GPX-Visualizer/camera/Camera.h

#ifndef __CAMERA_H__
#define __CAMERA_H__

/*
Generic camera class by Nghia Ho
*/

class Camera
{
public:
	Camera() { Init(); }
	~Camera(){}

	enum class Target {
		FORWARD,
		POINT,
	};

	void Init();
	void Refresh();
	void SetPos(float x, float y, float z);
    void GetPos(float &x, float &y, float &z);
    void GetDirectionVector(float &x, float &y, float &z);
	void SetYaw(float angle);
	void SetPitch(float angle);

	// NOTE(dev): x,y,z is only set if target is POINT
	void SetTarget(Target target, float x = 0.0f, float y = 0.0f, float z = 0.0f);

	// Navigation
	void Move(float incr);
	void Strafe(float incr);
	void Fly(float incr);
	void RotateYaw(float angle);
	void RotatePitch(float angle);

private:
	float m_x, m_y, m_z; // Position
	float m_lx, m_ly, m_lz; // Direction vector of where we are looking at
	float m_yaw, m_pitch; // Various rotation angles
	float m_strafe_lx, m_strafe_ly; // Always 90 degree to direction vector
	float t_x, t_y, t_z; // when in TARGET mode, look at this x,y,z coordinate

	Target target;
};

#endif