/*
  * Copyright (c) 2006-2007 Erin Catto 
* 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.
*/

var b2CollisionFilter = Class.create();
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;
        },

        initialize: function() {}};
b2CollisionFilter.b2_defaultFilter = new b2CollisionFilter;



  *
  * 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.
  */
  
  var b2CollisionFilter = Class.create();
  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;
          },
  
          initialize: function() {}};
  b2CollisionFilter.b2_defaultFilter = new b2CollisionFilter;