#ifndef _IntelRayCaster_H__
#define _IntelRayCaster_H__

#include "RayCaster.h"
#include <vector>


namespace GtpVisibilityPreprocessor {


class Intersectable;
class VssRay;
class KdTree;
class Ray;
class SimpleRayContainer;
class AxisAlignedBox3;
class Vector3;
struct VssRayContainer;
class Preprocessor;
struct SimpleRay;


/** This class provides an interface for ray casting.
*/
class IntelRayCaster: public RayCaster
{
public:
	/** Default constructor initialising e.g., KD tree and BSP tree.
	*/
	IntelRayCaster(const Preprocessor &preprocessor,
				   const std::string externKdTree);

	virtual ~IntelRayCaster();

	int Type() const 
	{ 
		return INTEL_RAYCASTER; 
	}

        // Using packet of 4 rays supposing that these are coherent
        // We give a box to which each ray is clipped to before the
        // ray shooting is computed !
  virtual void CastRaysPacket4(const Vector3 &minBox,
							   const Vector3 &maxBox,
							   const Vector3 origin4[],
							   const Vector3 direction4[],
							   int result4[],
							   float dist4[]);
  
	virtual int CastRay(const SimpleRay &simpleRay,
						VssRayContainer &vssRays,
						const AxisAlignedBox3 &box,
						const bool castDoubleRay,
						const bool pruneInvalidRays = true);

	virtual void CastRays16(
							SimpleRayContainer &rays, 
							VssRayContainer &vssRays,
							const AxisAlignedBox3 &sbox,
							const bool castDoubleRay,
							const bool pruneInvalidRays = true);

  	virtual void CastRays16(
							SimpleRayContainer &rays, 
							const int offset,
							VssRayContainer &vssRays,
							const AxisAlignedBox3 &sbox,
							const bool castDoubleRay,
							const bool pruneInvalidRays = true);

  
  void
  CastSimpleForwardRays(
						SimpleRayContainer &rays,
						const AxisAlignedBox3 &sbox
						);

    virtual void CastRays(
						  SimpleRayContainer &rays,
						  VssRayContainer &vssRays,
						  const AxisAlignedBox3 &sbox,
						  const bool castDoubleRay,
						  const bool pruneInvalidRays = true);

protected:

	bool InitRayCast(const std::string externKdTree);
};


}

#endif