G4SubtractionSolid Class Reference

G4SubtractionSolid is a solid describing the Boolean subtraction of two solids. More...

#include <G4SubtractionSolid.hh>

Inheritance diagram for G4SubtractionSolid:

Public Member Functions
	G4SubtractionSolid (const G4String &pName, G4VSolid *pSolidA, G4VSolid *pSolidB)
	G4SubtractionSolid (const G4String &pName, G4VSolid *pSolidA, G4VSolid *pSolidB, G4RotationMatrix *rotMatrix, const G4ThreeVector &transVector)
	G4SubtractionSolid (const G4String &pName, G4VSolid *pSolidA, G4VSolid *pSolidB, const G4Transform3D &transform)
	~G4SubtractionSolid () override=default
	G4SubtractionSolid (__void__ &)
	G4SubtractionSolid (const G4SubtractionSolid &rhs)
G4SubtractionSolid &	operator= (const G4SubtractionSolid &rhs)
G4GeometryType	GetEntityType () const override
G4VSolid *	Clone () const override
void	BoundingLimits (G4ThreeVector &pMin, G4ThreeVector &pMax) const override
G4bool	CalculateExtent (const EAxis pAxis, const G4VoxelLimits &pVoxelLimit, const G4AffineTransform &pTransform, G4double &pMin, G4double &pMax) const override
EInside	Inside (const G4ThreeVector &p) const override
G4ThreeVector	SurfaceNormal (const G4ThreeVector &p) const override
G4double	DistanceToIn (const G4ThreeVector &p, const G4ThreeVector &v) const override
G4double	DistanceToIn (const G4ThreeVector &p) const override
G4double	DistanceToOut (const G4ThreeVector &p, const G4ThreeVector &v, const G4bool calcNorm=false, G4bool *validNorm=nullptr, G4ThreeVector *n=nullptr) const override
G4double	DistanceToOut (const G4ThreeVector &p) const override
void	ComputeDimensions (G4VPVParameterisation *p, const G4int n, const G4VPhysicalVolume *pRep) override
void	DescribeYourselfTo (G4VGraphicsScene &scene) const override
G4Polyhedron *	CreatePolyhedron () const override
G4double	GetCubicVolume () final
Public Member Functions inherited from G4BooleanSolid
	G4BooleanSolid (const G4String &pName, G4VSolid *pSolidA, G4VSolid *pSolidB)
	G4BooleanSolid (const G4String &pName, G4VSolid *pSolidA, G4VSolid *pSolidB, G4RotationMatrix *rotMatrix, const G4ThreeVector &transVector)
	G4BooleanSolid (const G4String &pName, G4VSolid *pSolidA, G4VSolid *pSolidB, const G4Transform3D &transform)
	~G4BooleanSolid () override
	G4BooleanSolid (__void__ &)
	G4BooleanSolid (const G4BooleanSolid &rhs)
G4BooleanSolid &	operator= (const G4BooleanSolid &rhs)
const G4VSolid *	GetConstituentSolid (G4int no) const override
G4VSolid *	GetConstituentSolid (G4int no) override
G4double	GetSurfaceArea () override
G4Polyhedron *	GetPolyhedron () const override
std::ostream &	StreamInfo (std::ostream &os) const override
G4int	GetCubVolStatistics () const
void	SetCubVolStatistics (G4int st)
G4double	GetCubVolEpsilon () const
void	SetCubVolEpsilon (G4double ep)
G4int	GetAreaStatistics () const
void	SetAreaStatistics (G4int st)
G4double	GetAreaAccuracy () const
void	SetAreaAccuracy (G4double ep)
G4ThreeVector	GetPointOnSurface () const override
G4int	GetNumOfConstituents () const override
G4bool	IsFaceted () const override
Public Member Functions inherited from G4VSolid
	G4VSolid (const G4String &name)
virtual	~G4VSolid ()
	G4VSolid (const G4VSolid &rhs)
G4VSolid &	operator= (const G4VSolid &rhs)
G4bool	operator== (const G4VSolid &s) const
G4String	GetName () const
void	SetName (const G4String &name)
G4double	GetTolerance () const
void	DumpInfo () const
virtual G4VisExtent	GetExtent () const
virtual const G4DisplacedSolid *	GetDisplacedSolidPtr () const
virtual G4DisplacedSolid *	GetDisplacedSolidPtr ()
	G4VSolid (__void__ &)
G4double	EstimateCubicVolume (G4int nStat, G4double epsilon) const
G4double	EstimateSurfaceArea (G4int nStat, G4double epsilon) const

