Everything you knew about WAIT was a lie.
First, this will be a helpful function:
DEF DELAY SEC
VAR M=MILLISEC+SEC*1000
WHILE MILLISEC<M:WEND
END
(change
MILLISEC to
MILLISEC() in SB4)
In the past, we assumed
WAIT n would always wait
n frames
However, this isn't true and somehow no one noticed(!!!)
WAIT n waits for
n frame boundaries to happen,
And this means it actually waits for between N-1 and N frames, depending on when it starts.
For example, if we start waiting halfway through a frame:
VSYNC
VSYNC
DELAY 1/60 /2 'wait half a frame
S = MILLISEC
WAIT 1
?MILLISEC-S
You might expect this to print 16 or 17 (the number of milliseconds in a frame), but it actually only prints between 7 and 9!
