[visionegg] Re: visionegg Digest V3 #50
- From: Jon Peirce <Jonathan.Peirce@xxxxxxxxxxxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: Thu, 19 Aug 2004 09:53:03 +0100
Andrew,
a handy way to get around this problem with windows machines is that
pygame offers the option of windows with no frame (so no minimise/close
buttons and all that stuff that swallows timing accuracy). By creating a
window with no frame that is the size of the screen you can get the
benefits of fullscreen mode without actually causing the monitor to
change modes. (Its also particularly useful when using cambridge
research systems Bits++ box which doesn't like the mode change.)
all the best
Jon
----- Original Message -----
From: "Timothy Vickery" <tim.vickery@xxxxxxxxx>
To: <visionegg@xxxxxxxxxxxxx>
Sent: Wednesday, August 18, 2004 9:18 AM
Subject: [visionegg] Re: Dropped frame detection reliability, frame
histogram accuracy
I hope you're not confused by the initial GUI screen asking for frame
rate -- this does not set it, it only tells Vision Egg what to expect!
(This is because there is no easy cross-platform way to set frame
rate.
It may be possible on a platform-by-platform basis, but I haven't yet
felt like inflicting that pain on myself.) So, it sounds to me like
you're actually doing 60 Hz. What does your monitor tell you? The
average framerate computed by the Vision Egg?
Well, this is strange. I did think it was odd that the
targetBackground.py demo would be too much for my card to handle. I do
have the video card set at the right frequency - 75Hz - and when I run
programs windowed I get the time values clustered at 13ms, as you
would expect. However, for some reason when I run any of the demos
full screen, I get what appears to be a 60Hz refresh rate...
To be absolutely clear, I have resolution set to 1024x768, 75Hz, and
when I run any of the demos at this resolution, but leave the
Fullscreen box unchecked, I get 75fps. Checking the box invariably
gives me 60Hz. I never noticed this before. Any ideas?
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