Re: Coordinates

On Aug 12, 2005, at 7:44 AM, Martyn Amos wrote:

> Hi,
>
> When dealing with coordinates, is the origin in the "bottom left", as
> expected?
> Some systems I've seen have it "top left".

The origin (0, 0, 0) corresponds to the center of the world, and  
simulations
may grow out in any direction you choose.  The perception of the  
origin may
change according to how you build your simulation and where you place  
the
camera.

In general, the coordinates X, Y and Z correspond to left/right, up/ 
down,
back/forth, respectively, although again, these interpretations  
depend on
the relative motion of agents and camera placement.  If you are using
physical simulation, however, the default gravity is on the Y-axis, so
there is a sort of built in meaning to the coordinate system in that  
case.

- jon klein
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