Difference between revisions of "Map unit"

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Revision as of 20:27, 13 March 2007

The positions and sizes of objects in Doom levels are generally described by integer values between -32768 and +32767. The unit length is often called a map unit (or simply, unit). Some example dimensions in terms of Doom's map units are:

It is difficult to translate the size of a Doom map unit into a real-world unit, since the dimensions of various objects in the game are inconsistent. Very roughly, one could attempt to translate 32 map units as 1 meter based on the height of the Doom guy (56 units). With this interpretation, a Cyberdemon would be 3.5 meters tall and a typical Doom level would have a size of approximately 120 m × 120 m.

However, height and width units don't quite agree. The 1-meter interpretation would imply that the Doom guy is one meter wide, or at least cannot pass through an opening narrower than one meter, which would be to exaggerate his muscularity. A more realistic interpretation (if there is any such thing) is perhaps that one "width unit" (w) corresponds to 3/4 of a "height unit" (h).

See also