class Camera{
  private:
	Point3 eye;
	Vector3 u,v,n;
	double viewAngle, aspect, nearDist, farDist; // view volume shape
	void setModelviewMatrix(); // tell OpenGL where the camera is

  public:
	Camera(); // default constructor
	void set(Point3 eye, Point3 look, Vector3 up); // like gluLookAt()
	void roll(float angle); // roll it
	void pitch(float angle); // increase pitch
	void yaw(float angle); // yaw it
	void slide(float delU, float delV, float delN); // slide it
	void setShape(float vAng, float asp, float nearD, float farD);
};