Re: OpenGL states and performances

karim.atiki@[EMAIL PROTECTED]
 wrote:

> 
>> I wouldn't use alpha test. It cerates jaggy edges. In 2D tile
>> based application you can use blending w/o problems, as you're
>> going to use the painter's algorithm anyway and don't use the
>> depth test.
> 
> Ok, but basically how would you replace the alpha test with
> blending ?

glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

Alpha test and blending are completely different things, but in
your case the effects will be similair, however blending will
give you the better quality.

Wolfgang Draxinger
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