Additional Inherited Members
Static Public Member Functions inherited from G4BooleanSolid
static G4VBooleanProcessor *	GetExternalBooleanProcessor ()
static void	SetExternalBooleanProcessor (G4VBooleanProcessor *extProcessor)
Protected Member Functions inherited from G4BooleanSolid
void	GetListOfPrimitives (std::vector< std::pair< G4VSolid *, G4Transform3D > > &, const G4Transform3D &) const
G4Polyhedron *	StackPolyhedron (HepPolyhedronProcessor &, const G4VSolid *) const
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 G4BooleanSolid
G4VSolid *	fPtrSolidA = nullptr
G4VSolid *	fPtrSolidB = nullptr
G4double	fCubicVolume = -1.0
G4double	fSurfaceArea = -1.0
Protected Attributes inherited from G4VSolid
G4double	kCarTolerance
Static Protected Attributes inherited from G4BooleanSolid
static G4VBooleanProcessor *	fExternalBoolProcessor = nullptr

Detailed Description

G4SubtractionSolid is a solid describing the Boolean subtraction of two solids.

Definition at line 50 of file G4SubtractionSolid.hh.

Constructor & Destructor Documentation

G4SubtractionSolid() [1/5]

G4SubtractionSolid::G4SubtractionSolid	(	const G4String &	pName,
		G4VSolid *	pSolidA,
		G4VSolid *	pSolidB )

Constructor of a Boolean subtraction between two solids with no displacement.

Parameters

[in]	pName	The name of the Boolean composition.
[in]	pSolidA	Pointer to the first reference solid.
[in]	pSolidB	Pointer to the second solid to form the composition.

Definition at line 60 of file G4SubtractionSolid.cc.

  : G4BooleanSolid(pName,pSolidA,pSolidB)
{
}

Referenced by Clone(), G4SubtractionSolid(), and operator=().

G4SubtractionSolid() [2/5]

G4SubtractionSolid::G4SubtractionSolid	(	const G4String &	pName,
		G4VSolid *	pSolidA,
		G4VSolid *	pSolidB,
		G4RotationMatrix *	rotMatrix,
		const G4ThreeVector &	transVector )

Constructor of a Boolean subtraction between two solids with rotation and translation, used to transform the coordinate system of the second solid to the coordinate system of the first solid.

Parameters

[in]	pName	The name of the Boolean composition.
[in]	pSolidA	Pointer to the first reference solid.
[in]	pSolidB	Pointer to the second solid to form the composition.
[in]	rotMatrix	Pointer to the rotation vector.
[in]	transVector	The translation vector.

Definition at line 71 of file G4SubtractionSolid.cc.

  : G4BooleanSolid(pName,pSolidA,pSolidB,rotMatrix,transVector)
{
} 

G4SubtractionSolid() [3/5]

G4SubtractionSolid::G4SubtractionSolid	(	const G4String &	pName,
		G4VSolid *	pSolidA,
		G4VSolid *	pSolidB,
		const G4Transform3D &	transform )

Constructor of a Boolean subtraction between two solids with a transformation that moves the second solid from its desired position to its standard position.

Parameters

[in]	pName	The name of the Boolean composition.
[in]	pSolidA	Pointer to the first reference solid.
[in]	pSolidB	Pointer to the second solid to form the composition.
[in]	transform	The composed 3D transformation.

Definition at line 84 of file G4SubtractionSolid.cc.

  : G4BooleanSolid(pName,pSolidA,pSolidB,transform)
{
}

~G4SubtractionSolid()

G4SubtractionSolid::~G4SubtractionSolid ( )

overridedefault

Default destructor.

G4SubtractionSolid() [4/5]

G4SubtractionSolid::G4SubtractionSolid

(

__void__ &

a

)

Fake default constructor for usage restricted to direct object persistency for clients requiring preallocation of memory for persistifiable objects.

