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<p><b>New page</b></p><div>=Units of Measurement=<br />
==Overview==<br />
This page is copied from the [http://trac.caspring.org/wiki/UnitsOfMeasurement CA wiki]. It is a list of the many and varied units of measurement Spring Game developers have to deal with. Fortunately, all of the [[Animation-CobOverview | COB]] based units can be ignored if you are using [[Animation-LuaScripting | LUS]].<br />
==Base Units==<br />
===Time===<br />
* '''Seconds (s)'''<br />
* '''Frames (f)''' - There are 30 frames in a second. <br />
* '''Resource Frames''' - These occur every 32 frames. <br />
* '''SlowUpdate''' - These occur every 16 frames.<br />
<br />
===Linear===<br />
* '''Elmo''' - Fundamental linear unit of Spring.<br />
* '''Footprint Unit''' - This is equal to 16 elmos. Note that in Upspring or when building a unit in game you actually see two squares per side on a footprint square. Used in UnitDef and FeatureDef <code>footPrint{X,Z}</code> tags. (See [[Gamedev:UnitDefs#Movement_.26_Placement | Gamedev:UnitDefs]] and [[Gamedev:FeatureDefs]])<br />
* '''COB linear unit (clu)''' - 1 clu is 1/216 elmo. Scriptor can automatically converts to COB units based on a constant that you set (default: 2.5 elmos). <br />
* '''Map Size''' - This appears to be 512 elmos; thus a 16x16 map is about 8192 elmos on a side. <br />
<br />
===Angular===<br />
* '''Degrees'''<br />
* '''COB angular unit (cau)''' - There are 65536 cau in a circle, which means there are 182.044... cau per degree. Scriptor automatically converts to cau based on a constant that you set (default converts from degrees). <br />
* '''1/45055 circle''' - Used for <code>accuracy</code> and <code>sprayAngle</code> (see [[Gamedev:WeaponDefs]]). <br />
* '''Radians (rad)''' - There are 2 * pi radians in a circle. Used in lua.<br />
<br />
==Derived Units==<br />
===Velocity, Acceleration===<br />
* '''Elmo / Second (elmo/s)''' - Used for weapon velocity. <br />
* '''Elmo / Second<sup>2</sup> (elmo/s<sup>2</sup>)''' - Used for weapon acceleration, map gravity. "Default" gravity is 130. <br />
* '''Elmo / Frame (elmo/f)''' - Used for unit velocity. <br />
* '''Elmo / Frame<sup>2</sup> (elmo/f<sup>2</sup>)''' - Used for unit acceleration. <br />
* '''COB linear units / Second (clu/s)''' - Used for COB move statement speed. Always positive even if the movement is in a negative direction. <br />
<br />
===Angular Velocity, Angular Acceleration===<br />
* '''COB angular units/Second (cau/s)''' - Used for weapon turn rate; COB turn and spin speed. Always positive even if the movement is in a negative direction. <br />
* '''COB angular units/ Frame (cau/f)''' - Used for unit turn rate. (Actually uses 65535 in a circle instead of 65536, but that's not enough to matter in most cases.) <br />
* '''COB angular units/ Frame-Second (cau/(f*s))''' - Used for COB spin acceleration. Note that COB acceleration is signed, unlike COB speed; if you want a negative spin, you need negative acceleration.<br />
<br />
==Coordinates System==<br />
<br />
http://springrts.com/mediawiki/images/1/19/Untitled-1.png<br />
<br />
[[Category:Game Dev]]</div>intermisc/gamedev>Hokomoko