Exponential Division of Curves using Python

Hey guys,

I have 10 curves and I want to divide them in increasing order:

1st curve - 1 division

2nd curve - 2 divisions

3rd curve - 3 divisions

I managed to do it in Grasshopper and trying to recreate it in GhPython

In Python I tried to use For loop, but it divides all the curves 10 times. Seems that there is a problem in data matching.

Here is the code:

import rhinoscriptsyntax as rs

ptList = []

for i in range(1,10):
pt = rs.DivideCurve(crv, i)
print (i)
ptList.append(pt)

a = pt

Here is the screenshot of GH scrypt and the result I want.

Thanks!

Attachments:

1.PNG, 96 KB

Replies to This Discussion

Permalink Reply by Ayk Martirosyan on July 18, 2016 at 4:09am

Thanks, Tom!

I am exploring Python, thus, trying to recreate the scrypt made in GH, but using Python. Rhinocommon is the next to dive into.

Permalink Reply by Giulio Piacentino on July 18, 2016 at 4:55am

Hi Ayk

this is an example that follows Tom's nice illustration, but this time in Python and using rhinoscriptsyntax. I also took a powerful Python function that transforms nested lists of lists into GH DataTrees, thereby relieving you from all datatree code pain. (:

I hope this helps,

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

Attachments:

rhinoscript-example.gh, 7 KB

Permalink Reply by Ayk Martirosyan on July 18, 2016 at 5:27am

Hi Giulio,

Thanks a lot for help! That was what I wanted. Actually, I didn't know that you can easily import Grasshopper as a library.

What if you want to divide curves in the geometric progression? Let's say first curve is divided by 1, the second one by 3, the third one by 9, then by 27 and etc. I tried to raise (i+start) to the power of 3: 3**(i+start). It kinda worked, but not sure if it's the correct way.

Permalink Reply by Giulio Piacentino on July 18, 2016 at 8:00am

Hi Ayk,

Yes, you can remove the start parameter and just raise 3 to the power of i.

Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com

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