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///////////////////////////////////////////////////////////////////////////////
#include "RE02NestedPhantomParameterisation.hh"

#include "G4VPhysicalVolume.hh"
#include "G4VTouchable.hh"
#include "G4ThreeVector.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4Material.hh"

//=======================================================================
// (RE02NestedPhantomParameterisation)
//
//  (Description)
//     Class for nested parameterisation.
//     This parameterisation handles material and transfomation of voxles.
//
//  T.Aso Created. Nov.2007.
//
////////////////////////////////////////////////////////////////////
RE02NestedPhantomParameterisation::RE02NestedPhantomParameterisation(
						     const G4ThreeVector& voxelSize,
						     G4int nz,
						     std::vector<G4Material*>& mat):
  G4VNestedParameterisation(),fdX(voxelSize.x()),fdY(voxelSize.y()),fdZ(voxelSize.z()),
  fNz(nz),fmat(mat)
{
  // Position of voxels. 
  // x and y positions are already defined in DetectorConstruction 
  // by using replicated volume. Here only we need to define is z positions of voxles.
  fpZ.clear();
  G4double zp;
  for ( G4int iz = 0; iz < fNz; iz++){
    zp = (-fNz+1+2*iz)*fdZ;
    fpZ.push_back(zp);
  }

}

RE02NestedPhantomParameterisation::~RE02NestedPhantomParameterisation(){
  fpZ.clear();
}

//
// Material assignment to geometry.
//
G4Material* RE02NestedPhantomParameterisation::ComputeMaterial(G4VPhysicalVolume* currentVol,
							 const G4int copyNo, 
							 const G4VTouchable* parentTouch)
{
  if(parentTouch==0) return fmat[0]; // protection for initialization and vis at idle state
  // Copy number of voxels. 
  // Copy number of X and Y are obtained from replication number.
  // Copy nymber of Z is the copy number of current voxel.
  G4int ix = parentTouch->GetReplicaNumber(0);
  G4int iy = parentTouch->GetReplicaNumber(1);
  G4int iz = copyNo;
  // For demonstration purpose,a couple of materials are chosen alternately.
  G4Material* mat=0;
  if ( ix%2 == 0 && iy%2 == 0 && iz%2 == 0 ) mat = fmat[0];
  else mat = fmat[1];

  return mat;
}

//
//  Number of Materials
//  Material scanner is required for preparing physics tables and so on before 
//  stating simulation, so that G4 has to know number of materials.
G4int       RE02NestedPhantomParameterisation::GetNumberOfMaterials() const{
  return fmat.size();
}

//
// GetMaterial
//  This is needed for material scanner and realizing geometry.
//
G4Material* RE02NestedPhantomParameterisation::GetMaterial(G4int i) const{
  return fmat[i];
}

//
// Transformation of voxels.
//
void RE02NestedPhantomParameterisation::ComputeTransformation(const G4int copyNo, 
						  G4VPhysicalVolume* physVol)const{
  G4ThreeVector position(0.,0.,fpZ[copyNo]);
  physVol->SetTranslation(position);
}

//
// Dimensions are always same in this RE02 example.
//
void RE02NestedPhantomParameterisation::ComputeDimensions(G4Box& box, 
					       const G4int ,
					       const G4VPhysicalVolume* ) const{
  box.SetXHalfLength(fdX);
  box.SetYHalfLength(fdY);
  box.SetZHalfLength(fdZ);
}