G4Tubs Class Reference

#include <G4Tubs.hh>

Inheritance diagram for G4Tubs:

Collaboration diagram for G4Tubs:

Public Member Functions
	G4Tubs (const G4String &pName, G4double pRMin, G4double pRMax, G4double pDz, G4double pSPhi, G4double pDPhi)
virtual	~G4Tubs ()
G4double	GetInnerRadius () const
G4double	GetOuterRadius () const
G4double	GetZHalfLength () const
G4double	GetStartPhiAngle () const
G4double	GetDeltaPhiAngle () const
void	SetInnerRadius (G4double newRMin)
void	SetOuterRadius (G4double newRMax)
void	SetZHalfLength (G4double newDz)
void	SetStartPhiAngle (G4double newSPhi, G4bool trig=true)
void	SetDeltaPhiAngle (G4double newDPhi)
G4double	GetCubicVolume ()
G4double	GetSurfaceArea ()
void	ComputeDimensions (G4VPVParameterisation *p, const G4int n, const G4VPhysicalVolume *pRep)
G4bool	CalculateExtent (const EAxis pAxis, const G4VoxelLimits &pVoxelLimit, const G4AffineTransform &pTransform, G4double &pmin, G4double &pmax) const
EInside	Inside (const G4ThreeVector &p) const
G4ThreeVector	SurfaceNormal (const G4ThreeVector &p) 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=G4bool(false), G4bool *validNorm=0, G4ThreeVector *n=0) const
G4double	DistanceToOut (const G4ThreeVector &p) const
G4GeometryType	GetEntityType () const
G4ThreeVector	GetPointOnSurface () const
G4VSolid *	Clone () const
std::ostream &	StreamInfo (std::ostream &os) const
void	DescribeYourselfTo (G4VGraphicsScene &scene) const
G4Polyhedron *	CreatePolyhedron () const
	G4Tubs (__void__ &)
	G4Tubs (const G4Tubs &rhs)
G4Tubs &	operator= (const G4Tubs &rhs)
G4double	GetRMin () const
G4double	GetRMax () const
G4double	GetDz () const
G4double	GetSPhi () const
G4double	GetDPhi () const
Public Member Functions inherited from G4CSGSolid
	G4CSGSolid (const G4String &pName)
virtual	~G4CSGSolid ()
virtual G4Polyhedron *	GetPolyhedron () const
	G4CSGSolid (__void__ &)
	G4CSGSolid (const G4CSGSolid &rhs)
G4CSGSolid &	operator= (const G4CSGSolid &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
void	DumpInfo () const
virtual G4VisExtent	GetExtent () 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

Protected Types
enum	ESide {   kNull, kRMin, kRMax, kSPhi,   kEPhi, kPZ, kMZ }
enum	ENorm {   kNRMin, kNRMax, kNSPhi, kNEPhi,   kNZ }

Protected Member Functions
G4ThreeVectorList *	CreateRotatedVertices (const G4AffineTransform &pTransform) const
void	Initialize ()
void	CheckSPhiAngle (G4double sPhi)
void	CheckDPhiAngle (G4double dPhi)
void	CheckPhiAngles (G4double sPhi, G4double dPhi)
void	InitializeTrigonometry ()
virtual G4ThreeVector	ApproxSurfaceNormal (const G4ThreeVector &p) const
Protected Member Functions inherited from G4CSGSolid
G4double	GetRadiusInRing (G4double rmin, G4double rmax) 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
G4double	kRadTolerance
G4double	kAngTolerance
G4double	fRMin
G4double	fRMax
G4double	fDz
G4double	fSPhi
G4double	fDPhi
G4double	sinCPhi
G4double	cosCPhi
G4double	cosHDPhiOT
G4double	cosHDPhiIT
G4double	sinSPhi
G4double	cosSPhi
G4double	sinEPhi
G4double	cosEPhi
G4bool	fPhiFullTube
G4double	halfCarTolerance
G4double	halfRadTolerance
G4double	halfAngTolerance
Protected Attributes inherited from G4CSGSolid
G4double	fCubicVolume
G4double	fSurfaceArea
G4bool	fRebuildPolyhedron
G4Polyhedron *	fpPolyhedron
Protected Attributes inherited from G4VSolid
G4double	kCarTolerance

Detailed Description

Definition at line 85 of file G4Tubs.hh.

Member Enumeration Documentation

ENorm

enum G4Tubs::ENorm

protected

Enumerator
kNRMin
kNRMax
kNSPhi
kNEPhi
kNZ

Definition at line 211 of file G4Tubs.hh.

{kNRMin,kNRMax,kNSPhi,kNEPhi,kNZ};

ESide

enum G4Tubs::ESide

protected

Enumerator
kNull
kRMin
kRMax
kSPhi
kEPhi
kPZ
kMZ

Definition at line 207 of file G4Tubs.hh.

{kNull,kRMin,kRMax,kSPhi,kEPhi,kPZ,kMZ};

Constructor & Destructor Documentation

G4Tubs() [1/3]

G4Tubs::G4Tubs	(	const G4String &	pName,
		G4double	pRMin,
		G4double	pRMax,
		G4double	pDz,
		G4double	pSPhi,
		G4double	pDPhi
	)

Definition at line 85 of file G4Tubs.cc.

  : G4CSGSolid(pName), fRMin(pRMin), fRMax(pRMax), fDz(pDz), fSPhi(0), fDPhi(0)
{

  kRadTolerance = G4GeometryTolerance::GetInstance()->GetRadialTolerance();
  kAngTolerance = G4GeometryTolerance::GetInstance()->GetAngularTolerance();

  halfCarTolerance=kCarTolerance*0.5;
  halfRadTolerance=kRadTolerance*0.5;
  halfAngTolerance=kAngTolerance*0.5;

  if (pDz<=0) // Check z-len
  {
    std::ostringstream message;
    message << "Negative Z half-length (" << pDz << ") in solid: " << GetName();
    G4Exception("G4Tubs::G4Tubs()", "GeomSolids0002", FatalException, message);
  }
  if ( (pRMin >= pRMax) || (pRMin < 0) ) // Check radii
  {
    std::ostringstream message;
    message << "Invalid values for radii in solid: " << GetName()
            << G4endl
            << "        pRMin = " << pRMin << ", pRMax = " << pRMax;
    G4Exception("G4Tubs::G4Tubs()", "GeomSolids0002", FatalException, message);
  }

  // Check angles
  //
  CheckPhiAngles(pSPhi, pDPhi);
}

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~G4Tubs()

G4Tubs::~G4Tubs ( )

virtual

Definition at line 138 of file G4Tubs.cc.

{
}

G4Tubs() [2/3]

G4Tubs::G4Tubs

(

__void__ &

a

)

Definition at line 124 of file G4Tubs.cc.

  : G4CSGSolid(a), kRadTolerance(0.), kAngTolerance(0.),
    fRMin(0.), fRMax(0.), fDz(0.), fSPhi(0.), fDPhi(0.),
    sinCPhi(0.), cosCPhi(0.), cosHDPhiOT(0.), cosHDPhiIT(0.),
    sinSPhi(0.), cosSPhi(0.), sinEPhi(0.), cosEPhi(0.),
    fPhiFullTube(false), halfCarTolerance(0.), halfRadTolerance(0.),
    halfAngTolerance(0.)
{
}

G4Tubs() [3/3]

G4Tubs::G4Tubs

(

const G4Tubs &

rhs

)

Definition at line 146 of file G4Tubs.cc.

  : G4CSGSolid(rhs),
    kRadTolerance(rhs.kRadTolerance), kAngTolerance(rhs.kAngTolerance),
    fRMin(rhs.fRMin), fRMax(rhs.fRMax), fDz(rhs.fDz),
    fSPhi(rhs.fSPhi), fDPhi(rhs.fDPhi),
    sinCPhi(rhs.sinCPhi), cosCPhi(rhs.cosCPhi),
    cosHDPhiOT(rhs.cosHDPhiOT), cosHDPhiIT(rhs.cosHDPhiIT),
    sinSPhi(rhs.sinSPhi), cosSPhi(rhs.cosSPhi),
    sinEPhi(rhs.sinEPhi), cosEPhi(rhs.cosEPhi), fPhiFullTube(rhs.fPhiFullTube),
    halfCarTolerance(rhs.halfCarTolerance),
    halfRadTolerance(rhs.halfRadTolerance),
    halfAngTolerance(rhs.halfAngTolerance)
{
}

Member Function Documentation

ApproxSurfaceNormal()

G4ThreeVector G4Tubs::ApproxSurfaceNormal ( const G4ThreeVector &  p ) const

protectedvirtual

Definition at line 680 of file G4Tubs.cc.

