Grasshopper

algorithmic modeling for Rhino

"Curve Evaluate" And "Point On Curve" Diffrences

Hi

I have a "arc-like curve" and i want to find the "mid point" of this curve.

I thought that if i reparametrize it and evaluate it at "0.5" it would give me the "mid point". But when i baked my curve i realized that, the point is not exactly on the "mid of the curve".

After that i use "point on curve" component, this give me the True mid point of the curve.

I want to ask, why the "curve evaluate" component, doesn't work as i expected.

thanks.

Views: 532

Attachments:

Replies to This Discussion

Permalink Reply by David Rutten on August 4, 2015 at 5:48am
Curve parameter space is the mathematical space within which the curve is defined. Using this space results in the quickest evaluations and most methods require numbers in this space. The point on curve component uses lengths instead. If you want a point in the middle of the curve you need to use lengths rather than parameters.

RSS

About

Scott Davidson created this Ning Network.

Translate

Search

Photos

  • Add Photos
  • View All

Videos

  • Add Videos
  • View All

© 2024   Created by Scott Davidson.   Powered by

Badges  |  Report an Issue  |  Terms of Service