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SubjectRe: Tile Renderers Reply to this message
Posted byBart T.
Posted on07/29/04 01:10 AM

> Yes i think that was the main thing i was thinking as well, I just didn't
> realise it had a name "front-to-back" ;-)

Front-to-back rendering is _not_ an optimization. It's actually quite a bit slower because for each pixel, you need to check to make sure there's nothing in the frame buffer with a higher priority. It's almost like Z-buffering except that you don't necessarily need a separate occlusion buffer (though I think Stef mentioned Gens uses one.)

Genecyst encoded priority information into the upper 2 bits of each pixel and it used that to determine whether something was already there (because obviously the color data alone tells you nothing.)

Front-to-back rendering is required for complete accuracy, though. If you're comfortable with sacrificing that, I'd stick to a back-to-front method because even though there's going to be overdraw, you don't have to worry about reading the frame buffer contents at each pixel.


Entire Thread
Subject  Posted byPosted On
*Tile Renderers  finaldave07/26/04 02:21 PM
.*Re: Tile Renderers  erikduijs07/28/04 01:46 PM
..*Re: Tile Renderers  finaldave07/28/04 09:24 PM
....Re: Tile Renderers  Bart T.07/29/04 01:10 AM
....*Re: Tile Renderers  finaldave07/29/04 11:43 AM
.....*Re: Tile Renderers  Bart T.07/29/04 02:39 PM
......*Re: Tile Renderers  Jan_Klaassen07/29/04 03:32 PM
.......*Re: Tile Renderers  Bart T.07/29/04 06:54 PM
........*Re: Tile Renderers  finaldave07/29/04 10:46 PM
........*Re: Tile Renderers  Jan_Klaassen07/29/04 10:11 PM
.*Re: Tile Renderers  Hyde07/27/04 08:04 PM
..*Re: Tile Renderers  finaldave07/27/04 08:27 PM
.*Re: Tile Renderers  Jan_Klaassen07/27/04 01:58 PM
..*Re: Tile Renderers  finaldave07/27/04 08:22 PM
...*Re: Tile Renderers  Jan_Klaassen07/28/04 03:00 PM
.*Re: Tile Renderers  Bart T.07/27/04 04:38 AM
..*Re: Tile Renderers  Stainless01/12/06 04:58 PM