A very simple question (I assume) on direction vector of curve

Hello all,

I am trying to extrude a curve using the 'extrude' module in Grasshopper. For the module, I need:

a. curve itself

b. direction of extrusion (in form of vector)

How do I extract a (direction) vector of a curve? What module should I use? I went through all the Grasshopper icons, but I couldn't find anything.

Can anyone put me in the right direction? Thanks in advance.

Hyo

Attachments:

vector direction.jpg, 406 KB

Replies to This Discussion

Permalink Reply by Michael Pryor on December 17, 2011 at 12:15am

for starters you can,

1.Right click vector input, select set vector, and set a vector in rhino

2.use the x, y, or z component and plug it into vector input and plug a slider or number into the x, y, or z component.

3.Do step 2 but with a vector xyz component and then use the amplitude component.

4.Use the vector2point component and set a vector between 2 points and use amplitude component.

In the specific case you show, set the line into grasshopper with a curve component, plug that into a endpoints component, plug the sart point and end point into vector2point, plug that vector into amplitude with a length and plug that into the extrude vector.

Permalink Reply by Pieter Segeren on December 17, 2011 at 3:11am

Hi Hyoseok, looking at the picture you added, I'd say you want the normal of the plane that the polygon is on. (It is a planar polygon, right?)
(you can use a line instead of a vector too)

Permalink Reply by Hyo Hwang on December 17, 2011 at 7:17am

Thanks guys. I figured it out finally. It was hard for me to find the right modules, looking at pics you gues posted. My modules have letters, not pictograms. X( (Yes, I am a real newbie in the area)

So i got this. Thanks again!