[sldev] University of Michigan Stereoscopic Viewer patch

[Rob Lanphier]

Hi all,

For alert JIRA watchers, this is old news, but many of you might have
missed this:
http://jira.secondlife.com/browse/VWR-2972

From the report:
> Attached is a patch from the 3D Lab at University of Michigan to allow
> for stereoscopic viewing in Second Life and submitted to Linden Lab by
> special arrangement. Like all submissions, it's jointly owned by
> Linden Lab and the original contributor, and is made available under
> the standard Second Life viewer licensing (see
> http://secondlifegrid.net/programs/open_source/licensing/)
> <http://secondlifegrid.net/programs/open_source/licensing/%29>.
>
> More information about University of Michigan's 3D Lab is available here:
> http://um3d.dc.umich.edu/
>
> The attatched patch is against 1.18.2.1
>
> More information from Eric Maslowski at University of Michigan:
> ------
> There are currently 3 variables that are needed for the system and are
> located in "llwindowwin32" along with several get/set routines for
> accessing
> these variables. Ideally, these variables could be altered through the
> "advanced graphics" UI panel, but a simple config file or other element
> would work as well. Currently, they are hardcoded to ideal values for the
> eye separation and focal distance. The stereo mode will need some form of
> configuration though.
>
> Most changes occur in rendering the scene but shouldn't interfere with
> anything Linden Lab is already doing. Basically, we just alter the camera
> frustum slightly for the left/right eyes re-rendering as needed. For
> Anaglyph mode (red/cyan) we needed to wrap all existing "glColorMask"
> routines since we use this to draw the red/cyan channels/eyes. Outside of
> this, no other portions of code have been altered.
>
> Valid stereo modes for "mStereoMode":
>   STEREO_MODE_NONE,
>   STEREO_MODE_ANAGLYPH,
>   STEREO_MODE_ACTIVES 


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