Convert_ElementarySurfaceToBSplineSurface Class Reference

Root class for algorithms which convert an elementary surface (cylinder, cone, sphere or torus) into a BSpline surface (CylinderToBSplineSurface, ConeToBSplineSurface, SphereToBSplineSurface, TorusToBSplineSurface). These algorithms all work on elementary surfaces from the gp package and compute all the data needed to construct a BSpline surface equivalent to the cylinder, cone, sphere or torus. This data consists of the following: More...

#include <Convert_ElementarySurfaceToBSplineSurface.hxx>

Inheritance diagram for Convert_ElementarySurfaceToBSplineSurface:

Public Member Functions
Standard_Integer	UDegree () const
Standard_Integer	VDegree () const
	Returns the degree for the u or v parametric direction of the BSpline surface whose data is computed in this framework.
Standard_Integer	NbUPoles () const
Standard_Integer	NbVPoles () const
	Returns the number of poles for the u or v parametric direction of the BSpline surface whose data is computed in this framework.
Standard_Integer	NbUKnots () const
Standard_Integer	NbVKnots () const
	Returns the number of knots for the u or v parametric direction of the BSpline surface whose data is computed in this framework .
Standard_Boolean	IsUPeriodic () const
Standard_Boolean	IsVPeriodic () const
	Returns true if the BSpline surface whose data is computed in this framework is periodic in the u or v parametric direction.
gp_Pnt	Pole (const Standard_Integer UIndex, const Standard_Integer VIndex) const
	Returns the pole of index (UIndex,VIndex) to the poles table of the BSpline surface whose data is computed in this framework. Exceptions Standard_OutOfRange if, for the BSpline surface whose data is computed in this framework:
Standard_Real	Weight (const Standard_Integer UIndex, const Standard_Integer VIndex) const
	Returns the weight of the pole of index (UIndex,VIndex) to the poles table of the BSpline surface whose data is computed in this framework. Exceptions Standard_OutOfRange if, for the BSpline surface whose data is computed in this framework:
Standard_Real	UKnot (const Standard_Integer UIndex) const
	Returns the U-knot of range UIndex. Raised if UIndex < 1 or UIndex > NbUKnots.
Standard_Real	VKnot (const Standard_Integer UIndex) const
	Returns the V-knot of range VIndex. Raised if VIndex < 1 or VIndex > NbVKnots.
Standard_Integer	UMultiplicity (const Standard_Integer UIndex) const
	Returns the multiplicity of the U-knot of range UIndex. Raised if UIndex < 1 or UIndex > NbUKnots.
Standard_Integer	VMultiplicity (const Standard_Integer VIndex) const
	Returns the multiplicity of the V-knot of range VIndex. Raised if VIndex < 1 or VIndex > NbVKnots.

Protected Member Functions
	Convert_ElementarySurfaceToBSplineSurface (const Standard_Integer NumberOfUPoles, const Standard_Integer NumberOfVPoles, const Standard_Integer NumberOfUKnots, const Standard_Integer NumberOfVKnots, const Standard_Integer UDegree, const Standard_Integer VDegree)

Protected Attributes
TColgp_Array2OfPnt	poles
TColStd_Array2OfReal	weights
TColStd_Array1OfReal	uknots
TColStd_Array1OfInteger	umults
TColStd_Array1OfReal	vknots
TColStd_Array1OfInteger	vmults
Standard_Integer	udegree
Standard_Integer	vdegree
Standard_Integer	nbUPoles
Standard_Integer	nbVPoles
Standard_Integer	nbUKnots
Standard_Integer	nbVKnots
Standard_Boolean	isuperiodic
Standard_Boolean	isvperiodic

Detailed Description

Root class for algorithms which convert an elementary surface (cylinder, cone, sphere or torus) into a BSpline surface (CylinderToBSplineSurface, ConeToBSplineSurface, SphereToBSplineSurface, TorusToBSplineSurface). These algorithms all work on elementary surfaces from the gp package and compute all the data needed to construct a BSpline surface equivalent to the cylinder, cone, sphere or torus. This data consists of the following:

• degrees in the u and v parametric directions,
• periodic characteristics in the u and v parametric directions,
• a poles table with associated weights,
• a knots table (for the u and v parametric directions) with associated multiplicities. The abstract class ElementarySurfaceToBSplineSurface provides a framework for storing and consulting this computed data. This data may then be used to construct a Geom_BSplineSurface surface, for example. All those classes define algorithms to convert an ElementarySurface into a B-spline surface. This abstract class implements the methods to get the geometric representation of the B-spline surface. The B-spline representation is computed at the creation time in the sub classes. The B-spline surface is defined with its degree in the parametric U and V directions, its control points (Poles), its weights, its knots and their multiplicity. KeyWords : Convert, ElementarySurface, BSplineSurface.

