Open the file below. You won’t see anything, so use Ctrl+A, which will select one surface. Zoom Selected will not zoom in close enough to be able to see anything no matter how hard you try, but if you run Check, it says “Valid”.
Rhino reports an area of 1.29097628e-40 (+/- 1e-49) square millimeters
The size of a hydrogen atom is around 0.5e-10 meters or 0.5 e-7 millimeters. This is like 37 orders of magnitude smaller than that. It’s somewhere down around the Plank Length…
Anyway, you can’t see it, you can’t get the edges - they are invalid - you can’t really do anything with it. So why is it considered valid?
(yes, it was created with a script, but I was surprised when it passed the check for validity - of course anything else I tried to do with it failed)
You can then get a dup border, but although it should be 4 lines ( it is a plane surface), the result is only a polyline with 3 points and explodes into two lines that are each 1.59404e-05 angstroms in length. So the ‘validity’ is still questionable in my mind. Of course one could define custom units even smaller than that, but in principle the validity is also in relation to the file units. For example certain curves with micro-segments in them that are below file tolerance but well above this level of tiny-ness are considered invalid.
I wouldn’t want that thing anywhere near any model I would make…
In fact, it’s just a dummy surface which was created via script to be used to split something else (which it wouldn’t). I just added it to the document to try and see what it looked like.
