A 2D polyline (IfcPolyline, IfcIndexedPolyCurve, tessellated ellipses, trimmed-curve arcs, grid axis lines).
IfcPolyline
IfcIndexedPolyCurve
Flat [x0, y0, x1, y1, …] plan-view coordinates.
[x0, y0, x1, y1, …]
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 polyline (
IfcPolyline,IfcIndexedPolyCurve, tessellated ellipses, trimmed-curve arcs, grid axis lines).