#ifndef _VISIBILITYSOLUTIONLOADER_H
#define _VISIBILITYSOLUTIONLOADER_H

#include "common.h"


namespace CHCDemoEngine
{

class ViewCellsTree;
struct ViewCell;
class Bvh;
class BvhNode;

typedef std::vector<ViewCell *> ViewCellsContainer;


/** Loads a preprocessed visibility solution.
*/
class VisibilitySolutionLoader
{
public:

	VisibilitySolutionLoader(): mNumNodes(0) {};

	ViewCellsTree *Load(const std::string &filename, 
		                Bvh *bvh,
						float &totalSamples,
						float &totalTime,
						float viewCellsScaleFactor = 1.0f);


protected:
	/** Creates list of bvh nodes where the index
		is equivalent to the id of this node in the bvh.
	*/
	bool CreateIdSortedList(Bvh *bvh, BvhNodeContainer &nodes);

	bool CreateIdSortedList2(BvhNode *n, BvhNodeContainer &nodes);


	bool LoadPvs(FILE *fw, Bvh *bvh);

	void AllocateLeafViewCells(ViewCellsTree *viewCellsTree);


	///////////////

	int mNumNodes;

	ViewCellsContainer mViewCells;
};

}

#endif