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Quad-buffered Stereo
Quad-buffered (aka CrystalEyes) stereo is the name used within VMD for the
quad-buffered frame-sequential stereo display mode found on
professional graphics workstations. Quad-buffered stereo generally yields
the highest quality output, and is therefore the most desirable stereo
mode to use when available. Since quad-buffered stereo requires more
video memory, and special display synchronization circuitry, this mode
is usually only available on professional-grade GPUs such as
AMD FireGL, NVidia Quadro FX, and similar products.
Typically this
mode is used to drive LCD shutter glasses with a CRT display,
120Hz LCD panels, or various high-end stereo-capable projection systems.
Quad-buffered stereo mode provides separate left and right eye frame buffers.
It allows the a window display in stereo, while all
other windows appear as normal.
The display must be set in a stereo-capable mode before starting
VMD. On SGI workstations, one must use either the setmon or
xscreen utilities to configure the display mode. On Sun workstations
this is done using the fbconfig utility. HP systems use the
sam utility for display configuration. Microsoft Windows uses
the Display Properties tab to control video board display mode
settings.
Once set in the proper display mode, start VMD as normal, and select
`QuadBuffered stereo' from the Display menu. The image
should switch to two images nearly superimposed, but slightly offset.
Next: Side-By-Side and Cross-Eyed Stereo
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