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// $Id: G4Sphere.icc,v 1.11 2009/05/13 11:23:00 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// --------------------------------------------------------------------
// GEANT 4 inline definitions file
//
// G4Sphere.icc
//
// Implementation of inline methods of G4Sphere
// --------------------------------------------------------------------

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

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 
void G4Sphere::Initialize()
{
  fCubicVolume = 0.;
  fSurfaceArea = 0.;
  fpPolyhedron = 0;
}

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);
  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  = std::tan(fSTheta);
  tanSTheta2 = tanSTheta*tanSTheta;
  tanETheta  = std::tan(eTheta);
  tanETheta2 = tanETheta*tanETheta;
}

inline
void G4Sphere::CheckThetaAngles(G4double sTheta, G4double dTheta)
{
  if ( (sTheta<0) || (sTheta>pi) )
  {
    G4cerr << "ERROR - G4Sphere()::CheckThetaAngles()" << G4endl
           << "        Invalid starting Theta angle for solid: " << GetName()
           << G4endl;
    G4Exception("G4Sphere::CheckThetaAngles()", "InvalidSetup",
                FatalException, "sTheta outside 0-PI range.");
  }
  else
  {
    fSTheta=sTheta;
  }
  if ( dTheta+sTheta >= pi )
  {
    fDTheta=pi-sTheta;
  }
  else if ( dTheta > 0 )
  {
    fDTheta=dTheta;
  }
  else
  {
    G4cerr << "ERROR - G4Sphere()::CheckThetaAngles(): " << G4endl
           << "        Negative delta-Theta (" << dTheta << "), for solid: "
           << GetName() << G4endl;
    G4Exception("G4Sphere::CheckThetaAngles()", "InvalidSetup",
                FatalException, "Invalid dTheta.");
  }
  if ( fDTheta-fSTheta < pi ) { fFullThetaSphere = false; }
  else                        { fFullThetaSphere = true ; }
  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 = twopi - std::fmod(std::fabs(sPhi),twopi);
  }
  else
  {
    fSPhi = std::fmod(sPhi,twopi) ;
  }
  if ( fSPhi+fDPhi > twopi )
  {
    fSPhi -= twopi ;
  }
}

inline
void G4Sphere::CheckDPhiAngle(G4double dPhi)
{
  fFullPhiSphere = true;
  if ( dPhi >= twopi-kAngTolerance*0.5 )
  {
    fDPhi=twopi;
    fSPhi=0;
  }
  else
  {
    fFullPhiSphere = false;
    if ( dPhi > 0 )
    {
      fDPhi = dPhi;
    }
    else
    {
      G4cerr << "ERROR - G4Sphere()::CheckDPhiAngle(): " << GetName() << G4endl
             << "        Negative delta-Phi ! - "
             << dPhi << G4endl;
      G4Exception("G4Sphere::CheckDPhiAngle()", "InvalidSetup",
                  FatalException, "Invalid dphi.");
    }
  }
}

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

  InitializePhiTrigonometry();
}

inline
void G4Sphere::SetInsideRadius(G4double newRmin)
{
  fRmin= newRmin;
  Initialize();
}

inline
void G4Sphere::SetInnerRadius(G4double newRmin)
{
  fRmin= newRmin;
  Initialize();
}

inline
void G4Sphere::SetOuterRadius(G4double newRmax)
{
  fRmax= newRmax;
  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();
}

// Old access functions

inline
G4double G4Sphere::GetRmin() const 
{
  return GetInsideRadius();
}

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

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

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

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

inline
G4double G4Sphere::GetDTheta() const
{
  return GetDeltaThetaAngle();
}

inline
G4double G4Sphere::GetCubicVolume()
{
  if(fCubicVolume != 0.) {;}
  else { fCubicVolume = fDPhi*(std::cos(fSTheta)-std::cos(fSTheta+fDTheta))*
                              (fRmax*fRmax*fRmax-fRmin*fRmin*fRmin)/3.; }
  return fCubicVolume;
}