IfcBSplineCurveForm
Definition from ISO/CD 10303-42:1992: This type is used to
indicate that the B-spline curve represents a part of a curve of some sppeci c
form.
Enumeration:
- polyline form: A connected sequence of line segments
represented by degree 1 B-spline basis functions.
- 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.
- parabolic arc: An arc of finite length of a parabola
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.
- unspecified: A B-spline curve for which no particular form is
specified.
NOTE: Corresponding STEP type:
b_spline_curve_form. Please refer to ISO/IS 10303-42:1994, p. 15 for the final
definition of the formal standard.
HISTORY: New type in Release IFC2x
Edition 2.
EXPRESS specification:
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| TYPE IfcBSplineCurveForm = ENUMERATION OF
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| (
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POLYLINE_FORM,
CIRCULAR_ARC,
ELLIPTIC_ARC,
PARABOLIC_ARC,
HYPERBOLIC_ARC,
UNSPECIFIED);
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