[SDL] Performance with 2D graphics and no OpenGL

[Tom Davies]

Okay, that makes sense. This will also make it a lot easier to handle
scrolling and zooming I assume :)

On 5/23/07, Alberto Luaces <aluaces at udc.es> wrote:
>
> El Miércoles 23 Mayo 2007, Tom Davies escribió:
> > Perhaps this will be my best option then. I am reading up on tutorials
> for
> > OpenGL and SDL, but most seem geared towards 3D applications. If anyone
> can
> > point me towards some good resources I would really appreciate it.
> Thanks!
>
> Basically doing 2D with OpenGL is to pass all the coordinates with the
> third
> value set to zero (z=0) and do the most rotations about the Z axis
> (however
> you can get some nice effects rotating about the X and Y, too). To get rid
> of
> perspective issues, you can set an orthogonal perspective the one you
> expect
> to work with using gluOrtho2D:
>
> http://www.opengl.org/sdk/docs/man/xhtml/gluOrtho2D.xml
>
> So the coordinates you pass match exactly the window coordinates.
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