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Concept
Video game graphics
Summary
A variety of computer graphic techniques have been used to display video game content throughout the history of video games. The predominance of individual techniques have evolved over time, primarily due to hardware advances and restrictions such as the processing power of central or graphics processing units.
Text-based game
Some of the earliest video games were text games or text-based games that used text characters instead of bitmapped or vector graphics. Examples include MUDs (multi-user dungeons), where players could read or view depictions of rooms, objects, other players, and actions performed in the virtual world; and roguelikes, a subgenre of role-playing video games featuring many monsters, items, and environmental effects, as well as an emphasis on randomization, replayability and permanent death. Some of the earliest text games were developed for computer systems which had no video display at all.
Text games are typically easier to write and require less processing power than graphical games, and thus were more common from 1970 to 1990. However, terminal emulators are still in use today, and people continue to play MUDs and explore interactive fiction. Many beginning programmers still create these types of games to familiarize themselves with a programming language, and contests are still held even today on who can finish programming a roguelike within a short time period, such as seven days.
Vector graphics
Vector graphics refer to the use of geometrical primitives such as points, lines, and curves (i.e., shapes based on mathematical equations) instead of resolution-dependent bitmap graphics to represent s in computer graphics. In video games this type of projection is somewhat rare, but has become more common in recent years in browser-based gaming with the advent of Flash and HTML5 Canvas, as these support vector graphics natively. An earlier example for the personal computer is Starglider (1986).
Vector game can also refer to a video game that uses a vector graphics display capable of projecting images using an electron beam to draw images instead of with pixels, much like a laser show.
Official source
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