Definition at line 97 of file G4SubtractionSolid.cc.

  : G4BooleanSolid(a)
{
}

G4SubtractionSolid() [5/5]

G4SubtractionSolid::G4SubtractionSolid ( const G4SubtractionSolid & rhs )

default

Copy constructor and assignment operator.

Member Function Documentation

BoundingLimits()

void G4SubtractionSolid::BoundingLimits ( G4ThreeVector & pMin, G4ThreeVector & pMax ) const

overridevirtual

Computes the bounding limits of the solid.

Parameters

[out]	pMin	The minimum bounding limit point.
[out]	pMax	The maximum bounding limit point.

Reimplemented from G4VSolid.

Definition at line 131 of file G4SubtractionSolid.cc.

{
  // Since it is unclear how the shape of the first solid will be changed
  // after subtraction, just return its original bounding box.
  //
  fPtrSolidA->BoundingLimits(pMin,pMax);
 
  // 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("G4SubtractionSolid::BoundingLimits()", "GeomMgt0001",
                JustWarning, message);
    DumpInfo();
  }
}

CalculateExtent()

G4bool G4SubtractionSolid::CalculateExtent ( const EAxis pAxis, const G4VoxelLimits & pVoxelLimit, const G4AffineTransform & pTransform, G4double & pMin, G4double & pMax ) const

overridevirtual

Calculates the minimum and maximum extent of the solid, when under the specified transform, and within the specified limits.

Parameters

[in]	pAxis	The axis along which compute the extent.
[in]	pVoxelLimit	The limiting space dictated by voxels.
[in]	pTransform	The internal transformation applied to the solid.
[out]	pMin	The minimum extent value.
[out]	pMax	The maximum extent value.

Returns

True if the solid is intersected by the extent region.

Implements G4VSolid.

Definition at line 159 of file G4SubtractionSolid.cc.

{
  // Since we cannot be sure how much the second solid subtracts 
  // from the first, we must use the first solid's extent!
 
  return fPtrSolidA->CalculateExtent( pAxis, pVoxelLimit, 
                                      pTransform, pMin, pMax );
}

Clone()

G4VSolid * G4SubtractionSolid::Clone ( ) const

overridevirtual

Makes a clone of the object for use in multi-treading.

Returns

A pointer to the new cloned allocated solid.

Reimplemented from G4VSolid.

Definition at line 529 of file G4SubtractionSolid.cc.

{
  return new G4SubtractionSolid(*this);
}

ComputeDimensions()

void G4SubtractionSolid::ComputeDimensions ( G4VPVParameterisation * p, const G4int n, const G4VPhysicalVolume * pRep )

overridevirtual

Throws an exception as paramterisations are not allowed for these solids.

Reimplemented from G4VSolid.

Definition at line 539 of file G4SubtractionSolid.cc.

{
  DumpInfo();
  G4Exception("G4SubtractionSolid::ComputeDimensions()",
              "GeomSolids0001", FatalException,
              "Method not applicable in this context!");
}

CreatePolyhedron()

G4Polyhedron * G4SubtractionSolid::CreatePolyhedron ( ) const

overridevirtual

Creates a Polyhedron used for Visualisation. It is the caller's responsibility to delete it. A null pointer means "not created".

Reimplemented from G4VSolid.

Definition at line 563 of file G4SubtractionSolid.cc.

{
  if (fExternalBoolProcessor == nullptr)
  {
    HepPolyhedronProcessor processor;
    // Stack components and components of components recursively
    // See G4BooleanSolid::StackPolyhedron
    G4Polyhedron* top = StackPolyhedron(processor, this);
    auto result = new G4Polyhedron(*top);
    if (processor.execute(*result))
    {
      return result;
    }
    return nullptr;
  }
  else
  {
    return fExternalBoolProcessor->Process(this);
  }
}

DescribeYourselfTo()

void G4SubtractionSolid::DescribeYourselfTo ( G4VGraphicsScene & scene ) const

overridevirtual

Methods for creating graphical representations (i.e. for visualisation).

Implements G4VSolid.

Definition at line 554 of file G4SubtractionSolid.cc.