{
  ENorm side ;
  G4ThreeVector norm ;
  G4double rho, phi ;
  G4double distZ, distRMin, distRMax, distSPhi, distEPhi, distMin ;

  rho = std::sqrt(p.x()*p.x() + p.y()*p.y()) ;

  distRMin = std::fabs(rho - fRMin) ;
  distRMax = std::fabs(rho - fRMax) ;
  distZ    = std::fabs(std::fabs(p.z()) - fDz) ;

  if (distRMin < distRMax) // First minimum
  {
    if ( distZ < distRMin )
    {
       distMin = distZ ;
       side    = kNZ ;
    }
    else
    {
      distMin = distRMin ;
      side    = kNRMin   ;
    }
  }
  else
  {
    if ( distZ < distRMax )
    {
      distMin = distZ ;
      side    = kNZ   ;
    }
    else
    {
      distMin = distRMax ;
      side    = kNRMax   ;
    }
  }   
  if (!fPhiFullTube  &&  rho ) // Protected against (0,0,z) 
  {
    phi = std::atan2(p.y(),p.x()) ;

    if ( phi < 0 )  { phi += twopi; }

    if ( fSPhi < 0 )
    {
      distSPhi = std::fabs(phi - (fSPhi + twopi))*rho ;
    }
    else
    {
      distSPhi = std::fabs(phi - fSPhi)*rho ;
    }
    distEPhi = std::fabs(phi - fSPhi - fDPhi)*rho ;
                                      
    if (distSPhi < distEPhi) // Find new minimum
    {
      if ( distSPhi < distMin )
      {
        side = kNSPhi ;
      }
    }
    else
    {
      if ( distEPhi < distMin )
      {
        side = kNEPhi ;
      }
    }
  }    
  switch ( side )
  {
    case kNRMin : // Inner radius
    {                      
      norm = G4ThreeVector(-p.x()/rho, -p.y()/rho, 0) ;
      break ;
    }
    case kNRMax : // Outer radius
    {                  
      norm = G4ThreeVector(p.x()/rho, p.y()/rho, 0) ;
      break ;
    }
    case kNZ :    // + or - dz
    {                              
      if ( p.z() > 0 )  { norm = G4ThreeVector(0,0,1) ; }
      else              { norm = G4ThreeVector(0,0,-1); }
      break ;
    }
    case kNSPhi:
    {
      norm = G4ThreeVector(std::sin(fSPhi), -std::cos(fSPhi), 0) ;
      break ;
    }
    case kNEPhi:
    {
      norm = G4ThreeVector(-std::sin(fSPhi+fDPhi), std::cos(fSPhi+fDPhi), 0) ;
      break;
    }
    default:      // Should never reach this case ...
    {
      DumpInfo();
      G4Exception("G4Tubs::ApproxSurfaceNormal()",
                  "GeomSolids1002", JustWarning,
                  "Undefined side for valid surface normal to solid.");
      break ;
    }    
  }                
  return norm;
}

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CalculateExtent()

G4bool G4Tubs::CalculateExtent ( const EAxis  pAxis, const G4VoxelLimits &  pVoxelLimit, const G4AffineTransform &  pTransform, G4double &  pmin, G4double &  pmax  ) const

virtual

Implements G4VSolid.

Definition at line 208 of file G4Tubs.cc.

{

  if ( (!pTransform.IsRotated()) && (fDPhi == twopi) && (fRMin == 0) )
  {
    // Special case handling for unrotated solid tubes
    // Compute x/y/z mins and maxs fro bounding box respecting limits,
    // with early returns if outside limits. Then switch() on pAxis,
    // and compute exact x and y limit for x/y case
      
    G4double xoffset, xMin, xMax;
    G4double yoffset, yMin, yMax;
    G4double zoffset, zMin, zMax;

    G4double diff1, diff2, maxDiff, newMin, newMax;
    G4double xoff1, xoff2, yoff1, yoff2, delta;

    xoffset = pTransform.NetTranslation().x();
    xMin = xoffset - fRMax;
    xMax = xoffset + fRMax;

    if (pVoxelLimit.IsXLimited())
    {
      if ( (xMin > pVoxelLimit.GetMaxXExtent())
        || (xMax < pVoxelLimit.GetMinXExtent()) )
      {
        return false;
      }
      else
      {
        if (xMin < pVoxelLimit.GetMinXExtent())
        {
          xMin = pVoxelLimit.GetMinXExtent();
        }
        if (xMax > pVoxelLimit.GetMaxXExtent())
        {
          xMax = pVoxelLimit.GetMaxXExtent();
        }
      }
    }
    yoffset = pTransform.NetTranslation().y();
    yMin    = yoffset - fRMax;
    yMax    = yoffset + fRMax;

    if ( pVoxelLimit.IsYLimited() )
    {
      if ( (yMin > pVoxelLimit.GetMaxYExtent())
        || (yMax < pVoxelLimit.GetMinYExtent()) )
      {
        return false;
      }
      else
      {
        if (yMin < pVoxelLimit.GetMinYExtent())
        {
          yMin = pVoxelLimit.GetMinYExtent();
        }
        if (yMax > pVoxelLimit.GetMaxYExtent())
        {
          yMax=pVoxelLimit.GetMaxYExtent();
        }
      }
    }
    zoffset = pTransform.NetTranslation().z();
    zMin    = zoffset - fDz;
    zMax    = zoffset + fDz;

    if ( pVoxelLimit.IsZLimited() )
    {
      if ( (zMin > pVoxelLimit.GetMaxZExtent())
        || (zMax < pVoxelLimit.GetMinZExtent()) )
      {
        return false;
      }
      else
      {
        if (zMin < pVoxelLimit.GetMinZExtent())
        {
          zMin = pVoxelLimit.GetMinZExtent();
        }
        if (zMax > pVoxelLimit.GetMaxZExtent())
        {
          zMax = pVoxelLimit.GetMaxZExtent();
        }
      }
    }
    switch ( pAxis )  // Known to cut cylinder
    {
      case kXAxis :
      {
        yoff1 = yoffset - yMin;
        yoff2 = yMax    - yoffset;

        if ( (yoff1 >= 0) && (yoff2 >= 0) ) // Y limits cross max/min x
        {                                   // => no change
          pMin = xMin;
          pMax = xMax;
        }
        else
        {
          // Y limits don't cross max/min x => compute max delta x,
          // hence new mins/maxs

          delta   = fRMax*fRMax - yoff1*yoff1;
          diff1   = (delta>0.) ? std::sqrt(delta) : 0.;
          delta   = fRMax*fRMax - yoff2*yoff2;
          diff2   = (delta>0.) ? std::sqrt(delta) : 0.;
          maxDiff = (diff1 > diff2) ? diff1:diff2;
          newMin  = xoffset - maxDiff;
          newMax  = xoffset + maxDiff;
          pMin    = (newMin < xMin) ? xMin : newMin;
          pMax    = (newMax > xMax) ? xMax : newMax;
        }    
        break;
      }
      case kYAxis :
      {
        xoff1 = xoffset - xMin;
        xoff2 = xMax - xoffset;

        if ( (xoff1 >= 0) && (xoff2 >= 0) ) // X limits cross max/min y
        {                                   // => no change
          pMin = yMin;
          pMax = yMax;
        }
        else
        {
          // X limits don't cross max/min y => compute max delta y,
          // hence new mins/maxs

          delta   = fRMax*fRMax - xoff1*xoff1;
          diff1   = (delta>0.) ? std::sqrt(delta) : 0.;
          delta   = fRMax*fRMax - xoff2*xoff2;
          diff2   = (delta>0.) ? std::sqrt(delta) : 0.;
          maxDiff = (diff1 > diff2) ? diff1 : diff2;
          newMin  = yoffset - maxDiff;
          newMax  = yoffset + maxDiff;
          pMin    = (newMin < yMin) ? yMin : newMin;
          pMax    = (newMax > yMax) ? yMax : newMax;
        }
        break;
      }
      case kZAxis:
      {
        pMin = zMin;
        pMax = zMax;
        break;
      }
      default:
        break;
    }
    pMin -= kCarTolerance;
    pMax += kCarTolerance;
    return true;
  }
  else // Calculate rotated vertex coordinates
  {
    G4int i, noEntries, noBetweenSections4;
    G4bool existsAfterClip = false;
    G4ThreeVectorList* vertices = CreateRotatedVertices(pTransform);

    pMin =  kInfinity;
    pMax = -kInfinity;

    noEntries = vertices->size();
    noBetweenSections4 = noEntries - 4;
    
    for ( i = 0 ; i < noEntries ; i += 4 )
    {
      ClipCrossSection(vertices, i, pVoxelLimit, pAxis, pMin, pMax);
    }
    for ( i = 0 ; i < noBetweenSections4 ; i += 4 )
    {
      ClipBetweenSections(vertices, i, pVoxelLimit, pAxis, pMin, pMax);
    }
    if ( (pMin != kInfinity) || (pMax != -kInfinity) )
    {
      existsAfterClip = true;
      pMin -= kCarTolerance; // Add 2*tolerance to avoid precision troubles
      pMax += kCarTolerance;
    }
    else
    {
      // Check for case where completely enveloping clipping volume
      // If point inside then we are confident that the solid completely
      // envelopes the clipping volume. Hence set min/max extents according
      // to clipping volume extents along the specified axis.

