Curves on each surface

Hi.
I have a list containing the corners of different plane surfaces, now I wan't to use these corner points for a control point curve. But how do i get the the curve component to know only to make a curve for each surface. I have attached my list, it is split up into the corners of each surface.
Best regards Rasmus

Attachments:

list3x0.png, 96 KB

Replies to This Discussion

Permalink Reply by Rasmus Holst on November 11, 2009 at 10:07am

Offcourse. You guys have been great. I am sorry for all of the questions, but I do have one more, and you seem to be really good at using GH :).
What is the simplest way of getting the surface normalvector for the different surfaces/curves? So that I can extrude them or thicken them and subtract them from eachother. It's just like so many before me have made, but I am not sure what is the easiest way, cause I also have to extrude all the surfaces "out" of the volume.

Permalink Reply by Vicente Soler on November 11, 2009 at 10:13am

I think there's an implicit conversion for planar surfaces. Try connecting the surface to a vector parameter. It should output the normal vector of the surface's plane.

Permalink Reply by Rasmus Holst on November 11, 2009 at 10:26am

...i guess you are right, the problem I guess is that some of the surfaces/curves are not planar. I will try to figure out something....

Permalink Reply by Vicente Soler on November 11, 2009 at 10:32am

If they are not planar, you'll have use the evaluate surface component. You'll have to choose on what point of the surface you want to find the normal. If you want roughtly the center of the surface, input {0.5,0.5,0} on the uv input, right click on the surface parameter and enable "reparameterize".
(A bit of nitpicking: David says he uses proper British spelling in Grasshopper. In that case, it should be spelled reparameterise).

Permalink Reply by Rasmus Holst on November 11, 2009 at 10:41am

yeah this gives me the normals. But if i then it will only extrude the curve it self, can I somehow extrude the surface that the curve creates?

Permalink Reply by Vicente Soler on November 11, 2009 at 11:00am

Yes, you can also extrude surfaces, just input the surface instead of the curve into the extrude component.

Permalink Reply by Rasmus Holst on November 11, 2009 at 11:54am

I can not creat surfaces for all off the curves.... But thank you very much for you great guidance.
Best Regards. Rasmus