Fixing compile error. It seems like these should be fabs instead of abs anyway...
D3D_FEATURE_LEVEL_11_2 isn't actually a thing. The D3D11.2 features are checked explicitly instead of using a feature level.
Fixing warnings about locals shadowing others of the same name. At least one of these was an actual bug.
Merge pull request #190 from MikePopoloski/master

Fixing a few issues I ran into