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OpenGL
Started by mike74 Sep 16, 2005 at 9:36 PM 3 replies 900+ views
Original Post
mike74
mike74
I was just wondering what the fastest way to draw a background image in OpenGL is. I thought drawing a texture-mapped quad would be best, but it seems quite slow. mike http://www.coolgroups.com/
Mike C.http://www.coolgroups.com/zoomer/http://www.coolgroups.com/ez/
anist
anist
it is the fastest, though i think p-buffers work well to. did you disable blending when you draw the background?
As your leader, I encourage you from time to time, and always in a respectful manner, to question my logic. If you're unconvinced that a particular plan of action I've decided is the wisest, tell me so, but allow me to convince you and I promise you right here and now, no subject will ever be taboo. Except, of course, the subject that was just under discussion. The price you pay for bringing up either my Chinese or American heritage as a negative is - I collect your f***ing head.
RAZORUNREAL
RAZORUNREAL
Also, you might want to draw it last so you benifit from the early depth test. Assuming you are using the depth buffer.
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mike74
mike74
Thanks, but I'm not using the depth buffer.

What did that other guy (anist) say, and what happened to his post?

mike
http://www.coolgroups.com/
Mike C.http://www.coolgroups.com/zoomer/http://www.coolgroups.com/ez/
anist
anist
Quote:
Original post by mike74
Thanks, but I'm not using the depth buffer.

What did that other guy (anist) say, and what happened to his post?

mike
http://www.coolgroups.com/


disable depth test (if you draw it first) and blending when drawing the quad. also: turn off lighting and anything else you aren't using. put it in a display list if you need to. i also said pixel buffers may be the way to go.

As your leader, I encourage you from time to time, and always in a respectful manner, to question my logic. If you're unconvinced that a particular plan of action I've decided is the wisest, tell me so, but allow me to convince you and I promise you right here and now, no subject will ever be taboo. Except, of course, the subject that was just under discussion. The price you pay for bringing up either my Chinese or American heritage as a negative is - I collect your f***ing head.

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