G4PhysicsFreeVector.cc

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// $Id$
//
// 
//--------------------------------------------------------------------
//      GEANT 4 class implementation file
//
//  G4PhysicsFreeVector.cc
//
//  History:
//    02 Dec. 1995, G.Cosmo : Structure created based on object model
//    06 June 1996, K.Amako : The 1st version of implemented
//    01 Jul. 1996, K.Amako : Cache mechanism and hidden bin from the 
//                            user introduced
//    26 Sep. 1996, K.Amako : Constructor with only 'bin size' added
//    11 Nov. 2000, H.Kurashige : use STL vector for dataVector and binVector
//    19 Jun. 2009, V.Ivanchenko : removed hidden bin 
//
//--------------------------------------------------------------------
 
#include "G4PhysicsFreeVector.hh"
 
 
G4PhysicsFreeVector::G4PhysicsFreeVector() 
  : G4PhysicsVector()
{
  type = T_G4PhysicsFreeVector;
}
 
G4PhysicsFreeVector::G4PhysicsFreeVector(size_t theNbin)
  : G4PhysicsVector()
{
  type = T_G4PhysicsFreeVector;
  numberOfNodes = theNbin;
 
  dataVector.reserve(numberOfNodes);
  binVector.reserve(numberOfNodes);
 
  for (size_t i=0; i<numberOfNodes; i++)
  {
     binVector.push_back(0.0);
     dataVector.push_back(0.0);
  }
}  
 
G4PhysicsFreeVector::G4PhysicsFreeVector(const G4DataVector& theBinVector, 
                                         const G4DataVector& theDataVector)
{
  type = T_G4PhysicsFreeVector;
  numberOfNodes = theBinVector.size();
 
  dataVector.reserve(numberOfNodes);
  binVector.reserve(numberOfNodes);
 
  for (size_t i=0; i<numberOfNodes; i++)
  {
     binVector.push_back(theBinVector[i]);
     dataVector.push_back(theDataVector[i]);
  }
 
  edgeMin = binVector[0];
  edgeMax = binVector[numberOfNodes-1];
}  
 
G4PhysicsFreeVector::~G4PhysicsFreeVector()
{
}
 
void G4PhysicsFreeVector::PutValue( size_t theBinNumber, 
                    G4double theBinValue, 
                                    G4double theDataValue )
{
  binVector[theBinNumber]  = theBinValue;
  dataVector[theBinNumber] = theDataValue;
 
  if( theBinNumber == numberOfNodes-1 )
  {
     edgeMax = binVector[numberOfNodes-1];
  }
 
  if( theBinNumber == 0 )
  {
     edgeMin = binVector[0];
  }
}
 
size_t G4PhysicsFreeVector::FindBinLocation(G4double theEnergy) const
{
  // For G4PhysicsFreeVector, FindBinLocation is implemented using
  // the binary search algorithm.
  //
  // Because this is a virtual function, it is accessed through a
  // pointer to the G4PhysicsVector object for most usages. In this
  // case, 'inline' will not be invoked. However, there is a possibility 
  // that the user access to the G4PhysicsFreeVector 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)
 
  size_t lowerBound = 0;
  size_t upperBound = numberOfNodes-2;
 
  while (lowerBound <= upperBound)
  {
    size_t midBin = (lowerBound + upperBound)/2;
    if( theEnergy < binVector[midBin] )
       { upperBound = midBin-1; }
    else
       { lowerBound = midBin+1; }
  }
 
  return upperBound;
}