| Geant4 Cross Reference |
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 // G4LEPTSElossDistr
27 //
28 // Author: Pedro Arce (CIEMAT), 2014
29 // --------------------------------------------------------------------
30
31 #include "G4LEPTSElossDistr.hh"
32 #include "G4LEPTSDistribution.hh"
33
34 #include <stdio.h>
35 #include <iostream>
36
37 G4LEPTSElossDistr::G4LEPTSElossDistr(const G4String& fname)
38 {
39 fileName = fname;
40 ReadFile();
41 }
42
43 void G4LEPTSElossDistr::ReadFile()
44 {
45 theNDistributions = 0;
46
47 FILE * fp;
48
49 if ((fp=fopen(fileName.c_str(), "r"))==nullptr)
50 {
51 NoBins = 0;
52 bFileFound = false;
53 return;
54 }
55
56 bFileFound = true;
57
58 G4int nEnergies;
59 G4int nAngles;
60 G4int nData;
61 (void) fscanf(fp,"%i \n",&nEnergies);
62 for( G4int ie = 0; ie < nEnergies; ++ie )
63 {
64 G4float energySep;
65 (void) fscanf(fp,"%f \n",&energySep);
66 (void) fscanf(fp,"%i \n",&nAngles);
67 for( G4int ia = 0; ia < nAngles; ++ia )
68 {
69 G4float angleSep;
70 (void) fscanf(fp,"%f \n",&angleSep);
71 auto dist = new G4LEPTSDistribution();
72 ++theNDistributions;
73 std::map<G4double, G4LEPTSDistribution *> angleDist;
74 angleDist[angleSep] = dist;
75 theDistributions[energySep] = std::move(angleDist);
76
77 (void) fscanf(fp,"%i \n",&nData);
78 if( dist->ReadFile( fp, nData ) )
79 {
80 std::ostringstream message;
81 message << "End of file found while reading file: "
82 << fileName;
83 G4Exception("G4LEPTSElossDistr::ReadFile()", "ReadError",
84 FatalException, message);
85 }
86 }
87 }
88
89 fclose(fp);
90 }
91
92 G4double G4LEPTSElossDistr::Sample( G4double eMin, G4double eMax )
93 {
94 // Sample Energy from Cumulative distr. G4interval [eMin, eMax]
95
96 if( eMin > eMax) return 0.0;
97
98 // Get the distribution to do the sampling
99 G4LEPTSDistribution* distr = nullptr;
100 if( theNDistributions == 1 )
101 {
102 distr = (*( (*(theDistributions.cbegin())).second ).cbegin()).second;
103 }
104 else
105 {
106 for( auto itedd = theDistributions.cbegin(); itedd != theDistributions.cend(); ++itedd ){
107 G4double energySep = (*itedd).first;
108 if( eMax < energySep )
109 {
110 const auto& dist1 = (*itedd).second;
111 for( auto ited = dist1.cbegin(); ited != dist1.cend(); ++ited )
112 {
113 G4double angleSep = (*ited).first;
114 if( 1 < angleSep )
115 {
116 distr = (*ited).second;
117 break;
118 }
119 }
120 break;
121 }
122 }
123 }
124
125 return (nullptr != distr) ? distr->Sample(eMin, eMax) : 0.0;
126 }
127