Hello Colin,
> What I found works best for fullscreen apps over two monitors is NOT
> checking the Display "extend my desktop to this monitor" option, and
> then configuring a "horizontal span" in the NVidia settings dialog.
> Basically things work more reliably when Windows is not involved.
> In horizontal span Windows just sees things as one very wide display.
The problem with this is that due to the changes in the Windows Driver
Model in Vista, this option is no longer available in the nVidia drivers
on this OS. You only have the multiple independent monitors option.
For me, working with OSG from SVN on Vista for a long while, this has
worked great. osgViewer knows when you have multiple monitors (as
opposed to a single desktop of double the width, which is what you get
in horizontal span mode) and will set itself up correctly. If you have a
single view which you want to stretch over both monitors, it will create
a master camera which has no graphics context, and then two slave
cameras each with a graphics context on one of the two monitors. This
works really well. You can see how this is done by looking up
osgViewer::View::setUpViewAcrossAllScreens() and do it manually if you want.
> if you want dual-screen performance and correctness
> choose span, and if you can accept some dual-screen OpenGL glitches
> choose multi-monitor ;-)
To reiterate, multi-monitor works great. Have you tested it lately? In
any case, if it doesn't work right for some, we should fix it, since as
I said, horizontal span is not an option on Vista - and I know some
people want to play the ostrich game, but XP will not be supported
forever and we will have to accept Vista someday.
That said, if some are having problems, I'm all for fixing them. I just
don't want false information spread about the different display modes
for using multi-monitor (or OSG's support for them).
J-S
--
______________________________________________________
Jean-Sebastien Guay [EMAIL PROTECTED]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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