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/// \file persistency/P01/src/ExP01ChamberParameterisation.cc
/// \brief Implementation of the ExP01ChamberParameterisation class
//
//
// $Id: ExP01ChamberParameterisation.cc 82130 2014-06-11 09:26:44Z gcosmo $
//
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#include "ExP01ChamberParameterisation.hh"

#include "G4VPhysicalVolume.hh"
#include "G4ThreeVector.hh"
#include "G4Box.hh"

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ExP01ChamberParameterisation::ExP01ChamberParameterisation(  
        G4int    NoChambers, 
        G4double startZ,          //  Z of center of first 
        G4double spacingZ,        //  Z spacing of centers
        G4double widthChamber, 
        G4double lengthInitial, 
        G4double lengthFinal )
 : G4VPVParameterisation()        
{
   fNoChambers =  NoChambers; 
   fStartZ     =  startZ; 
   fHalfWidth  =  widthChamber*0.5;
   fSpacing    =  spacingZ;
   fHalfLengthFirst = 0.5 * lengthInitial; 
   // fHalfLengthLast = lengthFinal;
   fHalfLengthIncr = 0;
   if( NoChambers > 0 ){
      fHalfLengthIncr =  0.5 * (lengthFinal-lengthInitial)/NoChambers;

      if (spacingZ < widthChamber) {
        G4Exception(
        "ExN02ChamberParameterisation::ExN02ChamberParameterisation()",
                   "InvalidSetup", FatalException,
                   "Width>Spacing");
      }
   }
   
}

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ExP01ChamberParameterisation::~ExP01ChamberParameterisation()
{}

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void ExP01ChamberParameterisation::ComputeTransformation
(const G4int copyNo, G4VPhysicalVolume* physVol) const
{
  G4double      Zposition= fStartZ + (copyNo+1) * fSpacing;
  G4ThreeVector origin(0,0,Zposition);
  physVol->SetTranslation(origin);
  physVol->SetRotation(0);
}

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void ExP01ChamberParameterisation::ComputeDimensions
(G4Box& trackerChamber, const G4int copyNo, const G4VPhysicalVolume*) const
{
  G4double  halfLength= fHalfLengthFirst + copyNo * fHalfLengthIncr;
  trackerChamber.SetXHalfLength(halfLength);
  trackerChamber.SetYHalfLength(halfLength);
  trackerChamber.SetZHalfLength(fHalfWidth);
}

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