8.9.2.6 IfcCurveOnSurface
8.9.2.6.1 Semantic definition
The IfcCurveOnSurface enables the choice of curve types on parametric surface.
{ .extDef}
NOTE Definition according to ISO/CD 10303-42:1992
A curve_on_surface is a curve on a parametric surface. It may be any of the following: > * a pcurve or
* a surface curve, including the specialised subtypes of intersection curve and seam curve, or
* a composite curve on surface.NOTE Type adapted from curve_on_surface defined in ISO 10303-42.HISTORY New type in IFC4.
The curve on surface select type collects these curves together for reference purposes.
8.9.2.6.2 Type values
Table A
8.9.2.6.3 Formal representation
TYPE IfcCurveOnSurface = SELECT
( IfcCompositeCurveOnSurface
, IfcPcurve
, IfcSurfaceCurve ) ;
END_TYPE ;
8.9.2.6.4 References
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Last change: Fix various typos
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8.9.2.6.5 Changelog
8.9.2.6.5.1 IFC4