Gabriele Cosmo
120 lines
5.0 KiB
C++
120 lines
5.0 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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// G4ExtendedPhysicsVector
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//
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// Class description:
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//
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// A data scructure which includes G4PhysicsVector and also data on
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// partial x-sections
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//
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// Author: V.Ivanchenko 09.09.2025
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//
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// --------------------------------------------------------------------
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#ifndef G4ExtendedPhysicsVector_hh
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#define G4ExtendedPhysicsVector_hh 1
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#include <vector>
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#include "globals.hh"
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#include "G4PhysicsVector.hh"
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class G4ExtendedPhysicsVector
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{
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public:
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explicit G4ExtendedPhysicsVector(G4PhysicsVector*, G4int nxsec = 0);
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virtual ~G4ExtendedPhysicsVector();
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// Copy constructor and assignment operator
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G4ExtendedPhysicsVector(const G4ExtendedPhysicsVector&) = default;
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G4ExtendedPhysicsVector& operator=(const G4ExtendedPhysicsVector&) = default;
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// not used operators
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G4ExtendedPhysicsVector(const G4ExtendedPhysicsVector&&) = delete;
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G4ExtendedPhysicsVector& operator=(const G4ExtendedPhysicsVector&&) = delete;
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G4bool operator==(const G4ExtendedPhysicsVector& right) const = delete;
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// get G4PhysicsVector with total cross section
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inline const G4PhysicsVector* GetPhysicsVector() const;
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// Get the value from the total x-section using interpolation defined
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// in the G4PhysicsVector object. Consumer code gets changed
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// index and may reuse it for the next call to save CPU for bin location.
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inline G4double Value(const G4double energy, std::size_t& lastidx) const;
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// Get the cross-section/energy-loss value corresponding to the
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// given energy using log-log interpolation. Consumer code gets changed
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// index and may reuse it for the next call to save CPU for bin location.
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// Spline is not used in this method.
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G4double LogLogValue(const G4double energy, std::size_t& lastidx) const;
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// This method may be applied only once.
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// Force length of data using std::vector::resize() with the
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// the default value 0; partial cross section vector is resized
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// only if the number of partial x-sections is above zero.
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void SetDataLength(G4int dlength);
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// Filled partial cross sections by energy index (0 <= idx < numberOfNodes)
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// It is assumed that the array y does not have negative values.
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void PutPartialXSData(const std::size_t idx, const G4double* y);
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// Sample partial reaction channel for given energy, rand - uniform
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// random number, lastidx is the cache allowing to reduce CPU for energy
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// bin location. Data are stored as float but computations are in double.
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G4int SampleReactionChannel(const G4double energy, const G4double rand,
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std::size_t& lastidx) const;
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// randomly select partial cross section using Log-Log interpolation
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G4int SampleReactionChannelLogLog(const G4double energy, const G4double rand,
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std::size_t& lastidx) const;
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// Print data
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void DumpValues(G4double unitE = 1.0, G4double unitV = 1.0) const;
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private:
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G4int verboseLevel = 0;
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G4int nPartialXS = 0;
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std::size_t idxmax = 0;
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std::size_t numberOfNodes = 0;
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// The partial cumulative x-sections normalized to the sum
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std::vector<std::vector<G4float>* >* dataPartialXS = nullptr;
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G4PhysicsVector* totalData = nullptr;
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};
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inline const G4PhysicsVector* G4ExtendedPhysicsVector::GetPhysicsVector() const
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{
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return totalData;
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}
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inline G4double G4ExtendedPhysicsVector::Value(const G4double e, std::size_t& idx) const
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{
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return totalData->Value(e, idx);
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}
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#endif
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