8.9.2.3 IfcBSplineCurveForm
8.9.2.3.1 Semantic definition
The IfcBSplineCurveForm represents a part of a curve of some sppecific form.
8.9.2.3.2 Type values
| 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. |
8.9.2.3.3 Formal representation
TYPE IfcBSplineCurveForm = ENUMERATION OF
(CIRCULAR_ARC
,ELLIPTIC_ARC
,HYPERBOLIC_ARC
,PARABOLIC_ARC
,POLYLINE_FORM
,UNSPECIFIED);
END_TYPE;