RunService.Heartbeat Timer

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#1

Hi,

So I’m wondering on how to properly create a timer using RunService.Heartbeat, which involves getting the DeltaTime, and subtracting the time with it, but from my attempts, I have never been able to set it up properly, but here is the current code I was testing with:

dur = 60 -- the duration
t = dur -- the current time
repeat
    local dt = RunService.Heartbeat:Wait() -- DeltaTime

    t = math.max(0, t - (dt/dur)) -- Sets a Limit to the number while setting the DeltaTime divided by the duration.
    print(t/dur) -- test print
until t == 0 -- will stop when this condition is met

Would this work? or am I doing something wrong?

(This is a bit vague ik. I dont have the time to complete it, which ill do later)

#2

You need to do t - dt only, so:

    t = math.max(0, t - dt) -- Sets a Limit to the number while setting the DeltaTime divided by the duration.
No need to put parenthesis btw as divisions occur before subtractions.
1 Like
#3
  1. Instead of using repeat and until, you can use a while loop with the condition t > 0. This makes the code more readable and easier to understand.
  2. The calculation for updating the timer should be t = t - dt, not t = math.max(0, t - (dt/dur)). This is because dt is already the time elapsed since the last frame, so you can subtract it directly from t.
#4

It does not? repeat should be easier (if not the same) to read than a while loop.

I know. Thats what deltaTime is.

I thought Dividing it would have it run for the amount given for the Duration, but appearently that only make it slower, and was incorrect.

#5

Thanks btw

#6

Your welcome :). ..

1 Like
#7

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