{
  scene.AddSolid (*this);
}

DistanceToIn() [1/2]

G4double G4SubtractionSolid::DistanceToIn ( const G4ThreeVector & p ) const

overridevirtual

Calculates the safety distance to the nearest surface of a shape from an outside point. The distance can be an underestimate.

Implements G4VSolid.

Definition at line 401 of file G4SubtractionSolid.cc.

{
  G4double dist = 0.0;
 
#ifdef G4BOOLDEBUG
  if( Inside(p) == kInside )
  {
    G4cout << "WARNING - Invalid call in "
           << "G4SubtractionSolid::DistanceToIn(p)" << G4endl
           << "  Point p is inside !" << G4endl;
    G4cout << "          p = " << p << G4endl;
    G4cerr << "WARNING - Invalid call in "
           << "G4SubtractionSolid::DistanceToIn(p)" << G4endl
           << "  Point p is inside !" << G4endl;
    G4cerr << "          p = " << p << G4endl;
  }
#endif
 
  if( ( fPtrSolidA->Inside(p) != kOutside) &&   // case 1
      ( fPtrSolidB->Inside(p) != kOutside)    )
  {
    dist = fPtrSolidB->DistanceToOut(p);
  }
  else
  {
    dist = fPtrSolidA->DistanceToIn(p); 
  }
  
  return dist; 
}

DistanceToIn() [2/2]

G4double G4SubtractionSolid::DistanceToIn ( const G4ThreeVector & p, const G4ThreeVector & v ) const

overridevirtual

Returns the distance along the normalised vector "v" to the shape, from the point at offset "p". If there is no intersection, return kInfinity. The first intersection resulting from leaving a surface/volume is discarded. Hence, it is tolerant of points on the surface of the shape.

Implements G4VSolid.

Definition at line 263 of file G4SubtractionSolid.cc.

{
  G4double dist = 0.0, dist2 = 0.0, disTmp = 0.0;
    
#ifdef G4BOOLDEBUG
  if( Inside(p) == kInside )
  {
    G4cout << "WARNING - Invalid call in "
           << "G4SubtractionSolid::DistanceToIn(p,v)" << G4endl
           << "  Point p is inside !" << G4endl;
    G4cout << "          p = " << p << G4endl;
    G4cout << "          v = " << v << G4endl;
    G4cerr << "WARNING - Invalid call in "
           << "G4SubtractionSolid::DistanceToIn(p,v)" << G4endl
           << "  Point p is inside !" << G4endl;
    G4cerr << "          p = " << p << G4endl;
    G4cerr << "          v = " << v << G4endl;
  }
#endif
 
    // if( // ( fPtrSolidA->Inside(p) != kOutside) &&  // case1:p in both A&B 
    if ( fPtrSolidB->Inside(p) != kOutside )   // start: out of B
    {
      dist = fPtrSolidB->DistanceToOut(p,v) ; // ,calcNorm,validNorm,n) ;
      
      if( fPtrSolidA->Inside(p+dist*v) != kInside )
      {
        G4int count1=0;
        do   // Loop checking, 13.08.2015, G.Cosmo
        {
          disTmp = fPtrSolidA->DistanceToIn(p+dist*v,v) ;
 
          if(disTmp == kInfinity)
          {  
            return kInfinity ;
          }
          dist += disTmp ;
 
          if( Inside(p+dist*v) == kOutside )
          {
            disTmp = fPtrSolidB->DistanceToOut(p+dist*v,v) ;
            dist2 = dist+disTmp;
            if (dist == dist2)  { return dist; }   // no progress
            dist = dist2 ;
            ++count1;
            if( count1 > 1000 )  // Infinite loop detected
            {
              G4String nameB = fPtrSolidB->GetName();
              if(fPtrSolidB->GetEntityType()=="G4DisplacedSolid")
              {
                nameB = (dynamic_cast<G4DisplacedSolid*>(fPtrSolidB))
                        ->GetConstituentMovedSolid()->GetName();
              }
              std::ostringstream message;
              message << "Illegal condition caused by solids: "
                      << fPtrSolidA->GetName() << " and " << nameB << G4endl;
              message.precision(16);
              message << "Looping detected in point " << p+dist*v
                      << ", from original point " << p
                      << " and direction " << v << G4endl
                      << "Computed candidate distance: " << dist << "*mm. ";
              message.precision(6);
              DumpInfo();
              G4Exception("G4SubtractionSolid::DistanceToIn(p,v)",
                          "GeomSolids1001", JustWarning, message,
                          "Returning candidate distance.");
              return dist;
            }
          }    
        }
        while( Inside(p+dist*v) == kOutside ) ;
      }
    }
    else // p outside A, start in A
    {
      dist = fPtrSolidA->DistanceToIn(p,v) ;
 
