> Date: Fri, 19 May 2000 16:14:34 -0400
> From: Shawn Kendall <[EMAIL PROTECTED]>
> X-Accept-Language: en
> MIME-Version: 1.0
> To: Dan Petersen <[EMAIL PROTECTED]>, "[EMAIL PROTECTED]"
<[EMAIL PROTECTED]>, Java 3D Beta Program <[EMAIL PROTECTED]>
> Subject: Re: SIGGRAPH and Stereo fix for Win32
> Content-Transfer-Encoding: 7bit
>
> Dan Petersen wrote:
>
> > We tested stereo support using an AccelGalaxy card. Java 3D supports stereo
> > by using the stereo API in OpenGL. We found that some cards required
> > a separate extension to be called to enable stereo and so these cards
> > are not working. Once the manufacturers update their drivers to support
> > stereo as described in the OpenGL specification then stereo should work
> > in Java 3D.
> >
> > We have also determined that some cards do not keep a separate Z-buffer
> > per eye. This leads to an incorrect image for one eye. This problem came
as
> > a surprise to us but we plan on coming up with a "fix" for this in an
> > upcoming release.
>
> We can enable stereo just fine. You can see both stereo images rendering, and
it
> synchs correctly with the glasses.
> The separate Z-buffer problem is exactly what we are experiencing on two
different
> manufactures cards which makes it unusable, and definitely unpresentable.
>
> Will that fix be available in time for SIGGRAPH? In time, being well before
> SIGGRAPH so as to be able to test?
> Specifically, when is the next release expected?
>
Unfortunately we will not have a release out before Siggraph.
While there is nothing in the OpenGL spec saying what to do for stereo,
for performance reasons sharing the Z-buffer for both eyes is not a
good idea. All Sun graphics cards and our PC test cards have a Z-buffer
per eye so this problem caught us by surprise.
Dan Petersen
Java 3D Team
Sun Microsystems
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