IFC (IFC4X3_ADD2) under development IfcPlane

AbV ⓘ Semantic definition

The planar surface is an unbounded surface in the direction of x and y. Bounded planar surfaces are defined by using a subtype of IfcBoundedSurface with BasisSurface being a plane.

  C = Position.Location
  x = Position.P[1]
  y = Position.P[2]
  z = Position.P[3] => normal to plane
and the surface is parameterized as:
formula 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.

The inherited attributes are interpreted as Entity inheritance Attributes

# Attribute Type Description
IfcRepresentationItem (2)
LayerAssignment SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems

Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.

StyledByItem SET [0:1] OF IfcStyledItem FOR Item

Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.

IfcSurface (1)
* Dim IfcDimensionCount

This attribute is formally derived.


The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item.

Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes
IfcElementarySurface (1)
1 Position IfcAxis2Placement3D

The position and orientation of the surface. This attribute is used in the definition of the parameterization of the surface.

Table Examples Formal representation

 SUBTYPE OF (IfcElementarySurface);
END_ENTITY; References

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