Re: OpenGL states and performances

Hi Wolfgang,

> Both are excellent ideas, and it's the way how it should be done.
> Now a suggestion: Before doing the actual rendering to a
> pre-pass to determine all the textures you actually need. Then
> group them by layer, and within each layer group the rendering
> order by texture, so that you get the least amount of texture
> switching.
Ok.
Currently it is almost processed like that.


> You can't "active" the alpha channel. If you've got a RGBA
> texture, it's always there. What you can enable/disable is the
> blending between new fragments and the old content of the
> framebuffer.
> glEnable/glDiable(GL_BLEND);

Sorry, I made a stupid mistake... :o))
I meant: glEnable(GL_ALPHA_TEST) and not glEnable(GL_ALPHA_CHANNEL).

;o)

Zyend