How to make the player use elytra flight(Tutorial)

Pretty much just use the code inside the snippets to turn on or off elytra flight. U can use this code even without any armor. I found it useful for cool custom flight as it handles flying rotations. Everything outside of it is mostly for checking conditions inside my mod so don't worry about those. The elytra flight check may be from a plugin, but I forget.

With this u can achieve something similar too this. 

https://i.imgur.com/XhIHY9X.mp4

This is very early build of my mod and only adds superman. The picture simply turns on elytra flight so u will need to do more to achieve something similar. But this is mainly what is used for the rotations.