deleting duplicate breps

Hi everybody,

I've some issues with finding and deleting duplicate breps. From previous discussions I found a script that could do the same with points which I modified to work with breps (sorting and shifting a list). Right now I've used the volume of a brep to identify whether or not it has duplicates. It works only partially, most duplicates are removed but others are still there. Playing a bit with the step size of the series seems to make a bit of difference but is not sufficient (differences in volumes in 3dmodel are big). Any ideas on how to solve this?

Thanks

Bas

Attachments:

101114 duplicate brep.3dm, 4.3 MB
101114 duplicate brep.ghx, 1.8 MB

Replies to This Discussion

Permalink Reply by David Reeves on November 14, 2010 at 7:52am

Hi Bas,

I've got a pair of vb components for this sort of thing. They get a bit heavy with a large set but I've found them to be pretty reliable. They basically check for volume and centroid equality (within adjustable tolerance). The only difference between the two components is the output structure. One spits out a list with an index map incase you need to rebuild the duplicates later. The other maintains the incoming tree structure while removing duplicates.

Attachments:

remove_dup_brep.ghx, 112 KB

Permalink Reply by Bas on November 14, 2010 at 1:35pm

Hi David,
Thanks a lot! Did a couple of test runs but it works perfectly for the job, also with the tolerance makes my life a lot easier. I think I owe you a couple of beers ;-)
Bas

Permalink Reply by Ivan Kiryakov on May 30, 2012 at 9:43am

thx very much , this is very helpful !

Permalink Reply by qiushi on January 2, 2014 at 12:45pm

how to use this script in grasshopper?

thanks!

Permalink Reply by Felipe Gutierrez on March 15, 2017 at 4:18pm

Yeah a couple of beers we owe you. You might've gotten me into VB scripting or not really I want to digo into c++ for it to be 10X faster , nice though. Cheers!

Permalink Reply by Thomas Sicouri on November 25, 2017 at 10:34am