offset a list of surfaces but in opposite directions, why?

i tried to offset a group of surfaces but the 2/3 of them are offsetting to one direction and the 1/3 of them to the opposite. why?

Replies to This Discussion

Permalink Reply by Danny Boyes on October 11, 2010 at 4:00am

Normally, how you create these surfaces will be the key to the answer. The U and V directions are subject to the order in which you select curves when creating edge srfs.

So if I had to guess the surfaces in the top left of the image were created with the right hand edge first where as the others were created with the left hand side selected first

Permalink Reply by idtasos on October 11, 2010 at 6:48am

Actually all the faces were created using the lower edges (connected to B) and the upper edges (connected to C) together. And the lower edges are the intersections between multiple YZ planes and the XY plane. So i still cant figure why this is happening. Maybe some of the upper edges are inverted somehow?

Permalink Reply by Danny Boyes on October 11, 2010 at 6:57am

You could try using the Flip (curve Direction) component and make use of the Guide Curve input and see if that makes a difference.

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