      G4ThreeVector clipCentre(
             (pVoxelLimit.GetMinXExtent()+pVoxelLimit.GetMaxXExtent())*0.5,
             (pVoxelLimit.GetMinYExtent()+pVoxelLimit.GetMaxYExtent())*0.5,
             (pVoxelLimit.GetMinZExtent()+pVoxelLimit.GetMaxZExtent())*0.5 );
        
      if ( Inside(pTransform.Inverse().TransformPoint(clipCentre)) != kOutside )
      {
        existsAfterClip = true;
        pMin            = pVoxelLimit.GetMinExtent(pAxis);
        pMax            = pVoxelLimit.GetMaxExtent(pAxis);
      }
    }
    delete vertices;
    return existsAfterClip;
  }
}

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CheckDPhiAngle()

void G4Tubs::CheckDPhiAngle ( G4double  dPhi )

inlineprotected

CheckPhiAngles()

void G4Tubs::CheckPhiAngles ( G4double  sPhi, G4double  dPhi  )

inlineprotected

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CheckSPhiAngle()

void G4Tubs::CheckSPhiAngle ( G4double  sPhi )

inlineprotected

Clone()

G4VSolid * G4Tubs::Clone ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 1812 of file G4Tubs.cc.

{
  return new G4Tubs(*this);
}

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ComputeDimensions()

void G4Tubs::ComputeDimensions ( G4VPVParameterisation *  p, const G4int  n, const G4VPhysicalVolume *  pRep  )

virtual

Reimplemented from G4VSolid.

Definition at line 197 of file G4Tubs.cc.

{
  p->ComputeDimensions(*this,n,pRep) ;
}

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CreatePolyhedron()

G4Polyhedron * G4Tubs::CreatePolyhedron ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 1919 of file G4Tubs.cc.

{
  return new G4PolyhedronTubs (fRMin, fRMax, fDz, fSPhi, fDPhi) ;
}

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CreateRotatedVertices()

G4ThreeVectorList * G4Tubs::CreateRotatedVertices ( const G4AffineTransform &  pTransform ) const

protected

Definition at line 1717 of file G4Tubs.cc.

{
  G4ThreeVectorList* vertices ;
  G4ThreeVector vertex0, vertex1, vertex2, vertex3 ;
  G4double meshAngle, meshRMax, crossAngle,
           cosCrossAngle, sinCrossAngle, sAngle;
  G4double rMaxX, rMaxY, rMinX, rMinY, meshRMin ;
  G4int crossSection, noCrossSections;

  // Compute no of cross-sections necessary to mesh tube
  //
  noCrossSections = G4int(fDPhi/kMeshAngleDefault) + 1 ;

  if ( noCrossSections < kMinMeshSections )
  {
    noCrossSections = kMinMeshSections ;
  }
  else if (noCrossSections>kMaxMeshSections)
  {
    noCrossSections = kMaxMeshSections ;
  }
  // noCrossSections = 4 ;

  meshAngle = fDPhi/(noCrossSections - 1) ;
  // meshAngle = fDPhi/(noCrossSections) ;

  meshRMax  = (fRMax+100*kCarTolerance)/std::cos(meshAngle*0.5) ;
  meshRMin = fRMin - 100*kCarTolerance ; 
 
  // If complete in phi, set start angle such that mesh will be at fRMax
  // on the x axis. Will give better extent calculations when not rotated.

  if (fPhiFullTube && (fSPhi == 0) )  { sAngle = -meshAngle*0.5 ; }
  else                                { sAngle =  fSPhi ; }
    
  vertices = new G4ThreeVectorList();
    
  if ( vertices )
  {
    vertices->reserve(noCrossSections*4);
    for (crossSection = 0 ; crossSection < noCrossSections ; crossSection++ )
    {
      // Compute coordinates of cross section at section crossSection

      crossAngle    = sAngle + crossSection*meshAngle ;
      cosCrossAngle = std::cos(crossAngle) ;
      sinCrossAngle = std::sin(crossAngle) ;

      rMaxX = meshRMax*cosCrossAngle ;
      rMaxY = meshRMax*sinCrossAngle ;

      if(meshRMin <= 0.0)
      {
        rMinX = 0.0 ;
        rMinY = 0.0 ;
      }
      else
      {
        rMinX = meshRMin*cosCrossAngle ;
        rMinY = meshRMin*sinCrossAngle ;
      }
      vertex0 = G4ThreeVector(rMinX,rMinY,-fDz) ;
      vertex1 = G4ThreeVector(rMaxX,rMaxY,-fDz) ;
      vertex2 = G4ThreeVector(rMaxX,rMaxY,+fDz) ;
      vertex3 = G4ThreeVector(rMinX,rMinY,+fDz) ;

      vertices->push_back(pTransform.TransformPoint(vertex0)) ;
      vertices->push_back(pTransform.TransformPoint(vertex1)) ;
      vertices->push_back(pTransform.TransformPoint(vertex2)) ;
      vertices->push_back(pTransform.TransformPoint(vertex3)) ;
    }
  }
  else
  {
    DumpInfo();
    G4Exception("G4Tubs::CreateRotatedVertices()",
                "GeomSolids0003", FatalException,
                "Error in allocation of vertices. Out of memory !");
  }
  return vertices ;
}

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DescribeYourselfTo()

void G4Tubs::DescribeYourselfTo ( G4VGraphicsScene &  scene ) const

virtual

Implements G4VSolid.

Definition at line 1914 of file G4Tubs.cc.

{
  scene.AddSolid (*this) ;
}

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DistanceToIn() [1/2]

G4double G4Tubs::DistanceToIn ( const G4ThreeVector &  p, const G4ThreeVector &  v  ) const

virtual

Implements G4VSolid.

Definition at line 812 of file G4Tubs.cc.

{
  G4double snxt = kInfinity ;      // snxt = default return value
  G4double tolORMin2, tolIRMax2 ;  // 'generous' radii squared
  G4double tolORMax2, tolIRMin2, tolODz, tolIDz ;
  const G4double dRmax = 100.*fRMax;

  // Intersection point variables
  //
  G4double Dist, sd, xi, yi, zi, rho2, inum, iden, cosPsi, Comp ;
  G4double t1, t2, t3, b, c, d ;     // Quadratic solver variables 
  
  // Calculate tolerant rmin and rmax

  if (fRMin > kRadTolerance)
  {
    tolORMin2 = (fRMin - halfRadTolerance)*(fRMin - halfRadTolerance) ;
    tolIRMin2 = (fRMin + halfRadTolerance)*(fRMin + halfRadTolerance) ;
  }
  else
  {
    tolORMin2 = 0.0 ;
    tolIRMin2 = 0.0 ;
  }
  tolORMax2 = (fRMax + halfRadTolerance)*(fRMax + halfRadTolerance) ;
  tolIRMax2 = (fRMax - halfRadTolerance)*(fRMax - halfRadTolerance) ;

  // Intersection with Z surfaces

  tolIDz = fDz - halfCarTolerance ;
  tolODz = fDz + halfCarTolerance ;

  if (std::fabs(p.z()) >= tolIDz)
  {
    if ( p.z()*v.z() < 0 )    // at +Z going in -Z or visa versa
    {
      sd = (std::fabs(p.z()) - fDz)/std::fabs(v.z()) ;  // Z intersect distance

      if(sd < 0.0)  { sd = 0.0; }

      xi   = p.x() + sd*v.x() ;                // Intersection coords
      yi   = p.y() + sd*v.y() ;
      rho2 = xi*xi + yi*yi ;

      // Check validity of intersection

      if ((tolIRMin2 <= rho2) && (rho2 <= tolIRMax2))
      {
        if (!fPhiFullTube && rho2)
        {
          // Psi = angle made with central (average) phi of shape
          //
          inum   = xi*cosCPhi + yi*sinCPhi ;
          iden   = std::sqrt(rho2) ;
          cosPsi = inum/iden ;
          if (cosPsi >= cosHDPhiIT)  { return sd ; }
        }
        else
        {
          return sd ;
        }
      }
    }
    else
    {
      if ( snxt<halfCarTolerance )  { snxt=0; }
      return snxt ;  // On/outside extent, and heading away
                     // -> cannot intersect
    }
  }

