Better FPS counter - GameCreators Forum

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spike 132000

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Joined: 7th Nov 2007

Location: Nottingham, UK

Posted: 22nd Jan 2014 13:48 Edited at: 22nd Jan 2014 13:50

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Hello all, it's been a while but i've recently decided to purchase DBPro

I was wandering, is there a better fps counter or fucntion around that can update the current FPS every frame instead of every second (like screen fps()), I am making a rhythm game but because of the FPS only updating once a second, it's difficult to get the sync up with the frame rate as accurate as possible, I feel this can be done using milliseconds somehow, but wanted to find out if there was already an existing function.

Thanks for your help!

Richard

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ShellfishGames

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Posted: 22nd Jan 2014 15:36

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I don't think there's another function in DBP.. possibly in some 3rd user plugin.

You could of course just do something like this:

+ Code Snippet

sync on
sync rate 0
sync

do
    cls
    
    circles = 1000 + rnd(5000)
    ink 0xFF303030,0
    for i = 1 to circles
        circle rnd(screen width()), rnd(screen height()), rnd(100)
    next 
    
    ink 0xFFFFFFFF,0
    print "FPS: ", str$(my_fps(),3)
    
    sync
loop    


global fps_time

function my_fps()
    old = fps_time
    fps_time = timer()
    tdif = fps_time - old
    fps# = 1000.0/(1.0*tdif)
endfunction fps#

(The basic formular being 1000/timedif_in_ms)

Or maybe something a little more advanced keeping track of the frame count during the last second at each point in time (as opposed to just once a second, as the DBP function does). Depending on what you really need for your game.

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Rudolpho

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Joined: 28th Dec 2005

Location: Sweden

Posted: 22nd Jan 2014 18:44

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Taking the average FPS over a longer span of time (such as a second) will give you a more reliable number since (unless it is locked to a certain sync rate) it will fluctuate quite wildly under normal circumstances. Also you can measure greater framerates than 1000 Hz in that way - you can still do this by using the perftimer function however.

"Why do programmers get Halloween and Christmas mixed up?"

+ Code Snippet

Because Oct(31) = Dec(25)

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mr Handy

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Joined: 7th Sep 2007

Location: out of TGC

Posted: 22nd Jan 2014 18:56 Edited at: 22nd Jan 2014 19:05

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Quote: "update the current FPS every frame instead of every second"

update the current Frames Per Second every frame instead of every second *flat nonsense*

I believe you want a better FPS counter that would show you a greater FPS value?

*joking*

Quote: "I feel this can be done using milliseconds somehow, but wanted to find out if there was already an existing function. "

By Fallout:

+ Code Snippet

sync on
sync rate 0
set display mode x,y,32,1
make camera 1
make camera 2
make camera 3

timeStart as double integer 
ticksPerLoop as double integer

`Work out how many perf ticks elapses in 1/30th of a second
timeStart = PERFTIMER()
wait 1000
ticksPerLoop = (PERFTIMER()-timeStart)/30

do
   timeStart = PERFTIMER()
   sync mask camera 2^1:fastsync
   sync mask camera 2^2:fastsync
   sync mask camera 2^3:fastsync
   sync mask camera 2^0
   sync
   `Wait until 1/30th of a second has elapsed
   while PERFTIMER()-timeStart < ticksPerLoop
   endwhile   
loop

You can use it with any sync rate to get something done twice per cycle or once per two cycles etc.

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