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//
// Implementation of inline methods of G4Sphere
// --------------------------------------------------------------------

inline
G4double G4Sphere::GetInnerRadius() const
{
  return fRmin;
}

inline
G4double G4Sphere::GetOuterRadius() const
{
  return fRmax;
}

inline
G4double G4Sphere::GetStartPhiAngle() const
{
  return fSPhi;
}

inline
G4double G4Sphere::GetDeltaPhiAngle() const
{
  return fDPhi;
}

inline
G4double G4Sphere::GetStartThetaAngle() const
{
  return fSTheta;
}

G4double G4Sphere::GetDeltaThetaAngle() const
{
  return fDTheta;
}

inline
G4double G4Sphere::GetSinStartPhi () const
{
  return sinSPhi;
}

inline
G4double G4Sphere::GetCosStartPhi () const
{
  return cosSPhi;
}

inline
G4double G4Sphere::GetSinEndPhi () const
{
  return sinEPhi;
}

inline
G4double G4Sphere::GetCosEndPhi () const
{
  return cosEPhi;
}

inline
G4double G4Sphere::GetSinStartTheta () const
{
  return sinSTheta;
}

inline
G4double G4Sphere::GetCosStartTheta () const
{
  return cosSTheta;
}

inline
G4double G4Sphere::GetSinEndTheta () const
{
  return sinETheta;
}

inline
G4double G4Sphere::GetCosEndTheta () const
{
  return cosETheta;
}

inline
void G4Sphere::Initialize()
{
  fCubicVolume = 0.;
  fSurfaceArea = 0.;
  fRebuildPolyhedron = true;
}

inline
void G4Sphere::InitializePhiTrigonometry()
{
  hDPhi = 0.5*fDPhi;                       // half delta phi
  cPhi  = fSPhi + hDPhi;
  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 G4Sphere::InitializeThetaTrigonometry()
{
  eTheta  = fSTheta + fDTheta;

  sinSTheta = std::sin(fSTheta);
  cosSTheta = std::cos(fSTheta);
  sinETheta = std::sin(eTheta);
  cosETheta = std::cos(eTheta);

  tanSTheta  = sinSTheta/cosSTheta;
  tanSTheta2 = tanSTheta*tanSTheta;
  tanETheta  = sinETheta/cosETheta;
  tanETheta2 = tanETheta*tanETheta;
}

inline
void G4Sphere::CheckThetaAngles(G4double sTheta, G4double dTheta)
{
  if ( (sTheta<0) || (sTheta>CLHEP::pi) )
  {
    std::ostringstream message;
    message << "sTheta outside 0-PI range." << G4endl
            << "Invalid starting Theta angle for solid: " << GetName();
    G4Exception("G4Sphere::CheckThetaAngles()", "GeomSolids0002",
                FatalException, message);
  }
  else
  {
    fSTheta=sTheta;
  }
  if ( dTheta+sTheta >= CLHEP::pi )
  {
    fDTheta=CLHEP::pi-sTheta;
  }
  else if ( dTheta > 0 )
  {
    fDTheta=dTheta;
  }
  else
  {
    std::ostringstream message;
    message << "Invalid dTheta." << G4endl
            << "Negative delta-Theta (" << dTheta << "), for solid: "
            << GetName();
    G4Exception("G4Sphere::CheckThetaAngles()", "GeomSolids0002",
                FatalException, message);
  }
  fFullThetaSphere = fDTheta-fSTheta >= CLHEP::pi;
  fFullSphere = fFullPhiSphere && fFullThetaSphere;

  InitializeThetaTrigonometry();
}

inline
void G4Sphere::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 G4Sphere::CheckDPhiAngle(G4double dPhi)
{
  fFullPhiSphere = true;
  if ( dPhi >= CLHEP::twopi-kAngTolerance*0.5 )
  {
    fDPhi=CLHEP::twopi;
  }
  else
  {
    fFullPhiSphere = false;
    if ( dPhi > 0 )
    {
      fDPhi = dPhi;
    }
    else
    {
      std::ostringstream message;
      message << "Invalid dphi." << G4endl
              << "Negative delta-Phi (" << dPhi << "), for solid: "
              << GetName();
      G4Exception("G4Sphere::CheckDPhiAngle()", "GeomSolids0002",
                  FatalException, message);
    }
  }
}

inline
void G4Sphere::CheckPhiAngles(G4double sPhi, G4double dPhi)
{
  CheckDPhiAngle(dPhi);
  if (!fFullPhiSphere && (sPhi != 0.0)) { CheckSPhiAngle(sPhi); }
  fFullSphere = fFullPhiSphere && fFullThetaSphere;

  InitializePhiTrigonometry();
}

inline
void G4Sphere::SetInnerRadius(G4double newRmin)
{
  fRmin= newRmin;
  fRminTolerance = (fRmin) != 0.0 ? std::max( kRadTolerance, fEpsilon*fRmin ) : 0;
  Initialize();
}

inline
void G4Sphere::SetOuterRadius(G4double newRmax)
{
  fRmax= newRmax;
  fRmaxTolerance = std::max( kRadTolerance, fEpsilon*fRmax );
  Initialize();
}

inline
void G4Sphere::SetStartPhiAngle(G4double newSPhi, G4bool compute)
{
  // Flag 'compute' can be used to explicitely avoid recomputation of
  // trigonometry in case SetDeltaPhiAngle() is invoked afterwards

  CheckSPhiAngle(newSPhi);
  fFullPhiSphere = false;
  if (compute)  { InitializePhiTrigonometry(); }
  Initialize();
}

inline
void G4Sphere::SetDeltaPhiAngle(G4double newDPhi)
{
  CheckPhiAngles(fSPhi, newDPhi);
  Initialize();
}

inline
void G4Sphere::SetStartThetaAngle(G4double newSTheta)
{
  CheckThetaAngles(newSTheta, fDTheta);
  Initialize();
}

inline
void G4Sphere::SetDeltaThetaAngle(G4double newDTheta)
{
  CheckThetaAngles(fSTheta, newDTheta);
  Initialize();
}