Gabriele Cosmo
225 lines
7.5 KiB
C++
225 lines
7.5 KiB
C++
// This code implementation is the intellectual property of
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// the RD44 GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4PhysicsVector.hh,v 2.1 1998/07/12 02:58:57 urbi Exp $
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// GEANT4 tag $Name: geant4-00 $
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//
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//
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//---------------------------------------------------------------
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// GEANT 4 class header file
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//
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// G4PhysicsVector.hh
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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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// History:
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// 02 Dec. 1995, G.Cosmo : Structure created based on object model
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// 03 Mar. 1996, K.Amako : Implemented the 1st version
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// 27 Apr. 1996, K.Amako : Cache mechanism added
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// 01 Jul. 1996, K.Amako : Now GetValue not virtual.
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// 21 Sep. 1996, K.Amako : Added [] and () operators.
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//
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//---------------------------------------------------------------
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#ifndef G4PhysicsVector_h
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#define G4PhysicsVector_h 1
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#include "globals.hh"
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#include "G4DataVector.hh"
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#include <rw/tpordvec.h>
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class G4PhysicsVector
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{
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public:
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// Constructor and destructor
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G4PhysicsVector(){};
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virtual ~G4PhysicsVector(){};
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// Public functions
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G4double GetValue(G4double theEnergy, G4bool& isOutRange);
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// Get the crosssection/energy-loss value corresponding to the
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// given energy. An appropriate interpolation is used to calculate
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// the value.
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// [Note] isOutRange is not used anymore. This argument is kept
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// for the compatibility reason.
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// Public operators
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G4int operator==(const G4PhysicsVector &right) const ;
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G4int operator!=(const G4PhysicsVector &right) const ;
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G4double operator[](const size_t binNumber) const ;
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// Returns simply the value in the bin specified by 'binNumber'
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// of the dataVector. The boundary check will be Done. If you
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// don't want this check, use the operator ().
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G4double operator()(const size_t binNumber) const ;
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// Returns simply the value in the bin specified by 'binNumber'
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// of the dataVector. The boundary check will not be Done. If
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// you want this check, use the operator [].
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// Public functions
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void PutValue(size_t binNumber, G4double theValue);
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// Put 'theValue' into the bin specified by 'binNumber'.
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// Take note that the 'binNumber' starts from '0'.
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// To fill the vector, you have beforehand to Construct a vector
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// by the constructor with Emin, Emax, Nbin. 'theValue' should
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// be the crosssection/energyloss value corresponding to the low
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// edge energy of the bin specified by 'binNumber'. You can get
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// the low edge energy value of a bin by GetLowEdgeEnergy().
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virtual G4double GetLowEdgeEnergy(size_t binNumber) const;
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// Get the energy value at the low edge of the specified bin.
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// Take note that the 'binNumber' starts from '0'.
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// This value is defined when a physics vector is constructed
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// by a constructor of a derived class. Use this function
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// when you fill physis vector by PutValue().
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size_t GetVectorLength() const;
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// Get the toal length (bin number) of the vector.
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G4bool IsFilledVectorExist() const;
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// Is non-empty physics vector already exist?
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void LinkPhysicsTable(RWTPtrOrderedVector<G4PhysicsVector>& theTable);
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// Link the given G4PhysicsTable to the current G4PhyiscsVector.
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G4bool IsLinkedTableExist() const;
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// Has this physics vector an extended physics table?
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const RWTPtrOrderedVector<G4PhysicsVector>* GetNextTable() const;
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// Returns the pointer to a physics table created for elements
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// or isotopes (when the cross-sesctions or energy-losses
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// depend explicitly on them).
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void PutComment(const G4String& theComment);
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// Put a comment to the G4PhysicsVector. This may help to check
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// whether your are accessing to the one you want.
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G4String GetComment() const;
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// Retrieve the comment of the G4PhysicsVector.
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protected:
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G4double edgeMin; // Lower edge value of the lowest bin
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G4double edgeMax; // Lower edge value of the highest bin
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size_t numberOfBin;
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G4double lastEnergy; // Cache the last input value
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G4double lastValue; // Cache the last output value
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size_t lastBin; // Cache the last bin location
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G4DataVector dataVector; // Vector to keep the crossection/energyloss
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G4DataVector binVector; // Vector to keep the low edge value of bin
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RWTPtrOrderedVector<G4PhysicsVector>* ptrNextTable;
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// Link to the connected physics table
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G4double LinearInterpolation(G4double theEnergy, size_t theLocBin);
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// Linear interpolation function
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virtual size_t FindBinLocation(G4double theEnergy) const=0;
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// Find the bin# in which theEnergy belongs - pure virtual function
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private:
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G4String comment;
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};
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inline 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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inline 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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inline const RWTPtrOrderedVector<G4PhysicsVector>*
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G4PhysicsVector::GetNextTable() const
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{
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return ptrNextTable;
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}
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inline G4double G4PhysicsVector::LinearInterpolation(G4double theEnergy,
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size_t theLocBin) {
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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 = (theEnergy-binVector(theLocBin))
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/ (binVector(theLocBin+1)-binVector(theLocBin)); // Interpolation factor
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return dataVector(theLocBin) +
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( dataVector(theLocBin+1)-dataVector(theLocBin) ) * intplFactor;
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}
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inline G4double G4PhysicsVector::GetValue(G4double theEnergy,
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G4bool& isOutRange) {
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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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isOutRange = false; // No range check.
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size_t locBin;
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if( theEnergy == lastEnergy ) {
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return lastValue;
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}
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else if( (theEnergy < lastEnergy) &&
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(theEnergy >= binVector(lastBin)) ) {
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locBin = lastBin;
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lastEnergy = theEnergy;
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lastValue = LinearInterpolation(theEnergy, locBin);
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return lastValue;
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}
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else if( theEnergy < edgeMin ){
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lastBin = 0;
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lastEnergy = theEnergy;
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lastValue = dataVector(0);
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return lastValue;
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}
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else if( theEnergy >= edgeMax ){
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lastBin = numberOfBin-1;
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lastEnergy = theEnergy;
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lastValue = dataVector( numberOfBin-1 );
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return lastValue;
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}
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else {
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locBin = FindBinLocation(theEnergy);
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lastBin = locBin;
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lastEnergy = theEnergy;
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lastValue = LinearInterpolation(theEnergy, locBin);
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return lastValue;
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}
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}
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#endif
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