Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoPolygonSeriesProducer.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents 4abe172be970
children
rev   line source
1115
f953c9a559d8 Added license file and license headers.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
f953c9a559d8 Added license file and license headers.
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.raster;
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10
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11 import de.intevation.gnv.jfreechart.CompactXYItems;
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12 import de.intevation.gnv.jfreechart.PolygonSeries;
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13
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14 import de.intevation.gnv.math.IJKey;
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15
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16 import de.intevation.gnv.raster.Vectorizer.Edge;
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17
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18 import gnu.trove.TDoubleArrayList;
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19 import gnu.trove.TIntObjectHashMap;
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20
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21 import java.util.ArrayList;
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22 import java.util.Collection;
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23
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24 import org.apache.log4j.Logger;
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25
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26 /**
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27 * Vectorizer backend to generate iso lines which are able to be visualized
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28 * via {@link de.intevation.gnv.jfreechart.PolygonPlot} as line strings
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29 * and custom labels on the chart.
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30 *
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31 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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32 */
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33 public class IsoPolygonSeriesProducer
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34 extends IsoProducer
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35 {
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36 private static Logger log = Logger.getLogger(
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37 IsoPolygonSeriesProducer.class);
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38
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39 /**
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40 * The line width of the line string used in the chart.
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41 */
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42 public static final Float LINE_WIDTH = Float.valueOf(0.1f);
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43
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44 /**
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45 * Constructor to create an IsoPolygonSeriesProducer with a
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46 * given world bounding box.
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47 * @param minX Min x coord of the world.
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48 * @param minY Min y coord of the world.
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49 * @param maxX Max x coord of the world.
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50 * @param maxY Max y coord of the world.
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51 */
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52 public IsoPolygonSeriesProducer(
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53 double minX, double minY,
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54 double maxX, double maxY
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55 ) {
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56 super(minX, minY, maxX, maxY);
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57 }
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58
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59 /**
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60 * Returns a collection of series with line strings
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61 * with no AttributeGenerator.
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62 * @return The collection with line strings.
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63 */
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64 public Collection<PolygonSeries> getSeries() {
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65 return getSeries(null);
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66 }
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67
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68 /**
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69 * Returns a collection of series with line strings.
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70 * The label attributes are generated with a given generator.
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71 * @param attributeGenerator The attribute generator. Maybe null
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72 * if no attributes should be generated.
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73 * @return The collection with the line strings.
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74 */
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75 public Collection<PolygonSeries> getSeries(
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76 AttributeGenerator attributeGenerator
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77 ) {
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78 ArrayList<PolygonSeries> series = new ArrayList<PolygonSeries>();
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79
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80 double b1 = minX;
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81 double m1 = width != 1
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82 ? (maxX - minX)/(width-1)
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83 : 0d;
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84
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85 double b2 = minY;
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86 double m2 = height != 1
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87 ? (maxY - minY)/(height-1)
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88 : 0d;
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89
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90 TDoubleArrayList vertices = new TDoubleArrayList();
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91
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92 for (IJKey key: joinPairs()) {
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93 PolygonSeries ps = new PolygonSeries();
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94
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95 // process complete
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96 ArrayList<Edge> completeList = complete.get(key);
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97 if (completeList != null) {
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98 for (Edge head: completeList) {
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99 Edge current = head;
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100 do {
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101 vertices.add(m1*(current.a % width) + b1);
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102 vertices.add(m2*(current.a / width) + b2);
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103 }
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104 while ((current = current.next) != head);
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105 // add head again to close shape
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106 vertices.add(m1*(head.a % width) + b1);
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107 vertices.add(m2*(head.a / width) + b2);
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108 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
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109 vertices.reset();
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110 }
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111 }
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112
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113 // process open
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114 TIntObjectHashMap map = commonOpen.get(key);
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115
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116 if (map != null) {
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117 for (Edge head: headList(map)) {
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118
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119 head = Vectorizer.simplify(head, width);
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120 Edge current = head, last = head;
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121 do {
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122 vertices.add(m1*(current.a % width) + b1);
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123 vertices.add(m2*(current.a / width) + b2);
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124 last = current;
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125 }
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126 while ((current = current.next) != null);
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127 // add b from tail
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128 vertices.add(m1*(last.b % width) + b1);
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129 vertices.add(m2*(last.b / width) + b2);
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130 ps.addRing(new CompactXYItems(vertices.toNativeArray()));
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131 vertices.reset();
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132 } // for all in common open
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133 } // if map defined for key
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134
801
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135 if (ps.getItemCount() > 0) {
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136 series.add(ps);
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137 if (attributeGenerator != null) {
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138 Object attribute = attributeGenerator
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139 .generateAttribute(key.i, key.j);
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140
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141 if (attribute != null) {
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142 ps.setAttribute("label", attribute);
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143 }
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144 }
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145 ps.setAttribute("line.width", LINE_WIDTH);
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146 }
437
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147 } // for all pairs
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148
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149 return series;
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150 }
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151 }
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152 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org