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. |
8.12.2.16.3 Formal representation
TYPE IfcSurfaceSide = ENUMERATION OF
(BOTH
,NEGATIVE
,POSITIVE);
END_TYPE;