Grasshopper

algorithmic modeling for Rhino

summation?

Hi all,

Is there a way to do a mathematical summation?  I'd like to make points along a spiral of Theodorus (http://en.wikipedia.org/wiki/Spiral_of_Theodorus), and thus need to rotate vectors by a summed angle.

To calculate total angle at each triangle, I need to be able to input this equation into Grasshopper:

\varphi\left (k\right)=\sum_{n=1}^k\varphi_n.


where

\varphi_n=\arctan\left(\frac{1}{\sqrt{n}}\right).




Thanks!!

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Replies to This Discussion

Permalink Reply by Lian on May 6, 2010 at 8:23pm
Oh! I just found the "Mass Addition" tool. Oops--nevermind!

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