source: GTP/trunk/Lib/Vis/Preprocessing/src/RssPreprocessor.h @ 2176

#ifndef _RssPreprocessor_H__
#define _RssPreprocessor_H__

#include <fstream>
//

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

namespace GtpVisibilityPreprocessor {


class RssTree;
class RssTreeLeaf;

  
/** Sampling based visibility preprocessing. The implementation is 
        based on heuristical sampling of view space 
*/
class RssPreprocessor : public Preprocessor {
  
public:
  vector<SamplingStrategy *> mDistributions;
  MixtureDistribution *mMixtureDistribution;
  int mSamplesPerPass;
  int mRssSamplesPerPass;
  int mInitialSamples;
  int mRssSamples;
  bool mUseImportanceSampling;
  bool mUseRssTree;

  bool mExportPvs;
  bool mExportRssTree;

  bool mUseViewcells;
  bool mUpdateSubdivision;

  bool mObjectBasedSampling;
  bool mDirectionalSampling;
  
  //AxisAlignedBox3 *mViewSpaceBox;

  
  RssTree *mRssTree;

  // rays cast during the processing
  VssRayContainer mVssRays;
        
   /// if initial samples should be loaded from file
  bool mLoadInitialSamples;
  /// if initial samples should be stored in file
  bool mStoreInitialSamples;

  RssPreprocessor();
  ~RssPreprocessor();

  virtual bool ComputeVisibility();

#if 0 // matt:: moved up into preprocessor
  int
  CastRay(
                  Vector3 &viewPoint,
                  Vector3 &direction,
                  const float probability,
                  VssRayContainer &vssRays
                  );
#endif          
  virtual bool BuildBspTree() { return false; }
  



  void
  ExportObjectRays(VssRayContainer &rays,
                                   const int objectId);
        
  int
  GenerateImportanceRays(RssTree *vssTree,
                                                 const int desiredSamples,
                                                 SimpleRayContainer &rays
                                                 );


  bool
  ExportRssTreeLeaf(char *filename,
                                        RssTree *tree,
                                        RssTreeLeaf *leaf);

  void
  ExportRssTreeLeaves(RssTree *tree, const int number);
        

  bool
  ExportRssTree(char *filename,
                                RssTree *tree,
                                const Vector3 &dir
                                );


  float
  GetAvgPvsSize(RssTree *tree,
                                const vector<AxisAlignedBox3> &viewcells
                                );
  

  void
  ExportPvs(char *filename,
                        RssTree *rssTree
                        );



  /** Redefininition of the get sample rays method from the preprocessor */
  int
  GenerateRays(const int number,
                           SamplingStrategy &strategy,
                           SimpleRayContainer &rays);
  
};


};

#endif