G4CircularCurve Class Reference

#include <G4CircularCurve.hh>

Inheritance diagram for G4CircularCurve:

Public Member Functions
	G4CircularCurve ()
virtual	~G4CircularCurve ()
	G4CircularCurve (const G4CircularCurve &right)
G4CircularCurve &	operator= (const G4CircularCurve &right)
virtual G4Curve *	Project (const G4Transform3D &tr=G4Transform3D::Identity)
virtual G4bool	Tangent (G4CurvePoint &cp, G4Vector3D &v)
virtual G4double	GetPMax () const
virtual G4Point3D	GetPoint (G4double param) const
virtual G4double	GetPPoint (const G4Point3D &p) const
G4double	GetRadius () const
void	Init (const G4Axis2Placement3D &position0, G4double radius0)
virtual G4int	IntersectRay2D (const G4Ray &ray)
Protected Member Functions
virtual void	InitBounded ()

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Detailed Description

Definition at line 44 of file G4CircularCurve.hh.

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Constructor & Destructor Documentation

G4CircularCurve::G4CircularCurve

(

)

Definition at line 41 of file G4CircularCurve.cc.

: radius(0.) {}

G4CircularCurve::~G4CircularCurve

(

)

[virtual]

Definition at line 42 of file G4CircularCurve.cc.

{}

G4CircularCurve::G4CircularCurve

(

const G4CircularCurve &

right

)

Definition at line 44 of file G4CircularCurve.cc.

References G4Curve::bBox, G4Curve::bounded, G4Curve::end, G4Curve::pEnd, G4Conic::position, G4Curve::pRange, G4Conic::pShift, G4Curve::pStart, G4Curve::sameSense, and G4Curve::start.

  : G4Conic(), radius(right.radius)
{
  pShift    = right.pShift;
  position  = right.position;
  bBox      = right.bBox;
  start     = right.start;
  end       = right.end;
  pStart    = right.pStart;
  pEnd      = right.pEnd;
  pRange    = right.pRange;
  bounded   = right.bounded;
  sameSense = right.sameSense;
}

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Member Function Documentation

G4double G4CircularCurve::GetPMax

(

)

const [virtual]

Implements G4Curve.

Definition at line 128 of file G4CircularCurve.cc.

{
  return twopi;
}

G4Point3D G4CircularCurve::GetPoint

(

G4double

param

)

const [virtual]

Implements G4Curve.

Definition at line 133 of file G4CircularCurve.cc.

References G4Axis2Placement3D::GetLocation(), G4Axis2Placement3D::GetPX(), G4Axis2Placement3D::GetPY(), and G4Conic::position.

Referenced by InitBounded().

{
  return G4Point3D( position.GetLocation()+radius*
    ( std::cos(param)*position.GetPX() + std::sin(param)*position.GetPY() ) );
}

G4double G4CircularCurve::GetPPoint

(

const G4Point3D &

p

)

const [virtual]

Implements G4Curve.

Definition at line 139 of file G4CircularCurve.cc.

References G4Axis2Placement3D::GetToPlacementCoordinates(), and G4Conic::position.

{
  G4Point3D ptLocal= position.GetToPlacementCoordinates()*pt;
  G4double angle= std::atan2(ptLocal.y(), ptLocal.x());
  return (angle<0)? angle+twopi: angle;
}

G4double G4CircularCurve::GetRadius

(

)

const [inline]

Definition at line 46 of file G4CircularCurve.icc.

{
  return radius;
}

void G4CircularCurve::Init	(	const G4Axis2Placement3D &	position0,
		G4double	radius0
	)			[inline]

Definition at line 38 of file G4CircularCurve.icc.

References G4Conic::position.

{
  position= position0;
  radius= radius0;
}

void G4CircularCurve::InitBounded

(

)

[protected, virtual]

Implements G4Curve.

Definition at line 81 of file G4CircularCurve.cc.

References G4Curve::bBox, G4BoundingBox3D::Extend(), G4Curve::GetEnd(), GetPoint(), G4Axis2Placement3D::GetPX(), G4Axis2Placement3D::GetPY(), G4Curve::GetStart(), G4BoundingBox3D::Init(), G4Curve::IsPOn(), G4INCL::Math::pi, and G4Conic::position.

{  
  // the bbox must include the start and endpoints as well as the
  // extreme points if they lie on the curve
  bBox.Init(GetStart(), GetEnd());
  
  // the parameter values
  // belonging to the points with an extreme x, y and z coordinate
  for (G4int i=0; i<3; i++) 
  {
    G4double u = std::atan2(position.GetPY()(i), position.GetPX()(i));
    
    if (IsPOn(u)) 
      bBox.Extend(GetPoint(u));
    
    if (IsPOn(u+pi)) 
      bBox.Extend(GetPoint(u+pi));
  }
}

G4int G4CircularCurve::IntersectRay2D

(

const G4Ray &

ray

)

[virtual]

Implements G4Curve.

Definition at line 160 of file G4CircularCurve.cc.

References FatalException, and G4Exception().

{
  G4Exception("G4CircularCurve::IntersectRay2D()", "GeomSolids0002",
              FatalException,"G4CircularCurve is always 3D!");
  return 0;
}

G4CircularCurve & G4CircularCurve::operator=

(

const G4CircularCurve &

right

)

Definition at line 60 of file G4CircularCurve.cc.

References G4Curve::bBox, G4Curve::bounded, G4Curve::end, G4Curve::pEnd, G4Conic::position, G4Curve::pRange, G4Conic::pShift, G4Curve::pStart, radius, G4Curve::sameSense, and G4Curve::start.

{
  if (&right == this) return *this;

  radius    = right.radius;
  pShift    = right.pShift;
  position  = right.position;
  bBox      = right.bBox;
  start     = right.start;
  end       = right.end;
  pStart    = right.pStart;
  pEnd      = right.pEnd;
  pRange    = right.pRange;
  bounded   = right.bounded;
  sameSense = right.sameSense;

  return *this;
}

G4Curve * G4CircularCurve::Project

(

const G4Transform3D &

tr = G4Transform3D::Identity

)

[virtual]

Implements G4Curve.

Definition at line 103 of file G4CircularCurve.cc.

References G4Curve::GetPEnd(), G4Curve::GetPStart(), G4Ellipse::Init(), G4Conic::position, G4Ellipse::Project(), and G4Curve::SetBounds().

{
  G4Ellipse e;
  e.Init(position, radius, radius);
  e.SetBounds(GetPStart(), GetPEnd());
 
  return e.Project(tr);
}

G4bool G4CircularCurve::Tangent	(	G4CurvePoint &	cp,
		G4Vector3D &	v
	)			[virtual]

Implements G4Curve.

Definition at line 114 of file G4CircularCurve.cc.

References G4CurvePoint::GetPoint(), G4Conic::GetPosition(), G4Axis2Placement3D::GetPX(), G4Axis2Placement3D::GetPY(), and G4Axis2Placement3D::GetToPlacementCoordinates().

{
  // The tangent is computed from the 3D point representation
  // for all conics. An alternaive implementation (based on
  // the parametric point) might be worthwhile adding
  // for efficiency.
  
  const G4Axis2Placement3D& pos= *(GetPosition());
  G4Point3D p= pos.GetToPlacementCoordinates() * cp.GetPoint();
  
  v= -p.y()*pos.GetPX() + p.x()*pos.GetPY();
  return true;
}

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

• G4CircularCurve.hh
• G4CircularCurve.icc
• G4CircularCurve.cc

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