Grasshopper

algorithmic modeling for Rhino

Culling a tree based on index and branch parity

Looking for a clean way to cull members in a tree if their index parity doesn't match their branch parity. I.e. if their branch is even, their index must be even; oddindexed elements are culled.

Put in matrix terms, with row i and column j, to keep an element (i%2 == j%2) must be true.

It's been a while since I've used GH, so I'm heading toward a really ugly solution probably using all the wrong components :P

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Replies to This Discussion

Permalink Reply by David Rutten on February 4, 2015 at 4:22pm

Use Split Tree with these selection rules:

{0,2,...}[0,2,...]
{1,3,...}[1,3,...]

Permalink Reply by Mark Bank on February 5, 2015 at 1:59am

That's some nice looking compactness. Much obliged, David!

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