In Five Nights at Freddy’s the game has some sort of “3D camera vision” like so:
http://webmup.com/riR0o/vid.webm
I think it’s called the fish eye lens effect? It’s basically just a long flat image stretched/curved(?) to look like the player was looking around I guess. The game has surveillance cameras too, and they have the same effect when moving left and right.
I was wondering how I could achieve the same effect? Preferably with Libgdx or using GL functions 