Re: [Mesa3d-dev] Bug in z-depth

[Stephen J B. <sj...@li...>]

On Wed, 4 Oct 2000, Klaus Niederkrueger wrote:

> Hi,
> 
> There seems to be a bug in the depth-buffer code. That looks very strong like an rounding-error or something. On
> http://www.math.leidenuniv.nl/~klaus/bug.jpg
> you can see a screenshot I made. With Mesa-3.2 it looks o.k.
> 
> The error was produced by using Crystal-space. I believe it works like this (but I'm not sure): The walls are drawn with activated z-Buffer (but without z-Buffer testing) and afterwards objects are drawn with z-Buffer-test activated.
 
This looks like pretty typical Z buffer precision
issues.

Read this:

  http://web2.airmail.net/sjbaker1/love_your_z_buffer.html

...then tell us if you still think it's a Mesa bug.

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