text: //========= Copyright Valve Corporation, All rights reserved. ============//
  //
  // Purpose: 
  //
  // $NoKeywords: $
  //
  //=============================================================================//
  
  // A set of collision rules
  // NOTE: Defaults to all indices disabled
  class IPhysicsCollisionSet
  {
  public:
  	~IPhysicsCollisionSet() {}
  
  	virtual void EnableCollisions( int index0, int index1 ) = 0;
  	virtual void DisableCollisions( int index0, int index1 ) = 0;
  
  	virtual bool ShouldCollide( int index0, int index1 ) = 0;
  };