IfcArbitraryClosedProfileDef
Definition
from IAI: The closed profile IfcArbitraryClosedProfileDef
defines an arbitrary two-dimensional profile for the use within the
swept surface geometry, the swept area solid or a sectioned spine. It
is given by an outer
boundary from which the surface or solid can be constructed.
HISTORY: New entity
in IFC Release 1.5. Entity has been renamed from IfcArbitraryProfileDef
in IFC Release 2x.
Informal
proposition:
- The OuterCurve
has to be a closed curve.
- The OuterCurve
shall not intersect.
Illustration:
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Position
The OuterCurve
is defined in the underlying coordinate system. The underlying
coordinate system is defined by the swept surface or swept area solid
that uses the profile definition. It is the xy plane of either:
- IfcSweptSurface.Position
- IfcSweptAreaSolid.Position
or in case of sectioned spines the xy plane of each list member of IfcSectionedSpine.CrossSectionPositions
Parameter
The OuterCurve
attribute defines a two dimensional closed bounded curve.
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Table: Definition of arbitrary
closed profile definition
EXPRESS specification:
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| ENTITY IfcArbitraryClosedProfileDef
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| WR1
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:
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OuterCurve.Dim = 2;
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| WR2
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NOT('IFCGEOMETRYRESOURCE.IFCLINE' IN TYPEOF(OuterCurve));
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| WR3
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NOT('IFCGEOMETRYRESOURCE.IFCOFFSETCURVE2D' IN TYPEOF(OuterCurve));
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Attribute definitions:
| OuterCurve
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Bounded curve, defining the outer boundaries of the arbitrary profile.
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Formal Propositions:
| WR1
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The curve used for the outer curve definition shall have the dimensionality of 2.
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| WR2
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The outer curve shall not be of type IfcLine as IfcLine is not a closed curve.
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| WR3
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The outer curve shall not be of type IfcOffsetCurve2D as it should not be defined as an offset of another
curve.
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Inheritance graph
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| ENTITY IfcArbitraryClosedProfileDef;
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