Orientation problem on surface

Hi folks!

I have a simple (I guess) problem with the orientation of this extrusions.

I made the control curves using the 4 vertices of each subsurface, afterwards I used the normal plane of the "planarity test" plane for each curve, as i want the extrusion to be related to the curve orientation.

Anyone knows how can I make all the planar vectors point in the same direction and chosing wich one shoud it be?

I guess it could be a conditional statement, but can't guess wich one.

Leaving you also the .GHX

Attachments:

OCULOS EN SUPERFICIE.ghx, 80 KB

Replies to This Discussion

Permalink Reply by Lars Renklint on July 23, 2009 at 4:37pm

This is really over my head, but I still made an attempt to solve it. And replacing the Planar component with the Curvature component and using "Curvature circle at t" as extrusion direction gives you extrusions in the same direction. Don't know if it's what you're after though..

Permalink Reply by Miguel Villegas on July 24, 2009 at 12:54am

Hi Lars! Tahnks for your interest.
I repeated the whole process yesterday, explaining it to my wife, and we managed to solve it together.

We subdivided each subsurf in 2 parts and listed the 4th element (that would be "kind of" the center point with its own normal plane) and used it as an extrusion vector.

To cap the extrusions we had to build a Plane Surf using the Planarity Plane of each curve and project the curves on to them. The resulting curves were then extruded and capped. Those are the ones you see in yellowish-green.