  // -> Can not intersect z surfaces
  //
  // Intersection with rmax (possible return) and rmin (must also check phi)
  //
  // Intersection point (xi,yi,zi) on line x=p.x+t*v.x etc.
  //
  // Intersects with x^2+y^2=R^2
  //
  // Hence (v.x^2+v.y^2)t^2+ 2t(p.x*v.x+p.y*v.y)+p.x^2+p.y^2-R^2=0
  //            t1                t2                t3

  t1 = 1.0 - v.z()*v.z() ;
  t2 = p.x()*v.x() + p.y()*v.y() ;
  t3 = p.x()*p.x() + p.y()*p.y() ;

  if ( t1 > 0 )        // Check not || to z axis
  {
    b = t2/t1 ;
    c = t3 - fRMax*fRMax ;
    if ((t3 >= tolORMax2) && (t2<0))   // This also handles the tangent case
    {
      // Try outer cylinder intersection
      //          c=(t3-fRMax*fRMax)/t1;

      c /= t1 ;
      d = b*b - c ;

      if (d >= 0)  // If real root
      {
        sd = c/(-b+std::sqrt(d));
        if (sd >= 0)  // If 'forwards'
        {
          if ( sd>dRmax ) // Avoid rounding errors due to precision issues on
          {               // 64 bits systems. Split long distances and recompute
            G4double fTerm = sd-std::fmod(sd,dRmax);
            sd = fTerm + DistanceToIn(p+fTerm*v,v);
          } 
          // Check z intersection
          //
          zi = p.z() + sd*v.z() ;
          if (std::fabs(zi)<=tolODz)
          {
            // Z ok. Check phi intersection if reqd
            //
            if (fPhiFullTube)
            {
              return sd ;
            }
            else
            {
              xi     = p.x() + sd*v.x() ;
              yi     = p.y() + sd*v.y() ;
              cosPsi = (xi*cosCPhi + yi*sinCPhi)/fRMax ;
              if (cosPsi >= cosHDPhiIT)  { return sd ; }
            }
          }  //  end if std::fabs(zi)
        }    //  end if (sd>=0)
      }      //  end if (d>=0)
    }        //  end if (r>=fRMax)
    else 
    {
      // Inside outer radius :
      // check not inside, and heading through tubs (-> 0 to in)

      if ((t3 > tolIRMin2) && (t2 < 0) && (std::fabs(p.z()) <= tolIDz))
      {
        // Inside both radii, delta r -ve, inside z extent

        if (!fPhiFullTube)
        {
          inum   = p.x()*cosCPhi + p.y()*sinCPhi ;
          iden   = std::sqrt(t3) ;
          cosPsi = inum/iden ;
          if (cosPsi >= cosHDPhiIT)
          {
            // In the old version, the small negative tangent for the point
            // on surface was not taken in account, and returning 0.0 ...
            // New version: check the tangent for the point on surface and 
            // if no intersection, return kInfinity, if intersection instead
            // return sd.
            //
            c = t3-fRMax*fRMax; 
            if ( c<=0.0 )
            {
              return 0.0;
            }
            else
            {
              c = c/t1 ;
              d = b*b-c;
              if ( d>=0.0 )
              {
                snxt = c/(-b+std::sqrt(d)); // using safe solution
                                            // for quadratic equation 
                if ( snxt < halfCarTolerance ) { snxt=0; }
                return snxt ;
              }      
              else
              {
                return kInfinity;
              }
            }
          } 
        }
        else
        {   
          // In the old version, the small negative tangent for the point
          // on surface was not taken in account, and returning 0.0 ...
          // New version: check the tangent for the point on surface and 
          // if no intersection, return kInfinity, if intersection instead
          // return sd.
          //
          c = t3 - fRMax*fRMax; 
          if ( c<=0.0 )
          {
            return 0.0;
          }
          else
          {
            c = c/t1 ;
            d = b*b-c;
            if ( d>=0.0 )
            {
              snxt= c/(-b+std::sqrt(d)); // using safe solution
                                         // for quadratic equation 
              if ( snxt < halfCarTolerance ) { snxt=0; }
              return snxt ;
            }      
            else
            {
              return kInfinity;
            }
          }
        } // end if   (!fPhiFullTube)
      }   // end if   (t3>tolIRMin2)
    }     // end if   (Inside Outer Radius) 
    if ( fRMin )    // Try inner cylinder intersection
    {
      c = (t3 - fRMin*fRMin)/t1 ;
      d = b*b - c ;
      if ( d >= 0.0 )  // If real root
      {
        // Always want 2nd root - we are outside and know rmax Hit was bad
        // - If on surface of rmin also need farthest root

        sd =( b > 0. )? c/(-b - std::sqrt(d)) : (-b + std::sqrt(d));
        if (sd >= -halfCarTolerance)  // check forwards
        {
          // Check z intersection
          //
          if(sd < 0.0)  { sd = 0.0; }
          if ( sd>dRmax ) // Avoid rounding errors due to precision issues seen
          {               // 64 bits systems. Split long distances and recompute
            G4double fTerm = sd-std::fmod(sd,dRmax);
            sd = fTerm + DistanceToIn(p+fTerm*v,v);
          } 
          zi = p.z() + sd*v.z() ;
          if (std::fabs(zi) <= tolODz)
          {
            // Z ok. Check phi
            //
            if ( fPhiFullTube )
            {
              return sd ; 
            }
            else
            {
              xi     = p.x() + sd*v.x() ;
              yi     = p.y() + sd*v.y() ;
              cosPsi = (xi*cosCPhi + yi*sinCPhi)/fRMin ;
              if (cosPsi >= cosHDPhiIT)
              {
                // Good inner radius isect
                // - but earlier phi isect still possible

                snxt = sd ;
              }
            }
          }        //    end if std::fabs(zi)
        }          //    end if (sd>=0)
      }            //    end if (d>=0)
    }              //    end if (fRMin)
  }

  // Phi segment intersection
  //
  // o Tolerant of points inside phi planes by up to kCarTolerance*0.5
  //
  // o NOTE: Large duplication of code between sphi & ephi checks
  //         -> only diffs: sphi -> ephi, Comp -> -Comp and half-plane
  //            intersection check <=0 -> >=0
  //         -> use some form of loop Construct ?
  //
  if ( !fPhiFullTube )
  {
    // First phi surface (Starting phi)
    //
    Comp    = v.x()*sinSPhi - v.y()*cosSPhi ;
                    
    if ( Comp < 0 )  // Component in outwards normal dirn
    {
      Dist = (p.y()*cosSPhi - p.x()*sinSPhi) ;

      if ( Dist < halfCarTolerance )
      {
        sd = Dist/Comp ;

        if (sd < snxt)
        {
          if ( sd < 0 )  { sd = 0.0; }
          zi = p.z() + sd*v.z() ;
          if ( std::fabs(zi) <= tolODz )
          {
            xi   = p.x() + sd*v.x() ;
            yi   = p.y() + sd*v.y() ;
            rho2 = xi*xi + yi*yi ;

            if ( ( (rho2 >= tolIRMin2) && (rho2 <= tolIRMax2) )
              || ( (rho2 >  tolORMin2) && (rho2 <  tolIRMin2)
                && ( v.y()*cosSPhi - v.x()*sinSPhi >  0 )
                && ( v.x()*cosSPhi + v.y()*sinSPhi >= 0 )     )
              || ( (rho2 > tolIRMax2) && (rho2 < tolORMax2)
                && (v.y()*cosSPhi - v.x()*sinSPhi > 0)
                && (v.x()*cosSPhi + v.y()*sinSPhi < 0) )    )
            {
              // z and r intersections good
              // - check intersecting with correct half-plane
              //
              if ((yi*cosCPhi-xi*sinCPhi) <= halfCarTolerance) { snxt = sd; }
            }
          }
        }
      }    
    }
      
    // Second phi surface (Ending phi)

    Comp    = -(v.x()*sinEPhi - v.y()*cosEPhi) ;
        
    if (Comp < 0 )  // Component in outwards normal dirn
    {
      Dist = -(p.y()*cosEPhi - p.x()*sinEPhi) ;

      if ( Dist < halfCarTolerance )
      {
        sd = Dist/Comp ;

        if (sd < snxt)
        {
          if ( sd < 0 )  { sd = 0; }
          zi = p.z() + sd*v.z() ;
          if ( std::fabs(zi) <= tolODz )
          {
            xi   = p.x() + sd*v.x() ;
            yi   = p.y() + sd*v.y() ;
            rho2 = xi*xi + yi*yi ;
            if ( ( (rho2 >= tolIRMin2) && (rho2 <= tolIRMax2) )
                || ( (rho2 > tolORMin2)  && (rho2 < tolIRMin2)
                  && (v.x()*sinEPhi - v.y()*cosEPhi >  0)
                  && (v.x()*cosEPhi + v.y()*sinEPhi >= 0) )
                || ( (rho2 > tolIRMax2) && (rho2 < tolORMax2)
                  && (v.x()*sinEPhi - v.y()*cosEPhi > 0)
                  && (v.x()*cosEPhi + v.y()*sinEPhi < 0) ) )
            {
              // z and r intersections good
              // - check intersecting with correct half-plane
              //
              if ( (yi*cosCPhi-xi*sinCPhi) >= 0 ) { snxt = sd; }
            }                         //?? >=-halfCarTolerance
          }
        }
      }
    }         //  Comp < 0
  }           //  !fPhiFullTube 
  if ( snxt<halfCarTolerance )  { snxt=0; }
  return snxt ;
}

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DistanceToIn() [2/2]

G4double G4Tubs::DistanceToIn ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 1188 of file G4Tubs.cc.

