Asking a queastion about flexible arc

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Permalink Reply by Nenov Ivo on October 20, 2014 at 1:52pm

Hello Ali,

You can find in the attached file an example of a 2d curve and the way to make it with the expression component of grasshopper... I didn't find the "Parametric curve" of the fern function so i've put a hyperbolic spiral. You can check that french website :http://www.mathcurve.com/ who's referencing almost all 3D, 2D curves and surfaces, a lot of very awesome things. You search for "paramétrisation cartésienne" that's the name of parametric curve in french and that's what you need ! 

Attachments:

• HyperbolicSpiral.gh, 7 KB

Permalink Reply by Ali-Haung on October 20, 2014 at 11:32pm

Thanks you Nenov : ) 

I found a parametric curve`s image on the website you attached to me~(http://www.mathcurve.com/courbes2d/intrinsequech.gif).This parametric formula is indeed what I am finding for.

I am Sorry to bother you.....But can I ask you how to make it with grasshopper?Because the length of curve can`t not be changed in the action,if I want to  simulate the function of fern.

Thanks~

http://www.mathcurve.com/courbes2d/pseudospirale/pseudospirale.shtml

 

Permalink Reply by Nenov Ivo on October 21, 2014 at 5:12am

Here's a try but you have to play with the parameters and change the range of t, u and d, i think you can play with negative numbers too!!

Attachments:

• FresnelInt.gh, 6 KB

Permalink Reply by Ali-Haung on October 21, 2014 at 8:43am

Thanks you very much Nenov ~~