Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/raster/PolygonDatasetProducer.java @ 631:f4331a0df032
Chart and histogram output are working without using a cache.
gnv-artifacts/trunk@710 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 25 Feb 2010 08:23:46 +0000 |
parents | 1bf058f1a2d1 |
children | 9a828e5a2390 |
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package de.intevation.gnv.raster; import java.util.List; import java.util.HashMap; import gnu.trove.TDoubleArrayList; import de.intevation.gnv.raster.Vectorizer.Edge; import de.intevation.gnv.jfreechart.PolygonSeries; import de.intevation.gnv.jfreechart.PolygonDataset; import de.intevation.gnv.jfreechart.CompactXYItems; /** * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) */ public class PolygonDatasetProducer extends AbstractProducer { protected HashMap<Integer, PolygonSeries> polygonSeries; protected PolygonDatasetProducer() { } public PolygonDatasetProducer( double minX, double minY, double maxX, double maxY ) { super(minX, minY, maxX, maxY); polygonSeries = new HashMap<Integer, PolygonSeries>(); } public void handleRings( List<Edge> rings, int value, int width, int height ) { if (value == -1) { return; } Integer v = Integer.valueOf(value); PolygonSeries ps = polygonSeries.get(v); if (ps == null) { polygonSeries.put(v, ps = new PolygonSeries()); ps.setAttribute("fill", v); } TDoubleArrayList vertices = new TDoubleArrayList(); /* minX = 0*m1 + b1 <=> b1 = minX * maxX = (width-1)*m1 + b1 * m1 = (maxX - minX)/(width-1) */ double b1 = minX; double m1 = width != 1 ? (maxX - minX)/(width-1) : 0d; double b2 = minY; double m2 = height != 1 ? (maxY - minY)/(height-1) : 0d; for (Edge head: rings) { Edge current = head; do { vertices.add(m1*(current.a % width) + b1); vertices.add(m2*(current.a / width) + b2); } while ((current = current.next) != head); ps.addRing(new CompactXYItems(vertices.toNativeArray())); vertices.reset(); } } public PolygonDataset getPolygonDataset() { return new PolygonDataset(polygonSeries.values()); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: