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// $Id: G4Tubs.icc,v 1.14 2009/06/09 16:08:23 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// --------------------------------------------------------------------
// GEANT 4 inline definitions file
//
// G4Tubs.icc
//
// 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 
void G4Tubs::Initialize()
{
  fCubicVolume = 0.;
  fSurfaceArea = 0.;
  fpPolyhedron = 0;
}

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

inline void G4Tubs::CheckDPhiAngle(G4double dPhi)
{
  fPhiFullTube = true;
  if ( dPhi >= twopi-kAngTolerance*0.5 )
  {
    fDPhi=twopi;
    fSPhi=0;
  }
  else
  {
    fPhiFullTube = false;
    if ( dPhi > 0 )
    {
      fDPhi = dPhi;
    }
    else
    {
      G4cerr << "ERROR - G4Tubs()::CheckDPhiAngle()" << G4endl
             << "        Negative or zero delta-Phi (" << dPhi << ") in solid: "
             << GetName() << G4endl;
      G4Exception("G4Tubs::CheckDPhiAngle()", "InvalidSetup",
                  FatalException, "Invalid dphi.");
    }
  }
}

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

inline
void G4Tubs::SetInnerRadius (G4double newRMin)
{
  fRMin= newRMin;
  Initialize();
}

inline
void G4Tubs::SetOuterRadius (G4double newRMax)
{
  fRMax= newRMax;
  Initialize();
}

inline
void G4Tubs::SetZHalfLength (G4double newDz)
{
  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();
}

//  Older names for access functions

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

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

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

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

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

inline
G4double G4Tubs::GetCubicVolume()
{
  if(fCubicVolume != 0.) {;}
  else   { fCubicVolume = fDPhi*fDz*(fRMax*fRMax-fRMin*fRMin); }
  return fCubicVolume;
}

inline
G4double G4Tubs::GetSurfaceArea()
{
  if(fSurfaceArea != 0.) {;}
  else
  {
    fSurfaceArea = fDPhi*(fRMin+fRMax)*(2*fDz+fRMax-fRMin);
    if (!fPhiFullTube)
    {
      fSurfaceArea = fSurfaceArea + 4*fDz*(fRMax-fRMin);
    }
  }
  return fSurfaceArea;
}