Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/raster/JTSMultiLineStringProducer.java @ 483:c8089cd7d777
Added explicit index scheme to palette classes to allow external references.
gnv-artifacts/trunk@558 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 18 Jan 2010 10:56:41 +0000 |
parents | f7038820df2e |
children | 4080b57dcb52 |
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package de.intevation.gnv.raster; import java.util.List; import java.util.ArrayList; import org.apache.log4j.Logger; import com.vividsolutions.jts.geom.GeometryFactory; import com.vividsolutions.jts.geom.MultiLineString; import com.vividsolutions.jts.geom.LineString; import com.vividsolutions.jts.geom.Coordinate; import gnu.trove.TIntObjectHashMap; import de.intevation.gnv.raster.Vectorizer.Edge; import de.intevation.gnv.utils.Pair; import de.intevation.gnv.math.IJKey; /** * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) */ public class JTSMultiLineStringProducer extends IsoProducer { private static Logger log = Logger.getLogger( JTSMultiLineStringProducer.class); protected GeometryFactory geometryFactory; public JTSMultiLineStringProducer( double minX, double minY, double maxX, double maxY ) { this( JTSMultiPolygonProducer.createDefaultGeometryFactory(), minX, minY, maxX, maxY); } public JTSMultiLineStringProducer( GeometryFactory geometryFactory, double minX, double minY, double maxX, double maxY ) { super(minX, minY, maxX, maxY); this.geometryFactory = geometryFactory; } public List<Pair<Object, MultiLineString>> getMultiLineStrings( AttributeGenerator attributeGenerator ) { ArrayList<Pair<Object, MultiLineString>> multiLineStrings = new ArrayList<Pair<Object, MultiLineString>>(); double b1 = minX; double m1 = width != 1 ? (maxX - minX)/(width-1) : 0d; double b2 = minY; double m2 = height != 1 ? (maxY - minY)/(height-1) : 0d; ArrayList<Coordinate> coordinates = new ArrayList<Coordinate>(); for (IJKey key: joinPairs()) { ArrayList<LineString> lineStrings = new ArrayList<LineString>(); // process complete ArrayList<Edge> completeList = complete.get(key); if (completeList != null) { for (Edge head: completeList) { Edge current = head; do { coordinates.add(new Coordinate( m1*(current.a % width) + b1, m2*(current.a / width) + b2)); } while ((current = current.next) != head); // add head again to close shape coordinates.add(new Coordinate( m1*(head.a % width) + b1, m2*(head.a / width) + b2)); lineStrings.add( geometryFactory.createLineString( coordinates.toArray( new Coordinate[coordinates.size()]))); coordinates.clear(); } } // process open TIntObjectHashMap map = commonOpen.get(key); if (map != null) { for (Edge head: headList(map)) { head = Vectorizer.simplify(head, width); Edge current = head, last = head; do { coordinates.add(new Coordinate( m1*(current.a % width) + b1, m2*(current.a / width) + b2)); last = current; } while ((current = current.next) != null); // add b from tail coordinates.add(new Coordinate( m1*(last.b % width) + b1, m2*(last.b / width) + b2)); lineStrings.add( geometryFactory.createLineString( coordinates.toArray( new Coordinate[coordinates.size()]))); coordinates.clear(); } // for all in common open } // if map defined for key if (!lineStrings.isEmpty()) { MultiLineString multiLineString = geometryFactory.createMultiLineString( lineStrings.toArray( new LineString[lineStrings.size()])); lineStrings.clear(); Object attribute = attributeGenerator != null ? attributeGenerator.generateAttribute(key.i, key.j) : key; multiLineStrings.add(new Pair<Object, MultiLineString>( attribute, multiLineString)); } } // for all pairs return multiLineStrings; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :