G4TwistedTubs Class Reference

#include <G4TwistedTubs.hh>

Inheritance diagram for G4TwistedTubs:

Public Member Functions
	G4TwistedTubs (const G4String &pname, G4double twistedangle, G4double endinnerrad, G4double endouterrad, G4double halfzlen, G4double dphi)
	G4TwistedTubs (const G4String &pname, G4double twistedangle, G4double endinnerrad, G4double endouterrad, G4double halfzlen, G4int nseg, G4double totphi)
	G4TwistedTubs (const G4String &pname, G4double twistedangle, G4double innerrad, G4double outerrad, G4double negativeEndz, G4double positiveEndz, G4double dphi)
	G4TwistedTubs (const G4String &pname, G4double twistedangle, G4double innerrad, G4double outerrad, G4double negativeEndz, G4double positiveEndz, G4int nseg, G4double totphi)
virtual	~G4TwistedTubs ()
void	ComputeDimensions (G4VPVParameterisation *, const G4int, const G4VPhysicalVolume *)
void	BoundingLimits (G4ThreeVector &pMin, G4ThreeVector &pMax) const
G4bool	CalculateExtent (const EAxis pAxis, const G4VoxelLimits &pVoxelLimit, const G4AffineTransform &pTransform, G4double &pMin, G4double &pMax) const
G4double	DistanceToIn (const G4ThreeVector &p, const G4ThreeVector &v) const
G4double	DistanceToIn (const G4ThreeVector &p) const
G4double	DistanceToOut (const G4ThreeVector &p, const G4ThreeVector &v, const G4bool calcnorm=false, G4bool *validnorm=nullptr, G4ThreeVector *n=nullptr) const
G4double	DistanceToOut (const G4ThreeVector &p) const
EInside	Inside (const G4ThreeVector &p) const
G4ThreeVector	SurfaceNormal (const G4ThreeVector &p) const
void	DescribeYourselfTo (G4VGraphicsScene &scene) const
G4Polyhedron *	CreatePolyhedron () const
G4Polyhedron *	GetPolyhedron () const
std::ostream &	StreamInfo (std::ostream &os) const
G4double	GetDPhi () const
G4double	GetPhiTwist () const
G4double	GetInnerRadius () const
G4double	GetOuterRadius () const
G4double	GetInnerStereo () const
G4double	GetOuterStereo () const
G4double	GetZHalfLength () const
G4double	GetKappa () const
G4double	GetTanInnerStereo () const
G4double	GetTanInnerStereo2 () const
G4double	GetTanOuterStereo () const
G4double	GetTanOuterStereo2 () const
G4double	GetEndZ (G4int i) const
G4double	GetEndPhi (G4int i) const
G4double	GetEndInnerRadius (G4int i) const
G4double	GetEndOuterRadius (G4int i) const
G4double	GetEndInnerRadius () const
G4double	GetEndOuterRadius () const
G4VisExtent	GetExtent () const
G4GeometryType	GetEntityType () const
G4VSolid *	Clone () const
G4double	GetCubicVolume ()
G4double	GetSurfaceArea ()
G4ThreeVector	GetPointOnSurface () const
	G4TwistedTubs (__void__ &)
	G4TwistedTubs (const G4TwistedTubs &rhs)
G4TwistedTubs &	operator= (const G4TwistedTubs &rhs)
Public Member Functions inherited from G4VSolid
	G4VSolid (const G4String &name)
virtual	~G4VSolid ()
G4bool	operator== (const G4VSolid &s) const
G4String	GetName () const
void	SetName (const G4String &name)
G4double	GetTolerance () const
virtual void	BoundingLimits (G4ThreeVector &pMin, G4ThreeVector &pMax) const
virtual G4bool	CalculateExtent (const EAxis pAxis, const G4VoxelLimits &pVoxelLimit, const G4AffineTransform &pTransform, G4double &pMin, G4double &pMax) const =0
virtual EInside	Inside (const G4ThreeVector &p) const =0
virtual G4ThreeVector	SurfaceNormal (const G4ThreeVector &p) const =0
virtual G4double	DistanceToIn (const G4ThreeVector &p, const G4ThreeVector &v) const =0
virtual G4double	DistanceToIn (const G4ThreeVector &p) const =0
virtual G4double	DistanceToOut (const G4ThreeVector &p, const G4ThreeVector &v, const G4bool calcNorm=false, G4bool *validNorm=nullptr, G4ThreeVector *n=nullptr) const =0
virtual G4double	DistanceToOut (const G4ThreeVector &p) const =0
virtual void	ComputeDimensions (G4VPVParameterisation *p, const G4int n, const G4VPhysicalVolume *pRep)
virtual G4double	GetCubicVolume ()
virtual G4double	GetSurfaceArea ()
virtual G4GeometryType	GetEntityType () const =0
virtual G4ThreeVector	GetPointOnSurface () const
virtual G4VSolid *	Clone () const
virtual std::ostream &	StreamInfo (std::ostream &os) const =0
void	DumpInfo () const
virtual void	DescribeYourselfTo (G4VGraphicsScene &scene) const =0
virtual G4VisExtent	GetExtent () const
virtual G4Polyhedron *	CreatePolyhedron () const
virtual G4Polyhedron *	GetPolyhedron () const
virtual const G4VSolid *	GetConstituentSolid (G4int no) const
virtual G4VSolid *	GetConstituentSolid (G4int no)
virtual const G4DisplacedSolid *	GetDisplacedSolidPtr () const
virtual G4DisplacedSolid *	GetDisplacedSolidPtr ()
	G4VSolid (__void__ &)
	G4VSolid (const G4VSolid &rhs)
G4VSolid &	operator= (const G4VSolid &rhs)
G4double	EstimateCubicVolume (G4int nStat, G4double epsilon) const
G4double	EstimateSurfaceArea (G4int nStat, G4double ell) const

Additional Inherited Members
Protected Member Functions inherited from G4VSolid
void	CalculateClippedPolygonExtent (G4ThreeVectorList &pPolygon, const G4VoxelLimits &pVoxelLimit, const EAxis pAxis, G4double &pMin, G4double &pMax) const
void	ClipCrossSection (G4ThreeVectorList *pVertices, const G4int pSectionIndex, const G4VoxelLimits &pVoxelLimit, const EAxis pAxis, G4double &pMin, G4double &pMax) const
void	ClipBetweenSections (G4ThreeVectorList *pVertices, const G4int pSectionIndex, const G4VoxelLimits &pVoxelLimit, const EAxis pAxis, G4double &pMin, G4double &pMax) const
void	ClipPolygon (G4ThreeVectorList &pPolygon, const G4VoxelLimits &pVoxelLimit, const EAxis pAxis) const
Protected Attributes inherited from G4VSolid
G4double	kCarTolerance

Detailed Description

Definition at line 55 of file G4TwistedTubs.hh.

Constructor & Destructor Documentation

G4TwistedTubs() [1/6]

G4TwistedTubs::G4TwistedTubs	(	const G4String &	pname,
		G4double	twistedangle,
		G4double	endinnerrad,
		G4double	endouterrad,
		G4double	halfzlen,
		G4double	dphi
	)

Definition at line 62 of file G4TwistedTubs.cc.

   : G4VSolid(pname), fDPhi(dphi), 
     fLowerEndcap(0), fUpperEndcap(0), fLatterTwisted(0),
     fFormerTwisted(0), fInnerHype(0), fOuterHype(0)
{
   if (endinnerrad < DBL_MIN)
   {
      G4Exception("G4TwistedTubs::G4TwistedTubs()", "GeomSolids0002",
                  FatalErrorInArgument, "Invalid end-inner-radius!");
   }
            
   G4double sinhalftwist = std::sin(0.5 * twistedangle);
 
   G4double endinnerradX = endinnerrad * sinhalftwist;
   G4double innerrad     = std::sqrt( endinnerrad * endinnerrad
                                 - endinnerradX * endinnerradX );
 
   G4double endouterradX = endouterrad * sinhalftwist;
   G4double outerrad     = std::sqrt( endouterrad * endouterrad
                                 - endouterradX * endouterradX );
   
   // temporary treatment!!
   SetFields(twistedangle, innerrad, outerrad, -halfzlen, halfzlen);
   CreateSurfaces();
}

G4TwistedTubs() [2/6]

G4TwistedTubs::G4TwistedTubs	(	const G4String &	pname,
		G4double	twistedangle,
		G4double	endinnerrad,
		G4double	endouterrad,
		G4double	halfzlen,
		G4int	nseg,
		G4double	totphi
	)

Definition at line 93 of file G4TwistedTubs.cc.

   : G4VSolid(pname),
     fLowerEndcap(0), fUpperEndcap(0), fLatterTwisted(0),
     fFormerTwisted(0), fInnerHype(0), fOuterHype(0)
{
 
   if (!nseg)
   {
      std::ostringstream message;
      message << "Invalid number of segments." << G4endl
              << "        nseg = " << nseg;
      G4Exception("G4TwistedTubs::G4TwistedTubs()", "GeomSolids0002",
                  FatalErrorInArgument, message);
   }
   if (totphi == DBL_MIN || endinnerrad < DBL_MIN)
   {
      G4Exception("G4TwistedTubs::G4TwistedTubs()", "GeomSolids0002",
                FatalErrorInArgument, "Invalid total-phi or end-inner-radius!");
   }
         
   G4double sinhalftwist = std::sin(0.5 * twistedangle);
 
   G4double endinnerradX = endinnerrad * sinhalftwist;
   G4double innerrad     = std::sqrt( endinnerrad * endinnerrad
                                 - endinnerradX * endinnerradX );
 
   G4double endouterradX = endouterrad * sinhalftwist;
   G4double outerrad     = std::sqrt( endouterrad * endouterrad
                                 - endouterradX * endouterradX );
   
   // temporary treatment!!
   fDPhi = totphi / nseg;
   SetFields(twistedangle, innerrad, outerrad, -halfzlen, halfzlen);
   CreateSurfaces();
}

G4TwistedTubs() [3/6]

G4TwistedTubs::G4TwistedTubs	(	const G4String &	pname,
		G4double	twistedangle,
		G4double	innerrad,
		G4double	outerrad,
		G4double	negativeEndz,
		G4double	positiveEndz,
		G4double	dphi
	)

Definition at line 135 of file G4TwistedTubs.cc.

   : G4VSolid(pname), fDPhi(dphi),
     fLowerEndcap(0), fUpperEndcap(0), fLatterTwisted(0),
     fFormerTwisted(0), fInnerHype(0), fOuterHype(0)
{
   if (innerrad < DBL_MIN)
   {
      G4Exception("G4TwistedTubs::G4TwistedTubs()", "GeomSolids0002",
                  FatalErrorInArgument, "Invalid end-inner-radius!");
   }
                 
   SetFields(twistedangle, innerrad, outerrad, negativeEndz, positiveEndz);
   CreateSurfaces();
}

G4TwistedTubs() [4/6]

G4TwistedTubs::G4TwistedTubs	(	const G4String &	pname,
		G4double	twistedangle,
		G4double	innerrad,
		G4double	outerrad,
		G4double	negativeEndz,
		G4double	positiveEndz,
		G4int	nseg,
		G4double	totphi
	)

Definition at line 156 of file G4TwistedTubs.cc.

   : G4VSolid(pname),
     fLowerEndcap(0), fUpperEndcap(0), fLatterTwisted(0),
     fFormerTwisted(0), fInnerHype(0), fOuterHype(0)
{
   if (!nseg)
   {
      std::ostringstream message;
      message << "Invalid number of segments." << G4endl
              << "        nseg = " << nseg;
      G4Exception("G4TwistedTubs::G4TwistedTubs()", "GeomSolids0002",
                  FatalErrorInArgument, message);
   }
   if (totphi == DBL_MIN || innerrad < DBL_MIN)
   {
      G4Exception("G4TwistedTubs::G4TwistedTubs()", "GeomSolids0002",
                FatalErrorInArgument, "Invalid total-phi or end-inner-radius!");
   }
            
   fDPhi = totphi / nseg;
   SetFields(twistedangle, innerrad, outerrad, negativeEndz, positiveEndz);
   CreateSurfaces();
}

~G4TwistedTubs()

G4TwistedTubs::~G4TwistedTubs ( )

virtual

Definition at line 202 of file G4TwistedTubs.cc.

{
   if (fLowerEndcap)   { delete fLowerEndcap;   }
   if (fUpperEndcap)   { delete fUpperEndcap;   }
   if (fLatterTwisted) { delete fLatterTwisted; }
   if (fFormerTwisted) { delete fFormerTwisted; }
   if (fInnerHype)     { delete fInnerHype;     }
   if (fOuterHype)     { delete fOuterHype;     }
   if (fpPolyhedron)   { delete fpPolyhedron; fpPolyhedron = nullptr; }
}

G4TwistedTubs() [5/6]

G4TwistedTubs::G4TwistedTubs

(

__void__ &

a

)

Definition at line 190 of file G4TwistedTubs.cc.

  : G4VSolid(a), fPhiTwist(0.), fInnerRadius(0.), fOuterRadius(0.), fDPhi(0.),
    fZHalfLength(0.), fInnerStereo(0.), fOuterStereo(0.), fTanInnerStereo(0.),
    fTanOuterStereo(0.), fKappa(0.), fInnerRadius2(0.), fOuterRadius2(0.),
    fTanInnerStereo2(0.), fTanOuterStereo2(0.), fLowerEndcap(0), fUpperEndcap(0),
    fLatterTwisted(0), fFormerTwisted(0), fInnerHype(0), fOuterHype(0)
{
}

G4TwistedTubs() [6/6]

G4TwistedTubs::G4TwistedTubs

(

const G4TwistedTubs &

rhs

)

Definition at line 216 of file G4TwistedTubs.cc.

  : G4VSolid(rhs), fPhiTwist(rhs.fPhiTwist),
    fInnerRadius(rhs.fInnerRadius), fOuterRadius(rhs.fOuterRadius),
    fDPhi(rhs.fDPhi), fZHalfLength(rhs.fZHalfLength),
    fInnerStereo(rhs.fInnerStereo), fOuterStereo(rhs.fOuterStereo),
    fTanInnerStereo(rhs.fTanInnerStereo), fTanOuterStereo(rhs.fTanOuterStereo),
    fKappa(rhs.fKappa), fInnerRadius2(rhs.fInnerRadius2), 
    fOuterRadius2(rhs.fOuterRadius2), fTanInnerStereo2(rhs.fTanInnerStereo2),
    fTanOuterStereo2(rhs.fTanOuterStereo2),
    fLowerEndcap(0), fUpperEndcap(0), fLatterTwisted(0), fFormerTwisted(0),
    fInnerHype(0), fOuterHype(0),
    fCubicVolume(rhs.fCubicVolume), fSurfaceArea(rhs.fSurfaceArea),
    fLastInside(rhs.fLastInside), fLastNormal(rhs.fLastNormal),
    fLastDistanceToIn(rhs.fLastDistanceToIn),
    fLastDistanceToOut(rhs.fLastDistanceToOut),
    fLastDistanceToInWithV(rhs.fLastDistanceToInWithV),
    fLastDistanceToOutWithV(rhs.fLastDistanceToOutWithV)
{
  for (auto i=0; i<2; ++i)
  {
    fEndZ[i] = rhs.fEndZ[i];
    fEndInnerRadius[i] = rhs.fEndInnerRadius[i];
    fEndOuterRadius[i] = rhs.fEndOuterRadius[i];
    fEndPhi[i] = rhs.fEndPhi[i];
    fEndZ2[i] = rhs.fEndZ2[i];
  }
  CreateSurfaces();
}

Member Function Documentation

BoundingLimits()

void G4TwistedTubs::BoundingLimits ( G4ThreeVector &  pMin, G4ThreeVector &  pMax  ) const

virtual

Reimplemented from G4VSolid.

Definition at line 309 of file G4TwistedTubs.cc.

{
  // Find bounding tube
  G4double rmin = GetInnerRadius();
  G4double rmax = GetEndOuterRadius();
 
  G4double zmin = std::min(GetEndZ(0), GetEndZ(1));
  G4double zmax = std::max(GetEndZ(0), GetEndZ(1));
 
  G4double dphi = 0.5*GetDPhi();
  G4double sphi = std::min(GetEndPhi(0), GetEndPhi(1)) - dphi;
  G4double ephi = std::max(GetEndPhi(0), GetEndPhi(1)) + dphi;
  G4double totalphi = ephi - sphi;
 
  // Find bounding box
  if (dphi <= 0 || totalphi >= CLHEP::twopi)
  {
    pMin.set(-rmax,-rmax, zmin);
    pMax.set( rmax, rmax, zmax);
  }
  else
  {
    G4TwoVector vmin,vmax;
    G4GeomTools::DiskExtent(rmin, rmax, sphi, totalphi, vmin, vmax);
    pMin.set(vmin.x(), vmin.y(), zmin);
    pMax.set(vmax.x(), vmax.y(), zmax);
  }
 
  // Check correctness of the bounding box
  //
  if (pMin.x() >= pMax.x() || pMin.y() >= pMax.y() || pMin.z() >= pMax.z())
  {
    std::ostringstream message;
    message << "Bad bounding box (min >= max) for solid: "
            << GetName() << " !"
            << "\npMin = " << pMin
            << "\npMax = " << pMax;
    G4Exception("G4TwistedTubs::BoundingLimits()", "GeomMgt0001",
                JustWarning, message);
    DumpInfo();
  }
}

Referenced by CalculateExtent(), and GetExtent().

CalculateExtent()

G4bool G4TwistedTubs::CalculateExtent ( const EAxis  pAxis, const G4VoxelLimits &  pVoxelLimit, const G4AffineTransform &  pTransform, G4double &  pMin, G4double &  pMax  ) const

virtual

Implements G4VSolid.

Definition at line 357 of file G4TwistedTubs.cc.

{
  G4ThreeVector bmin, bmax;
 
  // Get bounding box
  BoundingLimits(bmin,bmax);
 
  // Find extent
  G4BoundingEnvelope bbox(bmin,bmax);
  return bbox.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
}

Clone()

G4VSolid * G4TwistedTubs::Clone ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 1023 of file G4TwistedTubs.cc.

{
  return new G4TwistedTubs(*this);
}

ComputeDimensions()

void G4TwistedTubs::ComputeDimensions ( G4VPVParameterisation *  , const  G4int, const G4VPhysicalVolume *    )

virtual

Reimplemented from G4VSolid.

Definition at line 297 of file G4TwistedTubs.cc.

{
  G4Exception("G4TwistedTubs::ComputeDimensions()",
              "GeomSolids0001", FatalException,
              "G4TwistedTubs does not support Parameterisation.");
}

CreatePolyhedron()

G4Polyhedron * G4TwistedTubs::CreatePolyhedron ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 898 of file G4TwistedTubs.cc.

{
  // number of meshes
  //
  G4double absPhiTwist = std::abs(fPhiTwist);
  G4double dA = std::max(fDPhi,absPhiTwist);
  const G4int k =
    G4int(G4Polyhedron::GetNumberOfRotationSteps() * dA / twopi) + 2;
  const G4int n =
    G4int(G4Polyhedron::GetNumberOfRotationSteps() * absPhiTwist / twopi) + 2;
 
  const G4int nnodes = 4*(k-1)*(n-2) + 2*k*k ;
  const G4int nfaces = 4*(k-1)*(n-1) + 2*(k-1)*(k-1) ;
 
  G4Polyhedron* ph = new G4Polyhedron;
  typedef G4double G4double3[3];
  typedef G4int G4int4[4];
  G4double3* xyz = new G4double3[nnodes];  // number of nodes 
  G4int4*  faces = new G4int4[nfaces] ;    // number of faces
  fLowerEndcap->GetFacets(k,k,xyz,faces,0) ;
  fUpperEndcap->GetFacets(k,k,xyz,faces,1) ;
  fInnerHype->GetFacets(k,n,xyz,faces,2) ;
  fFormerTwisted->GetFacets(k,n,xyz,faces,3) ;
  fOuterHype->GetFacets(k,n,xyz,faces,4) ;
  fLatterTwisted->GetFacets(k,n,xyz,faces,5) ;
 
  ph->createPolyhedron(nnodes,nfaces,xyz,faces);
 
  delete[] xyz;
  delete[] faces;
 
  return ph;
}

Referenced by GetPolyhedron().

DescribeYourselfTo()

void G4TwistedTubs::DescribeYourselfTo ( G4VGraphicsScene &  scene ) const

virtual

Implements G4VSolid.

Definition at line 876 of file G4TwistedTubs.cc.

{
  scene.AddSolid (*this);
}

DistanceToIn() [1/2]

G4double G4TwistedTubs::DistanceToIn ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 572 of file G4TwistedTubs.cc.

{
   // DistanceToIn(p):
   // Calculate distance to surface of shape from `outside',
   // allowing for tolerance
   
   //
   // checking last value
   //
   
   G4ThreeVector* tmpp;
   G4double* tmpdist;
   if (fLastDistanceToIn.p == p)
   {
     return fLastDistanceToIn.value;
   }
   else
   {
      tmpp    = const_cast<G4ThreeVector*>(&(fLastDistanceToIn.p));
      tmpdist = const_cast<G4double*>(&(fLastDistanceToIn.value));
      tmpp->set(p.x(), p.y(), p.z());
   }
 
   //
   // Calculate DistanceToIn(p) 
   //
   
   EInside currentside = Inside(p);
 
   switch (currentside)
   {
      case (kInside) :
      {}
      case (kSurface) :
      {
         *tmpdist = 0.;
         return fLastDistanceToIn.value;
      }
      case (kOutside) :
      {
         // Initialize
         G4double distance = kInfinity;   
 
         // find intersections and choose nearest one.
         G4VTwistSurface *surfaces[6];
         surfaces[0] = fLowerEndcap;
         surfaces[1] = fUpperEndcap;
         surfaces[2] = fLatterTwisted;
         surfaces[3] = fFormerTwisted;
         surfaces[4] = fInnerHype;
         surfaces[5] = fOuterHype;
 
         G4ThreeVector xx;
         G4ThreeVector bestxx;
         for (auto i=0; i<6; ++i)
         {
            G4double tmpdistance = surfaces[i]->DistanceTo(p, xx);
            if (tmpdistance < distance)
            {
               distance = tmpdistance;
               bestxx = xx;
            }
         }
         *tmpdist = distance;
         return fLastDistanceToIn.value;
      }
      default :
      {
         G4Exception("G4TwistedTubs::DistanceToIn(p)", "GeomSolids0003",
                     FatalException, "Unknown point location!");
      }
   } // switch end
 
   return kInfinity;
}

DistanceToIn() [2/2]

G4double G4TwistedTubs::DistanceToIn ( const G4ThreeVector &  p, const G4ThreeVector &  v  ) const

virtual

Implements G4VSolid.

Definition at line 482 of file G4TwistedTubs.cc.

{
 
   // DistanceToIn (p, v):
   // Calculate distance to surface of shape from `outside' 
   // along with the v, allowing for tolerance.
   // The function returns kInfinity if no intersection or
   // just grazing within tolerance.
 
   //
   // checking last value
   //
   
   G4ThreeVector* tmpp;
   G4ThreeVector* tmpv;
   G4double* tmpdist;
   if ((fLastDistanceToInWithV.p == p) && (fLastDistanceToInWithV.vec == v))
   {
     return fLastDistanceToIn.value;
   }
   else
   {
      tmpp    = const_cast<G4ThreeVector*>(&(fLastDistanceToInWithV.p));
      tmpv    = const_cast<G4ThreeVector*>(&(fLastDistanceToInWithV.vec));
      tmpdist = const_cast<G4double*>(&(fLastDistanceToInWithV.value));
      tmpp->set(p.x(), p.y(), p.z());
      tmpv->set(v.x(), v.y(), v.z());
   }
 
   //
   // Calculate DistanceToIn(p,v)
   //
   
   EInside currentside = Inside(p);
 
   if (currentside == kInside)
   {
   }
   else
   {
     if (currentside == kSurface)
     {
       // particle is just on a boundary.
       // If the particle is entering to the volume, return 0.
       //
       G4ThreeVector normal = SurfaceNormal(p);
       if (normal*v < 0)
       {
         *tmpdist = 0.;
         return fLastDistanceToInWithV.value;
       } 
     }
   }
      
   // now, we can take smallest positive distance.
   
   // Initialize
   //
   G4double      distance = kInfinity;   
 
   // find intersections and choose nearest one.
   //
   G4VTwistSurface* surfaces[6];
   surfaces[0] = fLowerEndcap;
   surfaces[1] = fUpperEndcap;
   surfaces[2] = fLatterTwisted;
   surfaces[3] = fFormerTwisted;
   surfaces[4] = fInnerHype;
   surfaces[5] = fOuterHype;
   
   G4ThreeVector xx;
   G4ThreeVector bestxx;
   for (auto i=0; i<6; ++i)
   {
      G4double tmpdistance = surfaces[i]->DistanceToIn(p, v, xx);
      if (tmpdistance < distance)
      {
         distance = tmpdistance;
         bestxx = xx;
      }
   }
   *tmpdist = distance;
 
   return fLastDistanceToInWithV.value;
}

DistanceToOut() [1/2]

G4double G4TwistedTubs::DistanceToOut ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 762 of file G4TwistedTubs.cc.

