Shell.make_shell returns Face

Question

Shell.make_shell returns Face

Closed this issue 7 months ago · 3 comments

section = Rot(90)*CenterArc((0,0), 5, 90, 180)
path = Circle(5).wire()
shell = Shell.make_shell(sweep(section, path))
print(shell.shape_type())

Face

Answer 1 · 2024-02-03T14:40:09.000Z

Shell creation uses the BRepBuilderAPI_Sewing class/SewedShape method the which has a complex return type of: a Face, a Shell, a Solid or a Compound. In this case make_shell (which is deprecated, use Shell(sweep(section,path))) is being asked to make a Shell out of a closed Compound/Face the result which can only be a single Face.

The Shell class could throw an error in this situation but that wouldn't be very helpful. Do you have a preferred behaviour?

Answer 2 · 2024-02-03T21:53:52.000Z

make_shell was deprecated a couple hours before this issue and Shell() has the same behavior. The issue is Solid(Shell()) is broken here #531

Answer 3 · 2024-02-04T01:21:18.000Z

There is nothing that can be done, this is an OCCT limitation.