Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/Vectorizer.java @ 445:f42ed4f10b79

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Fixed some bugs and create "Profilschnitt" polygons via configuration. gnv-artifacts/trunk@493 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 30 Dec 2009 23:02:10 +0000
parents b624879d2902
children 92b7ccbf6163
rev   line source
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1 package de.intevation.gnv.raster;
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2
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3 import java.util.BitSet;
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4 import java.util.List;
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5 import java.util.ArrayList;
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6
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7 import gnu.trove.TIntStack;
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8 import gnu.trove.TIntObjectHashMap;
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9
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10 import org.apache.log4j.Logger;
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11
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12 /**
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13 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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14 */
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15 public class Vectorizer
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16 {
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17 private static Logger log = Logger.getLogger(Vectorizer.class);
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18
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19 public interface RingsHandler {
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20
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21 void handleRings(
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22 List<Edge> rings,
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23 int value,
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24 int width,
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25 int height);
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26
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27 } // interface RingsHandler
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28
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29 public static final class Edge {
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30
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31 public Edge prev;
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32 public Edge next;
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33
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34 public int a;
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35 public int b;
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36
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37 public Edge() {
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38 }
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39
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40 public Edge(int a, int b) {
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41 this.a = a;
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42 this.b = b;
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43 }
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44
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45 public Edge(Edge other) {
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46 a = other.a;
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47 b = other.b;
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48 }
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49
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50 public void chain(Edge other, int found) {
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51
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52 if (found == a) {
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53 other.next = this;
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54 prev = other;
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55 return;
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56 }
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57
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58 if (found == b) {
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59 next = other;
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60 other.prev = this;
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61 return;
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62 }
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63
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64 throw new IllegalStateException("cannot chain");
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65 }
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66
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67 public boolean isComplete() {
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68 Edge current = this;
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69 do {
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70 if (current.prev == null || current.next == null) {
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71 return false;
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72 }
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73 current = current.next;
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74 }
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75 while (current != this);
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76 return true;
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77 }
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78
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79 public int length() {
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80 int length = 0;
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81 Edge current = this;
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82 do { ++length; }
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83 while ((current = current.next) != null && current != this);
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84 return length;
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85 }
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86
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87 public int hashCode() {
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88 return (a << 16) | b;
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89 }
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90
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91 public boolean equals(Object other) {
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92 Edge e = (Edge)other;
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93 return a == e.a && b == e.b;
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94 }
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95 } // class Edge
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96
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97 protected static Edge simplify(Edge edge, int width) {
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98
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99 Edge e1 = edge;
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100 Edge e2 = edge.next;
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101 Edge e3 = e2.next;
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102
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103 int length = edge.length();
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104
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105 if (length < 2) {
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106 return e1;
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107 }
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108
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109 int count = 0;
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110
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111 do {
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112 int e1x = e1.a % width;
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113 int e1y = e1.a / width;
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114 int e2x = e2.a % width;
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115 int e2y = e2.a / width;
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116 int e3x = e3.a % width;
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117 int e3y = e3.a / width;
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118
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119 if ((e1x == e2x && e2x == e3x && e1x == e3x)
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120 || (e1y == e2y && e2y == e3y && e1y == e3y)) {
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121 e1.next = e3;
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122 e3.prev = e1;
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123 e2 = e3;
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124 e3 = e2.next;
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125 count = 0;
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126 --length;
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127 }
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128 else {
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129 e1 = e1.next;
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parents:
diff changeset
130 e2 = e2.next;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
131 e3 = e3.next;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
132 ++count;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
133 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
134 }
437
b624879d2902 Added vectorizer rings callback to generate iso lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 436
diff changeset
135 while (length > 1 && count < length + 2);
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
136
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
137 return e1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
138 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
139
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
140 protected int [] raster;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
141 protected int width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
142 protected TIntObjectHashMap openEdges;
436
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
143 protected List<Edge> rings;
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
144 protected boolean simplify;
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
145
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
146 public Vectorizer() {
436
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
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parents: 424
diff changeset
147 this(true);
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
148 }
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
149
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
150 public Vectorizer(boolean simplify) {
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
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parents: 424
diff changeset
151 openEdges = new TIntObjectHashMap();
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
152 rings = new ArrayList<Edge>();
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
153 this.simplify = simplify;
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
154 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
155
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
156 public Vectorizer(int [] raster, int width) {
445
f42ed4f10b79 Fixed some bugs and create "Profilschnitt" polygons via configuration.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 437
diff changeset
157 this(true, raster, width);
f42ed4f10b79 Fixed some bugs and create "Profilschnitt" polygons via configuration.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 437
diff changeset
158 }
f42ed4f10b79 Fixed some bugs and create "Profilschnitt" polygons via configuration.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 437
diff changeset
159
