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source: git/classes/DelphesFormula.cc@ 170a11d

Last change on this file since 170a11d was 7e83689, checked in by Roberto Preghenella <preghenella@…>, 5 years ago

Add particle density to formula parameterisations

also adds a new module that computes the particle density
in a eta-phi grid sets the ParticleDensity value of the
candidate, to be used in formula parameterisations.

  • Property mode set to 100644
File size: 2.9 KB
Line 
1/*
2 * Delphes: a framework for fast simulation of a generic collider experiment
3 * Copyright (C) 2012-2014 Universite catholique de Louvain (UCL), Belgium
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19#include "classes/DelphesFormula.h"
20#include "classes/DelphesClasses.h"
21
22#include "TString.h"
23
24#include <stdexcept>
25
26using namespace std;
27
28//------------------------------------------------------------------------------
29
30DelphesFormula::DelphesFormula() :
31 TFormula()
32{
33}
34
35//------------------------------------------------------------------------------
36
37DelphesFormula::DelphesFormula(const char *name, const char *expression) :
38 TFormula()
39{
40}
41
42//------------------------------------------------------------------------------
43
44DelphesFormula::~DelphesFormula()
45{
46}
47
48//------------------------------------------------------------------------------
49
50Int_t DelphesFormula::Compile(const char *expression)
51{
52 TString buffer;
53 const char *it;
54 for(it = expression; *it; ++it)
55 {
56 if(*it == ' ' || *it == '\t' || *it == '\r' || *it == '\n' || *it == '\\') continue;
57 buffer.Append(*it);
58 }
59 buffer.ReplaceAll("pt", "x");
60 buffer.ReplaceAll("eta", "y");
61 buffer.ReplaceAll("phi", "z");
62 buffer.ReplaceAll("energy", "t");
63 buffer.ReplaceAll("d0", "[0]");
64 buffer.ReplaceAll("dz", "[1]");
65 buffer.ReplaceAll("ctgTheta", "[2]");
66 buffer.ReplaceAll("radius", "[3]");
67 buffer.ReplaceAll("density", "[4]");
68
69#if ROOT_VERSION_CODE < ROOT_VERSION(6, 3, 0)
70 TFormula::SetMaxima(100000, 1000, 1000000);
71#endif
72
73 if(TFormula::Compile(buffer) != 0)
74 {
75 throw runtime_error("Invalid formula.");
76 }
77 return 0;
78}
79
80//------------------------------------------------------------------------------
81
82Double_t DelphesFormula::Eval(Double_t pt, Double_t eta, Double_t phi, Double_t energy, Candidate *candidate)
83{
84
85 Double_t d0 = 0., dz = 0., ctgTheta = 0., radius = 0., density = 0.;
86 if (candidate) {
87 d0 = candidate->D0;
88 dz = candidate->DZ;
89 ctgTheta = candidate->CtgTheta;
90 radius = candidate->Position.Pt();
91 density = candidate->ParticleDensity;
92 }
93
94 Double_t x[4] = {pt, eta, phi, energy};
95 Double_t params[5] = {d0, dz, ctgTheta, radius, density};
96 return EvalPar(x, params);
97}
98
99//------------------------------------------------------------------------------
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