physics/CollisionResponseHandler

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/* **-*-c++-*-**************************************************************
  Copyright (C)2003 David Jung <opensim@pobox.com>

  This program/file is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details. (http://www.gnu.org)
  
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  
  $Id: CollisionResponseHandler 1031 2004-02-11 20:46:36Z jungd $
  $Revision: 1.5 $
  $Date: 2004-02-11 15:46:36 -0500 (Wed, 11 Feb 2004) $
  $Author: jungd $
 
****************************************************************************/

#ifndef _PHYSICS_COLLISIONRESPONSEHANDLER_
#define _PHYSICS_COLLISIONRESPONSEHANDLER_

#include <physics/physics>

#include <physics/Collider>
#include <physics/CollidableBody>
#include <physics/CollisionDetector>


namespace physics {

class CollisionState;


class CollisionResponseHandler : public Collider
{
public:
  CollisionResponseHandler(ref<CollisionDetector> collisionDetector) : collisionDetector(collisionDetector) {}
  virtual ~CollisionResponseHandler() {}

  virtual void handleCollision(ref<CollisionState> collisionState) = 0;
  
  virtual void collide(ref<const Collidable> collidable1, ref<const Collidable> collidable2) 
    { 
      Assert( instanceof(*collidable1, const CollidableBody) );
      Assert( instanceof(*collidable2, const CollidableBody) );
      ref<const CollidableBody> body1( narrow_ref<const CollidableBody>(collidable1) );
      ref<const CollidableBody> body2( narrow_ref<const CollidableBody>(collidable2) );
      handleCollision(collisionDetector->getCollisionState(body1, body2)); 
    }
  virtual void collide(ref<const CollidableGroup> group) { Collider::collide(group); }

protected:
  CollisionResponseHandler() {}
  CollisionResponseHandler(const CollisionResponseHandler& h) : Collider(h) {}
  
  ref<CollisionDetector> collisionDetector; //!!! should be a weak pointer (as typically the detector has us as a listener - cyclic)
};


} // physics

#endif

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