Swapping axis labels between 2D and 3D coordinates

Posted by Will on Game Development See other posts from Game Development or by Will
Published on 2011-04-12T11:48:06Z Indexed on 2011/11/17 2:05 UTC
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vector

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coordinates

My game world is 3D.

The map is only 2D, however.

It is natural to think of the map as having an X and Y axis.

And it is natural to think of the world has having an X, Y and Z axis, where Y is upwards.

That is to say, X Y in 2D map coordinates is X Z in 3D coordinates.

What conventions and approaches do you have to keeping things straight at a code level to make mapping between them natural?

(Is Y usually upwards in 3D? Or do you have X and Z in map coordinates, or?)

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