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Camera.h

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#ifndef _CAMERA_H_
#define _CAMERA_H_

#include <iostream>
#include <cmath>
using namespace std;

#include <GL/gl.h>
#include <GL/glu.h>
#include "SDL.h"

#include "FrameRate.h"
#include "Object.h"
#include "Vector3.h"
#include "VectorMath.h"

class Camera
{
public:
  Camera ();
  virtual ~ Camera ();
  
  // Camera interface //
  void positionCamera (double position[], double view[], double upVector[]);
  void positionCamera (Vector3 position, Vector3 view, Vector3 upVector);
  static void positionCamera (double p1, double p2, double p3, double v1, double v2, double v3, double u1, double u2, double u3);
  void checkForMovement ();
  void rotateView (double angle, double x, double y, double z);
  void setViewFromMouse ();
  void moveCamera (double speed);
  void strafeCamera (double speed);
  void walk(double speed);
  void update ();
  static void look();
  
  void increaseSpeed() { _speed *= 2; }
  void decreaseSpeed() { _speed /= 2; }
  
  static void setScreenSize (int width, int height)
  {
    _screenWidth = width;
    _screenHeight = height;
  }
  
  // getter Functions //
  Vector3 getPosition ()
  {
    return _position;
  }
  double getPositionX ()
  {
    return _position.getX ();
  }
  void setPositionX(double t) { _position.setX(t); }
  double getPositionY ()
  {
    return _position.getY ();
  }
  double getPositionZ ()
  {
    return _position.getZ ();
  }
  Vector3 getView ()
  {
    return _view;
  }
  double getViewX ()
  {
    return _view.getX ();
  }
  double getViewY ()
  {
    return _view.getY ();
  }
  double getViewZ ()
  {
    return _view.getZ ();
  }
  Vector3 getUpVector ()
  {
    return _upVector;
  }
  double getUpVectorX ()
  {
    return _upVector.getX ();
  }
  double getUpVectorY ()
  {
    return _upVector.getY ();
  }
  double getUpVectorZ ()
  {
    return _upVector.getZ ();
  }
  Vector3 getStrafe ()
  {
    return _strafe;
  }
  
  void setPositionY(double y) { _position.setY(y); }
  void setViewY(double y) { _view.setY(y); }

  void setFocus(Object *o) { _focus = o; }
  
  static double getCurrentFPS() { return _fps; }
  static double getSpeed() { return _speed; }

 protected:
  void init ();
  void reFocus();
  
  // Camera variables //
  static Vector3 _position; // position of the camera
  static Vector3 _view; // view of the camera
  static Vector3 _upVector; // up vector
  Vector3 _strafe; // strafe vector
  Vector3 _walk;
  
  double _currentRotationX; // hold the rotation value
  
  Object *_focus;

  static double _speed; // the speed at which the camera moves
  static double _fps; // Frames Per Second
  
  static int _screenWidth;
  static int _screenHeight;
};

#endif //_CAMERA_H_

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