Constructor & Destructor Documentation

Convert_ElementarySurfaceToBSplineSurface()

Convert_ElementarySurfaceToBSplineSurface::Convert_ElementarySurfaceToBSplineSurface ( const Standard_Integer  NumberOfUPoles, const Standard_Integer  NumberOfVPoles, const Standard_Integer  NumberOfUKnots, const Standard_Integer  NumberOfVKnots, const Standard_Integer  UDegree, const Standard_Integer  VDegree  )

protected

Member Function Documentation

IsUPeriodic()

Standard_Boolean Convert_ElementarySurfaceToBSplineSurface::IsUPeriodic

(

)

const

IsVPeriodic()

Standard_Boolean Convert_ElementarySurfaceToBSplineSurface::IsVPeriodic

(

)

const

Returns true if the BSpline surface whose data is computed in this framework is periodic in the u or v parametric direction.

NbUKnots()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::NbUKnots

(

)

const

NbUPoles()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::NbUPoles

(

)

const

NbVKnots()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::NbVKnots

(

)

const

Returns the number of knots for the u or v parametric direction of the BSpline surface whose data is computed in this framework .

NbVPoles()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::NbVPoles

(

)

const

Returns the number of poles for the u or v parametric direction of the BSpline surface whose data is computed in this framework.

Pole()

gp_Pnt Convert_ElementarySurfaceToBSplineSurface::Pole	(	const Standard_Integer	UIndex,
		const Standard_Integer	VIndex
	)		const

Returns the pole of index (UIndex,VIndex) to the poles table of the BSpline surface whose data is computed in this framework. Exceptions Standard_OutOfRange if, for the BSpline surface whose data is computed in this framework:

• UIndex is outside the bounds of the poles table in the u parametric direction, or
• VIndex is outside the bounds of the poles table in the v parametric direction.

UDegree()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::UDegree

(

)

const

UKnot()

Standard_Real Convert_ElementarySurfaceToBSplineSurface::UKnot

(

const Standard_Integer

UIndex

)

const

Returns the U-knot of range UIndex. Raised if UIndex < 1 or UIndex > NbUKnots.

UMultiplicity()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::UMultiplicity

(

const Standard_Integer

UIndex

)

const

Returns the multiplicity of the U-knot of range UIndex. Raised if UIndex < 1 or UIndex > NbUKnots.

VDegree()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::VDegree

(

)

const

Returns the degree for the u or v parametric direction of the BSpline surface whose data is computed in this framework.

VKnot()

Standard_Real Convert_ElementarySurfaceToBSplineSurface::VKnot

(

const Standard_Integer

UIndex

)

const

Returns the V-knot of range VIndex. Raised if VIndex < 1 or VIndex > NbVKnots.

VMultiplicity()

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::VMultiplicity

(

const Standard_Integer

VIndex

)

const

Returns the multiplicity of the V-knot of range VIndex. Raised if VIndex < 1 or VIndex > NbVKnots.

Weight()

Standard_Real Convert_ElementarySurfaceToBSplineSurface::Weight	(	const Standard_Integer	UIndex,
		const Standard_Integer	VIndex
	)		const

Returns the weight of the pole of index (UIndex,VIndex) to the poles table of the BSpline surface whose data is computed in this framework. Exceptions Standard_OutOfRange if, for the BSpline surface whose data is computed in this framework:

• UIndex is outside the bounds of the poles table in the u parametric direction, or
• VIndex is outside the bounds of the poles table in the v parametric direction.

Field Documentation

isuperiodic

Standard_Boolean Convert_ElementarySurfaceToBSplineSurface::isuperiodic

protected

isvperiodic

Standard_Boolean Convert_ElementarySurfaceToBSplineSurface::isvperiodic

protected

nbUKnots

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::nbUKnots

protected

nbUPoles

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::nbUPoles

protected

nbVKnots

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::nbVKnots

protected

nbVPoles

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::nbVPoles

protected

poles

TColgp_Array2OfPnt Convert_ElementarySurfaceToBSplineSurface::poles

protected

udegree

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::udegree

protected

uknots

TColStd_Array1OfReal Convert_ElementarySurfaceToBSplineSurface::uknots

protected

umults

TColStd_Array1OfInteger Convert_ElementarySurfaceToBSplineSurface::umults

protected

vdegree

Standard_Integer Convert_ElementarySurfaceToBSplineSurface::vdegree

protected

vknots

TColStd_Array1OfReal Convert_ElementarySurfaceToBSplineSurface::vknots

protected

vmults

TColStd_Array1OfInteger Convert_ElementarySurfaceToBSplineSurface::vmults

protected

weights

TColStd_Array2OfReal Convert_ElementarySurfaceToBSplineSurface::weights

protected

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

• Convert_ElementarySurfaceToBSplineSurface.hxx