[PD] GEM mapping units to pixels

[chris clepper]

Setting a 1:1 perspective tells GL to make x=y in units even though the
ratio is 1.33:1 in the display.  By not doing this rectangle 1 1 would be
drawn to match the 4:3 ratio of the window (although the default in GEM is
x=y so you have to change it to something other than 1:1 to have this
happen).

The test2 patch resets some of the ratios to 1:1 so the perspective corrects
that back to fit the window, otherwise the square is taller than it is wide.

Hopefully I didn't make this more confusing.

On 5/13/07, cyrille henry <cyrille.henry at la-kitchen.fr> wrote:
>
>
>
> chris clepper a écrit :
> > You are wondering why a 1:1 perspective works for a 4:3 window?
> >
> yes.
>
> cyrille
>
>
>
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