Hey everyone,


I'm designing a UAV in Rhino 5 for Mac OSX, and currently my model consists of various block instances representing electrical components/avionics. I'm trying to do a mass and balance analysis where I would like to be able to use the Volume Centroid command in Rhino to approximate the mass c.g. of the individual components with respect to the coordinate system used in the aircraft model. The problem is that there doesn't seem to be a way to get the centroids of block instances since Rhino won't recognize them as solids, which is what is prompted for in the Volume Centroid command.


Any ideas on a work around or solution?

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Hello Brock,

the Orca3D plug-in will do waht yuo are looking for.  However, its running under MacOSX is not supported, as is the case for many plug-is, due to the Windows/macOSX incompatible development environment.

Orca 3D will run under Window emulation modes on the Mac?

Thanks ndar. I have a friend who has access to a Windows version of Rhino, so I'll give it a try. It looks like it is pretty expensive, but the evaluation period should be long enough to get done what is needed. Thanks again.

Hi Brock- you can BlockEdit the block and get the Properties of the objects while in that command- I am assuming this works the same as the Windows BlockEdit.... I cannot check it at the moment.



Pascal, my current version of Rhino for Mac (Rhinoceros 5.0 Wenatchee 2013-06-25) doesn't seem to implement that command even though it is shown in the online documentation. Perhaps it's another Windows/Mac discrepancy, or maybe I'm looking for it in the wrong place/way. I'll keep looking around for it, but if you happen to find it, I'd love to know where.

UPDATE: I've tried typing the command and looking for it in the menus. Where the documentation says it's supposed to be, the menu only shows the following...

...so I'm thinking it might not be in available for Mac users.


Well, the picture didn't show up, but basically it's not in the menus.



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