Grasshopper

algorithmic modeling for Rhino


I want to do this picture  in grasshopper  who can help me  

I have no idea. I'm a beginner in grasshopper.
 
and here is an  equation of the picture

r=1.5*cos(50*theta)+1   theta=t*360       z=0 



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Hi Chris,

first off, angles in Grasshopper are always specified in Radians, so you'll need to lose the 360 factors in your equation. See attached.

--
David Rutten
david@mcneel.com
Seattle, WA
Attachments:
thanks you're advice, but i can't open your're GHX because my ghrasshopper is old (0.6.0059)
so... can yuo mail step(how to do this) for me?

orange-0616@hotmail.com TK'S

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