geant4/source/geometry/solids/CSG/include/G4Tubs.icc

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// Implementation of inline methods of G4Tubs
// --------------------------------------------------------------------

inline
G4double G4Tubs::GetInnerRadius () const
{
  return fRMin;
}

inline
G4double G4Tubs::GetOuterRadius () const
{
  return fRMax;
}

inline
G4double G4Tubs::GetZHalfLength () const
{
  return fDz;
}

inline
G4double G4Tubs::GetStartPhiAngle () const
{
  return fSPhi;
}

inline
G4double G4Tubs::GetDeltaPhiAngle () const
{
  return fDPhi;
}

inline
G4double G4Tubs::GetSinStartPhi () const
{
  return sinSPhi;
}

inline
G4double G4Tubs::GetCosStartPhi () const
{
  return cosSPhi;
}

inline
G4double G4Tubs::GetSinEndPhi () const
{
  return sinEPhi;
}

inline
G4double G4Tubs::GetCosEndPhi () const
{
  return cosEPhi;
}

inline
void G4Tubs::Initialize()
{
  fCubicVolume = 0.;
  fSurfaceArea = 0.;
  fInvRmax= 1.0 / fRMax;
  fInvRmin= fRMin > 0. ? 1.0 / fRMin : 0.0;
  fRebuildPolyhedron = true;
}

inline
void G4Tubs::InitializeTrigonometry()
{
  G4double hDPhi = 0.5*fDPhi;                       // half delta phi
  G4double cPhi  = fSPhi + hDPhi;
  G4double ePhi  = fSPhi + fDPhi;

  sinCPhi    = std::sin(cPhi);
  cosCPhi    = std::cos(cPhi);
  cosHDPhi   = std::cos(hDPhi);
  cosHDPhiIT = std::cos(hDPhi - 0.5*kAngTolerance); // inner/outer tol half dphi
  cosHDPhiOT = std::cos(hDPhi + 0.5*kAngTolerance);
  sinSPhi = std::sin(fSPhi);
  cosSPhi = std::cos(fSPhi);
  sinEPhi = std::sin(ePhi);
  cosEPhi = std::cos(ePhi);
}

inline void G4Tubs::CheckSPhiAngle(G4double sPhi)
{
  // Ensure fSphi in 0-2PI or -2PI-0 range if shape crosses 0

  if ( sPhi < 0 )
  {
    fSPhi = CLHEP::twopi - std::fmod(std::fabs(sPhi),CLHEP::twopi);
  }
  else
  {
    fSPhi = std::fmod(sPhi,CLHEP::twopi) ;
  }
  if ( fSPhi+fDPhi > CLHEP::twopi )
  {
    fSPhi -= CLHEP::twopi ;
  }
}

inline void G4Tubs::CheckDPhiAngle(G4double dPhi)
{
  fPhiFullTube = true;
  if ( dPhi >= CLHEP::twopi-kAngTolerance*0.5 )
  {
    fDPhi=CLHEP::twopi;
    fSPhi=0;
  }
  else
  {
    fPhiFullTube = false;
    if ( dPhi > 0 )
    {
      fDPhi = dPhi;
    }
    else
    {
      std::ostringstream message;
      message << "Invalid dphi." << G4endl
              << "Negative or zero delta-Phi (" << dPhi << "), for solid: "
              << GetName();
      G4Exception("G4Tubs::CheckDPhiAngle()", "GeomSolids0002",
                  FatalException, message);
    }
  }
}

inline void G4Tubs::CheckPhiAngles(G4double sPhi, G4double dPhi)
{
  CheckDPhiAngle(dPhi);
  if ( (fDPhi<CLHEP::twopi) && ((sPhi) != 0.0) ) { CheckSPhiAngle(sPhi); }
  InitializeTrigonometry();
}

inline
void G4Tubs::SetInnerRadius (G4double newRMin)
{
  if ( newRMin < 0 ) // Check radii
  {
    std::ostringstream message;
    message << "Invalid radii." << G4endl
            << "Invalid values for radii in solid " << GetName() << G4endl
            << "        newRMin = " << newRMin
            << ", fRMax = " << fRMax << G4endl
            << "        Negative inner radius!";
    G4Exception("G4Tubs::SetInnerRadius()", "GeomSolids0002",
                FatalException, message);
  }
  fRMin= newRMin;
  Initialize();
}

inline
void G4Tubs::SetOuterRadius (G4double newRMax)
{
  if ( newRMax <= 0 ) // Check radii
  {
    std::ostringstream message;
    message << "Invalid radii." << G4endl
            << "Invalid values for radii in solid " << GetName() << G4endl
            << "        fRMin = " << fRMin
            << ", newRMax = " << newRMax << G4endl
            << "        Invalid outer radius!";
    G4Exception("G4Tubs::SetOuterRadius()", "GeomSolids0002",
                FatalException, message);
  }
  fRMax= newRMax;
  Initialize();
}

inline
void G4Tubs::SetZHalfLength (G4double newDz)
{
  if (newDz<=0) // Check z-len
  {
    std::ostringstream message;
    message << "Invalid Z half-length." << G4endl
            << "Negative Z half-length (" << newDz << "), for solid: "
            << GetName();
    G4Exception("G4Tubs::SetZHalfLength()", "GeomSolids0002",
                FatalException, message);
  }
  fDz= newDz;
  Initialize();
}

inline
void G4Tubs::SetStartPhiAngle (G4double newSPhi, G4bool compute)
{
  // Flag 'compute' can be used to explicitely avoid recomputation of
  // trigonometry in case SetDeltaPhiAngle() is invoked afterwards

  CheckSPhiAngle(newSPhi);
  fPhiFullTube = false;
  if (compute)  { InitializeTrigonometry(); }
  Initialize();
}

inline
void G4Tubs::SetDeltaPhiAngle (G4double newDPhi)
{
  CheckPhiAngles(fSPhi, newDPhi);
  Initialize();
}

inline
G4double G4Tubs::FastInverseRxy( const G4ThreeVector& pos,
                                       G4double invRad,
                                       G4double tolerance ) const
{
  G4double rho2 = sqr( pos.x() ) + sqr( pos.y() );
  G4bool onSurface = std::fabs( rho2 * invRad * invRad - 1.0 ) < tolerance;
  G4double invRho = onSurface ? invRad : 1.0 / std::sqrt(rho2);
  return invRho;
}