Gabriele Cosmo
218 lines
6.8 KiB
Plaintext
218 lines
6.8 KiB
Plaintext
//
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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: G4PhysicsVector.icc,v 1.17 2008/09/22 08:26:33 gcosmo Exp $
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// GEANT4 tag $Name: geant4-09-02 $
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//
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//
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//---------------------------------------------------------------
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// GEANT 4 class source file
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//
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// G4PhysicsVector.icc
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//
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// Description:
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// A physics vector which has values of energy-loss, cross-section,
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// and other physics values of a particle in matter in a given
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// range of the energy, momentum, etc.
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// This class serves as the base class for a vector having various
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// energy scale, for example like 'log', 'linear', 'free', etc.
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//
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//---------------------------------------------------------------
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inline
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G4double G4PhysicsVector::operator[](const size_t binNumber) const
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{
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return dataVector[binNumber];
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}
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//---------------------------------------------------------------
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inline
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G4double G4PhysicsVector::operator()(const size_t binNumber) const
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{
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return dataVector[binNumber];
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}
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//---------------------------------------------------------------
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inline
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size_t G4PhysicsVector::GetVectorLength() const
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{
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return numberOfBin;
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}
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//---------------------------------------------------------------
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inline
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G4double G4PhysicsVector::LinearInterpolation()
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{
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// Linear interpolation is used to get the value. If the give energy
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// is in the highest bin, no interpolation will be Done. Because
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// there is an extra bin hidden from a user at locBin=numberOfBin,
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// the following interpolation is valid even the current locBin=
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// numberOfBin-1.
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G4double intplFactor = (lastEnergy-binVector[lastBin])
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/ (binVector[lastBin+1]-binVector[lastBin]); // Interpolation factor
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return dataVector[lastBin] +
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( dataVector[lastBin+1]-dataVector[lastBin] ) * intplFactor;
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}
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//---------------------------------------------------------------
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inline
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G4double G4PhysicsVector::SplineInterpolation()
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{
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// Spline interpolation is used to get the value. If the give energy
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// is in the highest bin, no interpolation will be Done. Because
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// there is an extra bin hidden from a user at locBin=numberOfBin,
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// the following interpolation is valid even the current locBin=
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// numberOfBin-1.
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if( !secDerivative ) { FillSecondDerivatives(); }
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// check bin value
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G4double delta = binVector[lastBin+1] - binVector[lastBin];
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G4double a = (binVector[lastBin+1] - lastEnergy)/delta;
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G4double b = (lastEnergy - binVector[lastBin])/delta;
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// Final evaluation of cubic spline polynomial for return
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G4double y1 = dataVector[lastBin];
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G4double y2 = dataVector[lastBin+1];
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G4double res = a*y1 + b*y2 +
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((a*a*a - a)*secDerivative[lastBin] +
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(b*b*b - b)*secDerivative[lastBin+1])*delta*delta/6.0 ;
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return res;
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}
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//---------------------------------------------------------------
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inline
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G4double G4PhysicsVector::GetValue(G4double theEnergy, G4bool&)
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{
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// Use cache for speed up - check if the value 'theEnergy' is same as the
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// last call. If it is same, then use the last bin location. Also the
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// value 'theEnergy' lies between the last energy and low edge of of the
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// bin of last call, then the last bin location is used.
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if( theEnergy == lastEnergy ) {
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} else if(theEnergy < lastEnergy && theEnergy >= binVector[lastBin]) {
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lastEnergy = theEnergy;
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Interpolation();
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} else if( theEnergy <= edgeMin ) {
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lastBin = 0;
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lastEnergy = edgeMin;
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lastValue = dataVector[0];
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} else if(theEnergy < lastEnergy && theEnergy >= binVector[lastBin-1]) {
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lastBin--;
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lastEnergy = theEnergy;
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Interpolation();
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} else if( theEnergy >= edgeMax ){
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lastBin = numberOfBin-1;
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lastEnergy = edgeMax;
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lastValue = dataVector[lastBin];
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} else {
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lastBin = FindBinLocation(theEnergy);
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lastEnergy = theEnergy;
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Interpolation();
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}
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return lastValue;
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}
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//---------------------------------------------------------------
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inline
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void G4PhysicsVector::Interpolation()
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{
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if(useSpline) { lastValue = SplineInterpolation(); }
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else { lastValue = LinearInterpolation(); }
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}
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//---------------------------------------------------------------
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inline
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void G4PhysicsVector::PutValue(size_t binNumber, G4double theValue)
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{
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dataVector[binNumber] = theValue;
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// Fill the bin which is hidden to user with theValue. This is to
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// handle correctly when Energy=theEmax in getValue.
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if(binNumber==numberOfBin-1) { dataVector[binNumber+1] = theValue; }
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}
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//---------------------------------------------------------------
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inline
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G4bool G4PhysicsVector::IsFilledVectorExist() const
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{
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G4bool status=false;
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if(numberOfBin > 0) { status=true; }
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return status;
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}
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//---------------------------------------------------------------
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inline
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void G4PhysicsVector::PutComment(const G4String& theComment)
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{
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comment = theComment;
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}
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//---------------------------------------------------------------
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inline
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const G4String& G4PhysicsVector::GetComment() const
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{
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return comment;
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}
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//---------------------------------------------------------------
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inline
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G4PhysicsVectorType G4PhysicsVector::GetType() const
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{
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return type;
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}
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//---------------------------------------------------------------
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inline
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void G4PhysicsVector::SetSpline(G4bool val)
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{
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useSpline = val;
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}
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