#ifndef _SamplingPreprocessor_H__
#define _SamplingPreprocessor_H__

#include <fstream>
using namespace std;

#include "Preprocessor.h"

struct SimpleRay {
  Vector3 mOrigin;
  Vector3 mDirection;
};

/** Sampling based visibility preprocessing. The implementation is based on heuristical
    sampling of view space */
class SamplingPreprocessor : public Preprocessor {
public:
	int mPass;

  int mSamplesPerPass;
  int mTotalSamples;
  int mKdPvsDepth;
  ofstream mStats;
  ObjectContainer mObjects;
  RayContainer mSampleRays;
  int mBspConstructionSamples;

	
  SamplingPreprocessor();

  ~SamplingPreprocessor();

  virtual bool ComputeVisibility();

  void
  SetupRay(Ray &ray, 
		   const Vector3 &point, 
		   const Vector3 &direction,
		   const int type);

  KdNode *
  GetNodeForPvs(KdLeaf *leaf);

  int
  AddNodeSamples(Intersectable *object, const Ray &ray);

  void
  HoleSamplingPass();

	int
	CastRay(Intersectable *object, Ray &ray);

	int
	CastEdgeSamples(
									Intersectable *object,
									const Vector3 &point,
									MeshInstance *mi,
									const int samples
									);

	/** Adds objects samples to view cells.
	*/
	int AddObjectSamples(Intersectable *obj, const Ray &ray);

	bool BuildBspTree();
};



#endif