#ifndef _SamplingPreprocessor_H__
#define _SamplingPreprocessor_H__

#include <fstream>
using namespace std;

#include "Preprocessor.h"
#include "VssRay.h"

namespace GtpVisibilityPreprocessor {

class Exporter;

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

  virtual bool ComputeVisibility();


protected:
	/** Sets up ray for sampling.
	*/
  void
  SetupRay(Ray &ray, 
		   const Vector3 &point, 
		   const Vector3 &direction,
		   const int type,
		   const Ray::Intersection &source);
  
  
  
  
  /** Verify if the exact visibility for this object was established.
   */
  void
  VerifyVisibility(Intersectable *object);
  

protected:


	int mPass;
	
	ObjectContainer mObjects;

	RayContainer mSampleRays;
	VssRayContainer mVssSampleRays;
};

}

#endif