G4EnclosingCylinder Class Reference

#include <G4EnclosingCylinder.hh>

Public Member Functions
	G4EnclosingCylinder (const G4ReduciblePolygon *rz, G4bool phiIsOpen, G4double startPhi, G4double totalPhi)
	~G4EnclosingCylinder ()
G4bool	MustBeOutside (const G4ThreeVector &p) const
G4bool	ShouldMiss (const G4ThreeVector &p, const G4ThreeVector &v) const
	G4EnclosingCylinder (__void__ &)

Protected Attributes
G4double	radius
G4double	zLo
G4double	zHi
G4bool	phiIsOpen
G4double	startPhi
G4double	totalPhi
G4double	rx1
G4double	ry1
G4double	dx1
G4double	dy1
G4double	rx2
G4double	ry2
G4double	dx2
G4double	dy2
G4bool	concave

Detailed Description

Definition at line 53 of file G4EnclosingCylinder.hh.

Constructor & Destructor Documentation

G4EnclosingCylinder::G4EnclosingCylinder	(	const G4ReduciblePolygon *	rz,
		G4bool	phiIsOpen,
		G4double	startPhi,
		G4double	totalPhi
	)

Definition at line 48 of file G4EnclosingCylinder.cc.

  : startPhi(theStartPhi), totalPhi(theTotalPhi),
    rx1(0.), ry1(0.), dx1(0.), dy1(0.),
    rx2(0.), ry2(0.), dx2(0.), dy2(0.),     
    concave(theTotalPhi > pi)
{
  //
  // Obtain largest r and smallest and largest z
  //
  radius = rz->Amax();
  zHi = rz->Bmax();
  zLo = rz->Bmin();

  G4double kCarTolerance = G4GeometryTolerance::GetInstance()
                           ->GetSurfaceTolerance();
  //
  // Save phi info
  //
  phiIsOpen = thePhiIsOpen;
  if ( phiIsOpen )
  {    
    rx1 = std::cos(startPhi);
    ry1 = std::sin(startPhi);
    dx1 = +ry1*10*kCarTolerance;
    dy1 = -rx1*10*kCarTolerance;
    
    rx2 = std::cos(startPhi+totalPhi);
    ry2 = std::sin(startPhi+totalPhi);
    dx2 = -ry2*10*kCarTolerance;
    dy2 = +rx2*10*kCarTolerance;
  }
  
  //
  // Add safety
  //
  radius += 10*kCarTolerance;
  zLo    -= 10*kCarTolerance;
  zHi    += 10*kCarTolerance;
}

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G4EnclosingCylinder::~G4EnclosingCylinder

(

)

Definition at line 105 of file G4EnclosingCylinder.cc.

{
}

G4EnclosingCylinder::G4EnclosingCylinder

(

__void__ &

)

Definition at line 95 of file G4EnclosingCylinder.cc.

: radius(0.), zLo(0.), zHi(0.), phiIsOpen(0.), startPhi(0.), totalPhi(0.),
  rx1(0.), ry1(0.), dx1(0.), dy1(0.), rx2(0.), ry2(0.), dx2(0.), dy2(0.),
  concave(false)
{
}

Member Function Documentation

G4bool G4EnclosingCylinder::MustBeOutside

(

const G4ThreeVector &

p

)

const

Definition at line 117 of file G4EnclosingCylinder.cc.

{
  if (p.perp() > radius) return true;
  if (p.z() < zLo) return true;
  if (p.z() > zHi) return true;

  if (phiIsOpen)
  {
    if (concave)
    {
      if ( ((p.x()-dx1)*ry1 - (p.y()-dy1)*rx1) < 0) return false;
      if ( ((p.x()-dx2)*ry2 - (p.y()-dy2)*rx2) > 0) return false;
    }
    else
    {
      if ( ((p.x()-dx1)*ry1 - (p.y()-dy1)*rx1) > 0) return true;
      if ( ((p.x()-dx2)*ry2 - (p.y()-dy2)*rx2) < 0) return true;
    }
  }
  
  return false;
}

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G4bool G4EnclosingCylinder::ShouldMiss	(	const G4ThreeVector &	p,
		const G4ThreeVector &	v
	)		const

Definition at line 148 of file G4EnclosingCylinder.cc.

{
  if (!MustBeOutside(p)) return false;
  
  G4double cross = p.x()*v.y() - p.y()*v.x();
  if (cross > radius) return true;
  
  if (p.perp() > radius)
  {
    G4double dot = p.x()*v.x() + p.y()*v.y();
    if (dot > 0) return true;
  }

  return false;
}

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Member Data Documentation

G4bool G4EnclosingCylinder::concave

protected

Definition at line 91 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::dx1

protected

Definition at line 86 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::dx2

protected

Definition at line 88 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::dy1

protected

Definition at line 86 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::dy2

protected

Definition at line 88 of file G4EnclosingCylinder.hh.

G4bool G4EnclosingCylinder::phiIsOpen

protected

Definition at line 82 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::radius

protected

Definition at line 79 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::rx1

protected

Definition at line 86 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::rx2

protected

Definition at line 88 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::ry1

protected

Definition at line 86 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::ry2

protected

Definition at line 88 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::startPhi

protected

Definition at line 83 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::totalPhi

protected

Definition at line 83 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::zHi

protected

Definition at line 80 of file G4EnclosingCylinder.hh.

G4double G4EnclosingCylinder::zLo

protected

Definition at line 80 of file G4EnclosingCylinder.hh.

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

• source/geant4.10.03.p03/source/geometry/solids/specific/include/G4EnclosingCylinder.hh
• source/geant4.10.03.p03/source/geometry/solids/specific/src/G4EnclosingCylinder.cc