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  [2d]fake antialiasing for free  (Read 1070 times)
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Offline oNyx

JGO Coder


Medals: 1


pixels! :x


« Posted 2004-06-03 06:41:29 »



It's a very cheap trick and most likely nothing new, but since I'd never seen that anywere mentioned before I just post it here.

Basically it's just abusing the texture filtering... just leave a small (*) transparent border et voila - the edges start to bleed around.

(* 1 pixel width shown on the screenshot - tryed also 2px but it didn't make a difference)

I would say the quality is about as good as 4x rotated grid antialiasing, wich is pretty good. It's isn't 100% free since you need a third more vram for the textures (if they were without alpha before) and you'll need a bit fiddling around, but there are some occasions were you can use this stuff.

弾幕 ☆ @mahonnaiseblog
Online princec

JGO Kernel


Medals: 284
Projects: 3
Exp: 16 years


Eh? Who? What? ... Me?


« Reply #1 - Posted 2004-06-03 09:19:00 »

Nice trick.

Cas Smiley

Offline oNyx

JGO Coder


Medals: 1


pixels! :x


« Reply #2 - Posted 2004-06-03 10:10:23 »

On a second thought... it's even better than 4x rotated grid FSAA, because it doesn't screw your pixel accurate stuff (hud/fonts and the like). So it's more like that fragmented AA stuff (wich only cares about the aliased parts stored in that fragmentation buffer). Neato Smiley

弾幕 ☆ @mahonnaiseblog
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