* Bring code over
* Rename
* clean up variables.h
* Bring over some more code as well as cleanup
* remove newline in functions.h
* format
* Add plane functions
* Remove from actorfixer
* Add some more docs to plane functions
* Use temp for better format
* change func_8013E8F8 to return an s32
* rename origin back to pos
* format
* Add docs to SubS_ComputePlane
* format
* gfxContextPtr -> globalCtx
* bss
* Better docs of SubS_ComputePlane
* Normal -> unitVec
* Review pt. 1
* Update plane comment
* SubS_ActorAndPlayerAreFacing -> SubS_ActorAndPlayerFaceEachOther
* Add subs texture defines
* Update include/z64math.h
Co-authored-by: EllipticEllipsis <elliptic.ellipsis@gmail.com>
Co-authored-by: EllipticEllipsis <elliptic.ellipsis@gmail.com>