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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS 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 THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*
*/
package com.sun.j3d.loaders.lw3d;
import java.util.Enumeration;
import javax.media.j3d.Alpha;
/**
* This Interpolator object modifies the intensity of a Light object
* according to the keyframes in a light intensity envelope
*/
class LightIntensityPathInterpolator extends FloatValueInterpolator {
LwLightObject theLight;
LightIntensityPathInterpolator(Alpha alpha,
float knots[],
float values[],
Object target) {
super(alpha, knots, values);
theLight = (LwLightObject)target;
}
/**
* This method is invoked by the behavior scheduler every frame. It maps
* the alpha value that corresponds to the current time into the
* appropriate light intensity for that time as obtained by interpolating
* between the light intensity values for each knot point that were passed
* to this class.
* @param criteria enumeration of criteria that have triggered this wakeup
*/
@Override
public void processStimulus(Enumeration criteria) {
// Handle stimulus
if (this.getAlpha() != null) {
// Let FloatValueInterpolator calculate the correct
// interpolated value
computePathInterpolation();
// Set light intensity to the value calculated by
// FloatValueInterpolator
if (theLight != null)
theLight.setIntensity(currentValue);
if ((this.getAlpha()).finished())
return;
}
wakeupOn(defaultWakeupCriterion);
}
}