Build units
The Build engine has its own set of units termed, "Build Units."
For orientation in the rotational direction, the Build engine uses a 2048-degree scale (as opposed to 360 degrees.)
This means that a 90 degree angle is equal to 512 build units. In relation to the direction a sprite/actor is facing, a value of 0 means the actor/sprite is facing due East. The numbering goes up clockwise until 2047 (just counterclockwise from facing due East.)
Build units are also expressed in terms of length, width, and height. One build unit is said equal to about 0.83 inches, or about 2.1 cm. The validity of this claim is, as of yet, unknown.
Another way that Build units can be expressed is with time. One second is equal to 26 Build engine time units.