source: trunk/VUT/GtpVisibilityPreprocessor/src/VssPreprocessor.h @ 439

#ifndef _VssPreprocessor_H__
#define _VssPreprocessor_H__

#include <fstream>
using namespace std;

#include "Preprocessor.h"
#include "VssRay.h"
class VssTree;
class VssTreeLeaf;

/** Sampling based visibility preprocessing. The implementation is based on heuristical
    sampling of view space */
class VssPreprocessor : public Preprocessor {
public:
  int mPass;
  int mSamplesPerPass;
  int mVssSamplesPerPass;
  int mInitialSamples;
  int mVssSamples;
  bool mUseImportanceSampling;

  AxisAlignedBox3 *mViewSpaceBox;

  ofstream mStats;
        
  ObjectContainer mObjects;

  // rays cast during the processing
  VssRayContainer mVssRays;
        
  VssPreprocessor();
  ~VssPreprocessor();

  virtual bool ComputeVisibility();

  Vector3
  GetViewpoint(AxisAlignedBox3 *viewSpaceBox);

  Vector3
  GetDirection(const Vector3 &viewpoint,
                           AxisAlignedBox3 *viewSpaceBox
                           );
        
  void
  SetupRay(Ray &ray, 
                   const Vector3 &point, 
                   const Vector3 &direction
                   );


        
  int
  CastRay(
                  Vector3 &viewPoint,
                  Vector3 &direction,
                  VssRayContainer &vssRays

                  );


  bool
  ExportRays(const char *filename,
                         const VssRayContainer &vssRays,
                         const int number
                         );

  int
  GenerateImportanceRays(VssTree *vssTree,
                                                 const int desiredSamples,
                                                 SimpleRayContainer &rays
                                                 );


  bool
  ExportVssTreeLeaf(char *filename,
                                        VssTree *tree,
                                        VssTreeLeaf *leaf);

  void
  ExportVssTreeLeaves(VssTree *tree, const int number);
        

  bool
  ExportVssTree(char *filename,
                                VssTree *tree,
                                const Vector3 &dir
                                );


  float
  GetAvgPvsSize(VssTree *tree,
                                const vector<AxisAlignedBox3> &viewcells
                                );
  
  void CastRay(const BspTree &tree, const VssRay & vssRay);
        
  int AddObjectSamples(Intersectable *obj, const Ray &ray);
};



#endif