Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/JTSMultiLineStringProducer.java @ 482:64e65daa65e9

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Fixed some bugs with calculating "Horizontalschnitte". gnv-artifacts/trunk@557 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 17 Jan 2010 21:26:21 +0000
parents f7038820df2e
children 4080b57dcb52
rev   line source
465
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.gnv.raster;
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2
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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3 import java.util.List;
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4 import java.util.ArrayList;
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5
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6 import org.apache.log4j.Logger;
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7
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8 import com.vividsolutions.jts.geom.GeometryFactory;
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9 import com.vividsolutions.jts.geom.MultiLineString;
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10 import com.vividsolutions.jts.geom.LineString;
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11 import com.vividsolutions.jts.geom.Coordinate;
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12
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13 import gnu.trove.TIntObjectHashMap;
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14
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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15 import de.intevation.gnv.raster.Vectorizer.Edge;
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16
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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17 import de.intevation.gnv.utils.Pair;
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18
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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19 import de.intevation.gnv.math.IJKey;
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20
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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21 /**
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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22 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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23 */
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24 public class JTSMultiLineStringProducer
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25 extends IsoProducer
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26 {
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27 private static Logger log = Logger.getLogger(
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28 JTSMultiLineStringProducer.class);
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29
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30 protected GeometryFactory geometryFactory;
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31
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32 public JTSMultiLineStringProducer(
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33 double minX, double minY,
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34 double maxX, double maxY
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35 ) {
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36 this(
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37 JTSMultiPolygonProducer.createDefaultGeometryFactory(),
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38 minX, minY,
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39 maxX, maxY);
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40 }
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41
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42 public JTSMultiLineStringProducer(
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43 GeometryFactory geometryFactory,
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44 double minX, double minY,
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45 double maxX, double maxY
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46 ) {
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47 super(minX, minY, maxX, maxY);
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48 this.geometryFactory = geometryFactory;
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49 }
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50
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51 public List<Pair<Object, MultiLineString>> getMultiLineStrings(
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52 AttributeGenerator attributeGenerator
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53 ) {
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54 ArrayList<Pair<Object, MultiLineString>> multiLineStrings =
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55 new ArrayList<Pair<Object, MultiLineString>>();
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56
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57 double b1 = minX;
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58 double m1 = width != 1
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59 ? (maxX - minX)/(width-1)
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60 : 0d;
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61
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62 double b2 = minY;
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63 double m2 = height != 1
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64 ? (maxY - minY)/(height-1)
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65 : 0d;
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66
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67 ArrayList<Coordinate> coordinates = new ArrayList<Coordinate>();
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68
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69 for (IJKey key: joinPairs()) {
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70 ArrayList<LineString> lineStrings = new ArrayList<LineString>();
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71
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72 // process complete
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73 ArrayList<Edge> completeList = complete.get(key);
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74 if (completeList != null) {
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75 for (Edge head: completeList) {
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76 Edge current = head;
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77 do {
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78 coordinates.add(new Coordinate(
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79 m1*(current.a % width) + b1,
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80 m2*(current.a / width) + b2));
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81 }
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82 while ((current = current.next) != head);
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83 // add head again to close shape
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84 coordinates.add(new Coordinate(
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85 m1*(head.a % width) + b1,
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86 m2*(head.a / width) + b2));
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87 lineStrings.add(
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88 geometryFactory.createLineString(
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89 coordinates.toArray(
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90 new Coordinate[coordinates.size()])));
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91 coordinates.clear();
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92 }
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93 }
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94
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95 // process open
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96 TIntObjectHashMap map = commonOpen.get(key);
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97
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98 if (map != null) {
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99 for (Edge head: headList(map)) {
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100
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101 head = Vectorizer.simplify(head, width);
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102 Edge current = head, last = head;
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103 do {
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104 coordinates.add(new Coordinate(
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105 m1*(current.a % width) + b1,
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106 m2*(current.a / width) + b2));
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107 last = current;
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108 }
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109 while ((current = current.next) != null);
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110 // add b from tail
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111 coordinates.add(new Coordinate(
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112 m1*(last.b % width) + b1,
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113 m2*(last.b / width) + b2));
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114 lineStrings.add(
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115 geometryFactory.createLineString(
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116 coordinates.toArray(
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117 new Coordinate[coordinates.size()])));
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118 coordinates.clear();
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119 } // for all in common open
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120 } // if map defined for key
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121
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122 if (!lineStrings.isEmpty()) {
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123 MultiLineString multiLineString =
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124 geometryFactory.createMultiLineString(
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125 lineStrings.toArray(
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126 new LineString[lineStrings.size()]));
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127 lineStrings.clear();
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128 Object attribute = attributeGenerator != null
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129 ? attributeGenerator.generateAttribute(key.i, key.j)
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130 : key;
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131 multiLineStrings.add(new Pair<Object, MultiLineString>(
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132 attribute,
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133 multiLineString));
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134 }
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135 } // for all pairs
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136
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137 return multiLineStrings;
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138 }
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139 }
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140 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org