/*
* Copyright (c) 2006-2007 Erin Catto http:
*
* This software is provided 'as-is', without any express or implied
* warranty.  In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked, and must not be
* misrepresented the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/






/**
 * @class b2CollisionFilter
 * @constructor
 */
var b2CollisionFilter = function () {};
b2CollisionFilter.prototype = 
{

	// Return true if contact calculations should be performed between these two shapes.
	ShouldCollide: function(shape1, shape2){
		if (shape1.m_groupIndex == shape2.m_groupIndex && shape1.m_groupIndex != 0)
		{
			return shape1.m_groupIndex > 0;
		}

		var collide = (shape1.m_maskBits & shape2.m_categoryBits) != 0 && (shape1.m_categoryBits & shape2.m_maskBits) != 0;
		return collide;
	}
};

b2CollisionFilter.b2_defaultFilter = new b2CollisionFilter;