      if( dist == kInfinity ) // past A, hence past A\B
      {
        return kInfinity ;
      }
      
      G4int count2=0;
      while( Inside(p+dist*v) == kOutside )  // pushing loop
      {
        disTmp = fPtrSolidB->DistanceToOut(p+dist*v,v) ;
        dist += disTmp ;
 
        if( Inside(p+dist*v) == kOutside )
        { 
          disTmp = fPtrSolidA->DistanceToIn(p+dist*v,v) ;
 
          if(disTmp == kInfinity) // past A, hence past A\B
          {  
            return kInfinity ;
          }                 
          dist2 = dist+disTmp;
          if (dist == dist2)  { return dist; }   // no progress
          dist = dist2 ;
          ++count2;
          if( count2 > 1000 )  // Infinite loop detected
          {
            G4String nameB = fPtrSolidB->GetName();
            if(fPtrSolidB->GetEntityType()=="G4DisplacedSolid")
            {
              nameB = (dynamic_cast<G4DisplacedSolid*>(fPtrSolidB))
                      ->GetConstituentMovedSolid()->GetName();
            }
            std::ostringstream message;
            message << "Illegal condition caused by solids: "
                    << fPtrSolidA->GetName() << " and " << nameB << G4endl;
            message.precision(16);
            message << "Looping detected in point " << p+dist*v
                    << ", from original point " << p
                    << " and direction " << v << G4endl
                    << "Computed candidate distance: " << dist << "*mm. ";
            message.precision(6);
            DumpInfo();
            G4Exception("G4SubtractionSolid::DistanceToIn(p,v)",
                        "GeomSolids1001", JustWarning, message,
                        "Returning candidate distance.");
            return dist;
          }
        }
      }    // Loop checking, 13.08.2015, G.Cosmo
    }
  
  return dist ;
}

DistanceToOut() [1/2]

G4double G4SubtractionSolid::DistanceToOut ( const G4ThreeVector & p ) const

overridevirtual

Calculates the safety distance to the nearest surface of a shape from an inside point "p". The distance can be an underestimate.

Implements G4VSolid.

Definition at line 491 of file G4SubtractionSolid.cc.

{
  G4double dist=0.0;
 
  if( Inside(p) == kOutside )
  { 
#ifdef G4BOOLDEBUG
    G4cout << "WARNING - Invalid call in "
           << "G4SubtractionSolid::DistanceToOut(p)" << G4endl
           << "  Point p is outside" << G4endl;
    G4cout << "          p = " << p << G4endl;
    G4cerr << "WARNING - Invalid call in "
           << "G4SubtractionSolid::DistanceToOut(p)" << G4endl
           << "  Point p is outside" << G4endl;
    G4cerr << "          p = " << p << G4endl;
#endif
  }
  else
  {
     dist= std::min(fPtrSolidA->DistanceToOut(p),
                      fPtrSolidB->DistanceToIn(p) ) ; 
  }
  return dist; 
}

DistanceToOut() [2/2]

G4double G4SubtractionSolid::DistanceToOut ( const G4ThreeVector & p, const G4ThreeVector & v, const G4bool calcNorm = false, G4bool * validNorm = nullptr, G4ThreeVector * n = nullptr ) const

overridevirtual

Returns the distance along the normalised vector "v" to the shape, from a point at an offset "p" inside or on the surface of the shape. Intersections with surfaces, when the point is < Tolerance/2 from a surface must be ignored. Must be called as solid.DistanceToOut(p,v) or by specifying all the parameters.

