null perp frame on circle for no reason

Hi! Has anyone encountered this problem so far?

Same component, same list everything the same. You input one circle, everything is fine. You input another one, it throws a null, for no apparent reason. Both circles are directly created, at random. I have no explanation for this. Hope someone else will.

Thanks!

Attachments:

error.gh, 15 KB

Replies to This Discussion

Permalink Reply by Andrei Ivanescu on August 14, 2013 at 2:50pm

sorry, forgot to mention - the numbers in the t are 0.25, 0.5, 0.75 and 1.

Permalink Reply by David Rutten on August 14, 2013 at 4:22pm

It definitely sounds like a bug. I'll see if I can trace the problem to the relevant SDK method.

David Rutten

david@mcneel.com

Tirol, Austria

Permalink Reply by Andrei Ivanescu on August 14, 2013 at 4:52pm

thank you very much! eventually i got around it, by rebuilding the circle before the evaluation, but the whole thing looked fishy, so i decided to post it.

maybe it's got something to do with how a circle is defined? seeing as how in rhino there are 4 arcs with kinks in between- and the problem happens either at 1/4 or 3/4

Permalink Reply by David Rutten on August 15, 2013 at 2:13am

A circle in Rhino is a perfect circle. Only when you enable control-points do you get a nurbs-approximation of this shape which is when you see the apparent 4-arcs. There must be some other small bug that causes some vector go become zero-length or something.

David Rutten

david@mcneel.com

Tirol, Austria

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