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/// \file ExP01ChamberParameterisation.cc
/// \brief Implementation of the ExP01ChamberParameterisation class

#include "ExP01ChamberParameterisation.hh"

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