Question about Time.realTimeSenceStartUp is there a realTimeSenceClose or exit etc?

Unity Engine
1

I am attempting to calculate something based on the amount of time sence the game has last been closed. I have found that there is a really nice function that i can use that is Time.realTimeSensceStartUp; that is great and tracks the time from start up… I was just wondering if there was a nice built in function i could use to track the time sence the last exit of the game. Or would i just need to write my own function that saved the time of exit somehow and subtracted it from the next time on opening?

Thanks any tips/suggestions would be great.

2

There’s nothing built in to Unity for that, but you can use System.DateTime.Now and a little bit of file saving to determine this.

3

thanks i actually just stumbled upon that, what namespace do i need to use to allow me to access the DateTime. functions? i have not been able to work it out. i thought just adding "Using System.Net; " would let me use it but it has not.

4

also what is the System.DateTime.now ? such as is it an int, long, double, float, string, etc? thank you for pointing me in the right direction

5

System.DateTime is the class that is returned by System.DateTime.Now. When I’ve done this in the past, I’ve stored and used System.DateTime.Now.Ticks which is a long int (there are 100,000 of them in 1 second IIRC) - store it as a long, subtract the new one (again as a long), divide by 100000, and boom, you’ve got the number of seconds that have elapsed.

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6

thank you! I will give this a shot

7

this sounds so much simpler then i am making it… Not sure why i am not quiet getting this… I will keep working on it, could you give me snipit of how you would do the division? for some reason i keep bugging out when i try to divide anything here.

8

It’s not unreasonable for this to be difficult in practice - you have to make sure that your numbers are exactly the right type every step of the way, or you’ll lose data and your numbers will get weird. Unfortunately I don’t have the script I used at the time (it was at my last job).

Just make sure that you subtract the previous time from the current time before you deal with anything that’s not a long; from there I think I divided it by 1000 to get it to hundredths of seconds, then converted that to a float, then divided that float by 100f. I believe that was enough to avoid range problems.

If that doesn’t help, I will try to answer more specific questions you have about it.

1 Like
9

thank you, I think the issue is just that i am not the best with math to be completely honest. I will keep playing with it.