field04/src/F04SimpleSolenoid.cc

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0026 //
0027 /// \file field/field04/src/F04SimpleSolenoid.cc
0028 /// \brief Implementation of the F04SimpleSolenoid class
0029 //
0030
0031 #include "F04SimpleSolenoid.hh"
0032
0033 #include "F04GlobalField.hh"
0034
0035 #include "G4GeometryManager.hh"
0036 #include "globals.hh"
0037
0038 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0039
0040 F04SimpleSolenoid::F04SimpleSolenoid(G4double Bz, G4double fz, G4LogicalVolume* lv, G4ThreeVector c)
0041   : F04ElementField(c, lv),
0042     fBfield(Bz),
0043     fFringeZ(fz),
0044     fFieldLength(2. * ((G4Tubs*)fVolume->GetSolid())->GetZHalfLength() + fFringeZ),
0045     fFieldRadius(((G4Tubs*)fVolume->GetSolid())->GetOuterRadius())
0046 {}
0047
0048 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0049
0050 void F04SimpleSolenoid::AddFieldValue(const G4double point[4], G4double field[6]) const
0051 {
0052   G4ThreeVector global(point[0], point[1], point[2]);
0053   G4ThreeVector local;
0054
0055   local = fGlobal2local.TransformPoint(global);
0056
0057   if (IsOutside(local)) return;
0058
0059   G4ThreeVector B(0.0, 0.0, fBfield);
0060
0061   B = fGlobal2local.Inverse().TransformAxis(B);
0062
0063   field[0] += B[0];
0064   field[1] += B[1];
0065   field[2] += B[2];
0066 }
0067
0068 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0069
0070 G4bool F04SimpleSolenoid::IsOutside(G4ThreeVector& local) const
0071 {
0072   //  EInside inside = tubs->Inside(local);
0073   //  return (inside == kOutside);
0074   G4double r = std::sqrt(local.x() * local.x() + local.y() * local.y());
0075   return (r > fFieldRadius || std::fabs(local.z()) > fFieldLength / 2.0);
0076 }
0077
0078 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0079
0080 G4bool F04SimpleSolenoid::IsWithin(G4ThreeVector& local) const
0081 {
0082   //  EInside inside = tubs->Inside(local);
0083   //  return (inside == kInside);
0084   G4double r = std::sqrt(local.x() * local.x() + local.y() * local.y());
0085   return (r < fFieldRadius && std::fabs(local.z()) < fFieldLength / 2.0);
0086 }