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:
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.Figure 8.9.3.46.A
The inherited attributes are interpreted as
SELF\IfcElementarySurface.Position defines the location and orientation of the planar surface.
SELF\IfcElementarySurface.Position.Location defines a point on the planar surface.
SELF\IfcElementarySurface.Position.P[3] defines the normal of the planar surface.
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.
Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.
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.
