Offset Brep ERROR

Grasshopper
,
1

Its been a while but I’m still having problem about Offset Brep.
Both Rhino command and GH result the same.

Anyone has comments or workaround can resolve this?

Thanks…

Offset Brep ERROR.gh (9.5 KB)

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2

I’m not using sasquatch and the result isn’t any better with a C# script:

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Offset Brep ERROR.gh (11.7 KB)

1 Like
3

In this case, it might be better to use Shell

shel
shel1244×523 73 KB

Offset Brep ERROR0-Shell.gh (12.3 KB)

2 Likes
4

Very nice :exclamation: Same thing in Python, which the profiler says is 6+ times faster than C# :question:
(both versions are in this file)

import Rhino.Geometry as rg
import scriptcontext as sc

if (brep):
    shell = rg.Brep.CreateShell(brep, facesToRemove, distance, sc.doc.ModelAbsoluteTolerance)

CreateShell_2023Sep27a.gh (13.1 KB)

P.S. Apparently this method requires a “Closed Brep” and at least one ‘facesToRemove’?

https://developer.rhino3d.com/api/rhinocommon/rhino.geometry.brep/createshell

Parameters:

  • brep
    Type: Brep
    The solid Brep to shell.

  • facesToRemove
    Type: IEnumerable
    The indices of the Brep faces to remove. These surfaces are removed and the remainder is offset inward, using the outer parts of the removed surfaces to join the inner and outer parts.

  • distance
    Type: System.Double
    The distance, or thickness, for the shell. This is a signed distance value with respect to face normals and flipped faces.

  • tolerance
    Type: System.Double
    The offset tolerance. When in doubt, use the document’s absolute tolerance.

Returns:

  • Type: Brep[]
    An array of Brep results or None on failure.