{
   // DistanceToOut(p):
   // Calculate distance to surface of shape from `inside', 
   // allowing for tolerance
 
   //
   // checking last value
   //
   
   G4ThreeVector* tmpp;
   G4double* tmpdist;
   if (fLastDistanceToOut.p == p)
   {
      return fLastDistanceToOut.value;
   }
   else
   {
      tmpp    = const_cast<G4ThreeVector*>(&(fLastDistanceToOut.p));
      tmpdist = const_cast<G4double*>(&(fLastDistanceToOut.value));
      tmpp->set(p.x(), p.y(), p.z());
   }
   
   //
   // Calculate DistanceToOut(p)
   //
   
   EInside currentside = Inside(p);
 
   switch (currentside)
   {
      case (kOutside) :
      {
      }
      case (kSurface) :
      {
        *tmpdist = 0.;
         return fLastDistanceToOut.value;
      }
      case (kInside) :
      {
         // Initialize
         G4double      distance = kInfinity;
   
         // find intersections and choose nearest one.
         G4VTwistSurface* surfaces[6];
         surfaces[0] = fLatterTwisted;
         surfaces[1] = fFormerTwisted;
         surfaces[2] = fInnerHype;
         surfaces[3] = fOuterHype;
         surfaces[4] = fLowerEndcap;
         surfaces[5] = fUpperEndcap;
 
         G4ThreeVector xx;
         G4ThreeVector bestxx;
         for (auto i=0; i<6; ++i)
         {
            G4double tmpdistance = surfaces[i]->DistanceTo(p, xx);
            if (tmpdistance < distance)
            {
               distance = tmpdistance;
               bestxx = xx;
            }
         }
         *tmpdist = distance;
   
         return fLastDistanceToOut.value;
      }
      default :
      {
         G4Exception("G4TwistedTubs::DistanceToOut(p)", "GeomSolids0003",
                     FatalException, "Unknown point location!");
      }
   } // switch end
 
   return 0.;
}

DistanceToOut() [2/2]

G4double G4TwistedTubs::DistanceToOut ( const G4ThreeVector &  p, const G4ThreeVector &  v, const G4bool  calcnorm = false, G4bool *  validnorm = nullptr, G4ThreeVector *  n = nullptr  ) const

virtual

Implements G4VSolid.

Definition at line 651 of file G4TwistedTubs.cc.

{
   // DistanceToOut (p, v):
   // Calculate distance to surface of shape from `inside'
   // along with the v, allowing for tolerance.
   // The function returns kInfinity if no intersection or
   // just grazing within tolerance.
 
   //
   // checking last value
   //
   
   G4ThreeVector* tmpp;
   G4ThreeVector* tmpv;
   G4double* tmpdist;
   if ((fLastDistanceToOutWithV.p == p) && (fLastDistanceToOutWithV.vec == v) )
   {
     return fLastDistanceToOutWithV.value;
   }
   else
   {
      tmpp    = const_cast<G4ThreeVector*>(&(fLastDistanceToOutWithV.p));
      tmpv    = const_cast<G4ThreeVector*>(&(fLastDistanceToOutWithV.vec));
      tmpdist = const_cast<G4double*>(&(fLastDistanceToOutWithV.value));
      tmpp->set(p.x(), p.y(), p.z());
      tmpv->set(v.x(), v.y(), v.z());
   }
 
   //
   // Calculate DistanceToOut(p,v)
   //
   
   EInside currentside = Inside(p);
 
   if (currentside == kOutside)
   {
   }
   else
   {
     if (currentside == kSurface)
     {
       // particle is just on a boundary.
       // If the particle is exiting from the volume, return 0.
       //
       G4ThreeVector normal = SurfaceNormal(p);
       G4VTwistSurface *blockedsurface = fLastNormal.surface[0];
       if (normal*v > 0)
       {
         if (calcNorm)
         {
           *norm = (blockedsurface->GetNormal(p, true));
           *validNorm = blockedsurface->IsValidNorm();
         }
         *tmpdist = 0.;
         return fLastDistanceToOutWithV.value;
       }
     }
   }
      
   // now, we can take smallest positive distance.
   
   // Initialize
   //
   G4double distance = kInfinity;
       
   // find intersections and choose nearest one.
   //
   G4VTwistSurface* surfaces[6];
   surfaces[0] = fLatterTwisted;
   surfaces[1] = fFormerTwisted;
   surfaces[2] = fInnerHype;
   surfaces[3] = fOuterHype;
   surfaces[4] = fLowerEndcap;
   surfaces[5] = fUpperEndcap;
   
   G4int besti = -1;
   G4ThreeVector xx;
   G4ThreeVector bestxx;
   for (auto i=0; i<6; ++i)
   {
      G4double tmpdistance = surfaces[i]->DistanceToOut(p, v, xx);
      if (tmpdistance < distance)
      {
         distance = tmpdistance;
         bestxx = xx; 
         besti = i;
      }
   }
 
   if (calcNorm)
   {
      if (besti != -1)
      {
         *norm = (surfaces[besti]->GetNormal(p, true));
         *validNorm = surfaces[besti]->IsValidNorm();
      }
   }
 
   *tmpdist = distance;
 
   return fLastDistanceToOutWithV.value;
}

GetCubicVolume()

G4double G4TwistedTubs::GetCubicVolume ( )

virtual

Reimplemented from G4VSolid.

Definition at line 1031 of file G4TwistedTubs.cc.

{
  if (fCubicVolume == 0.)
  {
    G4double DPhi  = GetDPhi();
    G4double Z0    = GetEndZ(0);
    G4double Z1    = GetEndZ(1);
    G4double Ain   = GetInnerRadius();
    G4double Aout  = GetOuterRadius();
    G4double R0in  = GetEndInnerRadius(0);
    G4double R1in  = GetEndInnerRadius(1);
    G4double R0out = GetEndOuterRadius(0);
    G4double R1out = GetEndOuterRadius(1);
 
    // V_hyperboloid = pi*h*(2*a*a + R*R)/3
    fCubicVolume = (2.*(Z1 - Z0)*(Aout + Ain)*(Aout - Ain)
                    + Z1*(R1out + R1in)*(R1out - R1in)
                    - Z0*(R0out + R0in)*(R0out - R0in))*DPhi/6.;
  }
  return fCubicVolume;
}

GetDPhi()

G4double G4TwistedTubs::GetDPhi ( ) const

inline

Definition at line 130 of file G4TwistedTubs.hh.

{ return fDPhi       ; }

Referenced by BoundingLimits(), GetCubicVolume(), G4tgbGeometryDumper::GetSolidParams(), GetSurfaceArea(), and G4GDMLWriteSolids::TwistedtubsWrite().

