333 |
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Morph differences: Directly raster A and subtract B as a raster.
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334 holes := make([]contour, len(bn.children)) |
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Morph differences: Directly raster A and subtract B as a raster.
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335 |
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Morph differences: Directly raster A and subtract B as a raster.
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336 for i, ch := range bn.children { |
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Morph differences: Directly raster A and subtract B as a raster.
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337 holes[i] = ch.cnt |
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Morph differences: Directly raster A and subtract B as a raster.
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338 grands = append(grands, ch.children...) |
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Morph differences: Directly raster A and subtract B as a raster.
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339 } |
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Morph differences: Directly raster A and subtract B as a raster.
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340 out(bn.cnt, holes) |
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Morph differences: Directly raster A and subtract B as a raster.
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341 |
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Morph differences: Directly raster A and subtract B as a raster.
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342 // the grand children are new polygons. |
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Morph differences: Directly raster A and subtract B as a raster.
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343 for _, grand := range grands { |
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Morph differences: Directly raster A and subtract B as a raster.
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344 grand.generate(out) |
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Morph differences: Directly raster A and subtract B as a raster.
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345 } |
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Morph differences: Directly raster A and subtract B as a raster.
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346 } |
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Morph differences: Directly raster A and subtract B as a raster.
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347 |
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348 func (bn *bboxNode) generateRoot(out bboxOutFunc) { |
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Morph differences: Directly raster A and subtract B as a raster.
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349 for _, r := range bn.children { |
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Morph differences: Directly raster A and subtract B as a raster.
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350 r.generate(out) |
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351 } |
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Morph differences: Directly raster A and subtract B as a raster.
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352 } |
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Morph differences: Directly raster A and subtract B as a raster.
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353 |
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354 func buildMultipolygon( |
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355 cnts []contourmap.Contour, |
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356 reprojX, reprojY func(float64) float64, |
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357 ) wkb.MultiPolygonGeom { |
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358 |
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Morph differences: Directly raster A and subtract B as a raster.
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359 var forest bboxNode |
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360 |
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Morph differences: Directly raster A and subtract B as a raster.
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361 for _, cnt := range cnts { |
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Morph differences: Directly raster A and subtract B as a raster.
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362 forest.insertRoot(contour(cnt)) |
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Morph differences: Directly raster A and subtract B as a raster.
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363 } |
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Morph differences: Directly raster A and subtract B as a raster.
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364 |
5490
5f47eeea988d
Use own logging package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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365 //log.Debugf("cnts: %d roots: %d\n", len(cnts), len(bf.roots)) |
4768
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366 |
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Morph differences: Directly raster A and subtract B as a raster.
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367 var mp wkb.MultiPolygonGeom |
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Morph differences: Directly raster A and subtract B as a raster.
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368 |
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369 out := func(sh contour, hls []contour) { |
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Morph differences: Directly raster A and subtract B as a raster.
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370 |
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371 polygon := make(wkb.PolygonGeom, 1+len(hls)) |
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Morph differences: Directly raster A and subtract B as a raster.
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372 |
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Morph differences: Directly raster A and subtract B as a raster.
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373 // Handle shell |
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374 shell := make(wkb.LinearRingGeom, len(sh)) |
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Morph differences: Directly raster A and subtract B as a raster.
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375 for j, pt := range sh { |
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376 shell[j] = wkb.PointGeom{ |
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Morph differences: Directly raster A and subtract B as a raster.
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377 X: reprojX(pt.X), |
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Morph differences: Directly raster A and subtract B as a raster.
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378 Y: reprojY(pt.Y), |
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Morph differences: Directly raster A and subtract B as a raster.
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|
379 } |
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Morph differences: Directly raster A and subtract B as a raster.
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|
380 } |
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Morph differences: Directly raster A and subtract B as a raster.
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381 if shell.CCW() { |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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382 shell.Reverse() |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
383 } |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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|
384 polygon[0] = shell |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
385 |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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|
386 // handle holes |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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|
387 for i, hl := range hls { |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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388 hole := make(wkb.LinearRingGeom, len(hl)) |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
389 for j, pt := range hl { |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
390 hole[j] = wkb.PointGeom{ |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
391 X: reprojX(pt.X), |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
392 Y: reprojY(pt.Y), |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
393 } |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
394 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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changeset
|
395 if !hole.CCW() { |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
396 hole.Reverse() |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
diff
changeset
|
397 } |
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Morph differences: Directly raster A and subtract B as a raster.
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parents:
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changeset
|
398 polygon[1+i] = hole |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
399 } |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
400 |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
401 mp = append(mp, polygon) |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
402 } |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
403 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
404 forest.generateRoot(out) |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
405 |
a2f16bbcc846
Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
406 return mp |
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Morph differences: Directly raster A and subtract B as a raster.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
407 } |