/**
* Java Modular Image Synthesis Toolkit (JMIST)
* Copyright (C) 2008-2013 Bradley W. Kimmel
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package ca.eandb.jmist.framework.job.mlt;
import ca.eandb.jmist.framework.Random;
import ca.eandb.jmist.framework.path.Path;
import ca.eandb.jmist.framework.path.PathNode;
/**
* @author brad
*
*/
public final class LensPerturbationPathMutator implements PathMutator {
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.job.mlt.PathMutator#getTransitionPDF(ca.eandb.jmist.framework.path.Path, ca.eandb.jmist.framework.path.Path)
*/
public double getTransitionPDF(Path from, Path to) {
// TODO Auto-generated method stub
return 0;
}
/* (non-Javadoc)
* @see ca.eandb.jmist.framework.job.mlt.PathMutator#mutate(ca.eandb.jmist.framework.path.Path, ca.eandb.jmist.framework.Random)
*/
public Path mutate(Path path, Random rnd) {
int s = path.getLightPathLength();
int t = path.getEyePathLength();
path = path.slice(s + t - 1, 0);
if (path == null) {
return null;
}
PathNode newEyeTail = path.getEyeTail();
PathNode newLightTail = path.getLightTail();
newEyeTail = newEyeTail.expand(rnd.next(), rnd.next(), rnd.next()); // FIXME
return new Path(newLightTail, newEyeTail);
}
}