f42ed4f10b79 Fixed some bugs and create "Profilschnitt" polygons via configuration.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 437
diff changeset
160 public Vectorizer(boolean simplify, int [] raster, int width) {
f42ed4f10b79 Fixed some bugs and create "Profilschnitt" polygons via configuration.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 437
diff changeset
161 this(simplify);
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
162 this.raster = raster;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
163 this.width = width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
164 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
165
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166 public static final int tl(int i, int w) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
167 int x = i % w;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
168 int y = i / w;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
169 return x + (w + 1)*y;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
170 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
171
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
172 public static final int tr(int i, int w) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
173 return tl(i, w) + 1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
174 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
175
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176 public static final int bl(int i, int w) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
177 return tl(i, w) + w + 1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
178 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
179
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
180 public static final int br(int i, int w) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
181 return bl(i, w) + 1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
182 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
183
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
184 protected void resetRegion() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
185 openEdges.clear();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
186 rings.clear();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
187 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
188
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
189 protected void emit(Edge edge) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
190
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
191 Edge otherA = (Edge)openEdges.remove(edge.a);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
192 if (otherA != null) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
193 otherA.chain(edge, edge.a);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
194 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
195
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
196 Edge otherB = (Edge)openEdges.remove(edge.b);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
197 if (otherB != null) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
198 otherB.chain(edge, edge.b);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
199 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
200
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
201 if (edge.isComplete()) {
436
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
202 rings.add(simplify ? simplify(edge, width + 1) : edge);
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
203 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
204 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
205 if (otherA == null) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
206 openEdges.put(edge.a, edge);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
207 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
208 if (otherB == null) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
209 openEdges.put(edge.b, edge);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
210 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
211 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
212 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
213
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
214 public int process(RingsHandler handler) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
215
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
216 BitSet visited = new BitSet(raster.length);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
217
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
218 TIntStack stack = new TIntStack();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
219
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
220 int regions = 0;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
221
436
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
222 int height = raster.length / width;
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
223
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
224 for (int i = 0; i < raster.length; ++i) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
225 if (visited.get(i)) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
226 continue;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
227 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
228
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
229 ++regions;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
230
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
231 int currentValue = raster[i];
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
232 visited.set(i);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
233
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
234 int current = i;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
235 visited.set(current);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
236
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
237 for (;;) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
238 int tl = tl(current, width);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
239 int tr = tr(current, width);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
240 int bl = bl(current, width);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
241 int br = br(current, width);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
242
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
243 int t = current - width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
244
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
245 if (t < 0) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
246 emit(new Edge(tr, tl));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
247 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
248 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
249 if (raster[t] != currentValue) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
250 emit(new Edge(tr, tl));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
251 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
252 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
253 if (!visited.get(t)) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
254 visited.set(t);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
255 stack.push(t);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
256 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
257 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
258 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
259
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
260 int b = current + width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
261
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
262 if (b >= raster.length) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
263 emit(new Edge(bl, br));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
264 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
265 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
266 if (raster[b] != currentValue) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
267 emit(new Edge(bl, br));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
268 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
269 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
270 if (!visited.get(b)) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
271 visited.set(b);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
272 stack.push(b);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
273 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
274 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
275 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
276
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
277 int x = current % width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
278
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
279 if (x == 0) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
280 emit(new Edge(tl, bl));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
281 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
282 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
283 int l = current - 1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
284 if (raster[l] != currentValue) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
285 emit(new Edge(tl, bl));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
286 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
287 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
288 if (!visited.get(l)) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
289 visited.set(l);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
290 stack.push(l);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
291 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
292 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
293 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
294
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
295 if (x == width - 1) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
296 emit(new Edge(br, tr));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
297 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
298 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
299 int r = current + 1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
300 if (raster[r] != currentValue) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
301 emit(new Edge(br, tr));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
302 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
303 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
304 if (!visited.get(r)) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
305 visited.set(r);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
306 stack.push(r);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
307 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
308 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
309 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
310
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
311 if (stack.size() == 0) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
312 break;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
313 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
314
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
315 current = stack.pop();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
316 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
317
436
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
318 handler.handleRings(
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
319 rings,
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
320 currentValue,
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
321 width + 1,
6642ab6c583c Added vectorizer rings callback which generates polygon datasets suitable
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
322 height + 1);
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
323
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
324 resetRegion();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
325 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
326
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
327 return regions;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
328 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
329 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
330 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org