guess this is just a glitch in rhino 7 which will probably be resolved in one of the next updates, in any case for the record:
I’m experiencing weird issues with the orientation of surfaces on imported solids (from solidworks, both as .stp and .sldprt) in rhino 7.
First noticed this since we use a grasshopper definition to orient the largest surface of a brep on the xy plane and suddenly some objects ended up below zero.
Showing the backface color confirms this:
Sorry for the wrong category, hier is the .sldprt and the rhino7 .3dm dogbone_torture.3dm (165.7 KB) dogbone_torture.SLDPRT (131.9 KB)
initially thought it might be a solidworks issue, but rhino 6 seems to open it correct.
Just wanted to mention, that I’m seeing this in V6 as well - but I guess that it’ll be fixed for V7 only. The parts are closed polysurfaces, but some normals are flipped - really weird! These were imported directly from a SWX assembly. two parts imported from SWX.3dm (932.2 KB)
I have the same problem in RH7, some surfaces are flipped (red surface). I am pretty sure the solids are watertight. In RH6 this didnt happened at least what I can recall. I recently upgraded Solidworks from 2015 to 2020. I cannot open SW2020 in RH6. Would be nice to have possibility to open SW2020 in RH6.
After installing 7.4 service release, there is still bug in importing/opening native solidworks file. The same file exported to STEP is ok, but SLDPRT has always switched some normals. Thats pretty annoing especially with complex bodies.
I like when new versions of software have new functions. But what I do not like more is that old functions are not working the same way as before. Unfortunately, from version to version, I have bad feeling about reliability of Rhino. Rhino 5 was really great and stable, never crashed, veretyhing worked fine. 6th was sometimes crashing, many bugs in drwaing lines, localization etc. Please, dont go the way as other software vendors, when last servicepack before new release is finally stable and ready to use. I dont mind to wait another year for new version.