Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/raster/PolygonDatasetProducer.java @ 540:80630520e25a
merged gnv-artifacts/0.4
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:49 +0200 |
| parents | 1bf058f1a2d1 |
| children | 9a828e5a2390 |
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| 415:9f4a0b990d27 | 540:80630520e25a |
|---|---|
| 1 package de.intevation.gnv.raster; | |
| 2 | |
| 3 import java.util.List; | |
| 4 import java.util.HashMap; | |
| 5 | |
| 6 import gnu.trove.TDoubleArrayList; | |
| 7 | |
| 8 import de.intevation.gnv.raster.Vectorizer.Edge; | |
| 9 | |
| 10 import de.intevation.gnv.jfreechart.PolygonSeries; | |
| 11 import de.intevation.gnv.jfreechart.PolygonDataset; | |
| 12 import de.intevation.gnv.jfreechart.CompactXYItems; | |
| 13 | |
| 14 /** | |
| 15 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) | |
| 16 */ | |
| 17 public class PolygonDatasetProducer | |
| 18 extends AbstractProducer | |
| 19 { | |
| 20 protected HashMap<Integer, PolygonSeries> polygonSeries; | |
| 21 | |
| 22 protected PolygonDatasetProducer() { | |
| 23 } | |
| 24 | |
| 25 public PolygonDatasetProducer( | |
| 26 double minX, double minY, | |
| 27 double maxX, double maxY | |
| 28 | |
| 29 ) { | |
| 30 super(minX, minY, maxX, maxY); | |
| 31 polygonSeries = new HashMap<Integer, PolygonSeries>(); | |
| 32 } | |
| 33 | |
| 34 public void handleRings( | |
| 35 List<Edge> rings, | |
| 36 int value, | |
| 37 int width, | |
| 38 int height | |
| 39 ) { | |
| 40 if (value == -1) { | |
| 41 return; | |
| 42 } | |
| 43 | |
| 44 Integer v = Integer.valueOf(value); | |
| 45 | |
| 46 PolygonSeries ps = polygonSeries.get(v); | |
| 47 | |
| 48 if (ps == null) { | |
| 49 polygonSeries.put(v, ps = new PolygonSeries()); | |
| 50 ps.setAttribute("fill", v); | |
| 51 } | |
| 52 | |
| 53 TDoubleArrayList vertices = new TDoubleArrayList(); | |
| 54 | |
| 55 /* minX = 0*m1 + b1 <=> b1 = minX | |
| 56 * maxX = (width-1)*m1 + b1 | |
| 57 * m1 = (maxX - minX)/(width-1) | |
| 58 */ | |
| 59 | |
| 60 double b1 = minX; | |
| 61 double m1 = width != 1 | |
| 62 ? (maxX - minX)/(width-1) | |
| 63 : 0d; | |
| 64 | |
| 65 double b2 = minY; | |
| 66 double m2 = height != 1 | |
| 67 ? (maxY - minY)/(height-1) | |
| 68 : 0d; | |
| 69 | |
| 70 for (Edge head: rings) { | |
| 71 Edge current = head; | |
| 72 do { | |
| 73 vertices.add(m1*(current.a % width) + b1); | |
| 74 vertices.add(m2*(current.a / width) + b2); | |
| 75 } | |
| 76 while ((current = current.next) != head); | |
| 77 ps.addRing(new CompactXYItems(vertices.toNativeArray())); | |
| 78 vertices.reset(); | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 public PolygonDataset getPolygonDataset() { | |
| 83 return new PolygonDataset(polygonSeries.values()); | |
| 84 } | |
| 85 } | |
| 86 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |