Grasshopper

algorithmic modeling for Rhino

Need Help Creating Perforated Surface

Hello! I need help creating a perforated surface. I have the curves for the perforation generated, but I can't seem to make the holes from the curves. I have tried to project the curves onto the surface and use surface split, but that method ended up taking more than an hour. I have attached an image of what I have so far. Is there a more efficient way of achieving a perforated surface?

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Replies to This Discussion

Permalink Reply by Joseph Oster on December 31, 2015 at 8:18am

'SrfSplit' can be extremely slow when you flatten a long list of curves that are fed to it.  It is very fast if you divide the surface first, then cut one hole in each sub-surface, then Brep Join the sub-surfaces back together again.

Permalink Reply by Joseph Oster on December 31, 2015 at 9:25am

The 'SubSrf'/'SrfSplit'/re-'Join' method - 900 holes in less than two seconds:

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Permalink Reply by Rutger D on December 31, 2015 at 8:29am

William,

use the outline and the projected curves to create a boundary surface. Make sure to flatten the input.

Permalink Reply by Joseph Oster on December 31, 2015 at 9:03am

Nice!  Works much better than I expected, as long as the holes don't overlap.  680 holes in ~1 sec.

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Permalink Reply by William Zheng on December 31, 2015 at 11:58am

Cool! Thank you to both of you for the solutions!

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