IGESGeom_ConicArc Class Reference

defines IGESConicArc, Type <104> Form <0-3> in package IGESGeom
A conic arc is a bounded connected portion of a parent
conic curve which consists of more than one point. The
parent conic curve is either an ellipse, a parabola, or
a hyperbola. The definition space coordinate system is
always chosen so that the conic arc lies in a plane either
coincident with or parallel to XT, YT plane. Within such
a plane a conic is defined by the six coefficients in the
following equation.
A*XT^2 + B*XT*YT + C*YT^2 + D*XT + E*YT + F = 0

#include <IGESGeom_ConicArc.hxx>

Inheritance diagram for IGESGeom_ConicArc:

Public Member Functions
	IGESGeom_ConicArc ()
void	Init (const Standard_Real A, const Standard_Real B, const Standard_Real C, const Standard_Real D, const Standard_Real E, const Standard_Real F, const Standard_Real ZT, const gp_XY &aStart, const gp_XY &anEnd)
	This method is used to set the fields of the class ConicalArc
Standard_Boolean	OwnCorrect ()
	sets the Form Number equal to ComputedFormNumber, returns True if changed
Standard_Integer	ComputedFormNumber () const
	Computes the Form Number according to the equation 1 for Ellipse, 2 for Hyperbola, 3 for Parabola
void	Equation (Standard_Real &A, Standard_Real &B, Standard_Real &C, Standard_Real &D, Standard_Real &E, Standard_Real &F) const
Standard_Real	ZPlane () const
	returns the Z displacement of the arc from XT, YT plane
gp_Pnt2d	StartPoint () const
	returns the starting point of the arc
gp_Pnt	TransformedStartPoint () const
	returns the starting point of the arc after applying Transf. Matrix
gp_Pnt2d	EndPoint () const
	returns the end point of the arc
gp_Pnt	TransformedEndPoint () const
	returns the end point of the arc after applying Transf. Matrix
Standard_Boolean	IsFromEllipse () const
	returns True if parent conic curve is an ellipse
Standard_Boolean	IsFromParabola () const
	returns True if parent conic curve is a parabola
Standard_Boolean	IsFromHyperbola () const
	returns True if parent conic curve is a hyperbola
Standard_Boolean	IsClosed () const
	returns True if StartPoint = EndPoint
gp_Dir	Axis () const
	Z-Axis of conic (i.e. [0,0,1])
gp_Dir	TransformedAxis () const
	Z-Axis after applying Trans. Matrix
void	Definition (gp_Pnt &Center, gp_Dir &MainAxis, Standard_Real &rmin, Standard_Real &rmax) const
	Returns a Definition computed from equation, easier to use : the center of the the conic (meaningless for a parabola) (defined with Z displacement) <MainAxis> : the Main Axis of the conic (for a Circle, arbitrary the X Axis) <Rmin,Rmax> : Minor and Major Radii of the conic For a Circle, Rmin = Rmax, For a Parabola, Rmin = Rmax = the Focal Warning : the basic definition (by equation) is not very stable, limit cases may be approximative
void	TransformedDefinition (gp_Pnt &Center, gp_Dir &MainAxis, Standard_Real &rmin, Standard_Real &rmax) const
	Same as Definition, but the Location is applied on the Center and the MainAxis
void	ComputedDefinition (Standard_Real &Xcen, Standard_Real &Ycen, Standard_Real &Xax, Standard_Real &Yax, Standard_Real &Rmin, Standard_Real &Rmax) const
	Computes and returns the coordinates of the definition of a comic from its equation. Used by Definition & TransformedDefinition, or may be called directly if needed

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Constructor & Destructor Documentation

IGESGeom_ConicArc::IGESGeom_ConicArc

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)

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Member Function Documentation

gp_Dir IGESGeom_ConicArc::Axis

(

)

const

void IGESGeom_ConicArc::ComputedDefinition	(	Standard_Real &	Xcen,
		Standard_Real &	Ycen,
		Standard_Real &	Xax,
		Standard_Real &	Yax,
		Standard_Real &	Rmin,
		Standard_Real &	Rmax
	)		const

Standard_Integer IGESGeom_ConicArc::ComputedFormNumber

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)

const

void IGESGeom_ConicArc::Definition	(	gp_Pnt &	Center,
		gp_Dir &	MainAxis,
		Standard_Real &	rmin,
		Standard_Real &	rmax
	)		const

gp_Pnt2d IGESGeom_ConicArc::EndPoint

(

)

const

void IGESGeom_ConicArc::Equation	(	Standard_Real &	A,
		Standard_Real &	B,
		Standard_Real &	C,
		Standard_Real &	D,
		Standard_Real &	E,
		Standard_Real &	F
	)		const

void IGESGeom_ConicArc::Init	(	const Standard_Real	A,
		const Standard_Real	B,
		const Standard_Real	C,
		const Standard_Real	D,
		const Standard_Real	E,
		const Standard_Real	F,
		const Standard_Real	ZT,
		const gp_XY &	aStart,
		const gp_XY &	anEnd
	)

• A, B, C, D, E, F : Coefficients of the equation
  defining conic arc
  
• ZT : Parallel ZT displacement of the arc
  from XT, YT plane.
  
• aStart : Starting point of the conic arc
  
• anEnd : End point of the conic arc
  

Standard_Boolean IGESGeom_ConicArc::IsClosed

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)

const

Standard_Boolean IGESGeom_ConicArc::IsFromEllipse

(

)

const

Standard_Boolean IGESGeom_ConicArc::IsFromHyperbola

(

)

const

Standard_Boolean IGESGeom_ConicArc::IsFromParabola

(

)

const

Standard_Boolean IGESGeom_ConicArc::OwnCorrect

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)

gp_Pnt2d IGESGeom_ConicArc::StartPoint

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const

gp_Dir IGESGeom_ConicArc::TransformedAxis

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)

const

void IGESGeom_ConicArc::TransformedDefinition	(	gp_Pnt &	Center,
		gp_Dir &	MainAxis,
		Standard_Real &	rmin,
		Standard_Real &	rmax
	)		const

gp_Pnt IGESGeom_ConicArc::TransformedEndPoint

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const

gp_Pnt IGESGeom_ConicArc::TransformedStartPoint

(

)

const

Standard_Real IGESGeom_ConicArc::ZPlane

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)

const

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

• IGESGeom_ConicArc.hxx