I have been having problems using swap groups. I am running on a windows 7
machine, and have 2 Quadro K5000 cards with sync card, set to use an house sync
@ 60 Hz. The sample code I have from NVidia does seem to work fine.
The problem I am having is I get a hang on the windows swap buffer call. I am
using OSG 3.2. I have modified the composite viewer example to add the
following code:
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
traits->x = 100;
traits->y = 100;
traits->width = 1000;
traits->height = 800;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->swapGroup = 1;
traits->swapGroupEnabled = 1;
osg::ref_ptr<osg::GraphicsContext> gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
@ around line 220.
Any advice on this matter would be greatly appreciated, even vague guesses as
to the cause.
Also with tracing through the code I did notice the NVidia example does use
wglQueryFrameCountNV, and wglResetFrameCountNV, and OSG does not. I also
noticed that if setup their sample program to use wglResetFrameCountNV, but
never call wglQueryFrameCountNV, I get a hang similar to what I see with using
OSG. I have modified OSG to use wglResetFrameCountNV and wglQueryFrameCountNV
and still get the problem.
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