01: /*
02: * $RCSfile: MorphingBehavior.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
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25: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
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39: *
40: * $Revision: 1.2 $
41: * $Date: 2007/02/09 17:21:48 $
42: * $State: Exp $
43: */
44:
45: package org.jdesktop.j3d.examples.picking;
46:
47: import java.util.Enumeration;
48: import javax.media.j3d.*;
49: import javax.vecmath.*;
50:
51: // User-defined morphing behavior class
52: public class MorphingBehavior extends Behavior {
53:
54: Alpha alpha;
55: Morph morph;
56: double weights[];
57:
58: WakeupOnElapsedFrames w = new WakeupOnElapsedFrames(0);
59:
60: // Override Behavior's initialize method to setup wakeup criteria
61: public void initialize() {
62: alpha.setStartTime(System.currentTimeMillis());
63:
64: // Establish initial wakeup criteria
65: wakeupOn(w);
66: }
67:
68: // Override Behavior's stimulus method to handle the event
69: public void processStimulus(Enumeration criteria) {
70:
71: // NOTE: This assumes 3 objects. It should be generalized to
72: // "n" objects.
73:
74: double val = alpha.value();
75: if (val < 0.5) {
76: double a = val * 2.0;
77: weights[0] = 1.0 - a;
78: weights[1] = a;
79: weights[2] = 0.0;
80: } else {
81: double a = (val - 0.5) * 2.0;
82: weights[0] = 0.0;
83: weights[1] = 1.0f - a;
84: weights[2] = a;
85: }
86:
87: morph.setWeights(weights);
88:
89: // Set wakeup criteria for next time
90: wakeupOn(w);
91: }
92:
93: public MorphingBehavior(Alpha a, Morph m) {
94: alpha = a;
95: morph = m;
96: weights = morph.getWeights();
97: }
98: }
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