#ifndef _ViewCell_H__
#define _ViewCell_H__

#include "Mesh.h"
#include "Containers.h"
#include "Ray.h"

//namespace GtpVisibilityPreprocessor {
  
class BspInterior;
class BspPvs;
struct Triangle3;

/**
	View cell with an optional mesh representation
*/
class ViewCell: public MeshInstance
{
public:
	ViewCell();
	/** Constructor taking a mesh representing the shape of	the viewcell.
	*/
	ViewCell(Mesh *mesh);
	/** Returns PvS. 
	*/
	ViewCellPvs &GetPvs();

	int Type() const;

	/** Derives viewcells from object container.
		@param objects the intersectables the viewcells are derived from
		@param viewCells the viewcells are returned in this container
		@param maxViewCells the maximum number of viewcells created. if 0 => unbounded
	*/
	static void DeriveViewCells(const ObjectContainer &objects, 
								ViewCellContainer &viewCells, 
								const int maxViewCells);

	/** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
		@param the base triangle
		@param the height of the newly created view cell
	*/
	static ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height);

	void AddPassingRay(const Ray &ray, const int contributions);	

	static bool ParseEnvironment();


protected:

	/// the potentially visible objects
	ViewCellPvs mPvs;

	/** Ray set description of the rays passing through this node */
	PassingRaySet mPassingRays;
};

//}; // GtpVisibilityPreprocessor

#endif