SOS getting normal of a point

I have a set of points on a surface. how do it get the normal vector of this points from the surface as i want to extrude them along their normal.

thank you

guan

Replies to This Discussion

Permalink Reply by David Rutten on April 24, 2010 at 6:46pm

Hi Guan,

use the Surface CP component to find the UV coordinates on the surface that are closest to the point, then evaluate the surface at those UV coordinates to get the normal.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Guan Xiong on April 24, 2010 at 7:23pm

Hi David,

Thank you so much for the tip! You're a life saver! I have a few question I hope you can guide me as you are so much more experienced in this field.

I have a set of lines that are made in grasshopper through 2 set of points, but loft dont seem to work, the output of the loft are nulls, is there a pre-requisite setting of curves for the loft command to work, or is it that the loft command works on curves not lines?

This is a little out of topic, I have a complex model and making 2d is taking quite some time and too the output of the 2d is not that nice , in terms that traces of 2d lines were made by intersecting solids which are not supposed to be made. is there any tip to get a faster and cleaner way to make 2d? are there any tricks? is there a way for me to make a render of a 'make 2d' like rendering in programs such as vray? are there other programs that does vector rendering? i have checked online, theres this maya vector rendering, but they are rendering the vectors of the wireframe, can you do it without the wireframe? is there a way to do this in rhino?

So sorry for the long post.

Thank you so much, your guidance is much appreciated.

Guan

Permalink Reply by David Rutten on April 25, 2010 at 3:08am

Lofting operates on lists of curves. You need to supply your curves in lists of at least 2 long. If all your curves are in their own little list, you'll end up with a bunch of null lofts.

Make2D in Rhino5 should be better and faster than Rhino4. You could try that.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Guan Xiong on April 25, 2010 at 7:03am

Thank you so much david!

guan

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