001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/ogcwebservices/wpvs/j3d/TriangleTerrain.java $
002    /*----------------------------------------------------------------------------
003     This file is part of deegree, http://deegree.org/
004     Copyright (C) 2001-2009 by:
005       Department of Geography, University of Bonn
006     and
007       lat/lon GmbH
008    
009     This library is free software; you can redistribute it and/or modify it under
010     the terms of the GNU Lesser General Public License as published by the Free
011     Software Foundation; either version 2.1 of the License, or (at your option)
012     any later version.
013     This library is distributed in the hope that it will be useful, but WITHOUT
014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016     details.
017     You should have received a copy of the GNU Lesser General Public License
018     along with this library; if not, write to the Free Software Foundation, Inc.,
019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020    
021     Contact information:
022    
023     lat/lon GmbH
024     Aennchenstr. 19, 53177 Bonn
025     Germany
026     http://lat-lon.de/
027    
028     Department of Geography, University of Bonn
029     Prof. Dr. Klaus Greve
030     Postfach 1147, 53001 Bonn
031     Germany
032     http://www.geographie.uni-bonn.de/deegree/
033    
034     e-mail: info@deegree.org
035    ----------------------------------------------------------------------------*/
036    
037    package org.deegree.ogcwebservices.wpvs.j3d;
038    
039    import java.awt.image.BufferedImage;
040    import java.util.ArrayList;
041    import java.util.List;
042    
043    import javax.vecmath.Point3d;
044    import javax.vecmath.Point3f;
045    import javax.vecmath.TexCoord2f;
046    
047    import org.deegree.framework.log.ILogger;
048    import org.deegree.framework.log.LoggerFactory;
049    import org.deegree.model.spatialschema.Envelope;
050    import org.deegree.model.spatialschema.Position;
051    import org.deegree.ogcwebservices.wpvs.utils.VisADWrapper;
052    
053    import com.sun.j3d.utils.geometry.GeometryInfo;
054    import com.sun.j3d.utils.geometry.NormalGenerator;
055    
056    /**
057     * The <code>TriangleTerrain</code> class respresents the Java3D shape of a set of measurepoints. Before this Terrrain
058     * can be drawn the createTerrain method must be invoked, it will create triangles of the given measurepoints and will
059     * add the optional texture to the apearance of the Shap3D.
060     *
061     * @author <a href="mailto:bezema@lat-lon.de">Rutger Bezema</a>
062     *
063     * @author last edited by: $Author: mschneider $
064     *
065     * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
066     *
067     */
068    
069    public class TriangleTerrain extends TerrainModel {
070    
071        private static ILogger LOG = LoggerFactory.getLogger( TriangleTerrain.class );
072    
073        private Envelope boundingBox;
074    
075        private double terrainWidth;
076    
077        private double terrainHeight;
078    
079        private List<Point3d> measurePoints = null;
080    
081        private double minimalHeightlevel;
082    
083    
084        private double scale;
085    
086        /**
087         * @param measurePoints
088         *            indicating height values inside this terrain. They will be triangulated in the createTerrain method.
089         * @param env the bbox of this triangle terrain.
090         * @param minimalHeightlevel
091         *            which will be used if the measurepoints have no height set.
