IFC 4.3.0.1 (IFC4X3) development

8.12.2.16 IfcSurfaceSide

8.12.2.16.1 Semantic definition

IfcSurfaceSide is a denotion of whether negative, positive or both sides of a surface are being referenced.

8.12.2.16.2 Type values

Type Description
BOTH

Both, positive and negative side.

NEGATIVE

The side of a surface which is in the opposite direction than the surface normal derived from the mathematical definition.

POSITIVE

The side of a surface which is in the same direction as the surface normal derived from the mathematical definition.

Table 8.12.2.16.A

8.12.2.16.3 Formal representation

TYPE IfcSurfaceSide = ENUMERATION OF
	(BOTH
	,NEGATIVE
	,POSITIVE);
END_TYPE;

8.12.2.16.4 References

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