Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoPolygonSeriesProducer.java @ 817:3f447e92024a
Added JavaDoc package descriptions.
gnv-artifacts/trunk@902 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Mon, 12 Apr 2010 09:37:30 +0000 |
parents | 4abe172be970 |
children | f953c9a559d8 |
rev | line source |
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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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15 |
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16 import org.apache.log4j.Logger; |
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17 |
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18 /** |
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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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30 |
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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 |
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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 |
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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 |
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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 |
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More javadoc.
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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 } |
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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 : |