InterpolatorTimer.java

/**
 * Copyright (c) 2003-2009, Xith3D Project Group all rights reserved.
 * 
 * Portions based on the Java3D interface, Copyright by Sun Microsystems.
 * Many thanks to the developers of Java3D and Sun Microsystems for their
 * innovation and design.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions 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 the 'Xith3D Project Group' nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 */
package org.xith3d.utility.math;

import org.xith3d.loop.UpdatingThread.TimingMode;
import org.xith3d.loop.opscheduler.impl.ScheduledOperationImpl;

/**
 * Time an interpolator..
 * 
 * @author Amos Wenger (aka BlueSky)
 * @see #interpolator
 */
public class InterpolatorTimer extends ScheduledOperationImpl {
    
    private Interpolator interpolator;
    private long beginTime;
    private long endTime;
    private long extent;
    
    public InterpolatorTimer(Interpolator interpolator, long beginTime, long endTime) {
        
        super(true);
        
        this.interpolator = interpolator;
        this.beginTime = beginTime;
        this.endTime = endTime;
        this.extent = endTime - beginTime;
        
    }

    public void update(long gameTime, long frameTime, TimingMode timingMode) {
        
        final long millis = timingMode.getMilliSeconds(gameTime);
        
        if(millis > endTime) {
            this.setAlive(false); // Die !!
            return;
        }
        
        interpolator.setAlpha((millis - beginTime) / extent);
        
    }
    
}