GetEndInnerRadius() [1/2]

G4double G4TwistedTubs::GetEndInnerRadius ( ) const

inline

Definition at line 150 of file G4TwistedTubs.hh.

                  { return (fEndInnerRadius[0] > fEndInnerRadius[1] ?
                    fEndInnerRadius[0] : fEndInnerRadius[1]); }

Referenced by GetCubicVolume(), GetPointOnSurface(), and GetSurfaceArea().

GetEndInnerRadius() [2/2]

G4double G4TwistedTubs::GetEndInnerRadius ( G4int  i ) const

inline

Definition at line 146 of file G4TwistedTubs.hh.

                  { return fEndInnerRadius[i]; }

GetEndOuterRadius() [1/2]

G4double G4TwistedTubs::GetEndOuterRadius ( ) const

inline

Definition at line 153 of file G4TwistedTubs.hh.

                  { return (fEndOuterRadius[0] > fEndOuterRadius[1] ?
                    fEndOuterRadius[0] : fEndOuterRadius[1]); }

Referenced by BoundingLimits(), GetCubicVolume(), GetPointOnSurface(), and GetSurfaceArea().

GetEndOuterRadius() [2/2]

G4double G4TwistedTubs::GetEndOuterRadius ( G4int  i ) const

inline

Definition at line 148 of file G4TwistedTubs.hh.

                  { return fEndOuterRadius[i]; }

GetEndPhi()

G4double G4TwistedTubs::GetEndPhi ( G4int  i ) const

inline

Definition at line 145 of file G4TwistedTubs.hh.

{ return fEndPhi[i]; }

Referenced by BoundingLimits().

GetEndZ()

G4double G4TwistedTubs::GetEndZ ( G4int  i ) const

inline

Definition at line 144 of file G4TwistedTubs.hh.

{ return fEndZ[i]  ; }

Referenced by BoundingLimits(), GetCubicVolume(), GetSurfaceArea(), and G4GDMLWriteSolids::TwistedtubsWrite().

GetEntityType()

G4GeometryType G4TwistedTubs::GetEntityType ( ) const

virtual

Implements G4VSolid.

Definition at line 1015 of file G4TwistedTubs.cc.

{
  return G4String("G4TwistedTubs");
}

GetExtent()

G4VisExtent G4TwistedTubs::GetExtent ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 884 of file G4TwistedTubs.cc.

{
  // Define the sides of the box into which the G4Tubs instance would fit.
  //
  G4ThreeVector pmin,pmax;
  BoundingLimits(pmin,pmax);
  return G4VisExtent(pmin.x(),pmax.x(),
                     pmin.y(),pmax.y(),
                     pmin.z(),pmax.z());
}

GetInnerRadius()

G4double G4TwistedTubs::GetInnerRadius ( ) const

inline

Definition at line 132 of file G4TwistedTubs.hh.

{ return fInnerRadius; }

Referenced by BoundingLimits(), GetCubicVolume(), G4tgbGeometryDumper::GetSolidParams(), GetSurfaceArea(), and G4GDMLWriteSolids::TwistedtubsWrite().

GetInnerStereo()

G4double G4TwistedTubs::GetInnerStereo ( ) const

inline

Definition at line 134 of file G4TwistedTubs.hh.

{ return fInnerStereo; }

GetKappa()

G4double G4TwistedTubs::GetKappa ( ) const

inline

Definition at line 137 of file G4TwistedTubs.hh.

{ return fKappa      ; }

GetOuterRadius()

G4double G4TwistedTubs::GetOuterRadius ( ) const

inline

Definition at line 133 of file G4TwistedTubs.hh.

{ return fOuterRadius; }

Referenced by GetCubicVolume(), G4tgbGeometryDumper::GetSolidParams(), GetSurfaceArea(), and G4GDMLWriteSolids::TwistedtubsWrite().

GetOuterStereo()

G4double G4TwistedTubs::GetOuterStereo ( ) const

inline

Definition at line 135 of file G4TwistedTubs.hh.

{ return fOuterStereo; }

GetPhiTwist()

G4double G4TwistedTubs::GetPhiTwist ( ) const

inline

Definition at line 131 of file G4TwistedTubs.hh.

{ return fPhiTwist   ; }

Referenced by G4tgbGeometryDumper::GetSolidParams(), and G4GDMLWriteSolids::TwistedtubsWrite().

GetPointOnSurface()

G4ThreeVector G4TwistedTubs::GetPointOnSurface ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 1147 of file G4TwistedTubs.cc.

{
 
  G4double z = G4RandFlat::shoot(fEndZ[0],fEndZ[1]);
  G4double phi , phimin, phimax ;
  G4double x   , xmin,   xmax ;
  G4double r   , rmin,   rmax ;
 
  G4double a1 = fOuterHype->GetSurfaceArea() ;
  G4double a2 = fInnerHype->GetSurfaceArea() ;
  G4double a3 = fLatterTwisted->GetSurfaceArea() ;
  G4double a4 = fFormerTwisted->GetSurfaceArea() ;
  G4double a5 = fLowerEndcap->GetSurfaceArea()  ;
  G4double a6 = fUpperEndcap->GetSurfaceArea() ;
 
  G4double chose = G4RandFlat::shoot(0.,a1 + a2 + a3 + a4 + a5 + a6) ;
 
  if(chose < a1)
  {
 
    phimin = fOuterHype->GetBoundaryMin(z) ;
    phimax = fOuterHype->GetBoundaryMax(z) ;
    phi = G4RandFlat::shoot(phimin,phimax) ;
 
    return fOuterHype->SurfacePoint(phi,z,true) ;
 
  }
  else if ( (chose >= a1) && (chose < a1 + a2 ) )
  {
 
    phimin = fInnerHype->GetBoundaryMin(z) ;
    phimax = fInnerHype->GetBoundaryMax(z) ;
    phi = G4RandFlat::shoot(phimin,phimax) ;
 
    return fInnerHype->SurfacePoint(phi,z,true) ;
 
  }
  else if ( (chose >= a1 + a2 ) && (chose < a1 + a2 + a3 ) ) 
  {
 
    xmin = fLatterTwisted->GetBoundaryMin(z) ; 
    xmax = fLatterTwisted->GetBoundaryMax(z) ;
    x = G4RandFlat::shoot(xmin,xmax) ;
    
    return fLatterTwisted->SurfacePoint(x,z,true) ;
 
