Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoPolygonSeriesProducer.java @ 447:92b7ccbf6163
Improved generation of iso lines in vertical cross section.
gnv-artifacts/trunk@495 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 01 Jan 2010 21:52:41 +0000 |
parents | eb2ac62e853a |
children | 3cb2bea50456 |
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.List; |
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4 import java.util.HashSet; |
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5 import java.util.HashMap; |
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6 import java.util.ArrayList; |
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7 import java.util.Collection; |
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8 |
447
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9 import org.apache.log4j.Logger; |
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10 |
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11 import gnu.trove.TIntHashSet; |
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12 import gnu.trove.TIntObjectHashMap; |
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13 import gnu.trove.TDoubleArrayList; |
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14 import gnu.trove.TObjectProcedure; |
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15 |
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16 import de.intevation.gnv.raster.Vectorizer.RingsHandler; |
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17 import de.intevation.gnv.raster.Vectorizer.Edge; |
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18 |
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19 import de.intevation.gnv.math.IJKey; |
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20 |
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21 import de.intevation.gnv.jfreechart.PolygonSeries; |
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22 import de.intevation.gnv.jfreechart.CompactXYItems; |
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23 |
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24 /** |
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25 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) |
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26 */ |
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27 public class IsoPolygonSeriesProducer |
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28 implements RingsHandler |
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29 { |
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30 private static Logger log = Logger.getLogger( |
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31 IsoPolygonSeriesProducer.class); |
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32 |
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33 public static final Float LINE_WIDTH = Float.valueOf(0.1f); |
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34 |
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35 public interface LabelGenerator { |
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36 |
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37 String generateLabel(int neighbor1, int neighbor2); |
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38 |
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39 } // interface LabelGenerator |
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40 |
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41 protected HashMap<Edge, Integer> open; |
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42 protected HashMap<IJKey, TIntObjectHashMap> commonOpen; |
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43 protected HashMap<IJKey, ArrayList<Edge>> complete; |
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44 |
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45 protected int width; |
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46 protected int height; |
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47 |
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48 protected double minX; |
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49 protected double minY; |
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50 protected double maxX; |
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51 protected double maxY; |
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52 |
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53 public IsoPolygonSeriesProducer( |
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54 double minX, double minY, |
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55 double maxX, double maxY |
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56 ) { |
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57 this.minX = minX; |
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58 this.minY = minY; |
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59 this.maxX = maxX; |
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60 this.maxY = maxY; |
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61 |
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62 open = new HashMap<Edge, Integer>(); |
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63 commonOpen = new HashMap<IJKey, TIntObjectHashMap>(); |
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64 complete = new HashMap<IJKey, ArrayList<Edge>>(); |
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65 } |
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66 |
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67 public void handleRings( |
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68 List<Edge> rings, |
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69 int value, |
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70 int width, |
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71 int height |
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72 ) { |
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73 if (value == -1) { |
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74 return; |
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75 } |
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76 this.width = width; |
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77 this.height = height; |
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78 |
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79 Integer v = Integer.valueOf(value); |
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80 |
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81 for (Edge head: rings) { |
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82 Edge current = head; |
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83 do { |
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84 Integer neighbor = open.remove(current); |
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85 |
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86 if (neighbor != null) { |
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87 IJKey pair = new IJKey(value, neighbor.intValue()); |
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88 pair.sort(); |
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89 |
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90 TIntObjectHashMap co = commonOpen.get(pair); |
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91 |
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92 if (co == null) { |
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93 commonOpen.put(pair, co = new TIntObjectHashMap()); |
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94 } |
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95 |
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96 Edge edge = new Edge(current); |
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97 |
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98 Edge otherA = (Edge)co.remove(edge.a); |
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99 if (otherA != null) { |
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100 otherA.chain(edge, edge.a); |
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101 } |
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102 |
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103 Edge otherB = (Edge)co.remove(edge.b); |
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104 if (otherB != null) { |
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105 otherB.chain(edge, edge.b); |
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106 } |
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107 |
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108 if (edge.isComplete()) { |
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109 ArrayList list = complete.get(pair); |
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110 if (list == null) { |
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111 complete.put(pair, list = new ArrayList()); |
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112 } |
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113 list.add(Vectorizer.simplify(edge, width)); |
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114 } |
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115 else { |
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116 if (otherA == null) { |
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117 co.put(edge.a, edge); |
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118 } |
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119 if (otherB == null) { |
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120 co.put(edge.b, edge); |
