//  $Id: user_pointer.hpp 839 2006-10-24 00:01:56Z hiker $
//
//  SuperTuxKart - a fun racing game with go-kart
//  Copyright (C) 2007 Joerg Henrichs
//
//  This program 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 3
//  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.
//
//  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.

#ifndef HEADER_USER_POINTER_H
#define HEADER_USER_POINTER_H

/** Some bullet objects store 'user pointers'. This is a base class
 *  that allows to easily determine the type of the user pointer.
 */
class TriangleMesh;
class Moveable;
class Flyable;
class Kart;
class MovingPhysics;

class UserPointer
{
public:
    enum   UserPointerType {UP_UNDEF, UP_KART, UP_FLYABLE, UP_TRACK,
                            UP_MOVING_PHYSICS};
private:
    void*  m_pointer;
    UserPointerType m_user_pointer_type;
public:
    bool            is(UserPointerType t)     const {return m_user_pointer_type==t;    }
    TriangleMesh*   getPointerTriangleMesh()  const {return (TriangleMesh*)m_pointer;  }
    Moveable*       getPointerMoveable()      const {return (Moveable*)m_pointer;      }
    Flyable*        getPointerFlyable()       const {return (Flyable*)m_pointer;       }
    Kart*           getPointerKart()          const {return (Kart*)m_pointer;          }
    MovingPhysics*  getPointerMovingPhysics() const {return (MovingPhysics*)m_pointer; }
    void            set(MovingPhysics* p) { m_user_pointer_type=UP_MOVING_PHYSICS;
                                            m_pointer          =p;           }
    void            set(Kart* p)          { m_user_pointer_type=UP_KART;
                                            m_pointer          =p;           }
    void            set(Flyable* p)       { m_user_pointer_type=UP_FLYABLE;
                                            m_pointer          =p;           }
    void            set(TriangleMesh* p)  { m_user_pointer_type=UP_TRACK;
                                            m_pointer          =p;           }
                    UserPointer()         { zero();                          }
    void            zero()                { m_user_pointer_type=UP_UNDEF;
                                            m_pointer          = NULL;       }
};
#endif
/* EOF */