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// $Id: G4Sphere.icc,v 1.8 2008/11/21 09:50:05 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-02-ref-02 $
//
// --------------------------------------------------------------------
// 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::SetInsideRadius(G4double newRmin)
{
  fRmin= newRmin;
  fCubicVolume= 0.;
  fSurfaceArea= 0.;
  fpPolyhedron = 0;
}

inline
void G4Sphere::SetInnerRadius(G4double newRmin)
{
  fRmin= newRmin;
  fCubicVolume= 0.;
  fSurfaceArea= 0.;
  fpPolyhedron = 0;
}

inline
void G4Sphere::SetOuterRadius(G4double newRmax)
{
  fRmax= newRmax;
  fCubicVolume= 0.;
  fSurfaceArea= 0.;
  fpPolyhedron = 0;
}

inline
void G4Sphere::SetStartPhiAngle(G4double newSphi)
{
  fSPhi= newSphi;
  fCubicVolume= 0.;
  fSurfaceArea= 0.;
  fpPolyhedron = 0;
}

inline
void G4Sphere::SetDeltaPhiAngle(G4double newDphi)
{
  fDPhi= newDphi;
  fCubicVolume= 0.;
  fSurfaceArea= 0.;
  fpPolyhedron = 0;
}

inline
void G4Sphere::SetStartThetaAngle(G4double newSTheta)
{
  fSTheta=newSTheta;
  fCubicVolume= 0.;
  fSurfaceArea= 0.;
  fpPolyhedron = 0;
}

inline
void G4Sphere::SetDeltaThetaAngle(G4double newDTheta)
{
  fDTheta=newDTheta;
  fCubicVolume= 0.;
  fSurfaceArea= 0.;
  fpPolyhedron = 0;
}

// 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;
}


inline
G4double G4Sphere::GetSurfaceArea()
{
  if(fSurfaceArea != 0.) {;}
  else
  {   
    G4double Rsq=fRmax*fRmax;
    G4double rsq=fRmin*fRmin;
         
    fSurfaceArea = fDPhi*(rsq+Rsq)*(std::cos(fSTheta)
                 - std::cos(fSTheta+fDTheta));
    if(fDPhi < twopi)
    {
      fSurfaceArea = fSurfaceArea + fDTheta*(Rsq-rsq);
    }
    if(fSTheta >0)
    {
      G4double acos1=std::acos( std::pow(std::sin(fSTheta),2)
                               *std::cos(fDPhi)
                               +std::pow(std::cos(fSTheta),2));
      if(fDPhi>pi)
      { 
        fSurfaceArea = fSurfaceArea + 0.5*(Rsq-rsq)*(twopi-acos1);
      }
      else
      {
        fSurfaceArea = fSurfaceArea + 0.5*(Rsq-rsq)*acos1;
      }
    }
    if(fDTheta+fSTheta < pi)
    {
      G4double acos2=std::acos( std::pow(std::sin(fSTheta+fDTheta),2)
                               *std::cos(fDPhi)
                               +std::pow(std::cos(fSTheta+fDTheta),2));
      if(fDPhi>pi)
      { 
        fSurfaceArea = fSurfaceArea + 0.5*(Rsq-rsq)*(twopi-acos2);
      }
      else
      {
        fSurfaceArea = fSurfaceArea + 0.5*(Rsq-rsq)*acos2;
      }
    }
  }
  return fSurfaceArea;
}