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121 } |
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122 } |
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123 } |
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124 else { |
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125 Edge edge = new Edge(current.b, current.a); |
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126 open.put(edge, v); |
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127 } |
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128 |
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129 current = current.next; |
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130 } |
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131 while (current != head); |
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132 } // for all rings |
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133 |
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134 } // handleRings |
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135 |
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136 public Collection<PolygonSeries> getSeries() { |
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137 return getSeries(null); |
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138 } |
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139 |
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140 public Collection<PolygonSeries> getSeries(LabelGenerator labelGenerator) { |
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141 |
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142 ArrayList<PolygonSeries> series = new ArrayList<PolygonSeries>(); |
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143 |
437
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144 double b1 = minX; |
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145 double m1 = width != 1 |
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146 ? (maxX - minX)/(width-1) |
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147 : 0d; |
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148 |
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149 double b2 = minY; |
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150 double m2 = height != 1 |
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151 ? (maxY - minY)/(height-1) |
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152 : 0d; |
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153 |
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154 // join keys of complete and open polygons |
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155 HashSet<IJKey> pairs = new HashSet<IJKey>(); |
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156 for (IJKey key: complete.keySet()) { |
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157 pairs.add(key); |
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158 } |
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159 for (IJKey key: commonOpen.keySet()) { |
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160 pairs.add(key); |
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161 } |
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162 |
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163 TDoubleArrayList vertices = new TDoubleArrayList(); |
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164 |
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165 for (IJKey key: pairs) { |
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166 PolygonSeries ps = new PolygonSeries(); |
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167 |
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168 // process complete |
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169 ArrayList<Edge> completeList = complete.get(key); |
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170 if (completeList != null) { |
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171 for (Edge head: completeList) { |
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172 Edge current = head; |
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173 do { |
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174 vertices.add(m1*(current.a % width) + b1); |
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175 vertices.add(m2*(current.a / width) + b2); |
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176 } |
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177 while ((current = current.next) != head); |
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178 // add head again to close shape |
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179 vertices.add(m1*(head.a % width) + b1); |
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180 vertices.add(m2*(head.a / width) + b2); |
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181 ps.addRing(new CompactXYItems(vertices.toNativeArray())); |
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182 vertices.clear(); |
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183 } |
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184 } |
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185 |
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186 // process open |
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187 TIntObjectHashMap map = commonOpen.get(key); |
447
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188 |
437
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189 if (map != null) { |
447
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190 final ArrayList<Edge> headList = new ArrayList<Edge>(); |
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191 map.forEachValue(new TObjectProcedure() { |
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192 TIntHashSet headSet = new TIntHashSet(); |
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193 public boolean execute(Object value) { |
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194 Edge head = ((Edge)value).head(); |
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195 if (headSet.add(head.a)) { |
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196 headList.add(head); |
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197 } |
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198 return true; |
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199 } |
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200 }); |
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201 |
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202 for (Edge head: headList) { |
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203 |
437
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204 head = Vectorizer.simplify(head, width); |
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205 Edge current = head, last = head; |
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206 do { |
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207 vertices.add(m1*(current.a % width) + b1); |
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208 vertices.add(m2*(current.a / width) + b2); |
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209 last = current; |
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210 } |
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|
211 while ((current = current.next) != null); |
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212 // add b from tail |
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213 vertices.add(m1*(last.b % width) + b1); |
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214 vertices.add(m2*(last.b / width) + b2); |
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215 ps.addRing(new CompactXYItems(vertices.toNativeArray())); |
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216 vertices.clear(); |
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217 } // for all in common open |
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218 } // if map defined for key |
447
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219 |
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220 int itemCount = ps.getItemCount(); |
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221 |
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222 if (itemCount > 0) { |
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223 series.add(ps); |
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|
224 if (labelGenerator != null) { |
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225 ps.setAttribute( |
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|
226 "label", |
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|
227 labelGenerator.generateLabel(key.i, key.j)); |
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228 } |
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229 ps.setAttribute("line.width", LINE_WIDTH); |
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230 } |
437
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231 } // for all pairs |
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232 |
b624879d2902
Added vectorizer rings callback to generate iso lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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233 return series; |
b624879d2902
Added vectorizer rings callback to generate iso lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
234 } |
b624879d2902
Added vectorizer rings callback to generate iso lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
235 } |
b624879d2902
Added vectorizer rings callback to generate iso lines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
236 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |