From: Neil Stewart (neil.stewart@warwick.ac.uk)
Date: Sun 09 Jan 2000 - 21:35:43 IST
Hello, I am an experimental psychologist using who is trying to use Linux to write programs to measure people's psychophysical responses. This involves displaying a stimulus on the screen, and measuring the time it takes people to press a key. I need a way to control the copying from a virtual screen to the physical screen (using gl_copyscreen() or the like) so that copying takes place during the time the monitor's electron beam is moving from the bottom right of the screen back to the top left corner of the screen to begin redrawing (the flyback time). Can you tell me whether this is done automatically in the copying routines? If it is not, are there any functions I can use to either report the position of the beam, or that wait for the beam to reach the bottom right corner of the screen before returning? Thank you very much for your time and help, Neil Stewart University of Warwick England
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