problem offsetting closed polylines

Replies to This Discussion

Permalink Reply by Chris Tietjen on April 6, 2011 at 9:19am

It looks like some of the curves need to be flipped.  I don't know if there's a way to control this from the surface split level.

 

Chris

Attachments:

• OffsetCurvesFlipSome.ghx, 124 KB

Permalink Reply by stefano suarez on April 7, 2011 at 2:54am

thanks for replying, Chris.

I think there's more than just the flipping of the curves, even rotating curves that already have the same direction some offest diappear. I gues it has to do with coordinates? or picking order?

Permalink Reply by kleerkoat on April 7, 2011 at 10:06am

i find a lot of the time it has to do with the placement of the curve seam.

Permalink Reply by stefano suarez on April 7, 2011 at 10:15am

whatever it depends on, I can't manage to control it. :(

Permalink Reply by madmax on April 7, 2011 at 10:47am

i had the same problem! i think its a bug because its worked great in older versions.

i did it like this:

1.offset positive and negative

2.check if the offseted lines in the area of the area

3.cull the offseted lines which arent in this area

Permalink Reply by stefano suarez on April 7, 2011 at 11:33am

i don't really understand point 2.  "in the area of the area"?

Permalink Reply by madmax on April 7, 2011 at 11:47am

sorry!

just check if the offseted line is in the original rectangle or not, cull the excluded one

Permalink Reply by stefano suarez on April 7, 2011 at 12:00pm

My problem is that sometimes no offset appears at all, so there's no either positive or negative to cull. And by some quick experiment, the same couple face-lines produce different result in offseting by changin its position in the costrunction plane. It seems to be a coordinate issue?

Permalink Reply by stefano suarez on April 15, 2011 at 5:09am

sorry again! how would you cull the right line? cull pattern with a function?