A 2D circle / arc (IfcCircle).
IfcCircle
End angle in radians (2π for a full circle).
2π
Start angle in radians (0 for a full circle).
World-Y elevation in metres, or null when unresolved. See the "UNRESOLVED SCALARS" note at the top of this section — null is not 0.
null
0
A 2D circle / arc (
IfcCircle).