I can’t seen to find the Rhinocommon difference between UnrollSrf and UnrollSrvUV and the default seems to be UnrollSrf which gives the same result as manually using UnrollSurf. However, when unrolling sheet metal, with explode turned off some of my unrolled flat polysurface parts have a 0.0012" sliding offset compared to being perfectly aligned in the 3D polysurface:
Flat pattern of the hole near its bend:
My Rhino tolerance is 0.0001" and I tried that for Rhinocommon/Python Unroller command with absolute and relative tolerance also set to 0.0001".
So I can avoid the offset error using UnrollSrfUV in Rhino but cannot access this command in Rhinocommon. I’d prefer if the normal command would work actually, in case any of my surfaces due to editing have become skew a bit in their UV structure.
Sheet Metal.3dm (330.0 KB)
I’m using Rhino 7 WIP.
I see a seemingly new developable surface class in Rhinocommon but not unroll method and certainly it’s not for polysurfaces anyway.