BSpline Curve Form | |
Forme de courbe Bspline |
The IfcBSplineCurveForm represents a part of a curve of some sppecific form.
NOTE Definition according to ISO/CD 10303-42:1992
This type is used to indicate that the B-spline curve represents a part of a curve of some specific form.
NOTE Type adapted from b_spline_curve_form defined in ISO 10303-42.
HISTORY New type in IFC2x2.
Constant | Description |
---|---|
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. |
<xs:simpleType name="IfcBSplineCurveForm">
<xs:restriction base="xs:string">
<xs:enumeration value="polyline_form"/>
<xs:enumeration value="circular_arc"/>
<xs:enumeration value="elliptic_arc"/>
<xs:enumeration value="parabolic_arc"/>
<xs:enumeration value="hyperbolic_arc"/>
<xs:enumeration value="unspecified"/>
</xs:restriction>
</xs:simpleType>
TYPE IfcBSplineCurveForm = ENUMERATION OF (
POLYLINE_FORM,
CIRCULAR_ARC,
ELLIPTIC_ARC,
PARABOLIC_ARC,
HYPERBOLIC_ARC,
UNSPECIFIED);
END_TYPE;