The Accumulation Buffer

Graphics and GPU Programming Programming

Started by mittens October 24, 2001 05:28 AM

6 comments, last by mittens 22 years, 5 months ago

1,323

Author

October 24, 2001 05:28 AM

Ok, I know a lot of you have been wondering about the Accumulation buffer, and if it''s really as slow as people say it is! And to answer that question: YES! The accumulation buffer is as slow as watching a slug compete in the Ironman Triathalon. I had a 100x100 window, and rendering a 100poly model 6 times, on my 1.2ghz AMD, and 32mb GF2, and got 6 frames per second. Soooo, all in all, NO ONE SHOULD USE THE ACCUMULATION BUFFER!

------------------------------ Trent (ShiningKnight) E-mail me ShiningKnight Games

Trent Polack
Game Designer, LightBox Interactive
Twitter :: Polycat

Terran Marine

122

October 24, 2001 05:47 AM

I know what you mean.

I noticed there''s a multisampling extension (GL_MULTISAMPLE_EXT or something like that) that was added in OpenGL 1.3. It can be used for lightning-fast FSAA.

I''m not too good with extensions, so why don''t you make a tutorial on how to use the multisampling extension? It''s a great alternative to accumulation buffer AA.

bondi

122

October 24, 2001 06:14 AM

Is there any downdloadable version of opengl1.3 specfication?

VolkerG

151

October 24, 2001 09:23 AM

To bondi: http://www.opengl.org/developers/documentation/specs.html.

Edited by - VolkerG on October 24, 2001 10:23:18 AM

Terran Marine

122

October 24, 2001 09:33 AM

nVidia released a .pdf document about using the extension.

Personnaly I don''t know how to go about using the extension, maybe someone can shed some light into it?

Anonymous

October 24, 2001 09:59 AM

The extension gives you new screenmodes, adds a new type of framebuffer (the multisample buffer) and switches on what they call multisample rasterizing. The extension mainly operates with new flags on existing functions, lots of wgl_* functions obviuously. I haven''t tried it out yet, but it doesn''t seem to complicated.