TKDEAdapter.h

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// @(#)root/gl:$Id$
// Author:  Timur Pocheptsov  28/07/2009
 
/*************************************************************************
 * Copyright (C) 1995-2009, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#ifndef ROOT_TTKDEAdapter
#define ROOT_TTKDEAdapter
 
#include <vector>
 
#include "TGLIsoMesh.h"
#include "TKDEFGT.h"
 
//KDE adapter is a "data source" adapter for
//Marching cubes alhorithm. It produces scalar
//values in regular grid's nodes, using TKDEFGT class
//to estimate a density.
//IMPORTANT: This class is not intended for end-user's code,
//it's used and _must_ be used only as an argument while
//instantiating mesh builder's class template.
//That's why all members are protected
//or private - end user cannot create object's of this class.
//But mesh builder, derived from this class,
//knows exactly how to use this class correctly.
//SetDimenions and SetE/GetE are public members, it will be derived by mesh
//builder's instantiation and used inside TGL5DPainter class.
 
namespace Rgl {
namespace Fgt {
 
class TKDEAdapter : protected virtual Mc::TGridGeometry<Float_t> {
protected:
   typedef Float_t ElementType_t;
 
   TKDEAdapter();
 
public:
   void SetGeometry(const TGL5DDataSet *dataSet);
 
   void SetE(Double_t e);
   Double_t GetE()const;
 
protected:
   UInt_t GetW()const;
   UInt_t GetH()const;
   UInt_t GetD()const;
 
   void SetDataSource(const TKDEFGT *dataSource);
 
   void FetchDensities()const;
 
   Float_t GetData(UInt_t i, UInt_t j, UInt_t k)const;
 
   void FreeVectors();
private:
   typedef std::vector<Double_t> vector_t;
 
   mutable vector_t  fGrid;       //Grid to estimate density on.
   mutable vector_t  fDensities;  //Estimated densities.
 
   UInt_t    fW;//Number of cells along X.
   UInt_t    fH;//Number of cells along Y.
   UInt_t    fD;//Number of cells along Z.
   UInt_t    fSliceSize;//fW * fH.
 
   //Grid in a unit cube:
   Double_t  fXMin, fXStep;
   Double_t  fYMin, fYStep;
   Double_t  fZMin, fZStep;
 
   const TKDEFGT  *fDE;//Density estimator. This class does not own it.
 
   Double_t  fE;//For KDE.
 
   TKDEAdapter(const TKDEAdapter &rhs);
   TKDEAdapter &operator = (const TKDEAdapter &rhs);
};
 
}
}
 
#endif