/*]  Copyright (c) 2009-2011, Charles McGarvey  [*****************************
**]  All rights reserved.
*
* Distributable under the terms and conditions of the 2-clause BSD license;
* see the file COPYING for a complete text of the license.
*
*****************************************************************************/

#ifndef _MOOF_CAMERA_HH_
#define _MOOF_CAMERA_HH_

#include <moof/event.hh>
#include <moof/frustum.hh>
#include <moof/math.hh>
#include <moof/rigid_body.hh>


/**
 * \file camera.hh
 * Classes related to managing the modelview and perspective matrices.
 */

namespace moof {


class camera : public rigid_body3
{
public:

	camera()
	{
		state_.init();
		prev_state_.init();

		quaternion_rotation_world_y(state_.orientation, SCALAR(0.0));
	}

	void position(const vector3& position);
	void rotation(const quaternion& rotation);

	void look_at(const vector3& point);

	void projection(const matrix4& projection);
	void projection(scalar fovy, scalar aspect, scalar near, scalar far);

	const matrix4& modelview() const
	{
		return modelview_;
	}

	const matrix4& projection() const
	{
		return projection_;
	}

	const class frustum& frustum() const
	{
		return frustum_;
	}

	void upload_to_gl(scalar alpha = 0) const;

	void update(scalar t, scalar dt);
	void draw(scalar alpha = 0) const;
	void handle_event(const event& event);

private:

	void calculate(scalar alpha) const;

	mutable matrix4 	modelview_;
	matrix4			projection_;
	mutable class frustum	frustum_;
};


} // namespace moof

#endif // _MOOF_CAMERA_HH_