  }
  else if ( (chose >= a1 + a2 + a3  ) && (chose < a1 + a2 + a3 + a4  ) )
  {
 
    xmin = fFormerTwisted->GetBoundaryMin(z) ; 
    xmax = fFormerTwisted->GetBoundaryMax(z) ;
    x = G4RandFlat::shoot(xmin,xmax) ;
 
    return fFormerTwisted->SurfacePoint(x,z,true) ;
   }
  else if( (chose >= a1 + a2 + a3 + a4  )&&(chose < a1 + a2 + a3 + a4 + a5 ) )
  {
    rmin = GetEndInnerRadius(0) ;
    rmax = GetEndOuterRadius(0) ;
    r = std::sqrt(G4RandFlat::shoot()*(sqr(rmax)-sqr(rmin))+sqr(rmin));
 
    phimin = fLowerEndcap->GetBoundaryMin(r) ; 
    phimax = fLowerEndcap->GetBoundaryMax(r) ;
    phi    = G4RandFlat::shoot(phimin,phimax) ;
 
    return fLowerEndcap->SurfacePoint(phi,r,true) ;
  }
  else
  {
    rmin = GetEndInnerRadius(1) ;
    rmax = GetEndOuterRadius(1) ;
    r = rmin + (rmax-rmin)*std::sqrt(G4RandFlat::shoot());
 
    phimin = fUpperEndcap->GetBoundaryMin(r) ; 
    phimax = fUpperEndcap->GetBoundaryMax(r) ;
    phi    = G4RandFlat::shoot(phimin,phimax) ;
 
    return fUpperEndcap->SurfacePoint(phi,r,true) ;
  }
}

GetPolyhedron()

G4Polyhedron * G4TwistedTubs::GetPolyhedron ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 935 of file G4TwistedTubs.cc.

{
  if (fpPolyhedron == nullptr ||
      fRebuildPolyhedron ||
      fpPolyhedron->GetNumberOfRotationStepsAtTimeOfCreation() !=
      fpPolyhedron->GetNumberOfRotationSteps())
  {
    G4AutoLock l(&polyhedronMutex);
    delete fpPolyhedron;
    fpPolyhedron = CreatePolyhedron();
    fRebuildPolyhedron = false;
    l.unlock();
  }
  return fpPolyhedron;
}

GetSurfaceArea()

G4double G4TwistedTubs::GetSurfaceArea ( )

virtual

Reimplemented from G4VSolid.

Definition at line 1104 of file G4TwistedTubs.cc.

{
  if (fSurfaceArea == 0.)
  {
    G4double dphi = GetDPhi();
    G4double Ainn = GetInnerRadius();
    G4double Aout = GetOuterRadius();
    G4double Rinn0 = GetEndInnerRadius(0);
    G4double Rout0 = GetEndOuterRadius(0);
    G4double Rinn1 = GetEndInnerRadius(1);
    G4double Rout1 = GetEndOuterRadius(1);
    G4double z0 = GetEndZ(0);
    G4double z1 = GetEndZ(1);
 
    G4double base0 = 0.5*dphi*(Rout0*Rout0 - Rinn0*Rinn0); // lower base
    G4double inner0 = GetLateralArea(Ainn, Rinn0, z0); // lower inner surface
    G4double outer0 = GetLateralArea(Aout, Rout0, z0); // lower outer surface
    G4double cut0 =                                    // lower phi cut
      GetPhiCutArea(Aout, Rout0, z0) - GetPhiCutArea(Ainn, Rinn0, z0);
 
    G4double base1 = base0;
    G4double inner1 = inner0;
    G4double outer1 = outer0;
    G4double cut1 = cut0;
    if (std::abs(z0) != std::abs(z1))
    {
      base1 = 0.5*dphi*(Rout1*Rout1 - Rinn1*Rinn1); // upper base
      inner1 = GetLateralArea(Ainn, Rinn1, z1); // upper inner surface
      outer1 = GetLateralArea(Aout, Rout1, z1); // upper outer surface
      cut1 =                                    // upper phi cut
      GetPhiCutArea(Aout, Rout1, z1) - GetPhiCutArea(Ainn, Rinn1, z1);
    }
    fSurfaceArea = base0 + base1 +
      ((z0*z1 < 0) ?
      (inner0 + inner1 + outer0 + outer1 + 2.*(cut0 + cut1)) :
      std::abs(inner0 - inner1 + outer0 - outer1 + 2.*(cut0 - cut1)));
  }
  return fSurfaceArea;
}

GetTanInnerStereo()

G4double G4TwistedTubs::GetTanInnerStereo ( ) const

inline

Definition at line 139 of file G4TwistedTubs.hh.

{ return fTanInnerStereo  ; }

GetTanInnerStereo2()

G4double G4TwistedTubs::GetTanInnerStereo2 ( ) const

inline

Definition at line 140 of file G4TwistedTubs.hh.

{ return fTanInnerStereo2 ; }

GetTanOuterStereo()

G4double G4TwistedTubs::GetTanOuterStereo ( ) const

inline

Definition at line 141 of file G4TwistedTubs.hh.

{ return fTanOuterStereo  ; }

GetTanOuterStereo2()

G4double G4TwistedTubs::GetTanOuterStereo2 ( ) const

inline

Definition at line 142 of file G4TwistedTubs.hh.

{ return fTanOuterStereo2 ; }

GetZHalfLength()

G4double G4TwistedTubs::GetZHalfLength ( ) const

inline

Definition at line 136 of file G4TwistedTubs.hh.

{ return fZHalfLength; }

Referenced by G4tgbGeometryDumper::GetSolidParams().

Inside()

EInside G4TwistedTubs::Inside ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 376 of file G4TwistedTubs.cc.

{
 
   const G4double halftol
     = 0.5 * G4GeometryTolerance::GetInstance()->GetRadialTolerance();
   // static G4int timerid = -1;
   // G4Timer timer(timerid, "G4TwistedTubs", "Inside");
   // timer.Start();
 
   G4ThreeVector *tmpp;
   EInside       *tmpinside;
   if (fLastInside.p == p)
   {
     return fLastInside.inside;
   }
   else
   {
      tmpp      = const_cast<G4ThreeVector*>(&(fLastInside.p));
      tmpinside = const_cast<EInside*>(&(fLastInside.inside));
      tmpp->set(p.x(), p.y(), p.z());
   }
   
   EInside  outerhypearea = ((G4TwistTubsHypeSide *)fOuterHype)->Inside(p);
   G4double innerhyperho  = ((G4TwistTubsHypeSide *)fInnerHype)->GetRhoAtPZ(p);
   G4double distanceToOut = p.getRho() - innerhyperho; // +ve: inside
 
   if ((outerhypearea == kOutside) || (distanceToOut < -halftol))
   {
      *tmpinside = kOutside;
   }
   else if (outerhypearea == kSurface)
   {
      *tmpinside = kSurface;
   }
   else
   {
      if (distanceToOut <= halftol)
      {
         *tmpinside = kSurface;
      }
      else
      {
         *tmpinside = kInside;
      }
   }
 
   return fLastInside.inside;
}

Referenced by DistanceToIn(), and DistanceToOut().

operator=()

G4TwistedTubs & G4TwistedTubs::operator=

(

const G4TwistedTubs &

rhs

)

Definition at line 249 of file G4TwistedTubs.cc.

