G4Paraboloid.icc

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// $Id: G4Paraboloid.icc 66356 2012-12-18 09:02:32Z gcosmo $
//
//
// --------------------------------------------------------------------
// GEANT 4 inline definitions file
//
// G4Paraboloid.icc
//
// Implementation of inline methods of G4Paraboloid
// --------------------------------------------------------------------

inline 
G4double G4Paraboloid::GetZHalfLength() const
{
  return dz;
}

inline 
G4double G4Paraboloid::GetRadiusPlusZ() const
{
  return r2;
}

inline
G4double G4Paraboloid::GetRadiusMinusZ() const
{
  return r1;
}

inline
void G4Paraboloid::SetZHalfLength(G4double pDz)
{
  if(pDz <= 0)
  {
    G4Exception("G4Paraboloid::SetZHalfLength()", "GeomSolids0002", 
                FatalException, "Invalid dimensions.");
  }
  else
  {
    dz = pDz;
    k1 = (sqr(r2) - sqr(r1)) / (2 * dz);
    k2 = (sqr(r2) + sqr(r1)) / 2;

    // This informs GetSurfaceArea() and GetCubicVolume() that it needs
    // to recalculate buffered value.
    //
    fSurfaceArea = 0.; 
    fCubicVolume = 0.;
  }
}

inline
void G4Paraboloid::SetRadiusPlusZ(G4double pR2)
{
  if(pR2 <= 0 || pR2 <= r1)
  {
    G4Exception("G4Paraboloid::SetRadiusPlusZ()", "GeomSolids0002", 
                FatalException, "Invalid dimensions.");
  }
  else
  {
    r2 = pR2;
    k1 = (sqr(r2) - sqr(r1)) / (2 * dz);
    k2 = (sqr(r2) + sqr(r1)) / 2;

    // This informs GetSurfaceArea() and GetCubicVolume() that it needs
    // to recalculate buffered value.
    //
    fSurfaceArea = 0.; 
    fCubicVolume = 0.;
  }
}

inline
void G4Paraboloid::SetRadiusMinusZ(G4double pR1)
{
  if(pR1 < 0 || pR1 >= r2)
  {
    G4Exception("G4Paraboloid::SetRadiusMinusZ()", "GeomSolids0002", 
                FatalException, "Invalid dimensions.");
  }
  else
  {
    r1 = pR1;
    k1 = (sqr(r2) - sqr(r1)) / (2 * dz);
    k2 = (sqr(r2) + sqr(r1)) / 2;

    // This informs GetSurfaceArea() and GetCubicVolume() that it needs
    // to recalculate buffered value.
    //
    fSurfaceArea = 0.; 
    fCubicVolume = 0.;
  }
}

inline
G4double G4Paraboloid::GetCubicVolume()
{
  if(fCubicVolume != 0 ) {;}
  else
  {
    fCubicVolume = CLHEP::twopi * k2 * dz;
  }
  return fCubicVolume;
}


inline
G4double G4Paraboloid::CalculateSurfaceArea() const
{
  G4double h1, h2, A1, A2;

  h1 = k2/k1 + dz;
  h2 = k2/k1 - dz;

  // Calculate surface area for the paraboloid full paraboloid
  // cutoff at z = dz (not the cutoff area though).

  A1 = sqr(r2) + 4 * sqr(h1);
  A1 *= sqr(A1); // Sets A1 = A1^3
  A1 = CLHEP::pi * r2 /6 / sqr(h1) * ( std::sqrt(A1) - r2 * r2 * r2);

  // Calculate surface area for the paraboloid full paraboloid
  // cutoff at z = -dz (not the cutoff area though).

  A2 = sqr(r1) + 4 * sqr(h2);
  A2 *= sqr(A2);// Sets A2 = A2^3

  if(h2 != 0)
    { A2 = CLHEP::pi * r1 /6 / sqr(h2) * ( std::sqrt(A2) - r1 * r1 * r1); }
  else
    { A2 = 0.; }

  return fSurfaceArea = A1 - A2 + (sqr(r1) + sqr(r2))*CLHEP::pi;
}

inline
G4double G4Paraboloid::GetSurfaceArea()
{
  if(fSurfaceArea == 0.) CalculateSurfaceArea();

  return fSurfaceArea;
}