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| + | #REDIRECT [[Glossary#Azimuth]] |
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| − | = Azimuth =
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| − | One of the two rotational axes used by the astronomers, and also by [[RT3D]] programmers. Azimuth is similar to [[Yaw|yaw]]-- if you shake your head "no," you are rotating in azimuth. Most [[Engines|engines]] count from 0 to 360 degrees, starting out pointed straight forward, turning clockwise all the way around, and ending pointed straight forward again. Straight forward is both 0 and 360 degrees, and straight backwards is 180 degrees. Sometimes mathematicians measure it in radians, a unit of measure that comes from the magical number Pi. A radian equals Pi/180, but most people use degrees instead of radians.
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| − | Astronomers use only two axes (the other axis is [[Declination|declination]]), because they do not use [[Roll|roll]]. This is similar to the way most [[FPS<sup>2</sup>|FPS]] games work. It is preferred in some RT3D engines because it keeps the viewer level no matter where he points. But this system has a drawback because it suffers from gimbal lock whenever the [[Viewer<sup>1</sup>|viewer]] points either straight up or straight down. The Quake games, for instance, avoid [[GimbalLock|gimble lock]] by not allowing the viewer to point all the way up or down.
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| − | [[Category:Glossary]]
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