Builds a surface of conic arcs spanning between two rail curves, one arc per station along a spine that may curve. Each arc lies in a plane square to the spine and bulges toward the spine point, so the spine sets the outline; rho sets how full the arc is. The result is an open surface with material on the spine side; intersect it with a closed solid to get a finished part.
Curve where each arc begins.
Curve where each arc ends.
Path of the sweep and the apex of every arc. It may curve; the arcs lie in planes square to it.
Wired rho; takes precedence over the typed value.
Values the block gives besides its output. The editor lists them under Properties, and an input can read one by reference.