Parameters

[in]	p	The reference point in space.
[in]	v	The normalised direction.
[in]	calcNorm	Flag to enable the normal computation or not.
[out]	validNorm	Set to true if the solid lies entirely behind or on the exiting surface (calcNorm must be true, otherwise it is unused).
[out]	n	The exiting outwards normal vector (undefined Magnitude). (calcNorm must be true, otherwise it is unused).

Returns

The distance value to exit the volume.

Implements G4VSolid.

Definition at line 437 of file G4SubtractionSolid.cc.

{
#ifdef G4BOOLDEBUG
    if( Inside(p) == kOutside )
    {
      G4cout << "Position:"  << G4endl << G4endl;
      G4cout << "p.x() = "   << p.x()/mm << " mm" << G4endl;
      G4cout << "p.y() = "   << p.y()/mm << " mm" << G4endl;
      G4cout << "p.z() = "   << p.z()/mm << " mm" << G4endl << G4endl;
      G4cout << "Direction:" << G4endl << G4endl;
      G4cout << "v.x() = "   << v.x() << G4endl;
      G4cout << "v.y() = "   << v.y() << G4endl;
      G4cout << "v.z() = "   << v.z() << G4endl << G4endl;
      G4cout << "WARNING - Invalid call in "
             << "G4SubtractionSolid::DistanceToOut(p,v)" << G4endl
             << "  Point p is outside !" << G4endl;
      G4cout << "          p = " << p << G4endl;
      G4cout << "          v = " << v << G4endl;
      G4cerr << "WARNING - Invalid call in "
             << "G4SubtractionSolid::DistanceToOut(p,v)" << G4endl
             << "  Point p is outside !" << G4endl;
      G4cerr << "          p = " << p << G4endl;
      G4cerr << "          v = " << v << G4endl;
    }
#endif
 
    G4double distout;
    G4double distA = fPtrSolidA->DistanceToOut(p,v,calcNorm,validNorm,n) ;
    G4double distB = fPtrSolidB->DistanceToIn(p,v) ;
    if(distB < distA)
    {
      if(calcNorm)
      {
        *n = -(fPtrSolidB->SurfaceNormal(p+distB*v)) ;
        *validNorm = false ;
      }
      distout= distB ;
    }
    else
    {
      distout= distA ; 
    } 
    return distout;
}

GetCubicVolume()

G4double G4SubtractionSolid::GetCubicVolume ( )

finalvirtual

Returns an estimate of the capacity of the Boolean composition.

Reimplemented from G4BooleanSolid.

Definition at line 589 of file G4SubtractionSolid.cc.

{
  if( fCubicVolume >= 0. )
  {
    return fCubicVolume;
  }
  G4RecursiveAutoLock l(&subMutex);
  G4ThreeVector bminA, bmaxA, bminB, bmaxB;
  fPtrSolidA->BoundingLimits(bminA, bmaxA);
  fPtrSolidB->BoundingLimits(bminB, bmaxB);
  G4bool noIntersection =
     bminA.x() >= bmaxB.x() || bminA.y() >= bmaxB.y() || bminA.z() >= bmaxB.z() ||
     bminB.x() >= bmaxA.x() || bminB.y() >= bmaxA.y() || bminB.z() >= bmaxA.z();
 
  if (noIntersection)
  {
    fCubicVolume = fPtrSolidA->GetCubicVolume();
  }
  else
  {
    if (GetNumOfConstituents() > 10)
    {
      fCubicVolume = G4BooleanSolid::GetCubicVolume();
    }
    else
    {
      G4IntersectionSolid intersectVol("Temporary-Intersection-for-Subtraction",
                                        fPtrSolidA, fPtrSolidB);
      intersectVol.SetCubVolStatistics(GetCubVolStatistics());
      intersectVol.SetCubVolEpsilon(GetCubVolEpsilon());
 
      G4double cubVolumeA = fPtrSolidA->GetCubicVolume();
      fCubicVolume = cubVolumeA - intersectVol.GetCubicVolume();
      if (fCubicVolume < 0.01*cubVolumeA)
      {
        fCubicVolume = G4BooleanSolid::GetCubicVolume();
      }
    }
  }
  l.unlock();
  return fCubicVolume;
}

GetEntityType()

G4GeometryType G4SubtractionSolid::GetEntityType ( ) const

overridevirtual

Returns the type ID, "G4SubtractionSolid" of the solid.

