Gabriele Cosmo
107 lines
3.2 KiB
Plaintext
107 lines
3.2 KiB
Plaintext
// This code implementation is the intellectual property of
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// the 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.icc,v 1.1 1999/11/16 17:40:46 gcosmo Exp $
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// GEANT4 tag $Name: geant4-01-01 $
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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 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 G4RWTPtrOrderedVector<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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