/****************************************************************************
Copyright (c) 2010,RadonLabs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

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****************************************************************************/
#ifndef __intersection_H__
#define __intersection_H__
#include "math/ray.h"
#include "math/sphere_.h"
#include "math/bbox.h"
#include "math/plane.h"
#include "math/frustum.h"


namespace Math
{
	class Intersection
	{
	public:
		// Returns true if intersected
		// if intersected, fOut returns the first intersection point of the ray 
		static bool Intersect( const Ray& ray, const float3& v0, const float3& v1, const float3& v2, scalar& fOut, scalar fTolerance = N_TINY );

		//// Return true if the ray1 intersect ray2
		//// if intersected, fOut1 returns the intersection point of the ray1 
		//// if intersected, fOut2 returns the intersection point of the ray2 
		static bool Intersect( const Ray& ray1, const Ray& ray2, scalar& fOut1, scalar& fOut2, scalar fTolerance = N_TINY );

		//// return true if the ray intersect line segment
		//// if intersect, fOut returns the intersection point of the ray
		static bool Intersect( const Ray& ray, const float3& lineBegin, const float3& lineEnd,scalar& fOut, scalar fTolerance = N_TINY );

		//// return ture if the ray Intersect the point.
		static bool Intersect( const Ray& ray, const float3& p, scalar fTolerance = N_TINY);

		// Returns true if the ray stats inside the box or in front of the sphere
		// if intersect, fOut1 is the first intersection;fOut2 is the second intersection
		static bool Intersect(const Ray& ray, const bbox& box, scalar& fOut1, scalar& fOut2);

		// return true if the sphere 0 intersect sphere 1
		static bool Intersect(const sphere& s0, const sphere& s1 );

		static bool Intersect(const bbox& box, const sphere& sph);

		static bool Intersect(const sphere& sph, const frustum& fru);

		static bool Intersect(const sphere& sph, const plane* p, const int planeCount);

	};

}





#endif // __intersection_H__