https://all3dp.com/g-code-tutorial-3d-printer-gcode-commands/

http://marlinfw.org/meta/gcode/

https://www.nist.gov/publications/nist-rs274ngc-interpreter-version-3?pub_id=823374

https://reprap.org/wiki/G-code#G2_.26_G3:_Controlled_Arc_Move