Reimplemented from G4BooleanSolid.

Definition at line 520 of file G4SubtractionSolid.cc.

{
  return {"G4SubtractionSolid"};
}

Inside()

EInside G4SubtractionSolid::Inside ( const G4ThreeVector & p ) const

overridevirtual

Returns if the given point "p" is inside or not the solid.

Implements G4VSolid.

Definition at line 176 of file G4SubtractionSolid.cc.

{
  EInside positionA = fPtrSolidA->Inside(p);
  if (positionA == kOutside) { return positionA; } // outside A
 
  EInside positionB = fPtrSolidB->Inside(p);
  if (positionB == kOutside) { return positionA; }
 
  if (positionB == kInside) { return kOutside; }
  if (positionA == kInside) { return kSurface; } // surface B
 
  // Point is on both surfaces
  //
  static const G4double rtol = 1000*kCarTolerance;
 
  return ((fPtrSolidA->SurfaceNormal(p) -
           fPtrSolidB->SurfaceNormal(p)).mag2() > rtol) ? kSurface : kOutside;
}

Referenced by DistanceToIn(), DistanceToIn(), DistanceToOut(), DistanceToOut(), and SurfaceNormal().

operator=()

G4SubtractionSolid & G4SubtractionSolid::operator=

(

const G4SubtractionSolid &

rhs

)

Definition at line 113 of file G4SubtractionSolid.cc.

{
  // Check assignment to self
  //
  if (this == &rhs)  { return *this; }
 
  // Copy base class data
  //
  G4BooleanSolid::operator=(rhs);
 
  return *this;
}  

SurfaceNormal()

G4ThreeVector G4SubtractionSolid::SurfaceNormal ( const G4ThreeVector & p ) const

overridevirtual

Returns the outwards pointing unit normal of the shape for the surface closest to the point at offset "p".

Implements G4VSolid.

Definition at line 200 of file G4SubtractionSolid.cc.

{
  G4ThreeVector normal;
 
  EInside InsideA = fPtrSolidA->Inside(p);
  EInside InsideB = fPtrSolidB->Inside(p); 
 
  if( InsideA == kOutside )
  {
#ifdef G4BOOLDEBUG
    G4cout << "WARNING - Invalid call [1] in "
           << "G4SubtractionSolid::SurfaceNormal(p)" << G4endl
           << "  Point p is outside !" << G4endl;
    G4cout << "          p = " << p << G4endl;
    G4cerr << "WARNING - Invalid call [1] in "
           << "G4SubtractionSolid::SurfaceNormal(p)" << G4endl
           << "  Point p is outside !" << G4endl;
    G4cerr << "          p = " << p << G4endl;
#endif
    normal = fPtrSolidA->SurfaceNormal(p) ;
  }
  else if( InsideA == kSurface && 
           InsideB != kInside      ) 
  {
    normal = fPtrSolidA->SurfaceNormal(p) ;
  }
  else if( InsideA == kInside && 
           InsideB != kOutside    )
  {
    normal = -fPtrSolidB->SurfaceNormal(p) ;
  }
  else 
  {
    if ( fPtrSolidA->DistanceToOut(p) <= fPtrSolidB->DistanceToIn(p) )
    {
      normal = fPtrSolidA->SurfaceNormal(p) ;
    }
    else
    {
      normal = -fPtrSolidB->SurfaceNormal(p) ;
    }
#ifdef G4BOOLDEBUG
    if(Inside(p) == kInside)
    {
      G4cout << "WARNING - Invalid call [2] in "
             << "G4SubtractionSolid::SurfaceNormal(p)" << G4endl
             << "  Point p is inside !" << G4endl;
      G4cout << "          p = " << p << G4endl;
      G4cerr << "WARNING - Invalid call [2] in "
             << "G4SubtractionSolid::SurfaceNormal(p)" << G4endl
             << "  Point p is inside !" << G4endl;
      G4cerr << "          p = " << p << G4endl;
    }
#endif
  }
  return normal;
}

---

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

• G4SubtractionSolid.hh
• G4SubtractionSolid.cc