Wraparound (video games)
video game mechanic where opposite screen edges are connected
Wraparound, in video games, is when an object moves off of one side of the screen and reappears on the other side. In Asteroids, for example, the player's ship flies off of the right side of the screen, then continues on the left side with the same velocity. This is referred to as wraparound, since the top and bottom of the screen wrap around to meet, as do the left and right sides (topologically equivalent to a Euclidean 2-torus).
Some games wrap around in certain directions but not others, such as Joust (1982), which wraps left to right but not top to bottom (that is, the game world is topologically equivalent to a cylinder). Some games such as Asteroids have no boundary and objects can travel over any part of the screen edge and reappear on the other side. Others such as Pac-Man, Wizard of Wor, and some games in the Bomberman series, have a boundary surrounding most of the playing area, but have a few paths connecting the left side to the right, or the top to the bottom, that characters can travel on.
In contrast, some games such as Defender (1981) do not allow objects to leave one edge of the screen and reenter by the other, but do have a toroidal game world, in the sense that flying far enough in one direction will lead the player back where they started. Manifold Garden (2019) applies the same "world-wrapping" in three dimensions.
History
1962's Spacewar! has a wraparound playfield, as does the first commercial arcade video game, Computer Space (1971).
“Wraparound (video games)” enters the record as video game mechanic where opposite screen edges are connected. Crown Archives preserves that source wording while asking what Wraparound, video and games can confirm, complicate or overturn.
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This entry incorporates text from “Wraparound (video games)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.