8.9.2.3 IfcBSplineCurveForm

8.9.2.3.1 Semantic definition

The IfcBSplineCurveForm represents a part of a curve of some sppecific form.

{ .extDef}

Type	Description
`CIRCULAR_ARC`	An arc of a circle, or a complete circle represented by a B-spline curve.
`ELLIPTIC_ARC`	An arc of an ellipse, or a complete ellipse, represented by a B-spline curve.
`HYPERBOLIC_ARC`	An arc of finite length of one branch of a hyperbola represented by a B-spline curve.
`PARABOLIC_ARC`	An arc of finite length of a parabola represented by a B-spline curve.
`POLYLINE_FORM`	A connected sequence of line segments represented by degree 1 B-spline basis functions.
`UNSPECIFIED`	A B-spline curve for which no particular form is specified.

Table A

TYPE IfcBSplineCurveForm = ENUMERATION OF
(CIRCULAR_ARC
,ELLIPTIC_ARC
,HYPERBOLIC_ARC
,PARABOLIC_ARC
,POLYLINE_FORM
,UNSPECIFIED);
END_TYPE;