Brep.CreateFromSweep Erratic Results

Scripting
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1

I am having a hard time getting this curve to sweep. Is there certain criteria I need met to get a successful sweep ? It looks like each segment is pointing in different directions. I tired to use Simplify() but that didnt do much same with rebuild. Can someone explain how sweep works fundamentally ? Is there a way to rework or rebuild the curve where it would generate a clean sweep ?

Sweep Help.gh (4.5 KB)

Thanks !

Sweep Help
Sweep Help1150×725 66.5 KB

2

Hello,
You seem to have forgotten the Internalise of the first Curve.

Internalise
Internalise903×473 54.3 KB

3

I suspect it’s because the rail curve has too sharp bends for the profile, creating a crumpled, self-intersecting surface. When in doubt, bake the rail and profile and run the normal Sweep1 command in Rhino and look at the results.