01: /*
02: * $RCSfile: CollisionDetector.java,v $
03: *
04: * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: *
10: * - Redistribution of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: *
13: * - Redistribution in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in
15: * the documentation and/or other materials provided with the
16: * distribution.
17: *
18: * Neither the name of Sun Microsystems, Inc. or the names of
19: * contributors may be used to endorse or promote products derived
20: * from this software without specific prior written permission.
21: *
22: * This software is provided "AS IS," without a warranty of any
23: * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
24: * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
25: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
26: * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
27: * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
28: * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
29: * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
30: * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
31: * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
32: * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
33: * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
34: * POSSIBILITY OF SUCH DAMAGES.
35: *
36: * You acknowledge that this software is not designed, licensed or
37: * intended for use in the design, construction, operation or
38: * maintenance of any nuclear facility.
39: *
40: * $Revision: 1.2 $
41: * $Date: 2007/02/09 17:21:33 $
42: * $State: Exp $
43: */
44:
45: package org.jdesktop.j3d.examples.collision;
46:
47: import java.util.Enumeration;
48: import javax.media.j3d.*;
49: import javax.vecmath.*;
50:
51: public class CollisionDetector extends Behavior {
52: private static final Color3f highlightColor = new Color3f(0.0f,
53: 1.0f, 0.0f);
54: private static final ColoringAttributes highlight = new ColoringAttributes(
55: highlightColor, ColoringAttributes.SHADE_GOURAUD);
56:
57: private boolean inCollision = false;
58: private Shape3D shape;
59: private ColoringAttributes shapeColoring;
60: private Appearance shapeAppearance;
61:
62: private WakeupOnCollisionEntry wEnter;
63: private WakeupOnCollisionExit wExit;
64:
65: public CollisionDetector(Shape3D s) {
66: shape = s;
67: shapeAppearance = shape.getAppearance();
68: shapeColoring = shapeAppearance.getColoringAttributes();
69: inCollision = false;
70: }
71:
72: public void initialize() {
73: wEnter = new WakeupOnCollisionEntry(shape);
74: wExit = new WakeupOnCollisionExit(shape);
75: wakeupOn(wEnter);
76: }
77:
78: public void processStimulus(Enumeration criteria) {
79: inCollision = !inCollision;
80:
81: if (inCollision) {
82: shapeAppearance.setColoringAttributes(highlight);
83: wakeupOn(wExit);
84: } else {
85: shapeAppearance.setColoringAttributes(shapeColoring);
86: wakeupOn(wEnter);
87: }
88: }
89: }
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