Grasshopper

algorithmic modeling for Rhino

Need efficient method for Brep Doughnuts

I have been searching for a few hours now, trying to think up an efficient method for getting Brep "doughnuts" (as shown in the first image).

Currently, I'm extruding one closed curve, then a second closed curve, capping both, and then using a boolean difference. This method takes a while to churn, whenever I recompute the Grasshopper solution. The metahopper analysis shows that 40% of my computation time is due to my two SDiff nodes. Another 40% is from the various extrude and cap nodes.

Anyone know of a "lighter" way to make these types of forms? Either with native Grasshopper components or with C#.. I am going to be working with a lot of them, doing facade design with punched windows.. 

Thanks!

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Permalink Reply by Andrew Heumann on August 17, 2017 at 3:48pm

in the case of the kinds of geometries you're drawing here, it will be about 4-6x faster to first create a planar boundary surface with the outer rectangle and the inner rectangle and then extrude that, instead of creating two solids and booleaning them. 

Permalink Reply by Matthew Breau on August 17, 2017 at 4:06pm

Thanks, I'll give that a try

Permalink Reply by Matthew Breau on August 18, 2017 at 2:56pm

Its much much quicker! Ty

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