{
  G4double safe=0.0, rho, safe1, safe2, safe3 ;
  G4double safePhi, cosPsi ;

  rho   = std::sqrt(p.x()*p.x() + p.y()*p.y()) ;
  safe1 = fRMin - rho ;
  safe2 = rho - fRMax ;
  safe3 = std::fabs(p.z()) - fDz ;

  if ( safe1 > safe2 ) { safe = safe1; }
  else                 { safe = safe2; }
  if ( safe3 > safe )  { safe = safe3; }

  if ( (!fPhiFullTube) && (rho) )
  {
    // Psi=angle from central phi to point
    //
    cosPsi = (p.x()*cosCPhi + p.y()*sinCPhi)/rho ;
    
    if ( cosPsi < std::cos(fDPhi*0.5) )
    {
      // Point lies outside phi range

      if ( (p.y()*cosCPhi - p.x()*sinCPhi) <= 0 )
      {
        safePhi = std::fabs(p.x()*sinSPhi - p.y()*cosSPhi) ;
      }
      else
      {
        safePhi = std::fabs(p.x()*sinEPhi - p.y()*cosEPhi) ;
      }
      if ( safePhi > safe )  { safe = safePhi; }
    }
  }
  if ( safe < 0 )  { safe = 0; }
  return safe ;
}

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DistanceToOut() [1/2]

G4double G4Tubs::DistanceToOut ( const G4ThreeVector &  p, const G4ThreeVector &  v, const G4bool  calcNorm = G4bool(false), G4bool *  validNorm = 0, G4ThreeVector *  n = 0  ) const

virtual

Implements G4VSolid.

Definition at line 1232 of file G4Tubs.cc.

{  
  ESide side=kNull , sider=kNull, sidephi=kNull ;
  G4double snxt, srd=kInfinity, sphi=kInfinity, pdist ;
  G4double deltaR, t1, t2, t3, b, c, d2, roMin2 ;

  // Vars for phi intersection:

  G4double pDistS, compS, pDistE, compE, sphi2, xi, yi, vphi, roi2 ;
 
  // Z plane intersection

  if (v.z() > 0 )
  {
    pdist = fDz - p.z() ;
    if ( pdist > halfCarTolerance )
    {
      snxt = pdist/v.z() ;
      side = kPZ ;
    }
    else
    {
      if (calcNorm)
      {
        *n         = G4ThreeVector(0,0,1) ;
        *validNorm = true ;
      }
      return snxt = 0 ;
    }
  }
  else if ( v.z() < 0 )
  {
    pdist = fDz + p.z() ;

    if ( pdist > halfCarTolerance )
    {
      snxt = -pdist/v.z() ;
      side = kMZ ;
    }
    else
    {
      if (calcNorm)
      {
        *n         = G4ThreeVector(0,0,-1) ;
        *validNorm = true ;
      }
      return snxt = 0.0 ;
    }
  }
  else
  {
    snxt = kInfinity ;    // Travel perpendicular to z axis
    side = kNull;
  }

  // Radial Intersections
  //
  // Find intersection with cylinders at rmax/rmin
  // Intersection point (xi,yi,zi) on line x=p.x+t*v.x etc.
  //
  // Intersects with x^2+y^2=R^2
  //
  // Hence (v.x^2+v.y^2)t^2+ 2t(p.x*v.x+p.y*v.y)+p.x^2+p.y^2-R^2=0
  //
  //            t1                t2                    t3

  t1   = 1.0 - v.z()*v.z() ;      // since v normalised
  t2   = p.x()*v.x() + p.y()*v.y() ;
  t3   = p.x()*p.x() + p.y()*p.y() ;

  if ( snxt > 10*(fDz+fRMax) )  { roi2 = 2*fRMax*fRMax; }
  else  { roi2 = snxt*snxt*t1 + 2*snxt*t2 + t3; }        // radius^2 on +-fDz

  if ( t1 > 0 ) // Check not parallel
  {
    // Calculate srd, r exit distance
     
    if ( (t2 >= 0.0) && (roi2 > fRMax*(fRMax + kRadTolerance)) )
    {
      // Delta r not negative => leaving via rmax

      deltaR = t3 - fRMax*fRMax ;

      // NOTE: Should use rho-fRMax<-kRadTolerance*0.5
      // - avoid sqrt for efficiency

      if ( deltaR < -kRadTolerance*fRMax )
      {
        b     = t2/t1 ;
        c     = deltaR/t1 ;
        d2    = b*b-c;
        if( d2 >= 0 ) { srd = c/( -b - std::sqrt(d2)); }
        else          { srd = 0.; }
        sider = kRMax ;
      }
      else
      {
        // On tolerant boundary & heading outwards (or perpendicular to)
        // outer radial surface -> leaving immediately

        if ( calcNorm ) 
        {
          *n         = G4ThreeVector(p.x()/fRMax,p.y()/fRMax,0) ;
          *validNorm = true ;
        }
        return snxt = 0 ; // Leaving by rmax immediately
      }
    }             
    else if ( t2 < 0. ) // i.e.  t2 < 0; Possible rmin intersection
    {
      roMin2 = t3 - t2*t2/t1 ; // min ro2 of the plane of movement 

      if ( fRMin && (roMin2 < fRMin*(fRMin - kRadTolerance)) )
      {
        deltaR = t3 - fRMin*fRMin ;
        b      = t2/t1 ;
        c      = deltaR/t1 ;
        d2     = b*b - c ;

        if ( d2 >= 0 )   // Leaving via rmin
        {
          // NOTE: SHould use rho-rmin>kRadTolerance*0.5
          // - avoid sqrt for efficiency

          if (deltaR > kRadTolerance*fRMin)
          {
            srd = c/(-b+std::sqrt(d2)); 
            sider = kRMin ;
          }
          else
          {
            if ( calcNorm ) { *validNorm = false; }  // Concave side
            return snxt = 0.0;
          }
        }
        else    // No rmin intersect -> must be rmax intersect
        {
          deltaR = t3 - fRMax*fRMax ;
          c     = deltaR/t1 ;
          d2    = b*b-c;
          if( d2 >=0. )
          {
            srd     = -b + std::sqrt(d2) ;
            sider  = kRMax ;
          }
          else // Case: On the border+t2<kRadTolerance
               //       (v is perpendicular to the surface)
          {
            if (calcNorm)
            {
              *n = G4ThreeVector(p.x()/fRMax,p.y()/fRMax,0) ;
              *validNorm = true ;
            }
            return snxt = 0.0;
          }
        }
      }
      else if ( roi2 > fRMax*(fRMax + kRadTolerance) )
           // No rmin intersect -> must be rmax intersect
      {
        deltaR = t3 - fRMax*fRMax ;
        b      = t2/t1 ;
        c      = deltaR/t1;
        d2     = b*b-c;
        if( d2 >= 0 )
        {
          srd     = -b + std::sqrt(d2) ;
          sider  = kRMax ;
        }
        else // Case: On the border+t2<kRadTolerance
             //       (v is perpendicular to the surface)
        {
          if (calcNorm)
          {
            *n = G4ThreeVector(p.x()/fRMax,p.y()/fRMax,0) ;
            *validNorm = true ;
          }
          return snxt = 0.0;
        }
      }
    }
    
    // Phi Intersection

    if ( !fPhiFullTube )
    {
      // add angle calculation with correction 
      // of the difference in domain of atan2 and Sphi
      //
      vphi = std::atan2(v.y(),v.x()) ;
     
      if ( vphi < fSPhi - halfAngTolerance  )             { vphi += twopi; }
      else if ( vphi > fSPhi + fDPhi + halfAngTolerance ) { vphi -= twopi; }


      if ( p.x() || p.y() )  // Check if on z axis (rho not needed later)
      {
        // pDist -ve when inside

        pDistS = p.x()*sinSPhi - p.y()*cosSPhi ;
        pDistE = -p.x()*sinEPhi + p.y()*cosEPhi ;

