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RooGenContext.h
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1/*****************************************************************************
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 *****************************************************************************/
16#ifndef ROO_GEN_CONTEXT
17#define ROO_GEN_CONTEXT
18
19#include "RooAbsGenContext.h"
20#include "RooArgSet.h"
21
22class RooAbsPdf;
23class RooDataSet;
24class RooRealIntegral;
25class RooAcceptReject;
26class TRandom;
27class RooRealVar ;
29
31public:
32 RooGenContext(const RooAbsPdf &model, const RooArgSet &vars, const RooDataSet *prototype= nullptr,
33 const RooArgSet* auxProto=nullptr, bool verbose=false, const RooArgSet* forceDirect=nullptr);
34 ~RooGenContext() override;
35
36 void printMultiline(std::ostream &os, Int_t content, bool verbose=false, TString indent="") const override ;
37
38 void attach(const RooArgSet& params) override ;
39
40protected:
41
42 void initGenerator(const RooArgSet &theEvent) override;
43 void generateEvent(RooArgSet &theEvent, Int_t remaining) override;
44
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 _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 Int_t _updateFMaxPerEvent ; ///< If true, maximum p.d.f value needs to be recalculated for each event
54
55 ClassDefOverride(RooGenContext,0) // Universal context for generating toy MC data from any p.d.f
56};
57
58#endif
#define ClassDefOverride(name, id)
Definition: Rtypes.h:339
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:56
RooDataSet is a container class to hold unbinned data.
Definition: RooDataSet.h:55
Class RooGenContext implement a universal generator context for all RooAbsPdf classes that do not hav...
Definition: RooGenContext.h:30
void printMultiline(std::ostream &os, Int_t content, bool verbose=false, TString indent="") const override
Printing interface.
void generateEvent(RooArgSet &theEvent, Int_t remaining) override
Generate one event.
RooArgSet _otherVars
List of observables generated internally, randomly, and by accept/reject sampling.
Definition: RooGenContext.h:47
Int_t _code
Internal generation code.
Definition: RooGenContext.h:48
RooArgSet _uniformVars
Definition: RooGenContext.h:47
void initGenerator(const RooArgSet &theEvent) override
Perform one-time initialization of the generator context.
~RooGenContext() override
Destructor.
RooArgSet _directVars
Definition: RooGenContext.h:47
RooAbsPdf * _pdfClone
Clone of input p.d.f.
Definition: RooGenContext.h:46
RooArgSet _cloneSet
Clone of all nodes of input p.d.f.
Definition: RooGenContext.h:45
Int_t _updateFMaxPerEvent
If true, maximum p.d.f value needs to be recalculated for each event.
Definition: RooGenContext.h:53
double _norm
Maximum probability, p.d.f area and normalization.
Definition: RooGenContext.h:49
RooRealIntegral * _acceptRejectFunc
Projection function to be passed to accept/reject sampler.
Definition: RooGenContext.h:50
void attach(const RooArgSet &params) override
Attach the cloned model to the event buffer we will be filling.
RooAbsNumGenerator * _generator
MC sampling generation engine.
Definition: RooGenContext.h:51
RooRealVar * _maxVar
Variable holding maximum value of p.d.f.
Definition: RooGenContext.h:52
RooGenContext(const RooAbsPdf &model, const RooArgSet &vars, const RooDataSet *prototype=nullptr, const RooArgSet *auxProto=nullptr, bool verbose=false, const RooArgSet *forceDirect=nullptr)
Initialize a new context for generating events with the specified variables, using the specified PDF ...
RooRealIntegral performs hybrid numerical/analytical integrals of RooAbsReal objects.
RooRealVar represents a variable that can be changed from the outside.
Definition: RooRealVar.h:40
This is the base class for the ROOT Random number generators.
Definition: TRandom.h:27
Basic string class.
Definition: TString.h:136