Re: OpenGL orthographic projection

[Steve Baker <sjbaker1@airmail.net>]

Gregor Mückl wrote:

>     glMatrixMode(GL_MODELVIEW);
>     glLoadIdentity();
>     glPushMatrix();
>     glOrtho(-3,3,3,-3,-20,20);

You havn't set the projection matrix - so probably there is still a perspective
matrix there.

I would do this:

     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     glOrtho(-3,3,3,-3,-20,20);
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();

Also, you'll probably want to do a glDisable(GL_DEPTH_TEST) because
you probably still have it turned on from the 3D rendering part of your
code.

---------------------------- Steve Baker -------------------------
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