        // Comp -ve when in direction of outwards normal

        compS   = -sinSPhi*v.x() + cosSPhi*v.y() ;
        compE   =  sinEPhi*v.x() - cosEPhi*v.y() ;
       
        sidephi = kNull;
        
        if( ( (fDPhi <= pi) && ( (pDistS <= halfCarTolerance)
                              && (pDistE <= halfCarTolerance) ) )
         || ( (fDPhi >  pi) && !((pDistS >  halfCarTolerance)
                              && (pDistE >  halfCarTolerance) ) )  )
        {
          // Inside both phi *full* planes
          
          if ( compS < 0 )
          {
            sphi = pDistS/compS ;
            
            if (sphi >= -halfCarTolerance)
            {
              xi = p.x() + sphi*v.x() ;
              yi = p.y() + sphi*v.y() ;
              
              // Check intersecting with correct half-plane
              // (if not -> no intersect)
              //
              if( (std::fabs(xi)<=kCarTolerance)&&(std::fabs(yi)<=kCarTolerance) )
              {
                sidephi = kSPhi;
                if (((fSPhi-halfAngTolerance)<=vphi)
                   &&((fSPhi+fDPhi+halfAngTolerance)>=vphi))
                {
                  sphi = kInfinity;
                }
              }
              else if ( yi*cosCPhi-xi*sinCPhi >=0 )
              {
                sphi = kInfinity ;
              }
              else
              {
                sidephi = kSPhi ;
                if ( pDistS > -halfCarTolerance )
                {
                  sphi = 0.0 ; // Leave by sphi immediately
                }    
              }       
            }
            else
            {
              sphi = kInfinity ;
            }
          }
          else
          {
            sphi = kInfinity ;
          }

          if ( compE < 0 )
          {
            sphi2 = pDistE/compE ;
            
            // Only check further if < starting phi intersection
            //
            if ( (sphi2 > -halfCarTolerance) && (sphi2 < sphi) )
            {
              xi = p.x() + sphi2*v.x() ;
              yi = p.y() + sphi2*v.y() ;
              
              if ((std::fabs(xi)<=kCarTolerance)&&(std::fabs(yi)<=kCarTolerance))
              {
                // Leaving via ending phi
                //
                if( !((fSPhi-halfAngTolerance <= vphi)
                     &&(fSPhi+fDPhi+halfAngTolerance >= vphi)) )
                {
                  sidephi = kEPhi ;
                  if ( pDistE <= -halfCarTolerance )  { sphi = sphi2 ; }
                  else                                { sphi = 0.0 ;   }
                }
              } 
              else    // Check intersecting with correct half-plane 

              if ( (yi*cosCPhi-xi*sinCPhi) >= 0)
              {
                // Leaving via ending phi
                //
                sidephi = kEPhi ;
                if ( pDistE <= -halfCarTolerance ) { sphi = sphi2 ; }
                else                               { sphi = 0.0 ;   }
              }
            }
          }
        }
        else
        {
          sphi = kInfinity ;
        }
      }
      else
      {
        // On z axis + travel not || to z axis -> if phi of vector direction
        // within phi of shape, Step limited by rmax, else Step =0
               
        if ( (fSPhi - halfAngTolerance <= vphi)
           && (vphi <= fSPhi + fDPhi + halfAngTolerance ) )
        {
          sphi = kInfinity ;
        }
        else
        {
          sidephi = kSPhi ; // arbitrary 
          sphi    = 0.0 ;
        }
      }
      if (sphi < snxt)  // Order intersecttions
      {
        snxt = sphi ;
        side = sidephi ;
      }
    }
    if (srd < snxt)  // Order intersections
    {
      snxt = srd ;
      side = sider ;
    }
  }
  if (calcNorm)
  {
    switch(side)
    {
      case kRMax:
        // Note: returned vector not normalised
        // (divide by fRMax for unit vector)
        //
        xi = p.x() + snxt*v.x() ;
        yi = p.y() + snxt*v.y() ;
        *n = G4ThreeVector(xi/fRMax,yi/fRMax,0) ;
        *validNorm = true ;
        break ;

      case kRMin:
        *validNorm = false ;  // Rmin is inconvex
        break ;

      case kSPhi:
        if ( fDPhi <= pi )
        {
          *n         = G4ThreeVector(sinSPhi,-cosSPhi,0) ;
          *validNorm = true ;
        }
        else
        {
          *validNorm = false ;
        }
        break ;

      case kEPhi:
        if (fDPhi <= pi)
        {
          *n = G4ThreeVector(-sinEPhi,cosEPhi,0) ;
          *validNorm = true ;
        }
        else
        {
          *validNorm = false ;
        }
        break ;

      case kPZ:
        *n         = G4ThreeVector(0,0,1) ;
        *validNorm = true ;
        break ;

      case kMZ:
        *n         = G4ThreeVector(0,0,-1) ;
        *validNorm = true ;
        break ;

      default:
        G4cout << G4endl ;
        DumpInfo();
        std::ostringstream message;
        G4int oldprc = message.precision(16);
        message << "Undefined side for valid surface normal to solid."
                << G4endl
                << "Position:"  << G4endl << G4endl
                << "p.x() = "   << p.x()/mm << " mm" << G4endl
                << "p.y() = "   << p.y()/mm << " mm" << G4endl
                << "p.z() = "   << p.z()/mm << " mm" << G4endl << G4endl
                << "Direction:" << G4endl << G4endl
                << "v.x() = "   << v.x() << G4endl
                << "v.y() = "   << v.y() << G4endl
                << "v.z() = "   << v.z() << G4endl << G4endl
                << "Proposed distance :" << G4endl << G4endl
                << "snxt = "    << snxt/mm << " mm" << G4endl ;
        message.precision(oldprc) ;
        G4Exception("G4Tubs::DistanceToOut(p,v,..)", "GeomSolids1002",
                    JustWarning, message);
        break ;
    }
  }
  if ( snxt<halfCarTolerance )  { snxt=0 ; }

  return snxt ;
}

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DistanceToOut() [2/2]

G4double G4Tubs::DistanceToOut ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 1649 of file G4Tubs.cc.

{
  G4double safe=0.0, rho, safeR1, safeR2, safeZ, safePhi ;
  rho = std::sqrt(p.x()*p.x() + p.y()*p.y()) ;

#ifdef G4CSGDEBUG
  if( Inside(p) == kOutside )
  {
    G4int oldprc = G4cout.precision(16) ;
    G4cout << G4endl ;
    DumpInfo();
    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.precision(oldprc) ;
    G4Exception("G4Tubs::DistanceToOut(p)", "GeomSolids1002",
                JustWarning, "Point p is outside !?");
  }
#endif

  if ( fRMin )
  {
    safeR1 = rho   - fRMin ;
    safeR2 = fRMax - rho ;
 
    if ( safeR1 < safeR2 ) { safe = safeR1 ; }
    else                   { safe = safeR2 ; }
  }
  else
  {
    safe = fRMax - rho ;
  }
  safeZ = fDz - std::fabs(p.z()) ;

  if ( safeZ < safe )  { safe = safeZ ; }

  // Check if phi divided, Calc distances closest phi plane
  //
  if ( !fPhiFullTube )
  {
    if ( p.y()*cosCPhi-p.x()*sinCPhi <= 0 )
    {
      safePhi = -(p.x()*sinSPhi - p.y()*cosSPhi) ;
    }
    else
    {
      safePhi = (p.x()*sinEPhi - p.y()*cosEPhi) ;
    }
    if (safePhi < safe)  { safe = safePhi ; }
  }
  if ( safe < 0 )  { safe = 0 ; }

  return safe ;  
}

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GetCubicVolume()

G4double G4Tubs::GetCubicVolume ( )

inlinevirtual

Reimplemented from G4VSolid.

GetDeltaPhiAngle()

G4double G4Tubs::GetDeltaPhiAngle ( ) const

inline

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GetDPhi()

G4double G4Tubs::GetDPhi ( ) const

inline

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GetDz()

G4double G4Tubs::GetDz ( ) const

inline

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GetEntityType()

G4GeometryType G4Tubs::GetEntityType ( ) const

virtual

Implements G4VSolid.

Definition at line 1803 of file G4Tubs.cc.

{
  return G4String("G4Tubs");
}

GetInnerRadius()

G4double G4Tubs::GetInnerRadius ( ) const

inline

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GetOuterRadius()

G4double G4Tubs::GetOuterRadius ( ) const

inline

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GetPointOnSurface()

G4ThreeVector G4Tubs::GetPointOnSurface ( ) const

virtual

Reimplemented from G4VSolid.

Definition at line 1844 of file G4Tubs.cc.

