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A GWT-compatible port of JBox2D, for use with PlayN games.
There is a newer version: 1.9.1
/*******************************************************************************
 * Copyright (c) 2011, 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.
 *     * Neither the name of the  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 DANIEL MURPHY 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 INTERRUPTION) HOWEVER CAUSED AND
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package org.jbox2d.dynamics;

import org.jbox2d.collision.shapes.Shape;

// updated to rev 100
/**
 * A fixture definition is used to create a fixture. This class defines an
 * abstract fixture definition. You can reuse fixture definitions safely.
 *
 * @author daniel
 */
public class FixtureDef {
	/**
	 * The shape, this must be set. The shape will be cloned, so you
	 * can create the shape on the stack.
	 */
	public Shape shape = null;
	
	/**
	 * Use this to store application specific fixture data.
	 */
	public Object userData;
	
	/**
	 * The friction coefficient, usually in the range [0,1].
	 */
	public float friction;
	
	/**
	 * The restitution (elasticity) usually in the range [0,1].
	 */
	public float restitution;
	
	/**
	 * The density, usually in kg/m^2
	 */
	public float density;
	
	/**
	 * A sensor shape collects contact information but never generates a collision
	 * response.
	 */
	public boolean isSensor;
	
	/**
	 * Contact filtering data;
	 */
	public Filter filter;
	
	public FixtureDef(){
		shape = null;
		userData = null;
		friction = 0.2f;
		restitution = 0f;
		density = 0f;
		filter = new Filter();
		filter.categoryBits = 0x0001;
		filter.maskBits = 0xFFFF;
		filter.groupIndex = 0;
		isSensor = false;
	}
}