On 5/14/07, Bill Galbraith wrote:
If I remember correctly, the human eye can detect something less than
about
15-20 fps.
The number that comes to my mind is about 22? Movies that you'd see in a
theater run at 24 fps I believe.
One aditional element though that is *critical* is that this has to be an
absolutely rock solid rate for it to look smooth. The human eye is really
good at picking out changes in frame rate even above this threashold. If
you are running at 60fps and drop just one frame (so you run at 30fps for
one cycle), your eye can pick out the discontinuity in motion.
This is a why I'm a huge advocate of turning on the sync to vblank feature
on the video card. It generally makes FlightGear run so much smoother
because it forces the frame rates to be more consistant.
Curt.
--
Curtis Olson - University of Minnesota - FlightGear Project
http://baron.flightgear.org/~curt/ http://www.humanfirst.umn.edu/
http://www.flightgear.org
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