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obj_face.h

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#ifndef __OBJECTFACE_H
#define __OBJECTFACE_H

class FacingInterface
{
protected:
  Object* obj;
  int dir;
  bool allow_setting; /* allow externals setting direction? default: NO */
  void SetDir( int new_dir ); /* convenience function: emits EVT_CHGFACE */
public:
  FacingInterface( Object* _obj, int _dir, bool _allow_setting ):
    obj( _obj ),
    dir( _dir ),
    allow_setting( _allow_setting ) {}
  virtual ~FacingInterface() {}
  virtual void Event( int evt ) {} 
  int Direction() { return dir; }
  void SetDirection( int new_dir ); 
};

class FacePassive: public FacingInterface
{
public:
  FacePassive( Object* _obj, int _dir ):
    FacingInterface( _obj, _dir, true ) {}
  virtual ~FacePassive() {}
  virtual void Event( int evt ) {}
  void SetDirection( int new_dir ) { dir = new_dir; }
};

// Whenever there is a bounce,
// reverse facing.
class FaceBouncing: public FacingInterface
{
public:
  FaceBouncing( Object* _obj, int _dir ):
    FacingInterface( _obj, _dir, false ) {}
  virtual ~FaceBouncing() {}
  virtual void Event( int evt );
};

// Whenever there is a bounce,
// reverse facing, but always in an
// upwards direction.
class FaceFrog: public FacingInterface
{
public:
  FaceFrog( Object* _obj, int _dir ):
    FacingInterface( _obj, _dir, false ) {}
  virtual ~FaceFrog() {}
  virtual void Event( int evt );
};

// When the player presses right or left,
// select the appropriate facing.
class FacePlayer: public FacingInterface
{
public:
  FacePlayer( Object* _obj, int _dir ):
    FacingInterface( _obj, _dir, false ) {}
  virtual ~FacePlayer() {}
  virtual void Event( int evt );
};

// Rotate facing continuously.
class FaceRotate: public FacingInterface
{
private:
  bool cwise;            
  int duration;          
  int count;             
public:
  FaceRotate( Object* _obj, int _dir, bool _cwise, int _ms ):
    FacingInterface( _obj, _dir, false ),
    cwise( _cwise ),
    duration( _ms ), count( _ms ) {}
  virtual ~FaceRotate() {}  
  virtual void Event( int evt ); 
};

#endif // __OBJECTFACE_H

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