G4PhysicsLinearVector.cc

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// $Id$
//
// 
//--------------------------------------------------------------------
//      GEANT 4 class implementation file
//
//  G4PhysicsLinearVector.cc
//
//  15 Feb 1996 - K.Amako : 1st version
//  19 Jun 2009 - V.Ivanchenko : removed hidden bin 
//
//--------------------------------------------------------------------

#include "G4PhysicsLinearVector.hh"

G4PhysicsLinearVector::G4PhysicsLinearVector()
  : G4PhysicsVector()
{
  type = T_G4PhysicsLinearVector;
}

G4PhysicsLinearVector::G4PhysicsLinearVector(size_t theNbin)
  : G4PhysicsVector()
{
  type = T_G4PhysicsLinearVector;

  numberOfNodes = theNbin + 1;
  dataVector.reserve(numberOfNodes);
  binVector.reserve(numberOfNodes);      

  for (size_t i=0; i<numberOfNodes; i++)
  {
     binVector.push_back(0.0);
     dataVector.push_back(0.0);
  }
}  

G4PhysicsLinearVector::G4PhysicsLinearVector(G4double theEmin, 
                                             G4double theEmax, size_t theNbin)
  : G4PhysicsVector()
{
  type = T_G4PhysicsLinearVector;

  dBin    = (theEmax-theEmin)/theNbin;
  baseBin = theEmin/dBin;

  numberOfNodes = theNbin + 1;
  dataVector.reserve(numberOfNodes);
  binVector.reserve(numberOfNodes);      

  binVector.push_back(theEmin);
  dataVector.push_back(0.0);

  for (size_t i=1; i<numberOfNodes-1; i++)
    {
      binVector.push_back( theEmin + i*dBin );
      dataVector.push_back(0.0);
    }
  binVector.push_back(theEmax);
  dataVector.push_back(0.0);

  edgeMin = binVector[0];
  edgeMax = binVector[numberOfNodes-1];

}  

G4PhysicsLinearVector::~G4PhysicsLinearVector(){}

G4bool G4PhysicsLinearVector::Retrieve(std::ifstream& fIn, G4bool ascii)
{
  G4bool success = G4PhysicsVector::Retrieve(fIn, ascii);
  if (success)
  {
    G4double theEmin = binVector[0];
    dBin = binVector[1]-theEmin;
    baseBin = theEmin/dBin;
  }
  return success;
}

void G4PhysicsLinearVector::ScaleVector(G4double factorE, G4double factorV)
{
  G4PhysicsVector::ScaleVector(factorE, factorV);
  G4double theEmin = binVector[0];
  dBin = binVector[1]-theEmin;
  baseBin = theEmin/dBin;
}


size_t G4PhysicsLinearVector::FindBinLocation(G4double theEnergy) const
{
  // For G4PhysicsLinearVector, FindBinLocation is implemented using
  // a simple arithmetic calculation.
  //
  // Because this is a virtual function, it is accessed through a
  // pointer to the G4PhyiscsVector object for most usages. In this
  // case, 'inline' will not be invoked. However, there is a possibility 
  // that the user access to the G4PhysicsLinearVector object directly and 
  // not through pointers or references. In this case, the 'inline' will
  // be invoked. (See R.B.Murray, "C++ Strategies and Tactics", Chap.6.6)

  return size_t( theEnergy/dBin - baseBin ); 
}