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2 * Project: RooFit *
3 * Package: RooFitCore *
4 * File: $Id: RooGenContext.h,v 1.19 2007/05/11 09:11:30 verkerke Exp $
5 * Authors: *
6 * WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu *
7 * DK, David Kirkby, UC Irvine, dkirkby@uci.edu *
8 * *
9 * Copyright (c) 2000-2005, Regents of the University of California *
10 * and Stanford University. All rights reserved. *
11 * *
12 * Redistribution and use in source and binary forms, *
13 * with or without modification, are permitted according to the terms *
14 * listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
15 *****************************************************************************/
19#include "RooAbsGenContext.h"
20#include "RooArgSet.h"
22class RooAbsPdf;
23class RooDataSet;
24class RooRealIntegral;
25class RooAcceptReject;
26class TRandom;
27class RooRealVar ;
32 RooGenContext(const RooAbsPdf &model, const RooArgSet &vars, const RooDataSet *prototype= 0,
33 const RooArgSet* auxProto=0, Bool_t verbose=kFALSE, const RooArgSet* forceDirect=0);
34 virtual ~RooGenContext();
36 virtual void printMultiline(std::ostream &os, Int_t content, Bool_t verbose=kFALSE, TString indent="") const ;
38 virtual void attach(const RooArgSet& params) ;
42 virtual void initGenerator(const RooArgSet &theEvent);
43 virtual void generateEvent(RooArgSet &theEvent, Int_t remaining);
45 RooArgSet *_cloneSet; // Clone of all nodes of input p.d.f
46 RooAbsPdf *_pdfClone; // Clone of input p.d.f
47 RooArgSet _directVars,_uniformVars,_otherVars; // List of observables generated internally, randomly, and by accept/reject sampling
48 Int_t _code; // Internal generation code
49 Double_t _maxProb{0.}, _area{0.}, _norm{0.}; // Maximum probability, p.d.f area and normalization
50 RooRealIntegral *_acceptRejectFunc; // Projection function to be passed to accept/reject sampler
51 RooAbsNumGenerator *_generator; // MC sampling generation engine
52 RooRealVar *_maxVar ; // Variable holding maximum value of p.d.f
53 TIterator *_uniIter ; // Iterator over uniform observables
54 Int_t _updateFMaxPerEvent ; // If true, maximum p.d.f value needs to be recalculated for each event
56 ClassDef(RooGenContext,0) // Universal context for generating toy MC data from any p.d.f
const Bool_t kFALSE
Definition RtypesCore.h:92
double Double_t
Definition RtypesCore.h:59
#define ClassDef(name, id)
Definition Rtypes.h:325
static void indent(ostringstream &buf, int indent_level)
RooAbsGenContext is the abstract base class for generator contexts of RooAbsPdf objects.
Class RooAbsNumGenerator is the abstract base class for MC event generator implementations like RooAc...
Class RooAcceptReject is a generic toy monte carlo generator implement the accept/reject sampling tec...
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition RooArgSet.h:29
RooDataSet is a container class to hold unbinned data.
Definition RooDataSet.h:33
Class RooGenContext implement a universal generator context for all RooAbsPdf classes that do not hav...
RooArgSet _otherVars
virtual void attach(const RooArgSet &params)
Attach the cloned model to the event buffer we will be filling.
RooArgSet * _cloneSet
virtual void printMultiline(std::ostream &os, Int_t content, Bool_t verbose=kFALSE, TString indent="") const
Printing interface.
RooArgSet _uniformVars
RooArgSet _directVars
virtual void generateEvent(RooArgSet &theEvent, Int_t remaining)
Generate one event.
TIterator * _uniIter
virtual ~RooGenContext()
RooAbsPdf * _pdfClone
Int_t _updateFMaxPerEvent
RooRealIntegral * _acceptRejectFunc
Double_t _maxProb
RooAbsNumGenerator * _generator
RooRealVar * _maxVar
virtual void initGenerator(const RooArgSet &theEvent)
Perform one-time initialization of the generator context.
RooRealIntegral performs hybrid numerical/analytical integrals of RooAbsReal objects.
RooRealVar represents a variable that can be changed from the outside.
Definition RooRealVar.h:39
Iterator abstract base class.
Definition TIterator.h:30
This is the base class for the ROOT Random number generators.
Definition TRandom.h:27
Basic string class.
Definition TString.h:136