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.image;
031
032import javax.swing.JFrame;
033
034import org.openimaj.demos.Demo;
035import org.openimaj.image.DisplayUtilities;
036import org.openimaj.image.MBFImage;
037import org.openimaj.image.colour.ColourSpace;
038import org.openimaj.image.colour.RGBColour;
039import org.openimaj.math.geometry.shape.Ellipse;
040import org.openimaj.math.geometry.transforms.TransformUtilities;
041
042import Jama.Matrix;
043
044/**
045 *      Demonstrates affine transforms for shapes.      
046 * 
047 *  @author Sina Samangooei (ss@ecs.soton.ac.uk)
048 *      
049 *      @created 15 Feb 2012
050 */
051@Demo(
052        author = "Sina Samangooei", 
053        description = "Demonstrates affine transforms for shapes.", 
054        keywords = { "shape", "affine", "transform" }, 
055        title = "Affine Shape Transforms",
056        icon = "/org/openimaj/demos/icons/image/affine-icon.png"
057)
058public class TestShapeTransforms {
059        private static Runnable displayUpdater;
060        private static JFrame frame;
061        private static double rotation = Math.PI*2/4;
062        private static Ellipse ellipse;
063        private static MBFImage image;
064
065        /**
066         *      Default main
067         *  @param args Command-line arguments
068         */
069        public static void main(String args[]){
070                ellipse = new Ellipse(400,400,100,50,0);
071                image = new MBFImage(800,800,ColourSpace.RGB);
072                frame = DisplayUtilities.display(image);
073                displayUpdater = new Runnable(){
074                        @Override
075                        public void run() {
076                                while(true){
077                                        DisplayUtilities.display(image,frame);
078                                        update();
079                                        try {
080                                                Thread.sleep(1000/30);
081                                        } catch (InterruptedException e) {
082                                        }
083                                }
084                        }
085                        
086                };
087                Thread t = new Thread(displayUpdater);
088                t.start();
089        }
090        
091        private static void update() {
092                rotation += Math.PI/30;
093//              int dx = 100;
094//              int dy = 100;
095//              float x = (float) (Math.cos(rotation) * dx + Math.sin(rotation) * dy);
096//              float y = (float) (-Math.sin(rotation) * dx + Math.cos(rotation) * dy);
097                Matrix rotMat = TransformUtilities.rotationMatrixAboutPoint(rotation, ellipse.calculateCentroid().getX(), ellipse.calculateCentroid().getY());
098//              Matrix transMat = TransformUtilities.translateMatrix(x, y);
099                Matrix scaleMat = TransformUtilities.scaleMatrix(Math.abs(0.5 * Math.cos(rotation)) + 1, Math.abs(0.5 * Math.sin(rotation))+ 1);
100                Matrix scaledTrans = scaleMat.times(TransformUtilities.translateMatrix(-ellipse.calculateCentroid().getX(), -ellipse.calculateCentroid().getY()));
101                scaledTrans = TransformUtilities.translateMatrix(ellipse.calculateCentroid().getX(), ellipse.calculateCentroid().getY()).times(scaledTrans);
102                Matrix transform = Matrix.identity(3, 3);
103                transform = rotMat.times(transform);
104//              transform = transMat.times(transform);
105//              transform = scaledTrans.times(transform);
106                image.fill(RGBColour.BLACK);
107                image.createRenderer().drawShapeFilled(ellipse.transformAffine(transform), RGBColour.RED);
108        }
109        
110}