Hi,
thank you so much. I have just found the pdf by NVidia talking about depth
peeling. I think that's just what I was looking for. I cannot find yet the
tutorial, but I think I have to search better. Thanks a lot for the
suggestion.
Best Regards
--
Lorenzo
email: email@hidden
> From: Keith Bauer <email@hidden>
> Date: Sun, 26 Dec 2004 00:51:59 +1300
> To: Lorenzo <email@hidden>
> Cc: Mac List <email@hidden>, Chaz McGarvey
> <email@hidden>
> Subject: Re: Transparent objects
>
> there is no really good solution to this.
>
> to be absolutely perfect, you must draw each transparent pixel
> individually, applying the layers in furthest to nearest order.
> Clearly, this isn't practical.
>
> as a "next best" approximation, you draw each triangle in back to front
> order, splitting triangles that have ambiguous orderings relative to
> each other into three smaller triangles, BSP-style. This is probably
> still too complex.
>
> in the "probably OK" basket is sorting all the triangles back-to-front,
> then drawing them in order. There are still cases that can cause
> problems here, and the particular way you sort may or may not cause
> additional problems, but it should generally work pretty well.
>
> in the "really weird" basket is a technique called "depth peeling",
> which is an ugly hack to get order-independent transparency. Googling
> should turn up the paper. This probably isn't practical.
>
> -Keith
>
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