On May 30, 2005, at 4:37 PM, Dennis Brown wrote:
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...
Four times faster still is comparing to a local variable rather than
to the startAngle of the graphics. It adds a few lines of code
though. It would appear that my web hosting company is down at the
moment, so the script will have to suffice:
on openCard
setTime
end openCard
local sHourAngle -- the angle for the hour hand
local sMinuteAngle -- the angle for the minute hand
on setTime
put word 1 of the long time into T
put T && the long seconds into fld "time"
set the itemDelimiter to ":"
get 90 - (30 * item 1 of T) - trunc((item 2 of T) / 2)
if it is not sHourAngle then
put it into sHourAngle
set the startangle of grc "hour" to sHourAngle
end if
get 90 - (6 * item 2 of T) - trunc((item 3 of T) / 10)
if it is not sMinuteAngle then
put it into sMinuteAngle
set the startangle of grc "minute" to sMinuteAngle
end if
set the startangle of grc "second" to 90 - (6 * item 3 of T)
send "setTime" to me in (1 - (the long seconds mod 1)) seconds
end setTime
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