01/21/2003
15-462 Computer Graphics I
12
Screen Refresh
•Common:
60-100 Hz
•Flicker
if drawing overlaps screen refresh
•Problem
during animation
•Example
(cube_single.c)
•Solution
two frame buffers:
–Draw
into one buffer
–Swap
and display, while drawing into other buffer
•Desirable
frame rate >= 30 fps (frames/second)