{
   // Check assignment to self
   //
   if (this == &rhs)  { return *this; }
 
   // Copy base class data
   //
   G4VSolid::operator=(rhs);
 
   // Copy data
   //
   fPhiTwist= rhs.fPhiTwist;
   fInnerRadius= rhs.fInnerRadius; fOuterRadius= rhs.fOuterRadius;
   fDPhi= rhs.fDPhi; fZHalfLength= rhs.fZHalfLength;
   fInnerStereo= rhs.fInnerStereo; fOuterStereo= rhs.fOuterStereo;
   fTanInnerStereo= rhs.fTanInnerStereo; fTanOuterStereo= rhs.fTanOuterStereo;
   fKappa= rhs.fKappa; fInnerRadius2= rhs.fInnerRadius2; 
   fOuterRadius2= rhs.fOuterRadius2; fTanInnerStereo2= rhs.fTanInnerStereo2;
   fTanOuterStereo2= rhs.fTanOuterStereo2;
   fLowerEndcap= fUpperEndcap= fLatterTwisted= fFormerTwisted= 0;
   fInnerHype= fOuterHype= 0;
   fCubicVolume= rhs.fCubicVolume; fSurfaceArea= rhs.fSurfaceArea;
   fLastInside= rhs.fLastInside; fLastNormal= rhs.fLastNormal;
   fLastDistanceToIn= rhs.fLastDistanceToIn;
   fLastDistanceToOut= rhs.fLastDistanceToOut;
   fLastDistanceToInWithV= rhs.fLastDistanceToInWithV;
   fLastDistanceToOutWithV= rhs.fLastDistanceToOutWithV;
 
   for (auto i=0; i<2; ++i)
   {
     fEndZ[i] = rhs.fEndZ[i];
     fEndInnerRadius[i] = rhs.fEndInnerRadius[i];
     fEndOuterRadius[i] = rhs.fEndOuterRadius[i];
     fEndPhi[i] = rhs.fEndPhi[i];
     fEndZ2[i] = rhs.fEndZ2[i];
   }
 
   CreateSurfaces();
   fRebuildPolyhedron = false;
   delete fpPolyhedron; fpPolyhedron = nullptr;
 
   return *this;
}

StreamInfo()

std::ostream & G4TwistedTubs::StreamInfo ( std::ostream &  os ) const

virtual

Implements G4VSolid.

Definition at line 843 of file G4TwistedTubs.cc.

{
  //
  // Stream object contents to an output stream
  //
  G4long oldprc = os.precision(16);
  os << "-----------------------------------------------------------\n"
     << "    *** Dump for solid - " << GetName() << " ***\n"
     << "    ===================================================\n"
     << " Solid type: G4TwistedTubs\n"
     << " Parameters: \n"
     << "    -ve end Z              : " << fEndZ[0]/mm << " mm \n"
     << "    +ve end Z              : " << fEndZ[1]/mm << " mm \n"
     << "    inner end radius(-ve z): " << fEndInnerRadius[0]/mm << " mm \n"
     << "    inner end radius(+ve z): " << fEndInnerRadius[1]/mm << " mm \n"
     << "    outer end radius(-ve z): " << fEndOuterRadius[0]/mm << " mm \n"
     << "    outer end radius(+ve z): " << fEndOuterRadius[1]/mm << " mm \n"
     << "    inner radius (z=0)     : " << fInnerRadius/mm << " mm \n"
     << "    outer radius (z=0)     : " << fOuterRadius/mm << " mm \n"
     << "    twisted angle          : " << fPhiTwist/degree << " degrees \n"
     << "    inner stereo angle     : " << fInnerStereo/degree << " degrees \n"
     << "    outer stereo angle     : " << fOuterStereo/degree << " degrees \n"
     << "    phi-width of a piece   : " << fDPhi/degree << " degrees \n"
     << "-----------------------------------------------------------\n";
  os.precision(oldprc);
 
  return os;
}

SurfaceNormal()

G4ThreeVector G4TwistedTubs::SurfaceNormal ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 428 of file G4TwistedTubs.cc.

{
   //
   // return the normal unit vector to the Hyperbolical Surface at a point 
   // p on (or nearly on) the surface
   //
   // Which of the three or four surfaces are we closest to?
   //
 
   if (fLastNormal.p == p)
   {
      return fLastNormal.vec;
   }    
   G4ThreeVector *tmpp          =
     const_cast<G4ThreeVector*>(&(fLastNormal.p));
   G4ThreeVector *tmpnormal     =
     const_cast<G4ThreeVector*>(&(fLastNormal.vec));
   G4VTwistSurface **tmpsurface =
     const_cast<G4VTwistSurface**>(fLastNormal.surface);
   tmpp->set(p.x(), p.y(), p.z());
 
   G4double      distance = kInfinity;
 
   G4VTwistSurface *surfaces[6];
   surfaces[0] = fLatterTwisted;
   surfaces[1] = fFormerTwisted;
   surfaces[2] = fInnerHype;
   surfaces[3] = fOuterHype;
   surfaces[4] = fLowerEndcap;
   surfaces[5] = fUpperEndcap;
 
   G4ThreeVector xx;
   G4ThreeVector bestxx;
   G4int besti = -1;
   for (auto i=0; i<6; ++i)
   {
      G4double tmpdistance = surfaces[i]->DistanceTo(p, xx);
      if (tmpdistance < distance)
      {
         distance = tmpdistance;
         bestxx = xx;
         besti = i; 
      }
   }
 
   tmpsurface[0] = surfaces[besti];
   *tmpnormal = tmpsurface[0]->GetNormal(bestxx, true);
   
   return fLastNormal.vec;
}

Referenced by DistanceToIn(), and DistanceToOut().

---

The documentation for this class was generated from the following files:

• G4TwistedTubs.hh
• G4TwistedTubs.cc