092         * @param scale
093         *            to multiply onto the z-value of the measurepoints
094         */
095        public TriangleTerrain( List<Point3d> measurePoints, Envelope env, double minimalHeightlevel, double scale ) {
096            super();
097            this.measurePoints = measurePoints;
098            this.minimalHeightlevel = minimalHeightlevel;
099            this.scale = scale;
100    
101            boundingBox = env;
102    
103            this.terrainWidth = boundingBox.getWidth();
104            this.terrainHeight = boundingBox.getHeight();
105        }
106    
107        /**
108         * @return the boundingBox of this TriangleTerrain
109         */
110        public Envelope getBoundingBox() {
111            return boundingBox;
112        }
113    
114        @Override
115        public void createTerrain() {
116             List<float[][]> triangles = new ArrayList<float[][]>();
117            if ( measurePoints == null || measurePoints.size() == 0 ) { // just a square, asssuming a simple plane,
118                triangles = createFlatTerrain(  );
119            } else {
120                LOG.logDebug( "Trying to create triangles with the visad library" );
121                long time = System.currentTimeMillis();
122                VisADWrapper vw = new VisADWrapper( measurePoints, scale );
123                triangles = vw.getTriangleCollectionAsList();
124                if( triangles != null ){
125                    LOG.logDebug( new StringBuilder("Creation of ").append( triangles.size()).append( " triangles with the visad library was successfull. (took: ").append( (System.currentTimeMillis() - time) / 1000d).append(" seconds).").toString() );
126                } else{
127                    LOG.logDebug( new StringBuilder("Creation of triangles with the visad library was NOT successfull. Creating a flat terrain.").toString() );
128                    triangles = createFlatTerrain( );
129                }
130    
131            }
132    
133            double widthInv = 1d / terrainWidth;
134            double heightInv = 1d / terrainHeight;
135            Position originalLowerLeft = boundingBox.getMin();
136    
137            GeometryInfo geometryInfo = new GeometryInfo( GeometryInfo.TRIANGLE_ARRAY );
138    
139            BufferedImage texture = getTexture();
140            if ( texture != null ){
141                geometryInfo.setTextureCoordinateParams( 1, 2 );
142            }
143    
144            Point3f[] coordinates = new Point3f[triangles.size() * 3];
145            TexCoord2f[] texCoords = new TexCoord2f[triangles.size() * 3];
146    
147            int coordNr = 0;
148            for ( float[][] triangleCoords : triangles ) {
149                for ( int k = 0; k < 3; k++ ) {
150                    // System.out.println( Thread.currentThread() + "-> coordNR: " + coordNr );
151                    Point3f modelCoordinate = new Point3f( triangleCoords[k][0], triangleCoords[k][1], triangleCoords[k][2] );
152                    coordinates[coordNr] = modelCoordinate;
153    
154                    if ( texture != null ) {
155                        double texCoordX = ( modelCoordinate.x - originalLowerLeft.getX() ) * widthInv;
156                        double texCoordY = ( modelCoordinate.y - originalLowerLeft.getY() ) * heightInv;
157                        texCoordX = ( texCoordX > 1 ) ? 1 : ( ( texCoordX < 0 ) ? 0 : texCoordX );
158                        texCoordY = ( texCoordY > 1 ) ? 1 : ( ( texCoordY < 0 ) ? 0 : texCoordY );
159                        texCoords[coordNr] = new TexCoord2f( (float)texCoordX ,(float) texCoordY );
160                    }
161                    coordNr++;
162                }
163    
164            }
165            geometryInfo.setCoordinates( coordinates );
166            if ( texture != null ) {
167                geometryInfo.setTextureCoordinates( 0, texCoords );
168            }
169            geometryInfo.recomputeIndices();
170            NormalGenerator ng = new NormalGenerator();
171            ng.generateNormals( geometryInfo );
172    
173            setGeometry( geometryInfo.getGeometryArray() );
174        }
175    
176        private List<float[][]> createFlatTerrain( ){
177            LOG.logDebug( "Creating a flat square at minimalTerrain height, which will represent the terrain." );
178            List<float[][]> triangles = new ArrayList<float[][]>();
179            Position min = boundingBox.getMin();
180            Position max = boundingBox.getMax();
181            float[][] triangle = new float[3][3];
182            triangle[0][0] = (float) min.getX();
183            triangle[0][1] = (float) min.getY();
184            triangle[0][2] = (float) minimalHeightlevel;
185    
186            triangle[1][0] = (float) max.getX();
187            triangle[1][1] = (float) min.getY();
188            triangle[1][2] = (float) minimalHeightlevel;
189    
190            triangle[2][0] = (float) min.getX();
191            triangle[2][1] = (float) max.getY();
192            triangle[2][2] = (float) minimalHeightlevel;
193    
194            triangles.add( triangle );
195    
196            triangle = new float[3][3];
197            triangle[0][0] = (float) max.getX();
198            triangle[0][1] = (float) min.getY();
199            triangle[0][2] = (float) minimalHeightlevel;
200    
201            triangle[1][0] = (float) max.getX();
202            triangle[1][1] = (float) max.getY();
203            triangle[1][2] = (float) minimalHeightlevel;
204    
205            triangle[2][0] = (float) min.getX();
206            triangle[2][1] = (float) max.getY();
207            triangle[2][2] = (float) minimalHeightlevel;
208            triangles.add( triangle );
209            return triangles;
210        }
211    
212    }