"Leroy" <whe### [at] gmailcom> wrote:
>
> The basic planes in are POV 3D world is x and y and z only.
> Strictly speaking the x-z plane is a set of points that x-z=0 make a funky
> plane.
>

Ha! I didn't initially grasp your main rant that 'x-z plane' could be read as
     'x minus z'

Yeah, that could be confusing, to say the least!

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