#ifndef _RayCaster_H__
#define _RayCaster_H__

#include "Containers.h"
#include <string>
using namespace std;


namespace GtpVisibilityPreprocessor {


class Intersectable;
class VssRay;
class SimpleRayContainer;
class AxisAlignedBox3;
class Vector3;
struct VssRayContainer;
class Preprocessor;

/** This class provides an interface for ray casting.
*/
class RayCaster
{
public:
	
	enum {
	  INTERNAL_RAYCASTER = 0,
	  INTEL_RAYCASTER
	};

	RayCaster(const Preprocessor &preprocessor);

	virtual ~RayCaster();

	virtual int Type() const = 0;

	/** Wrapper for casting single ray.
	*/
	VssRay *CastSingleRay(
		const Vector3 &viewPoint,
		const Vector3 &direction,
		const float probability,
        const AxisAlignedBox3 &box
		);

	virtual int CastRay(
		const Vector3 &viewPoint,
		const Vector3 &direction,
		const float probability,
        VssRayContainer &vssRays,
		const AxisAlignedBox3 &box,
		const bool castDoubleRay
		) = 0;

	 virtual void CastRays16(
		 const int i,
		 SimpleRayContainer &rays, 
		 VssRayContainer &vssRays,
		 const AxisAlignedBox3 &sbox,
		 const bool castDoubleRay
		 ) = 0;
	

protected:

	int ProcessRay(
			 const Vector3 &viewPoint,
			 const Vector3 &direction,
			 Intersectable *objectA,
			 Vector3 &pointA,
			 const Vector3 &normalA,
			 Intersectable *objectB,
			 Vector3 &pointB,
			 const Vector3 &normalB,
			 const float probability,
			 VssRayContainer &vssRays,
			 const AxisAlignedBox3 &box
			 );

	
  	const Preprocessor &mPreprocessor;
};


}

#endif