/* * @(#)WarpImage.java	1.16 99/04/23 * * Copyright (c) 1998, 1999 by Sun Microsystems, Inc. All Rights Reserved. *  * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use, * modify and redistribute this software in source and binary code form, * provided that i) this copyright notice and license appear on all copies of * the software; and ii) Licensee does not utilize the software in a manner * which is disparaging to Sun. *  * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. *  * This software is not designed or intended for use in on-line control of * aircraft, air traffic, aircraft navigation or aircraft communications; or in * the design, construction, operation or maintenance of any nuclear * facility. Licensee represents and warrants that it will not use or * redistribute the Software for such purposes. */package demos.Images;import java.awt.*;import java.awt.event.*;import java.awt.geom.CubicCurve2D;import java.awt.geom.Point2D;import java.awt.geom.FlatteningPathIterator;import java.awt.geom.PathIterator;import AnimatingContext;import DemoSurface;import DemoPanel;/** * Warps a image on a CubicCurve2D flattened path. */public class WarpImage extends DemoSurface implements AnimatingContext {    private static int iw, ih, iw2, ih2;    private static Image img;    private static final int FORWARD = 0;    private static final int BACK = 1;    private Point2D pts[];    private int direction = FORWARD;    private int pNum;    private int x, y;    public WarpImage() {        setBackground(Color.white);        img = getImage("surfing.gif");        iw = img.getWidth(this);        ih = img.getHeight(this);        iw2 = iw/2;        ih2 = ih/2;    }    public void reset(int w, int h) {        pNum = 0;        direction = FORWARD;        CubicCurve2D cc = new CubicCurve2D.Float(                        w*.2f, h*.5f, w*.4f,0, w*.6f,h,w*.8f,h*.5f);        PathIterator pi = cc.getPathIterator(null, 0.1);        Point2D tmp[] = new Point2D[200];        int i = 0;        while ( !pi.isDone() ) {            float[] coords = new float[6];            switch ( pi.currentSegment(coords) ) {                case pi.SEG_MOVETO:                case pi.SEG_LINETO:                        tmp[i] = new Point2D.Float(coords[0], coords[1]);            }            i++;            pi.next();        }        pts = new Point2D[i];        System.arraycopy(tmp,0,pts,0,i);    }    public void step(int w, int h) {        if (pts == null) {            return;        }        x = (int) pts[pNum].getX();        y = (int) pts[pNum].getY();        if (direction == FORWARD)            if (++pNum == pts.length)                direction = BACK;        if (direction == BACK)            if (--pNum == 0)                direction = FORWARD;    }    public void drawDemo(int w, int h, Graphics2D g2) {        g2.drawImage(img,                        0,              0,              x,              y,                        0,              0,              iw2,            ih2,                        this);        g2.drawImage(img,                        x,              0,              w,              y,                        iw2,            0,              iw,             ih2,                        this);        g2.drawImage(img,                        0,              y,              x,              h,                        0,              ih2,            iw2,            ih,                        this);        g2.drawImage(img,                        x,              y,              w,              h,                        iw2,            ih2,            iw,             ih,                        this);    }    public static void main(String argv[]) {        final DemoPanel dp = new DemoPanel(new WarpImage());        Frame f = new Frame("Java2D Demo - WarpImage");        f.addWindowListener(new WindowAdapter() {            public void windowClosing(WindowEvent e) {System.exit(0);}            public void windowDeiconified(WindowEvent e) {                 dp.surface.start();             }            public void windowIconified(WindowEvent e) {                 dp.surface.stop();             }        });        f.add("Center", dp);        f.pack();        f.setSize(new Dimension(400,300));        f.show();        dp.surface.start();    }}