IfcPlane

Definition from ISO/CD 10303-42:1992: A plane is an unbounded surface with a constant normal. A plane is defined by a point on the plane and the normal direction to the plane. The data is to be interpreted as follows:

C = SELF\IfcElementarySurface.Position.Location

x = SELF\IfcElementarySurface.Position.P[1]

y = SELF\IfcElementarySurface.Position.P[2]

z = SELF\IfcElementarySurface.Position.P[3] => normal to plane

and the surface is parameterized as:

where the parametric range is -∞ < u,v < ∞ .

In the above parameterization the length unit for the unit vectors x and y is derived from the context of the plane.

NOTE Corresponding STEP entity: plane. Please refer to ISO/IS 10303-42:1994, p.69 for the final definition of the formal standard.

HISTORY New class in IFC Release 1.5

EXPRESS specification:

ENTITY IfcPlane

SUBTYPE OF (

IfcElementarySurface);

END_ENTITY;

Inheritance graph

ENTITY IfcPlane;

ENTITY IfcRepresentationItem;

INVERSE

LayerAssignments

SET OF IfcPresentationLayerAssignment FOR AssignedItems;

StyledByItem

SET [0:1] OF IfcStyledItem FOR Item;

ENTITY IfcGeometricRepresentationItem;

ENTITY IfcSurface;

ENTITY IfcElementarySurface;

Position

IfcAxis2Placement3D;

DERIVE

Dim

IfcDimensionCount := Position.Dim;

ENTITY IfcPlane;

END_ENTITY;