Implementation of the JGenerator interface. More...

#include <JMarkovGenerator.hh>

Inheritance diagram for JMARKOV::J3DhistGenerator:

Public Member Functions
	J3DhistGenerator (TH3 *_h)
	Constructor. More...

	~J3DhistGenerator ()

JPosition3D	getPosition ()
	Return a randomly generated position. More...

double	getWeight (JPosition3D pos)
	return the weight (=probability density dP/dV) for the given position. More...

Public Attributes
TH3 *	h

Detailed Description

Implementation of the JGenerator interface.

Generates positions uniformly by sampling from a histogram that represents the x,y,z distribution

Definition at line 672 of file JMarkovGenerator.hh.

Constructor & Destructor Documentation

◆ J3DhistGenerator()

JMARKOV::J3DhistGenerator::J3DhistGenerator ( TH3 * _h )

inline

Constructor.

The histogram is cloned and automatically normalized.

Note: empty bins should always be avoided!

Definition at line 681 of file JMarkovGenerator.hh.

                                 {
       // copy histogram
       h = (TH3*) _h->Clone( _h->GetName() ) ;
       // normalize histogram
       h->Scale( 1.0/h->Integral("width") ) ;
     }

◆ ~J3DhistGenerator()

JMARKOV::J3DhistGenerator::~J3DhistGenerator ( )

inline

Definition at line 688 of file JMarkovGenerator.hh.

                         {
       delete h ;
     }

Member Function Documentation

◆ getPosition()

JPosition3D JMARKOV::J3DhistGenerator::getPosition ( )

inlinevirtual

Return a randomly generated position.

Implements JMARKOV::JGenerator.

Definition at line 692 of file JMarkovGenerator.hh.

                               {
       double x, y, z ;
       h->GetRandom3(x,y,z) ;
       return JPosition3D(x,y,z) ;
     }

◆ getWeight()

double JMARKOV::J3DhistGenerator::getWeight ( JPosition3D pos )

inlinevirtual

return the weight (=probability density dP/dV) for the given position.

When the generator is properly normalized, the integral of this quantity over the whole space is 1.

Implements JMARKOV::JGenerator.

Definition at line 698 of file JMarkovGenerator.hh.

                                         {
       // return 0 outside histogram range
       if( pos.getX()<h->GetXaxis()->GetXmin() || pos.getX()>=h->GetXaxis()->GetXmax() ) return 0.0 ;
       if( pos.getY()<h->GetYaxis()->GetXmin() || pos.getY()>=h->GetYaxis()->GetXmax() ) return 0.0 ;
       if( pos.getZ()<h->GetZaxis()->GetXmin() || pos.getZ()>=h->GetZaxis()->GetXmax() ) return 0.0 ;
       // return weight
       Int_t bin = h->FindBin( pos.getX(), pos.getY(), pos.getZ() ) ;
       return h->GetBinContent(bin) ;
     }

Member Data Documentation

◆ h

TH3* JMARKOV::J3DhistGenerator::h

Definition at line 708 of file JMarkovGenerator.hh.

The documentation for this class was generated from the following file:

JMarkovGenerator.hh

Public Member Functions

Public Attributes