source: GTP/trunk/Lib/Vis/Preprocessing/src/SamplingPreprocessor.h @ 1221

#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);
  
  /** Refined sampling for finding "holes", i.e., difficult visibility.
   */
  void
  HoleSamplingPass();
  
  
  Intersectable *
  CastRay(
                  const Vector3 &origin,
                  const Vector3 &direction
                  );
  
  /** Verify if the exact visibility for this object was established.
   */
  void
  VerifyVisibility(Intersectable *object);
  

protected:


        int mPass;
        int mSamplesPerPass;
        int mTotalSamples;
        
        ofstream mStats;
        ObjectContainer mObjects;

        RayContainer mSampleRays;
        VssRayContainer mVssSampleRays;
};

}

#endif