OdDbNurbSurface Class

Class Hierarchy

Syntax

C++

class OdDbNurbSurface : public OdDbSurface;

File

DbNurbSurface.h

Description

This class implements a three-dimensional NURB surface entity.

Group

OdDb Classes

Public Methods

	Name	Description
	OdDbNurbSurface	Creates an OdDbNurbSurface object.

OdDbNurbSurface Methods

	Name	Description
	convertFrom	Creates a surface from a specified surface with conversion.
	dwgInFields	OdDbObject methods
	dwgOutFields	Writes the .dwg file data of this object.
	dxfInFields	Reads the DXF data of this object.
	dxfOutFields	Writes the DXF data of this object.
	evaluate	This is the overview for the evaluate method overload.
	get	Gets all NURB data.
	getControlPointAt	Returns the control point (in WCS coordinates) at the specified position in the control points vector.
	getControlPoints	Returns the control points and the quantity of control points in both u and v directions.
	getDegreeInU	Returns the degree of NURBS surface in the u direction.
	getDegreeInV	Returns the degree of NURBS surface in the v direction.
	getIsolineAtU	Returns the isolines at a specified u value. The isolines are created in the v direction. If there are holes in the surface, there could be a number of isoline segments at a specified u value.
	getIsolineAtV	Returns the isolines at a specified v value. The isolines are created in the u direction. If there are holes in the surface, there could be a number of isoline segments at a specified v value.
	getNormal	Returns the normal vector at the specified parameter location ([u, v]).
	getNumberOfControlPointsInU	Returns the quantity of control points in the u direction.
	getNumberOfControlPointsInV	Returns the quantity of control points in the v direction.
	getNumberOfKnotsInU	Returns the quantity of knots in the u direction.
	getNumberOfKnotsInV	Returns the quantity of knots in the v direction.
	getNumberOfSpansInU	Returns the simple patches in the u direction.
	getNumberOfSpansInV	Returns the simple patches in the v direction.
	getParameterOfPoint	Returns the u and v parameter for a point on the surface.
	getPeriodInU	Returns the period value in the u direction for the surface. Returned value is valid only if the surface is periodic in the u direction.
	getPeriodInV	Returns the period value in the v direction for the surface. Returned value is valid only if the surface is periodic in the v direction.
	getUKnots	Returns the knot vector in the u direction.
	getVKnots	Returns the knot vector in the v direction.
	getWeight	Returns the weight at a specified position (uIndex, vIndex) in the weights array. Returns valid weight value only when the surface is rational.
	InsertControlPointsAtU	Inserts a row of control points at the given u knot parameter.
	InsertControlPointsAtV	Inserts a row of control points at the given v knot parameter.
	InsertKnotAtU	Inserts a knot at the specified u parameter. The knot insertion doesn't modify the shape of the surface. It will add a new row of control points in the v direction and adjust the local control point's location.
	InsertKnotAtV	Inserts a knot at the specified v parameter. The knot insertion doesn't modify the shape of the surface. It will add a new row of control points in the u direction and adjust the local control point's location.
	isClosedInU	Determines whether the surface is closed in the u direction.
	isClosedInV	Determines whether the surface is closed in the v direction.
	isPeriodicInU	Determines whether the surface is periodic in the u direction.
	isPeriodicInV	Determines whether the surface is periodic in the v direction.
	isPlanar	Determines whether the surface is planar. If the surface is planar, also returns the plane information and normal. If the surface is planar, the method returns true via the bIsPlanar parameter, otherwise the method returns false.
	isPointOnSurface	Determines whether a specified point is on the surface. If specified point is on the surface, the method returns true via bOnSurface, otherwise the method returns false.
	isRational	Determines whether the surface is rational. If the surface is rational, the method returns true, otherwise the method returns false.
	modifyPositionAndTangent	Adjusts the location and tangent of a point on the surface with the specified parameter ([u, v]). The local control points are adjusted accordingly. If the pointer uDeriv and vDeriv are equal to NULL, then only the location of the point is adjusted.
	ODDB_DECLARE_MEMBERS	virtual ~OdDbNurbSurface();
	rebuild	Rebuilds the NURBS surface with a specified new degree and quantity of control points in the u and v directions. This operation modifies the shape of the surface.
	RemoveControlPointsAtU	Removes a row of control points at the specified position in the control points array. The method modifies the shape of the surface.
	RemoveControlPointsAtV	Removes a row of control points at the specified position in the control points array. The method modifies the shape of the surface.
	set	Set new data for the existing NURBS surface.
	setControlPointAt	Sets a new control point (in WCS coordinates) at a specified position in the control points vector.
	setControlPoints	Sets the control points.
	setWeight	Sets the weight value at a specified position in the weights array. If the surface is not rational, the method does nothing.

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