/*]  Copyright (c) 2009-2010, Charles McGarvey  [**************************
**]  All rights reserved.
*
* vi:ts=4 sw=4 tw=75
*
* 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_FRUSTUM_HH_
#define _MOOF_FRUSTUM_HH_

/**
 * \file frustum.hh
 * All things related to frustums!
 */
	
#include <moof/math.hh>
#include <moof/plane.hh>


namespace moof {


template <int D> class aabb;
template <int D> class sphere;


/**
 * A six-sided volume for representing the space visible by a position
 * looking outward.
 */
class frustum
{
public:

	enum collision
	{
		outside			= 0,
		inside			= 1,
		intersecting	= 2
	};

	frustum() {}
	frustum(const matrix4& modelview, const matrix4& projection)
	{
		init(modelview, projection);
	}
	frustum(const matrix4& modelview, scalar fovy, scalar aspect,
			scalar abutting, scalar distant)
	{
		init(modelview, fovy, aspect, abutting, distant);
	}

	void init(const matrix4& modelview, const matrix4& projection);
	void init(const matrix4& modelview, scalar fovy, scalar aspect,
			  scalar abutting, scalar distant);

	collision contains(const aabb<3>& aabb) const;
	collision contains(const sphere<3>& sphere) const;


private:

	plane planes_[6]; // left, right, bottom, top, near, far
};


} // namespace moof

#endif // _MOOF_FRUSTUM_HH_