Filter.java

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 * Copyright (c) 2011, Daniel Murphy
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package org.jbox2d.dynamics;

// updated to rev 100
/**
 * This holds contact filtering data.
 * 
 * @author daniel
 */
public class Filter {
	/**
	 * The collision category bits. Normally you would just set one bit.
	 */
	public int categoryBits;
	
	/**
	 * The collision mask bits. This states the categories that this
	 * shape would accept for collision.
	 */
	public int maskBits;
	
	/**
	 * Collision groups allow a certain group of objects to never collide (negative)
	 * or always collide (positive). Zero means no collision group. Non-zero group
	 * filtering always wins against the mask bits.
	 */
	public int groupIndex;
	
	public void set(Filter argOther) {
		categoryBits = argOther.categoryBits;
		maskBits = argOther.maskBits;
		groupIndex = argOther.groupIndex;
	}
}