/*******************************************************************************
* Copyright (c) 2013, Daniel Murphy
* All rights reserved.
*
* 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.
*
* 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 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
/**
* Created at 4:25:42 AM Jul 15, 2010
*/
package org.jbox2d.callbacks;
import org.jbox2d.dynamics.Filter;
import org.jbox2d.dynamics.Fixture;
// updated to rev 100
/**
* Implement this class to provide collision filtering. In other words, you can implement
* this class if you want finer control over contact creation.
* @author Daniel Murphy
*/
public class ContactFilter {
/**
* Return true if contact calculations should be performed between these two shapes.
* @warning for performance reasons this is only called when the AABBs begin to overlap.
* @param fixtureA
* @param fixtureB
* @return
*/
public boolean shouldCollide(Fixture fixtureA, Fixture fixtureB){
Filter filterA = fixtureA.getFilterData();
Filter filterB = fixtureB.getFilterData();
if (filterA.groupIndex == filterB.groupIndex && filterA.groupIndex != 0){
return filterA.groupIndex > 0;
}
boolean collide = (filterA.maskBits & filterB.categoryBits) != 0 &&
(filterA.categoryBits & filterB.maskBits) != 0;
return collide;
}
}