ingo@1115: /*
ingo@1115:  * Copyright (c) 2010 by Intevation GmbH
ingo@1115:  *
ingo@1115:  * This program is free software under the LGPL (>=v2.1)
ingo@1115:  * Read the file LGPL.txt coming with the software for details
ingo@1115:  * or visit http://www.gnu.org/licenses/ if it does not exist.
ingo@1115:  */
ingo@1115: 
sascha@521: package de.intevation.gnv.state.profile.verticalcrosssection;
sascha@521: 
sascha@521: import de.intevation.gnv.jfreechart.CompactXYItems;
sascha@521: import de.intevation.gnv.jfreechart.PolygonSeries;
sascha@521: 
sascha@521: import de.intevation.gnv.math.Interpolation3D;
sascha@521: 
sascha@521: import gnu.trove.TDoubleArrayList;
sascha@521: 
sascha@521: import org.apache.log4j.Logger;
sascha@521: 
sascha@521: /**
sascha@780:  * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
sascha@521:  */
sascha@521: public class OutputHelper
sascha@521: {
sascha@521:     private static Logger log = Logger.getLogger(OutputHelper.class);
sascha@521: 
sascha@521:     public static final double EPS = 1e-5d;
sascha@521: 
sascha@521:     private OutputHelper() {
sascha@521:     }
sascha@521: 
ingo@804: 
ingo@804:     /**
ingo@804:      * Creates a PolygonSeries representing the seabed used to be displayed in a
ingo@804:      * 2D-chart.
ingo@804:      *
ingo@804:      * @param interpolation The interpolation which supports information about
ingo@804:      * the max depth, the cell width and height.
ingo@804:      * @param fill The fill color as integer.
ingo@804:      * @return a PolygonSeries representing the seabed.
ingo@804:      */
sascha@521:     public static PolygonSeries createSeabedPolygon(
sascha@521:         Interpolation3D interpolation,
sascha@521:         Integer         fill
sascha@521:     ) {
sascha@521:         double maxDepth   = interpolation.getMaxDepth();
sascha@521:         double cellWidth  = interpolation.getCellWidth();
sascha@521:         double cellHeight = interpolation.getCellHeight();
sascha@521: 
sascha@521:         double [] depths = interpolation.getDepths();
sascha@521: 
sascha@521:         double x = 0d;
sascha@521: 
sascha@521:         TDoubleArrayList vertices = new TDoubleArrayList();
sascha@521: 
sascha@521:         PolygonSeries ps = new PolygonSeries();
sascha@521: 
sascha@521:         for (int i = 0; i < depths.length; ++i, x += cellWidth) {
sascha@521:             double depth = depths[i];
sascha@521: 
sascha@521:             if (vertices.isEmpty()) {
sascha@521:                 if (Double.isNaN(depth) || depth == maxDepth) {
sascha@521:                     continue;
sascha@521:                 }
sascha@521:                 if (depth > 0d) depth = 0d;
sascha@521:                 vertices.add(x); vertices.add(maxDepth);
sascha@521:                 vertices.add(x); vertices.add(depth);
sascha@521:                 vertices.add(x+cellWidth); vertices.add(depth);
sascha@521:             }
sascha@521:             else { // in polygon
sascha@521:                 if (Double.isNaN(depth) || depth == maxDepth) {
sascha@521:                     vertices.add(x); vertices.add(maxDepth);
sascha@521:                     ps.addRing(new CompactXYItems(vertices.toNativeArray()));
sascha@521:                     vertices.reset();
sascha@521:                 }
sascha@521:                 else {
sascha@521:                     if (depth > 0d) depth = 0d;
sascha@521:                     int N = vertices.size();
sascha@521:                     if (N > 2 && Math.abs(depth - vertices.get(N-1)) < EPS) {
sascha@521:                         vertices.set(N-2, x+cellWidth);
sascha@521:                     }
sascha@521:                     else {
sascha@521:                         vertices.add(vertices.get(N-2)); vertices.add(depth);
sascha@521:                         vertices.add(x+cellWidth); vertices.add(depth);
sascha@521:                     }
sascha@521:                 }
sascha@521:             }
sascha@521:         } // for all depths
sascha@521: 
sascha@521:         if (!vertices.isEmpty()) {
sascha@521:             vertices.add(vertices.get(vertices.size()-2));
sascha@521:             vertices.add(maxDepth);
sascha@521:             ps.addRing(new CompactXYItems(vertices.toNativeArray()));
sascha@521:         }
sascha@521: 
sascha@521:         if (ps.getItemCount() == 0) {
sascha@521:             return null;
sascha@521:         }
sascha@521: 
sascha@521:         ps.setAttribute("fill", fill);
sascha@521: 
sascha@521:         return ps;
sascha@521:     }
sascha@521: }
sascha@521: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :