Gabriele Cosmo
127 lines
4.0 KiB
C++
127 lines
4.0 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// G4LEPTSElossDistr
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//
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// Author: Pedro Arce (CIEMAT), 2014
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// --------------------------------------------------------------------
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#include "G4LEPTSElossDistr.hh"
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#include "G4LEPTSDistribution.hh"
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#include <stdio.h>
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#include <iostream>
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G4LEPTSElossDistr::G4LEPTSElossDistr(const G4String& fname)
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{
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fileName = fname;
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ReadFile();
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}
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void G4LEPTSElossDistr::ReadFile()
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{
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theNDistributions = 0;
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FILE * fp;
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if ((fp=fopen(fileName.c_str(), "r"))==nullptr)
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{
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NoBins = 0;
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bFileFound = false;
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return;
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}
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bFileFound = true;
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G4int nEnergies;
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G4int nAngles;
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G4int nData;
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(void) fscanf(fp,"%i \n",&nEnergies);
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for( G4int ie = 0; ie < nEnergies; ++ie )
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{
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G4float energySep;
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(void) fscanf(fp,"%f \n",&energySep);
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(void) fscanf(fp,"%i \n",&nAngles);
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for( G4int ia = 0; ia < nAngles; ++ia )
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{
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G4float angleSep;
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(void) fscanf(fp,"%f \n",&angleSep);
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auto dist = new G4LEPTSDistribution();
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++theNDistributions;
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std::map<G4double, G4LEPTSDistribution *> angleDist;
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angleDist[angleSep] = dist;
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theDistributions[energySep] = std::move(angleDist);
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(void) fscanf(fp,"%i \n",&nData);
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if( dist->ReadFile( fp, nData ) )
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{
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std::ostringstream message;
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message << "End of file found while reading file: "
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<< fileName;
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G4Exception("G4LEPTSElossDistr::ReadFile()", "ReadError",
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FatalException, message);
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}
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}
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}
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fclose(fp);
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}
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G4double G4LEPTSElossDistr::Sample( G4double eMin, G4double eMax )
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{
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// Sample Energy from Cumulative distr. G4interval [eMin, eMax]
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if( eMin > eMax) return 0.0;
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// Get the distribution to do the sampling
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G4LEPTSDistribution* distr = nullptr;
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if( theNDistributions == 1 )
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{
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distr = (*( (*(theDistributions.cbegin())).second ).cbegin()).second;
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}
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else
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{
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for( auto itedd = theDistributions.cbegin(); itedd != theDistributions.cend(); ++itedd ){
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G4double energySep = (*itedd).first;
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if( eMax < energySep )
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{
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const auto& dist1 = (*itedd).second;
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for( auto ited = dist1.cbegin(); ited != dist1.cend(); ++ited )
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{
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G4double angleSep = (*ited).first;
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if( 1 < angleSep )
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{
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distr = (*ited).second;
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break;
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}
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}
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break;
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}
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}
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}
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return (nullptr != distr) ? distr->Sample(eMin, eMax) : 0.0;
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}
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