/*
* Project Wonderland
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., All Rights Reserved
*
* Redistributions in source code form must reproduce the above
* copyright and this condition.
*
* The contents of this file are subject to the GNU General Public
* License, Version 2 (the "License"); you may not use this file
* except in compliance with the License. A copy of the License is
* available at http://www.opensource.org/licenses/gpl-license.php.
*
* Sun designates this particular file as subject to the "Classpath"
* exception as provided by Sun in the License file that accompanied
* this code.
*/
package org.jdesktop.wonderland.modules.animationbase.client.interpolators;
import com.jme.math.Quaternion;
import com.jme.math.Vector3f;
import org.pushingpixels.trident.interpolator.PropertyInterpolator;
/**
* An interpolator for Quaternion coordinates
*
* Usage:
* toTurn.fromAngleAxis((float) (Math.PI / 12), new Vector3f(0, 1, 0));
* toRoll.fromAngleAxis((float) -(Math.PI / 12), new Vector3f(1, 0, 0));
*
* step = toTurn.mult(initialQuat);
* to = toRoll.mult(step);
*
* timeline.addPropertyToInterpolate("RotQuat", initialQuat, to, new QuaternionInterpolator());
*
* @author morrisford
*/
public class QuaternionInterpolator implements PropertyInterpolator {
public Quaternion interpolate(Object from, Object to, float timelinePosition) {
Vector3f fromAxis = new Vector3f();
Vector3f toAxis = new Vector3f();
Quaternion newQuat = new Quaternion();
float fromAngle = ((Quaternion)from).toAngleAxis(fromAxis);
float toAngle = ((Quaternion)to).toAngleAxis(toAxis);
newQuat.fromAngleAxis(fromAngle + (toAngle - fromAngle) * timelinePosition,
new Vector3f(fromAxis.x + (toAxis.x - fromAxis.x) * timelinePosition,
fromAxis.y + (toAxis.y - fromAxis.y) * timelinePosition,
fromAxis.z + (toAxis.z - fromAxis.z) * timelinePosition));
return newQuat;
}
public Class getBasePropertyClass() {
return null;
}
}