{
  G4double xRand, yRand, zRand, phi, cosphi, sinphi, chose,
           aOne, aTwo, aThr, aFou;
  G4double rRand;

  aOne = 2.*fDz*fDPhi*fRMax;
  aTwo = 2.*fDz*fDPhi*fRMin;
  aThr = 0.5*fDPhi*(fRMax*fRMax-fRMin*fRMin);
  aFou = 2.*fDz*(fRMax-fRMin);

  phi    = G4RandFlat::shoot(fSPhi, fSPhi+fDPhi);
  cosphi = std::cos(phi);
  sinphi = std::sin(phi);

  rRand  = GetRadiusInRing(fRMin,fRMax);
  
  if( (fSPhi == 0) && (fDPhi == twopi) ) { aFou = 0; }
  
  chose  = G4RandFlat::shoot(0.,aOne+aTwo+2.*aThr+2.*aFou);

  if( (chose >=0) && (chose < aOne) )
  {
    xRand = fRMax*cosphi;
    yRand = fRMax*sinphi;
    zRand = G4RandFlat::shoot(-1.*fDz,fDz);
    return G4ThreeVector  (xRand, yRand, zRand);
  }
  else if( (chose >= aOne) && (chose < aOne + aTwo) )
  {
    xRand = fRMin*cosphi;
    yRand = fRMin*sinphi;
    zRand = G4RandFlat::shoot(-1.*fDz,fDz);
    return G4ThreeVector  (xRand, yRand, zRand);
  }
  else if( (chose >= aOne + aTwo) && (chose < aOne + aTwo + aThr) )
  {
    xRand = rRand*cosphi;
    yRand = rRand*sinphi;
    zRand = fDz;
    return G4ThreeVector  (xRand, yRand, zRand);
  }
  else if( (chose >= aOne + aTwo + aThr) && (chose < aOne + aTwo + 2.*aThr) )
  {
    xRand = rRand*cosphi;
    yRand = rRand*sinphi;
    zRand = -1.*fDz;
    return G4ThreeVector  (xRand, yRand, zRand);
  }
  else if( (chose >= aOne + aTwo + 2.*aThr)
        && (chose < aOne + aTwo + 2.*aThr + aFou) )
  {
    xRand = rRand*std::cos(fSPhi);
    yRand = rRand*std::sin(fSPhi);
    zRand = G4RandFlat::shoot(-1.*fDz,fDz);
    return G4ThreeVector  (xRand, yRand, zRand);
  }
  else
  {
    xRand = rRand*std::cos(fSPhi+fDPhi);
    yRand = rRand*std::sin(fSPhi+fDPhi);
    zRand = G4RandFlat::shoot(-1.*fDz,fDz);
    return G4ThreeVector  (xRand, yRand, zRand);
  }
}

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GetRMax()

G4double G4Tubs::GetRMax ( ) const

inline

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GetRMin()

G4double G4Tubs::GetRMin ( ) const

inline

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GetSPhi()

G4double G4Tubs::GetSPhi ( ) const

inline

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GetStartPhiAngle()

G4double G4Tubs::GetStartPhiAngle ( ) const

inline

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GetSurfaceArea()

G4double G4Tubs::GetSurfaceArea ( )

inlinevirtual

Reimplemented from G4VSolid.

GetZHalfLength()

G4double G4Tubs::GetZHalfLength ( ) const

inline

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Initialize()

void G4Tubs::Initialize ( )

inlineprotected

InitializeTrigonometry()

void G4Tubs::InitializeTrigonometry ( )

inlineprotected

Inside()

EInside G4Tubs::Inside ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 422 of file G4Tubs.cc.

{
  G4double r2,pPhi,tolRMin,tolRMax;
  EInside in = kOutside ;

  if (std::fabs(p.z()) <= fDz - halfCarTolerance)
  {
    r2 = p.x()*p.x() + p.y()*p.y() ;

    if (fRMin) { tolRMin = fRMin + halfRadTolerance ; }
    else       { tolRMin = 0 ; }

    tolRMax = fRMax - halfRadTolerance ;
      
    if ((r2 >= tolRMin*tolRMin) && (r2 <= tolRMax*tolRMax))
    {
      if ( fPhiFullTube )
      {
        in = kInside ;
      }
      else
      {
        // Try inner tolerant phi boundaries (=>inside)
        // if not inside, try outer tolerant phi boundaries

        if ( (tolRMin==0) && (std::fabs(p.x())<=halfCarTolerance)
                          && (std::fabs(p.y())<=halfCarTolerance) )
        {
          in=kSurface;
        }
        else
        {
          pPhi = std::atan2(p.y(),p.x()) ;
          if ( pPhi < -halfAngTolerance )  { pPhi += twopi; } // 0<=pPhi<2pi

          if ( fSPhi >= 0 )
          {
            if ( (std::fabs(pPhi) < halfAngTolerance)
              && (std::fabs(fSPhi + fDPhi - twopi) < halfAngTolerance) )
            { 
              pPhi += twopi ; // 0 <= pPhi < 2pi
            }
            if ( (pPhi >= fSPhi + halfAngTolerance)
              && (pPhi <= fSPhi + fDPhi - halfAngTolerance) )
            {
              in = kInside ;
            }
            else if ( (pPhi >= fSPhi - halfAngTolerance)
                   && (pPhi <= fSPhi + fDPhi + halfAngTolerance) )
            {
              in = kSurface ;
            }
          }
          else  // fSPhi < 0
          {
            if ( (pPhi <= fSPhi + twopi - halfAngTolerance)
              && (pPhi >= fSPhi + fDPhi  + halfAngTolerance) ) {;} //kOutside
            else if ( (pPhi <= fSPhi + twopi + halfAngTolerance)
                   && (pPhi >= fSPhi + fDPhi  - halfAngTolerance) )
            {
              in = kSurface ;
            }
            else
            {
              in = kInside ;
            }
          }
        }                    
      }
    }
    else  // Try generous boundaries
    {
      tolRMin = fRMin - halfRadTolerance ;
      tolRMax = fRMax + halfRadTolerance ;

      if ( tolRMin < 0 )  { tolRMin = 0; }

      if ( (r2 >= tolRMin*tolRMin) && (r2 <= tolRMax*tolRMax) )
      {
        if (fPhiFullTube || (r2 <=halfRadTolerance*halfRadTolerance) )
        {                        // Continuous in phi or on z-axis
          in = kSurface ;
        }
        else // Try outer tolerant phi boundaries only
        {
          pPhi = std::atan2(p.y(),p.x()) ;

          if ( pPhi < -halfAngTolerance)  { pPhi += twopi; } // 0<=pPhi<2pi
          if ( fSPhi >= 0 )
          {
            if ( (std::fabs(pPhi) < halfAngTolerance)
              && (std::fabs(fSPhi + fDPhi - twopi) < halfAngTolerance) )
            { 
              pPhi += twopi ; // 0 <= pPhi < 2pi
            }
            if ( (pPhi >= fSPhi - halfAngTolerance)
              && (pPhi <= fSPhi + fDPhi + halfAngTolerance) )
            {
              in = kSurface ;
            }
          }
          else  // fSPhi < 0
          {
            if ( (pPhi <= fSPhi + twopi - halfAngTolerance)
              && (pPhi >= fSPhi + fDPhi + halfAngTolerance) ) {;} // kOutside
            else
            {
              in = kSurface ;
            }
          }
        }
      }
    }
  }
  else if (std::fabs(p.z()) <= fDz + halfCarTolerance)
  {                                          // Check within tolerant r limits
    r2      = p.x()*p.x() + p.y()*p.y() ;
    tolRMin = fRMin - halfRadTolerance ;
    tolRMax = fRMax + halfRadTolerance ;

    if ( tolRMin < 0 )  { tolRMin = 0; }

    if ( (r2 >= tolRMin*tolRMin) && (r2 <= tolRMax*tolRMax) )
    {
      if (fPhiFullTube || (r2 <=halfRadTolerance*halfRadTolerance))
      {                        // Continuous in phi or on z-axis
        in = kSurface ;
      }
      else // Try outer tolerant phi boundaries
      {
        pPhi = std::atan2(p.y(),p.x()) ;

        if ( pPhi < -halfAngTolerance )  { pPhi += twopi; }  // 0<=pPhi<2pi
        if ( fSPhi >= 0 )
        {
          if ( (std::fabs(pPhi) < halfAngTolerance)
            && (std::fabs(fSPhi + fDPhi - twopi) < halfAngTolerance) )
          { 
            pPhi += twopi ; // 0 <= pPhi < 2pi
          }
          if ( (pPhi >= fSPhi - halfAngTolerance)
            && (pPhi <= fSPhi + fDPhi + halfAngTolerance) )
          {
            in = kSurface;
          }
        }
        else  // fSPhi < 0
        {
          if ( (pPhi <= fSPhi + twopi - halfAngTolerance)
            && (pPhi >= fSPhi + fDPhi  + halfAngTolerance) ) {;}
          else
          {
            in = kSurface ;
          }
        }      
      }
    }
  }
  return in;
}

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operator=()

G4Tubs & G4Tubs::operator=

(

const G4Tubs &

rhs

)

Definition at line 165 of file G4Tubs.cc.

