infinite loops in `clean`

[krober10nd]

• If inverted elements appear (negative qualities), then msh.clean will not be able to exit and repeat the connectivity improvement code infinitely.

[WPringle]

does this still happen? the idea was that it would do additional cleaning that would correct the inverted elements and eventually become positive.

[krober10nd]

rarely but yes, it can still happen. I haven't done much meshing in recent months using OM. But sometimes you have to tinker with the cleaning operations to avoid this to happen.

Almost always I turn the implicit smoother off. Lately, I just use the patch smoother in areas that I want better qualities.

[WPringle]

Yeah maybe the implicit smoother should be discouraged