The subject occurs up through 6.0.18016.23451, 1/16/2018. Before JoinBreps: SumSurface bar NurbsSurface bar PlaneSurface bar NurbsSurface bar RevSurface bar SumSurface bar After JoinBreps: SumSurface None NurbsSurface bar PlaneSurface bar NurbsSurface bar RevSurface bar SumSurface None UserString…

Hi @spb , Yep, I see that. Thanks for reporting. https://mcneel.myjetbrains.com/youtrack/issue/RH-43931 – Dale

Hi @dale , I am having the similar issue when using Brep.DuplicateBrep(). Under Brep.Surfaces(), I have UserData saved in PlaneSurfaces, and SumSurface. But after DuplicateBrep(), all UserData under SumSurface are gone. PlaneSurface and NurbsSurface type are ok. Geometries are simple extrusion to…

Hi @mingo1214 , I’ve bumped the YouTrack issue. – Dale

A workaround for this is to convert each SumSurface to a NurbsSurface and copy the former’s user data into the latter before performing the Brep method. If the NurbsSurfaces (created and previously present) are unique, the SumSurfaces can even be retained after the operation.

Thanks, yes, I have converted all to PlaneSurface for fixing this problem.

User strings not retained in SumSurfaces after JoinBreps

Rhino Developer

brian (Brian Gillespie) March 5, 2020, 12:37am 7

RH-43931 is fixed in the latest WIP

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User strings not retained in SumSurfaces after JoinBreps

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