On Aug 15, 06 20:37:42 -0500, Rajko M wrote:
It is interesting how people like high frame rates. We need only 30 for smooth motion, all over that serves nothing.
False statements don't get right by repeating them. OTOH frame rates for glxgears certainly don't matter, right. Note that the following numbers are very individual dependent. The eye will receive motion as relatively smooth with about 15fps. That's why film was 24fps in the beginning (have a save margin + side dependencies). You need frame rates well above 50fps in order to have really smooth motion. IMAX movies are filmed in 50fps, and I personally still feel the stuttering when watching one. The eye will stop to notice flicker at about 60fps. That's why in movie theaters film images are shown three times each (approx 72fps). Some people tend to notice montior flicker upto 100fps. The human brain will still be prone to motion sickness if the update frequency is less than 200fps. This has been experimentally verified in caves (multiside VR projection environments). Needless to say that this is only possible with extremely expensive projectors (neither LCD nor DLP). Yes, it sort-of works with lower frequency (typically you cannot recreate the graphics at 200fps anyway, I've seen cave applications with 8fps...), but you tend to feel dizzy after 15min or so. Been there, tried that. Additionally, for games the frame rate also influences response time. Typically there was a lag of 3-5 frames from input to reaction, so for 60 fps that would be a minimum of 50ms delay - which is quite long. Modern games tend to have less coupled input routines, but also lower frame rates. Matthias -- Matthias Hopf <mhopf@suse.de> __ __ __ Maxfeldstr. 5 / 90409 Nuernberg (_ | | (_ |__ mat@mshopf.de Phone +49-911-74053-715 __) |_| __) |__ labs www.mshopf.de