Grasshopper

algorithmic modeling for Rhino

Smooth surface

Hi,

I have just started using RhinoCommon to manipulate NURBS surfaces. My goal is to change location of control points but keep the continuity of the second derivative of the surface.

I tried that code: http://pastebin.com/ZZccuvnc

But the result is not satisfactory.

http://i.imgur.com/DeKRB.jpg

Is it possible to get smooth surface without kink ?

Views: 2308

Replies to This Discussion

Permalink Reply by Fred Becquelin on October 30, 2012 at 9:29am

The problem is your base surface.

Spheres and circles are a special case of nurbs. They have different weights on control points. That's why there is a "deformable" option when you create a circle in rhino. It rebuilds the circle to an approximation of a circle, but then you can deform it without kinks. You just have to do the same with your sphere.

Hope it helps,

F.

Permalink Reply by Krzysztof Bzowski on October 30, 2012 at 9:52am

Thank you for your quick reply. I am new in RhinoCommon. Can you explain what is the correct way to do it using SDK code?

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