TGo4FitModelFunction.h

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// $Id: TGo4FitModelFunction.h 478 2009-10-29 12:26:09Z linev $
//-----------------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//         Experiment Data Processing at EE department, GSI
//-----------------------------------------------------------------------
// Copyright (C) 2000- GSI Helmholtzzentrum für Schwerionenforschung GmbH
//                     Planckstr. 1, 64291 Darmstadt, Germany
// Contact:            http://go4.gsi.de
//-----------------------------------------------------------------------
// This software can be used under the license agreements as stated
// in Go4License.txt file which is part of the distribution.
//-----------------------------------------------------------------------

#ifndef TGO4FITMODELFUNCTION_H
#define TGO4FITMODELFUNCTION_H

#include "TGo4FitModel.h"

typedef Double_t (*TUserFunction)(Double_t*, Double_t*);

class TGo4FitModelFunction : public TGo4FitModel {
   public:

      TGo4FitModelFunction();

      TGo4FitModelFunction(const char* iName, TUserFunction iUserFunction, Int_t iNPars, Bool_t AddAmplitude = kFALSE);

      TGo4FitModelFunction(const char* iName, const char* iLibraryName = "libName.so", const char* iFunctionName = "Funcname", Int_t iNPars = 0, Bool_t AddAmplitude = kFALSE);

      virtual ~TGo4FitModelFunction();

      virtual Bool_t CanAmplTouch() { return kTRUE; }

      void SetUserFunction(TUserFunction iUserFunction);

      void SetUserFunction(const char* iLibraryName, const char* iFunctionName);

      const char* GetLibraryName() { return fxLibraryName.Data(); }

      void SetLibraryName(const char* name) { fxLibraryName = name; }

      const char* GetFunctionName() { return fxFunctionName.Data(); }

      void SetFunctionName(const char* name) { fxFunctionName = name; }

      Int_t GetNumberOfFuncPar();

      Bool_t SetNumberOfFuncPar(Int_t num);

      void SetPosParIndex(Int_t naxis, Int_t indx = -1);
      void SetWidthParIndex(Int_t naxis, Int_t indx = -1);

      virtual Bool_t BeforeEval(Int_t ndim);
      virtual void AfterEval();

      virtual void Print(Option_t* option) const;

   protected:

      virtual Bool_t Initialize(Int_t UseBuffers = -1);

      virtual void Finalize();

      virtual TString GetFuncParName(Int_t n);
      TGo4FitParameter* GetFuncPar(Int_t n);

      virtual Int_t GetPosParIndex(Int_t naxis);
      virtual Int_t GetWidthParIndex(Int_t naxis);

      virtual Double_t UserFunction(Double_t* Coordinates, Double_t* Parameters);

      Bool_t LoadLibrary(Bool_t CloseFirst);
      void CloseLibrary();

      TString fxLibraryName;

      TString fxFunctionName;

      TArrayI fxPosIndex;

      TArrayI fxWidthIndex;

   private:

      TUserFunction fxUserFunction;             

      void* fxLibrary;                          

   ClassDef(TGo4FitModelFunction,1)
};
#endif // TGO4FITMODELFUNCTION_H

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