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Geant4/examples/basic/B2/B2b/src/ChamberParameterisation.cc

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 26 //
 27 /// \file B2/B2b/src/ChamberParameterisation.cc
 28 /// \brief Implementation of the B2b::ChamberParameterisation class
 29 
 30 #include "ChamberParameterisation.hh"
 31 
 32 #include "G4SystemOfUnits.hh"
 33 #include "G4ThreeVector.hh"
 34 #include "G4Tubs.hh"
 35 #include "G4VPhysicalVolume.hh"
 36 
 37 namespace B2b
 38 {
 39 
 40 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 41 
 42 ChamberParameterisation::ChamberParameterisation(G4int noChambers,
 43                                                  G4double startZ,  //  Z of center of first
 44                                                  G4double spacingZ,  //  Z spacing of centers
 45                                                  G4double widthChamber, G4double lengthInitial,
 46                                                  G4double lengthFinal)
 47 {
 48   fNoChambers = noChambers;
 49   fStartZ = startZ;
 50   fHalfWidth = 0.5 * widthChamber;
 51   fSpacing = spacingZ;
 52   fRmaxFirst = 0.5 * lengthInitial;
 53   if (noChambers > 0) {
 54     fRmaxIncr = 0.5 * (lengthFinal - lengthInitial) / (noChambers - 1);
 55     if (spacingZ < widthChamber) {
 56       G4Exception("ChamberParameterisation::ChamberParameterisation()", "InvalidSetup",
 57                   FatalException, "Width>Spacing");
 58     }
 59   }
 60 }
 61 
 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 63 
 64 void ChamberParameterisation::ComputeTransformation(const G4int copyNo,
 65                                                     G4VPhysicalVolume* physVol) const
 66 {
 67   // Note: copyNo will start with zero!
 68   G4double Zposition = fStartZ + copyNo * fSpacing;
 69   G4ThreeVector origin(0, 0, Zposition);
 70   physVol->SetTranslation(origin);
 71   physVol->SetRotation(nullptr);
 72 }
 73 
 74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 75 
 76 void ChamberParameterisation::ComputeDimensions(G4Tubs& trackerChamber, const G4int copyNo,
 77                                                 const G4VPhysicalVolume*) const
 78 {
 79   // Note: copyNo will start with zero!
 80   G4double rmax = fRmaxFirst + copyNo * fRmaxIncr;
 81   trackerChamber.SetInnerRadius(0);
 82   trackerChamber.SetOuterRadius(rmax);
 83   trackerChamber.SetZHalfLength(fHalfWidth);
 84   trackerChamber.SetStartPhiAngle(0. * deg);
 85   trackerChamber.SetDeltaPhiAngle(360. * deg);
 86 }
 87 
 88 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 89 
 90 }  // namespace B2b
 91