Gabriele Cosmo
80 lines
3.5 KiB
C++
80 lines
3.5 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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//
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//
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/// \file ODESolver.hh
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/// \brief Definition of the ODESolver class
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#ifndef ODESolver_h
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#define ODESolver_h 1
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#include <vector>
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#include <map>
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#include <functional>
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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using myODEs = std::vector<double>(*)(double ,std::vector<double>) ;
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std::vector<double> operator*(const std::vector<double> v, double alfa);
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std::vector<double> operator+(const std::vector<double> v, double alfa);
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std::vector<double> operator+(const std::vector<double> v1, const std::vector<double> v2);
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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class ODESolver
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{
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public:
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ODESolver();
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~ODESolver() = default;
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void Embedded_RungeKutta_Fehlberg(
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std::function<std::vector<double>(double,std::vector<double>)>, std::vector<double> &y,
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double start,double end,double stepsize=-1, double epsilon = 1e-3,
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std::vector<double> *time_observer=nullptr,std::vector<std::vector<double>> *state_observer=nullptr);
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void SetNstepsForObserver(unsigned int ndt) {fNstepsForObserver = ndt;}
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void RungeKutta4(
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std::function<std::vector<double>(double,std::vector<double>)>, std::vector<double> &y,
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double start,double end,double stepsize=-1,
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std::vector<double> *time_observer=nullptr,std::vector<std::vector<double>> *state_observer=nullptr);
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private:
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double RungeKutta_Fehlberg(std::function<std::vector<double>(double,std::vector<double>)>,
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std::vector<double> &y,double t, double stepsize=-1);
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void absValuesVector(std::vector<double> &vIn);
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unsigned int fNstepsForObserver{1};
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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inline void ODESolver::absValuesVector(std::vector<double> &vIn)
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{
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for (double &val : vIn) {
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if (val < 0) val *= -1.;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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#endif |