#ifndef _CAMERA_H
#define _CAMERA_H

//----------------------------------------
//一個靈活的攝象機類
//-------------------------------------
class Game;
class Camera
{
public:
	enum CameraType { LANDOBJECT, AIRCRAFT };
	friend Game;

	Camera();
	Camera(CameraType cameraType);
	~Camera();

	void strafe(float units); // left/right
	void fly(float units);    // up/down
	void walk(float units);   // forward/backward
	
	void pitch(float angle); // rotate on right vector
	void yaw(float angle);   // rotate on up vector
	void roll(float angle);  // rotate on look vector

	void saveViewMatrix(); 
	void setViewTransform();
	void setCameraType(CameraType cameraType); 
	void getPosition(D3DXVECTOR3* pos); 
	void setPosition(D3DXVECTOR3* pos); 

	void getRight(D3DXVECTOR3* right);
	void getUp(D3DXVECTOR3* up);
	void getLook(D3DXVECTOR3* look);
private:
	CameraType  _cameraType;
	D3DXVECTOR3 _right;
	D3DXVECTOR3 _up;
	D3DXVECTOR3 _look;
	D3DXVECTOR3 _pos;
	D3DXMATRIX  _view;
};
#endif