{
   // Check assignment to self
   //
   if (this == &rhs)  { return *this; }

   // Copy base class data
   //
   G4CSGSolid::operator=(rhs);

   // Copy data
   //
   kRadTolerance = rhs.kRadTolerance; kAngTolerance = rhs.kAngTolerance;
   fRMin = rhs.fRMin; fRMax = rhs.fRMax; fDz = rhs.fDz;
   fSPhi = rhs.fSPhi; fDPhi = rhs.fDPhi;
   sinCPhi = rhs.sinCPhi; cosCPhi = rhs.cosCPhi;
   cosHDPhiOT = rhs.cosHDPhiOT; cosHDPhiIT = rhs.cosHDPhiIT;
   sinSPhi = rhs.sinSPhi; cosSPhi = rhs.cosSPhi;
   sinEPhi = rhs.sinEPhi; cosEPhi = rhs.cosEPhi;
   fPhiFullTube = rhs.fPhiFullTube;
   halfCarTolerance = rhs.halfCarTolerance;
   halfRadTolerance = rhs.halfRadTolerance;
   halfAngTolerance = rhs.halfAngTolerance;

   return *this;
}

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SetDeltaPhiAngle()

void G4Tubs::SetDeltaPhiAngle ( G4double  newDPhi )

inline

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SetInnerRadius()

void G4Tubs::SetInnerRadius ( G4double  newRMin )

inline

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SetOuterRadius()

void G4Tubs::SetOuterRadius ( G4double  newRMax )

inline

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SetStartPhiAngle()

void G4Tubs::SetStartPhiAngle ( G4double  newSPhi, G4bool  trig = true  )

inline

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SetZHalfLength()

void G4Tubs::SetZHalfLength ( G4double  newDz )

inline

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StreamInfo()

std::ostream & G4Tubs::StreamInfo ( std::ostream &  os ) const

virtual

Reimplemented from G4CSGSolid.

Definition at line 1821 of file G4Tubs.cc.

{
  G4int oldprc = os.precision(16);
  os << "-----------------------------------------------------------\n"
     << "    *** Dump for solid - " << GetName() << " ***\n"
     << "    ===================================================\n"
     << " Solid type: G4Tubs\n"
     << " Parameters: \n"
     << "    inner radius : " << fRMin/mm << " mm \n"
     << "    outer radius : " << fRMax/mm << " mm \n"
     << "    half length Z: " << fDz/mm << " mm \n"
     << "    starting phi : " << fSPhi/degree << " degrees \n"
     << "    delta phi    : " << fDPhi/degree << " degrees \n"
     << "-----------------------------------------------------------\n";
  os.precision(oldprc);

  return os;
}

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SurfaceNormal()

G4ThreeVector G4Tubs::SurfaceNormal ( const G4ThreeVector &  p ) const

virtual

Implements G4VSolid.

Definition at line 589 of file G4Tubs.cc.

{
  G4int noSurfaces = 0;
  G4double rho, pPhi;
  G4double distZ, distRMin, distRMax;
  G4double distSPhi = kInfinity, distEPhi = kInfinity;

  G4ThreeVector norm, sumnorm(0.,0.,0.);
  G4ThreeVector nZ = G4ThreeVector(0, 0, 1.0);
  G4ThreeVector nR, nPs, nPe;

  rho = std::sqrt(p.x()*p.x() + p.y()*p.y());

  distRMin = std::fabs(rho - fRMin);
  distRMax = std::fabs(rho - fRMax);
  distZ    = std::fabs(std::fabs(p.z()) - fDz);

  if (!fPhiFullTube)    // Protected against (0,0,z) 
  {
    if ( rho > halfCarTolerance )
    {
      pPhi = std::atan2(p.y(),p.x());
    
      if(pPhi  < fSPhi- halfCarTolerance)           { pPhi += twopi; }
      else if(pPhi > fSPhi+fDPhi+ halfCarTolerance) { pPhi -= twopi; }

      distSPhi = std::fabs(pPhi - fSPhi);       
      distEPhi = std::fabs(pPhi - fSPhi - fDPhi); 
    }
    else if( !fRMin )
    {
      distSPhi = 0.; 
      distEPhi = 0.; 
    }
    nPs = G4ThreeVector(std::sin(fSPhi),-std::cos(fSPhi),0);
    nPe = G4ThreeVector(-std::sin(fSPhi+fDPhi),std::cos(fSPhi+fDPhi),0);
  }
  if ( rho > halfCarTolerance ) { nR = G4ThreeVector(p.x()/rho,p.y()/rho,0); }

  if( distRMax <= halfCarTolerance )
  {
    noSurfaces ++;
    sumnorm += nR;
  }
  if( fRMin && (distRMin <= halfCarTolerance) )
  {
    noSurfaces ++;
    sumnorm -= nR;
  }
  if( fDPhi < twopi )   
  {
    if (distSPhi <= halfAngTolerance)  
    {
      noSurfaces ++;
      sumnorm += nPs;
    }
    if (distEPhi <= halfAngTolerance)  
    {
      noSurfaces ++;
      sumnorm += nPe;
    }
  }
  if (distZ <= halfCarTolerance)  
  {
    noSurfaces ++;
    if ( p.z() >= 0.)  { sumnorm += nZ; }
    else               { sumnorm -= nZ; }
  }
  if ( noSurfaces == 0 )
  {
#ifdef G4CSGDEBUG
    G4Exception("G4Tubs::SurfaceNormal(p)", "GeomSolids1002",
                JustWarning, "Point p is not on surface !?" );
    G4int oldprc = G4cout.precision(20);
    G4cout<< "G4Tubs::SN ( "<<p.x()<<", "<<p.y()<<", "<<p.z()<<" ); "
          << G4endl << G4endl;
    G4cout.precision(oldprc) ;
#endif 
     norm = ApproxSurfaceNormal(p);
  }
  else if ( noSurfaces == 1 )  { norm = sumnorm; }
  else                         { norm = sumnorm.unit(); }

  return norm;
}

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Member Data Documentation

cosCPhi

G4double G4Tubs::cosCPhi

protected

Definition at line 221 of file G4Tubs.hh.

cosEPhi

G4double G4Tubs::cosEPhi

protected

Definition at line 221 of file G4Tubs.hh.

cosHDPhiIT

G4double G4Tubs::cosHDPhiIT

protected

Definition at line 221 of file G4Tubs.hh.

cosHDPhiOT

G4double G4Tubs::cosHDPhiOT

protected

Definition at line 221 of file G4Tubs.hh.

cosSPhi

G4double G4Tubs::cosSPhi

protected

Definition at line 221 of file G4Tubs.hh.

fDPhi

G4double G4Tubs::fDPhi

protected

Definition at line 217 of file G4Tubs.hh.

fDz

G4double G4Tubs::fDz

protected

Definition at line 217 of file G4Tubs.hh.

fPhiFullTube

G4bool G4Tubs::fPhiFullTube

protected

Definition at line 226 of file G4Tubs.hh.

fRMax

G4double G4Tubs::fRMax

protected

Definition at line 217 of file G4Tubs.hh.

fRMin

G4double G4Tubs::fRMin

protected

Definition at line 217 of file G4Tubs.hh.

fSPhi

G4double G4Tubs::fSPhi

protected

Definition at line 217 of file G4Tubs.hh.

halfAngTolerance

G4double G4Tubs::halfAngTolerance

protected

Definition at line 230 of file G4Tubs.hh.

halfCarTolerance

G4double G4Tubs::halfCarTolerance

protected

Definition at line 230 of file G4Tubs.hh.

halfRadTolerance

G4double G4Tubs::halfRadTolerance

protected

Definition at line 230 of file G4Tubs.hh.

kAngTolerance

G4double G4Tubs::kAngTolerance

protected

Definition at line 213 of file G4Tubs.hh.

kRadTolerance

G4double G4Tubs::kRadTolerance

protected

Definition at line 213 of file G4Tubs.hh.

sinCPhi

G4double G4Tubs::sinCPhi

protected

Definition at line 221 of file G4Tubs.hh.

sinEPhi

G4double G4Tubs::sinEPhi

protected

Definition at line 221 of file G4Tubs.hh.

sinSPhi

G4double G4Tubs::sinSPhi

protected

Definition at line 221 of file G4Tubs.hh.

---

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

• G4Tubs.hh
• G4Tubs.cc