topic Re: Sketch polygon cannot to constrain... bug in Fusion Support Forum

Sketch polygon cannot to constrain... bug

teknoel — Tue, 30 Mar 2021 15:40:01 GMT

A fully constrained sketch with a polygon will never get the fully constrained "lock" icon nor show the poly has black. See enclosed simple demo file... very simple sketch to show the bug

Re: Sketch polygon cannot to constrain... bug

dsouzasujay — Tue, 30 Mar 2021 16:06:08 GMT

Hi @teknoel

Thanks for reporting this issue! I agree with you that this is a bug , reported as FUS-80605 in internal issue tracking system. Hope we get it resolve sooner.

Re: Sketch polygon cannot to constrain... bug

brink.gregory — Tue, 30 Mar 2021 16:30:01 GMT

Hi, I opened the example you attached and deleted two dimensions and then added two new ones and the sketch is now fully constrained. I suspect that the two horizontal dimensions didn't satisfy the polygon definition even though it seems like it would. That's why I went for a direct approach of tying the polygon center to the origin and then defining the length of the sides. You had already nailed the angle with the parallel constraint so that was all it took.

I did a new sketch similar to your example (but with the default hexagon) just to prove to myself that I could constrain a polygon and it worked fine by constraining the center, the angle and the length of the side.

Good luck!

Re: Sketch polygon cannot to constrain... bug

teknoel — Tue, 30 Mar 2021 16:50:09 GMT

I think you misunderstood my sketch setup... The idea was not to use the center point of the polygon....

Re: Sketch polygon cannot to constrain... bug

brink.gregory — Tue, 30 Mar 2021 17:02:21 GMT

OK, I was just responding to the first line of your post stating that a
sketch with a polygon can never be fully constrained. I don't use polygons
very often so I first did a sketch just to convince myself that I could
create a sketch with a polygon and get it fully constrained. Once I did
that I opened yours to see if I could get it fully constrained (because
I've had problems with sketches containing splines that can be fully
constrained and then become unconstrained when a non-required feature is
deleted). I changed the way it was dimensioned and it worked.

I suspect the problem with the original has to do with
concatenated constraints not getting interpreted enough to satisfy the lock.