Fixed a math bug, and some other minor additions

It’s been a little while, huh.

Fixed broken dot product function making a bunch of different operations kind of weird

This was a little embarassing.

The two most noticeable places where this was a problem involved normals sometimes being broken when doing operations like swapping axes/baking a transformation into the model.

Added a “reverse faces” button

Weirdly, the code for this was already in there, it was just never presented to the user (though the mirror functions called it implicitly).

Added a mesh overhead wireframe render tool

Added this for a very specific task in wizarducks. May or may not be useful to other people too.