That is a good point. I tested it out, and the useless "set angle"
results in about 70ms of wasted time every second (7% CPU). I am
surprised it is so high. Doing the test and skipping it is a
thousand times faster. I fixed up the script as my own exercise for
the student. You can see the time lag slightly when the computer is
busy with something else, like loading a web page.
Note: the angle calculations had to be changed to match what the
angle returned for these graphics. The clock is in my user space
(see3d). It takes a licking, but keeps on ticking...
on openCard
setTime
end openCard
on setTime
set the itemDelimiter to ":"
put word 1 of the long time into T --8:13:15
put T & char 2 to 5 of (the long seconds mod 1) into fld "Time"
get 360+90-(30 * item 1 of T) - trunc((item 2 of T) / 2)
if (the angle of grc "Hour") <> it then set the angle of grc
"Hour" to it
get 360+90-(6 * item 2 of T) - trunc((item 3 of T) / 10)
if (the angle of grc "Minute") <> it then set the angle of grc
"Minute" to it
set the angle of grc "Second" to 360+90-(6 * item 3 of T)
send "setTime" to me in 1-(the long seconds mod 1) seconds
end setTime
Dennis
On May 30, 2005, at 2:21 PM, Geoff Canyon wrote:
On May 30, 2005, at 10:04 AM, Dennis Brown wrote:
Nice! I learn something every minute on this list --four heads
are better than one. I do believe that the clock is down to its
essence now. Every line does something essential, except
displaying the "Time" field to check its accuracy. I put the
latest version in my user space also (see3d).
re: down to its essence -- obviously for this demo it doesn't
matter, but in practice, I would want to put in code to only change
the minute and hour hands when they actually need it, rather than
setting them to the same startAngle (except when they actually
move) each second. I haven't timed this to see whether it's
actually a concern.
And multiple heads are definitely better than one. That's why I
plan to grow additional heads as soon as possible. ;-)
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