source: orxonox.OLD/orxonox/trunk/src/world_entities/camera.h @ 4536

/*! 
    \file camera.h
    \brief Viewpoint controlling class definitions
*/ 

#ifndef _CAMERA_H
#define _CAMERA_H

#include "p_node.h"
#include "vector.h"
#include "event_listener.h"

class World;
class CameraTarget;
class Event;

//! an enumerator for different types of view
typedef enum ViewMode{ VIEW_NORMAL,
                       VIEW_BEHIND,
                       VIEW_FRONT,
                       VIEW_LEFT,
                       VIEW_RIGHT,
                       VIEW_TOP };

//! Camera
/**
   This class controls the viewpoint from which the World is rendered.
*/
class Camera : public PNode, public EventListener
{
 public:
  Camera(void);
  virtual ~Camera(void);

  void lookAt(PNode* target);
  PNode* getTarget();

  void setAspectRatio(float aspectRatio);
  void setFovy(float fovy);
  void setClipRegion(float nearClip, float farClip);

  void setViewMode(ViewMode mode);
  void tick(float dt);
  void apply (void);

  void process(const Event &event);

 private:
  CameraTarget*     target;          //!< The Target of the Camera (where this Camera Looks at)

  float             fovy;            //!< The field of view Angle (in degrees).
  float             aspectRatio;     //!< The aspect ratio (width / height).
  float             nearClip;        //!< The near clipping plane.
  float             farClip;         //!< The far clipping plane.

  Vector toRelCoor;                  //!< The relativeCoordinate to move the camera to.
  float toFovy;                      //!< The fovy-mode to iterate to.
};

//! A CameraTarget is where the Camera is looking at.
class CameraTarget : public PNode 
{
  friend class Camera;             //! The CameraTarget is a friend of Camera. noone else needs a CameraTarget, so noone else can create it.
  
 private:
  CameraTarget(void);
  
 public:
  virtual ~CameraTarget(void);
};


#endif /* _CAMERA_H */