01: /*
02: * $RCSfile: LightIntensityPathInterpolator.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: 1.4 $
41: * $Date: 2007/02/09 17:20:07 $
42: * $State: Exp $
43: */
44:
45: package com.sun.j3d.loaders.lw3d;
46:
47: import java.util.*;
48:
49: import javax.media.j3d.Alpha;
50: import javax.media.j3d.Light;
51:
52: /**
53: * This Interpolator object modifies the intensity of a Light object
54: * according to the keyframes in a light intensity envelope
55: */
56: class LightIntensityPathInterpolator extends FloatValueInterpolator {
57:
58: LwLightObject theLight;
59:
60: LightIntensityPathInterpolator(Alpha alpha, float knots[],
61: float values[], Object target) {
62:
63: super (alpha, knots, values);
64: theLight = (LwLightObject) target;
65: }
66:
67: /**
68: * This method is invoked by the behavior scheduler every frame. It maps
69: * the alpha value that corresponds to the current time into the
70: * appropriate light intensity for that time as obtained by interpolating
71: * between the light intensity values for each knot point that were passed
72: * to this class.
73: * @param criteria enumeration of criteria that have triggered this wakeup
74: */
75:
76: public void processStimulus(Enumeration criteria) {
77: // Handle stimulus
78:
79: if (this .getAlpha() != null) {
80:
81: // Let FloatValueInterpolator calculate the correct
82: // interpolated value
83: computePathInterpolation();
84:
85: // Set light intensity to the value calculated by
86: // FloatValueInterpolator
87: if (theLight != null)
88: theLight.setIntensity(currentValue);
89:
90: if ((this.getAlpha()).finished())
91: return;
92: }
93:
94: wakeupOn(defaultWakeupCriterion);
95:
96: }
97:
98: }
|