Gabriele Cosmo
114 lines
3.7 KiB
C++
114 lines
3.7 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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// $Id: G4Solver.hh,v 1.4 2006/06/29 20:23:59 gunter Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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// Hadronic Process: Nuclear De-excitations
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// by V. Lara
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#ifndef G4Solver_h
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#define G4Solver_h 1
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#include "globals.hh"
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#include <cmath>
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#define DefaultTolerance 5.0e-14
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template <class Function> class G4Solver
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{
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public:
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enum {DefaultMaxIter = 100};
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// default constructor
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G4Solver() : MaxIter(DefaultMaxIter), tolerance(DefaultTolerance),
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a(0.0), b(0.0), root(0.0) {};
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G4Solver(const G4int iterations, const G4double tol) :
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MaxIter(iterations), tolerance(tol),
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a(0.0), b(0.0), root(0.0) {};
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// copy constructor
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G4Solver(const G4Solver & right);
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// destructor
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~G4Solver() {};
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// operators
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G4Solver & operator=(const G4Solver & right);
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G4bool operator==(const G4Solver & right) const;
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G4bool operator!=(const G4Solver & right) const;
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G4int GetMaxIterations(void) const {return MaxIter;}
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void SetMaxIterations(const G4int iterations) {MaxIter=iterations;}
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G4double GetTolerance(void) const {return tolerance;}
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void SetTolerance(const G4double epsilon) {tolerance = epsilon;}
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G4double GetIntervalLowerLimit(void) const {return a;}
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G4double GetIntervalUpperLimit(void) const {return b;}
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void SetIntervalLimits(const G4double Limit1, const G4double Limit2);
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G4double GetRoot(void) const {return root;}
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// Calculates the root by the Bisection method
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G4bool Bisection(Function & theFunction);
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// Calculates the root by the Regula-Falsi method
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G4bool RegulaFalsi(Function & theFunction);
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// Calculates the root by the Brent's method
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G4bool Brent(Function & theFunction);
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// Calculates the root by the Inverse Parabolic Interpolation method
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// due to Jack Crenshaw
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G4bool Crenshaw(Function & theFunction);
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private:
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// Maximum number of iterations
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G4int MaxIter;
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//
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G4double tolerance;
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// interval limits [a,b] which should bracket the root
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G4double a;
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G4double b;
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// The root
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G4double root;
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};
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#include "G4Solver.icc"
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#endif
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