Making an Advanced On-Screen Timer

[CamtheCat]

Okay, so I'll be the first to admit that I suck at math, so for the past few days I've been wracking my brain trying to figure out how to get a modulus operator to work for an advanced timer, if at all possible.

I searched on the ZDoom Wiki about implementing on-screen timers via print & HUD Message, & found this nice ACS script example:

-------------------------------------------------------------------
script 1 ENTER
{
int t;
while(TRUE)
{
t = Timer() / 35;

HudMessage(d:t/60, s:":", d:(t%60)/10, d:t%10;
HUDMSG_PLAIN, 1, CR_RED, 0.95, 0.95, 2.0);

Delay(35);
}
}
-------------------------------------------------------------------


But this timer's smallest unit of time is the 'second', & what I am trying to accomplish is to basically make a more advanced timer that counts even more accurately to 'tenths of a second'.

Now, I don't know if this is even possible due to the limitations of using 'tics' as units of time instead of 'seconds', but it at least seemed mathematically possible, but I am stumped how to get the timer to correctly tally 'tenths of a second'.

I even tried some pretty crummy math to get 35 'tics' = 1 'second' to be the same as 3.5 'tics' = 1/10th of a 'second' or (35/10) 'tics' = 1/10th of a 'second', but again, I suck at modulus operators.

So...is this even possible at all, or is the 'second' the smallest unit of time able to be calculated in a DOOM timer?

[boris]

Did you try to calculate with fixed point values instead of integers? Dunno how it's handled in ACS, but my guess is that something like 35/10 is 3 and not 3.5 (i.e. no type conversion).

[RestlessRodent]

You can use leap time!

Get the current time in tics, divide that by 10 and you get your tenths of a second. Then for every other run, add 1 to that current time.

[scifista42]

The solution can look like this:

--------------------------------------------------
script 1 ENTER
{
int t;
int t2;
while(TRUE)
{
t2 = Timer();
t = t2 / 35;

HudMessage(d:t/60, s:":", d:(t%60)/10, d:t%10,s:":",d:(t2%35)*10/35;
HUDMSG_PLAIN, 1, CR_RED, -0.9, 0.95, 2.0);

Delay(2);
}
}
--------------------------------------------------

The "-0.9" as x parameter is just for better visual appearance.

[CamtheCat]

scifista42 said:
The solution can look like this:

--------------------------------------------------
script 1 ENTER
{
int t;
int t2;
while(TRUE)
{
t2 = Timer();
t = t2 / 35;

HudMessage(d:t/60, s:":", d:(t%60)/10, d:t%10,s:":",d:(t2%35)*10/35;
HUDMSG_PLAIN, 1, CR_RED, -0.9, 0.95, 2.0);

Delay(2);
}
}
--------------------------------------------------

The "-0.9" as x parameter is just for better visual appearance.

Damn, see, I would have never figured that out with my half-assed math. Thank you all for taking the time to respond & provide your own solutions.