001/**
002 * Copyright (c) 2011, The University of Southampton and the individual contributors.
003 * All rights reserved.
004 *
005 * Redistribution and use in source and binary forms, with or without modification,
006 * are permitted provided that the following conditions are met:
007 *
008 *   *  Redistributions of source code must retain the above copyright notice,
009 *      this list of conditions and the following disclaimer.
010 *
011 *   *  Redistributions in binary form must reproduce the above copyright notice,
012 *      this list of conditions and the following disclaimer in the documentation
013 *      and/or other materials provided with the distribution.
014 *
015 *   *  Neither the name of the University of Southampton nor the names of its
016 *      contributors may be used to endorse or promote products derived from this
017 *      software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package org.openimaj.demos.core;
031
032import java.util.ArrayList;
033import java.util.Arrays;
034import java.util.List;
035
036import org.openimaj.demos.Demo;
037import org.openimaj.image.DisplayUtilities;
038import org.openimaj.image.FImage;
039import org.openimaj.image.renderer.FImageRenderer;
040import org.openimaj.math.geometry.point.Point2d;
041import org.openimaj.math.geometry.point.Point2dImpl;
042import org.openimaj.math.geometry.shape.Triangle;
043import org.openimaj.math.geometry.triangulation.DelaunayTriangulator;
044
045/**
046 *      Demonstrates the OpenIMAJ implementation of Delaunay 
047 *      triangulation. Displays the triangulation of a set of pre-defined
048 *      points.
049 * 
050 *  @author Jonathon Hare (jsh2@ecs.soton.ac.uk)
051 *      
052 *      @created 15 Feb 2012
053 */
054@Demo(
055        author = "Jonathon Hare", 
056        description = "Demonstrates the OpenIMAJ implementation of Delaunay " +
057                        "triangulation. Displays the triangulation of a set of pre-defined " +
058                        "points.", 
059        keywords = { "delaunay", "triangulation", "math", "geometry" }, 
060        title = "Delaunay Triangulation",
061        icon = "/org/openimaj/demos/icons/core/delaunay-icon.png"
062)
063public class Triangulation {
064        /**
065         *      Default main
066         *  @param args Command-line arguments
067         */
068        public static void main(String [] args) {
069                Point2d[] pixels = {
070                                new Point2dImpl(0,0),
071                                new Point2dImpl(100,0),
072                                new Point2dImpl(20,20),
073                                new Point2dImpl(40,20),
074                                new Point2dImpl(60,20),
075                                new Point2dImpl(80,20),
076                                new Point2dImpl(45,55),
077                                new Point2dImpl(55,55),
078                                new Point2dImpl(50,60),
079                                new Point2dImpl(30,65),
080                                new Point2dImpl(70,65),
081                                new Point2dImpl(0,100),
082                                new Point2dImpl(100,100),
083                };
084                
085                List<Triangle> tris = DelaunayTriangulator.triangulate(new ArrayList<Point2d>(Arrays.asList(pixels)));
086                
087                FImage image = new FImage(101, 101);
088                FImageRenderer renderer = image.createRenderer();
089                
090                for (Triangle t : tris) {
091                        renderer.drawShape(t, 1f);
092                }
093                System.out.println(tris);
094                DisplayUtilities.display(image);
095        }
096}