Removing overlapping faces

Is there a quick way to retreive and delete duplicate (overlapping) faces? I have a 3d CA script I wrote in rhinoscript but I want to use grasshopper to put the cells in as breps and then delete all the overlapping faces so as to open up the interior spaces. Any way I can do this without writing something in vb?

Replies to This Discussion

Permalink Reply by Aaron Coffman on September 24, 2010 at 10:53am

Nobody?

Permalink Reply by Daniel Piker on September 24, 2010 at 1:46pm

If the overlapping faces are identical, then their centroids will be too. So you can check if the centroid is duplicated and cull the faces accordingly.
David Reeves posted a useful definition on the Kangaroo forum that detects duplicates and outputs indices :
http://groups.google.co.uk/group/kangaroophysics/browse_thread/thre...
http://kangaroophysics.googlegroups.com/web/duplicate_rebuild.ghx?g...

Of course it is possible to have different faces with the same centroid, but if you are working with a grid of cubic cells I guess this isn't an issue

Permalink Reply by Sina Haghighizadeh on May 11, 2017 at 3:59am

Greetings Mr. Piker,

The file upload option in Google Groups is disabled, so I can not access the definition mentioned above. Is it possible for you to upload it here?

thanks in advance,

Sina

Permalink Reply by Aaron Coffman on September 24, 2010 at 3:32pm

Thanks much appreciated, didn't even think about using duplicated centroids as a cull pattern. The model is just a cellular automata script done for a class in rhinoscript but I wanted to bring it in to grasshopper to remove the inside repeating faces.

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