Parallel Universe: Difference between revisions

[[File:ParallelUniverseViews.jpg|thumb|A diagram of Parallel Universe movement in [[Hazy Maze Cave]], after [[Mario]] has returned to the main map.]]A '''Parallel Universe''', or '''PU''', is an area in a ''[[Super Mario 64]]'' map at which the game creates phantom floors despite [[Mario]] being "outside" of the level. This is because the casted position value used to check for ground below Mario doesn't have enough bits to go above 7FFF_h or below -8000_h, unlike Mario's actual position, which is a [[float]]. [[File:Visible PU.png|thumb|184x184px|Frame of [[Peter Fedak|Peter Fedak's]] video where he turn Parallel Universes visible using Hacks, notice the lack of [[Objects]]|left]][[pannenkeok2012]]'s video "[[Fly Guy Size Manipulation]]" confirms that vertical PUs do exist as well. However, since Mario's Y position cannot exceed 20000 in most circumstances, there are only two ways to reach a positive vertical PU: Hyper Speed Flying, and Platform Release Displacement. Negative vertical PUs can be reached with those methods or the Overflow Jump. "[[Spawning a 100 Coin Star in a PU]]" shows that spawning a [[100 Coin Star]] in a PU will softlock the game. Note that PUs do not have anything except floors, so there are no walls, ceilings, or [[objects]].

Most emulators (including the official [[Virtual Console]] version) do not correctly emulate crashing due to floating point exceptions. A specialized version of Mupen64 was created that crashed when encountering floating point exceptions in order to better test PU routes.