Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoPolygonSeriesProducer.java @ 802:4abe172be970

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Finished Javadoc of the raster package. gnv-artifacts/trunk@884 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 07 Apr 2010 07:49:12 +0000
parents d766fe2d917a
children f953c9a559d8
rev   line source
437
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1 package de.intevation.gnv.raster;
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2
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3 import de.intevation.gnv.jfreechart.CompactXYItems;
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4 import de.intevation.gnv.jfreechart.PolygonSeries;
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5
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6 import de.intevation.gnv.math.IJKey;
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7
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8 import de.intevation.gnv.raster.Vectorizer.Edge;
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9
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10 import gnu.trove.TDoubleArrayList;
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11 import gnu.trove.TIntObjectHashMap;
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12
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13 import java.util.ArrayList;
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14 import java.util.Collection;
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16 import org.apache.log4j.Logger;
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17
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18 /**
802
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19 * Vectorizer backend to generate iso lines which are able to be visualized
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20 * via {@link de.intevation.gnv.jfreechart.PolygonPlot} as line strings
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21 * and custom labels on the chart.
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22 *
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23 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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24 */
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25 public class IsoPolygonSeriesProducer
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26 extends IsoProducer
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27 {
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28 private static Logger log = Logger.getLogger(
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29 IsoPolygonSeriesProducer.class);
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802
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31 /**
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32 * The line width of the line string used in the chart.
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33 */
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34 public static final Float LINE_WIDTH = Float.valueOf(0.1f);
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35
802
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36 /**
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37 * Constructor to create an IsoPolygonSeriesProducer with a
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38 * given world bounding box.
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39 * @param minX Min x coord of the world.
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40 * @param minY Min y coord of the world.
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41 * @param maxX Max x coord of the world.
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42 * @param maxY Max y coord of the world.
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43 */
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44 public IsoPolygonSeriesProducer(
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45 double minX, double minY,
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46 double maxX, double maxY
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47 ) {
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48 super(minX, minY, maxX, maxY);
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49 }
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50
802
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51 /**
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52 * Returns a collection of series with line strings
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53 * with no AttributeGenerator.
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54 * @return The collection with line strings.
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55 */
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56 public Collection<PolygonSeries> getSeries() {
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57 return getSeries(null);
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58 }
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59
802
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60 /**
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61 * Returns a collection of series with line strings.
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62 * The label attributes are generated with a given generator.
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63 * @param attributeGenerator The attribute generator. Maybe null
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64 * if no attributes should be generated.
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65 * @return The collection with the line strings.
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66 */
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67 public Collection<PolygonSeries> getSeries(
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68 AttributeGenerator attributeGenerator
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69 ) {
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70 ArrayList<PolygonSeries> series = new ArrayList<PolygonSeries>();
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71
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72 double b1 = minX;
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73 double m1 = width != 1
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74 ? (maxX - minX)/(width-1)
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75 : 0d;
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76
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77 double b2 = minY;
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78 double m2 = height != 1
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79 ? (maxY - minY)/(height-1)
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80 : 0d;
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81
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82 TDoubleArrayList vertices = new TDoubleArrayList();
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83
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84 for (IJKey key: joinPairs()) {
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85 PolygonSeries ps = new PolygonSeries();
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86
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87 // process complete
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88 ArrayList<Edge> completeList = complete.get(key);
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89 if (completeList != null) {
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90 for (Edge head: completeList) {
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91 Edge current = head;
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92 do {
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93 vertices.add(m1*(current.a % width) + b1);
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94 vertices.add(m2*(current.a / width) + b2);
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95 }
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96 while ((current = current.next) != head);
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97 // add head again to close shape
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98 vertices.add(m1*(head.a % width) + b1);
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99 vertices.add(m2*(head.a / width) + b2);
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100 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
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101 vertices.reset();
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102 }
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103 }
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104
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105 // process open
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106 TIntObjectHashMap map = commonOpen.get(key);
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107
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108 if (map != null) {
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109 for (Edge head: headList(map)) {
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110
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111 head = Vectorizer.simplify(head, width);
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112 Edge current = head, last = head;
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113 do {
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114 vertices.add(m1*(current.a % width) + b1);
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115 vertices.add(m2*(current.a / width) + b2);
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116 last = current;
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117 }
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118 while ((current = current.next) != null);
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119 // add b from tail
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120 vertices.add(m1*(last.b % width) + b1);
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121 vertices.add(m2*(last.b / width) + b2);
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122 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
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123 vertices.reset();
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124 } // for all in common open
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125 } // if map defined for key
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126
801
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127 if (ps.getItemCount() > 0) {
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128 series.add(ps);
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129 if (attributeGenerator != null) {
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130 Object attribute = attributeGenerator
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131 .generateAttribute(key.i, key.j);
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132
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133 if (attribute != null) {
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134 ps.setAttribute("label", attribute);
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135 }
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136 }
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137 ps.setAttribute("line.width", LINE_WIDTH);
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138 }
437
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139 } // for all pairs
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140
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141 return series;
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142 }
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143 }
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144 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org