sascha@437: package de.intevation.gnv.raster;
sascha@437: 
sascha@779: import de.intevation.gnv.jfreechart.CompactXYItems;
sascha@779: import de.intevation.gnv.jfreechart.PolygonSeries;
sascha@779: 
sascha@779: import de.intevation.gnv.math.IJKey;
sascha@779: 
sascha@779: import de.intevation.gnv.raster.Vectorizer.Edge;
sascha@779: 
sascha@779: import gnu.trove.TDoubleArrayList;
sascha@779: import gnu.trove.TIntObjectHashMap;
sascha@779: 
sascha@437: import java.util.ArrayList;
sascha@437: import java.util.Collection;
sascha@437: 
sascha@447: import org.apache.log4j.Logger;
sascha@447: 
sascha@437: /**
sascha@802:  * Vectorizer backend to generate iso lines which are able to be visualized
sascha@802:  * via {@link de.intevation.gnv.jfreechart.PolygonPlot} as line strings
sascha@802:  * and custom labels on the chart.
sascha@802:  *
sascha@780:  * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
sascha@437:  */
sascha@437: public class IsoPolygonSeriesProducer
sascha@465: extends      IsoProducer
sascha@437: {
sascha@448:     private static Logger log = Logger.getLogger(
sascha@448:         IsoPolygonSeriesProducer.class);
sascha@447: 
sascha@802:     /**
sascha@802:      * The line width of the line string used in the chart.
sascha@802:      */
sascha@802:     public static final Float LINE_WIDTH = Float.valueOf(0.1f);
sascha@447: 
sascha@802:     /**
sascha@802:      * Constructor to create an IsoPolygonSeriesProducer with a
sascha@802:      * given world bounding box.
sascha@802:      * @param minX Min x coord of the world.
sascha@802:      * @param minY Min y coord of the world.
sascha@802:      * @param maxX Max x coord of the world.
sascha@802:      * @param maxY Max y coord of the world.
sascha@802:      */
sascha@437:     public IsoPolygonSeriesProducer(
sascha@437:         double minX, double minY,
sascha@437:         double maxX, double maxY
sascha@437:     ) {
sascha@465:         super(minX, minY, maxX, maxY);
sascha@437:     }
sascha@437: 
sascha@802:     /**
sascha@802:      * Returns a collection of series with line strings
sascha@802:      * with no AttributeGenerator.
sascha@802:      * @return The collection with line strings.
sascha@802:      */
sascha@437:     public Collection<PolygonSeries> getSeries() {
sascha@437:         return getSeries(null);
sascha@437:     }
sascha@437: 
sascha@802:     /**
sascha@802:      * Returns a collection of series with line strings.
sascha@802:      * The label attributes are generated with a given generator.
sascha@802:      * @param attributeGenerator The attribute generator. Maybe null
sascha@802:      * if no attributes should be generated.
sascha@802:      * @return The collection with the line strings.
sascha@802:      */
sascha@448:     public Collection<PolygonSeries> getSeries(
sascha@448:         AttributeGenerator attributeGenerator
sascha@448:     ) {
sascha@437:         ArrayList<PolygonSeries> series = new ArrayList<PolygonSeries>();
sascha@447: 
sascha@437:         double b1 = minX;
sascha@437:         double m1 = width != 1
sascha@437:             ? (maxX - minX)/(width-1)
sascha@437:             : 0d;
sascha@437: 
sascha@437:          double b2 = minY;
sascha@437:          double m2 = height != 1
sascha@437:             ? (maxY - minY)/(height-1)
sascha@437:             : 0d;
sascha@437: 
sascha@437:         TDoubleArrayList vertices = new TDoubleArrayList();
sascha@437: 
sascha@465:         for (IJKey key: joinPairs()) {
sascha@437:             PolygonSeries ps = new PolygonSeries();
sascha@437: 
sascha@437:             // process complete
sascha@437:             ArrayList<Edge> completeList = complete.get(key);
sascha@437:             if (completeList != null) {
sascha@437:                 for (Edge head: completeList) {
sascha@437:                     Edge current = head;
sascha@437:                     do {
sascha@437:                         vertices.add(m1*(current.a % width) + b1);
sascha@437:                         vertices.add(m2*(current.a / width) + b2);
sascha@437:                     }
sascha@437:                     while ((current = current.next) != head);
sascha@447:                     // add head again to close shape
sascha@447:                     vertices.add(m1*(head.a % width) + b1);
sascha@447:                     vertices.add(m2*(head.a / width) + b2);
sascha@437:                     ps.addRing(new CompactXYItems(vertices.toNativeArray()));
sascha@521:                     vertices.reset();
sascha@437:                 }
sascha@437:             }
sascha@437: 
sascha@437:             // process open
sascha@437:             TIntObjectHashMap map = commonOpen.get(key);
sascha@447: 
sascha@437:             if (map != null) {
sascha@465:                 for (Edge head: headList(map)) {
sascha@447: 
sascha@437:                     head = Vectorizer.simplify(head, width);
sascha@437:                     Edge current = head, last = head;
sascha@437:                     do {
sascha@437:                         vertices.add(m1*(current.a % width) + b1);
sascha@437:                         vertices.add(m2*(current.a / width) + b2);
sascha@437:                         last = current;
sascha@437:                     }
sascha@437:                     while ((current = current.next) != null);
sascha@437:                     // add b from tail
sascha@437:                     vertices.add(m1*(last.b % width) + b1);
sascha@437:                     vertices.add(m2*(last.b / width) + b2);
sascha@437:                     ps.addRing(new CompactXYItems(vertices.toNativeArray()));
sascha@521:                     vertices.reset();
sascha@437:                 } // for all in common open
sascha@437:             } // if map defined for key
sascha@447: 
sascha@801:             if (ps.getItemCount() > 0) {
sascha@801:                 series.add(ps);
sascha@801:                 if (attributeGenerator != null) {
sascha@448:                     Object attribute = attributeGenerator
sascha@448:                         .generateAttribute(key.i, key.j);
sascha@448: 
sascha@448:                     if (attribute != null) {
sascha@448:                         ps.setAttribute("label", attribute);
sascha@801:                     }
sascha@801:                 }
sascha@801:                 ps.setAttribute("line.width", LINE_WIDTH);
sascha@801:             }
sascha@437:         } // for all pairs
sascha@437: 
sascha@437:         return series;
sascha@437:     }
sascha@437: }
sascha@798: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :