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A world unit is the basic unit of measure when dealing with BZFlag. World units have no real-world counterpart, as they are a purely virtual concept, but they can be though of to be equivalent to about 1 meter in length if you assume a roughly real world sized [[tank]].
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A world unit is the basic unit of measure when dealing with BZFlag. World units have no real-world counterpart, as they are a purely virtual concept, they can be though of to be equivalent to about 1 meter in length if you assume a roughly real world sized [[tank]].
  
All coordinates in the map file are specified in World Units. Many [[Server Variables]] are specified in terms of world units or world units per second as well.
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[[Category:Map_making]]
 
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==Origin==
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The origin for the World coordinate system is the center of the map.
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==Orientation==
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World Units are oriented in a normal right hand rule coordinate system with positive Z being the "UP" direction.
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===North===
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"north" on the in game radar is the positive Y direction in map coordinates.
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===Figure 1===
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This image shows a typical map, with the origin and axis directions clearly marked out.
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[[Image:MapCoordinateSystem.png]]
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== Some useful measures at default settings ==
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<div align="center">
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{| cellpadding="0" cellspacing="0" border="1" width="60%"
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|-
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|width="60%"|Jump height limit (next to impossible)
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|width="20%"|See below
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|width="10%"|18.42
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|-
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|Common jump height
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|See below
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|17.0
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|-
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|Tank length
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|_tankLength
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|6.0
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|-
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|Tank width
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|_tankWidth
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|2.8
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|-
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|Tank height
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|_tankHeight
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|2.05
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|-
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|Barrel height
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|_muzzleHeight
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|1.57
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|-
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|Drivable bump height
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|_bumpHeight
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|0.33
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|-
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|}
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</div>
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== Calculating jump height ==
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Jump height is determined by the gravity and jump velocity settings on the server (see [[Server Variables]] for details).  Note that the jump velocity and gravity may be altered by flags like [http://bzflag.org/documentation/flags Wings].
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:Max jump height = -(_jumpVelocity)<sup>2</sup> / (2 * (_gravity))
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A typical BZFlag player can reliably jump a bit more than 90% of the maximum jump height.
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==See also==
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* [[Comparison of map objects]]
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* [[Map making]]
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* [[Map FAQ]]
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[[Category:Map Making]]
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[[Category:Concepts]]
 
[[Category:Concepts]]

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