camera.h

这是一个台球游戏的源代码

class CCamera
{
public:
	double m_x, m_y, m_z;	// Camera position

	double m_up[3];
	double m_lookat[3];		// Lookat point
	double m_VectorPosToLook[3];
	double m_r;				// Distance from camera to look-at point
	double m_alpha;			//视角
	double m_theta, m_phi;		// Camera angle

public:
	CCamera(void);
	void SetParameters(double x0, double y0, double z0, double theta0, double phi0);

	void get_lookat_from_pos(void);	
	void get_pos_from_lookat(void);	

	bool pos_valid(void);

	void step_forward(double step);
	void step_backward(double step);
	void step_left(double step);
	void step_right(double step);
	void step_up(double step);
	void step_down(double step);

	void rotate_left_right(double a);
	void look_up_down(double a);

	bool AlphaAdd();
	bool AlphaDec();
	void UpdateVector();
};