Re: [Dev-C++] Franerate limiter! Damn!

[<ste...@ge...>]

Here's how I made my framerate limiter: (further explanation below)


#include <time.h>  /* Contains the clock_t type definition,  for the =
framerate-measure  */
#include <conio.h>  /* Contains the kbhit() function, which we'l use for =
the mainloop  */

void Game(void)
{
    int F;  /* Frame counter  */
    const int FRAMERATE =3D 160;  /*  We need a framerate @ 160fps or =
less  */
    clock_t Fstart, Fend;  /*  Time variables  */

    F =3D 0;
    Fstart =3D clock();
    Fend =3D clock();

    /* This is the main game loop */
    while( !kbhit() )
    {
        /*  Increase our framecounter with 1, each frame/gameloop  */
        F++;
        /* Here we keep looping, until we have decreased
            the framerate to FRAMERATE fps */
        while( int( F / ( (1+Fend-Fstart) / CLK_TCK ) ) > int(FRAMERATE) =
)
        {
            Fend =3D clock();
        }
    }
}


Further explanation:

A framerate is the count, of frames that is displayed each seccond. So, =
if we want a framerate of 160 frames per second (160frames / 1second), =
we can calculate the time that is supposed to pass between each frame =
like this;
TimeBetweenEachFrame =3D 1second / 160frames =3D 0.00625seconds

Okay... The "( (1+Fend-Fstart) / CLK_TCK )" is the time that has passed =
since Fstart =3D clock();  ( The "/ CLK_TCK" is to convert the =
timemeasure into seconds). The "F++;" is to keep counting the frames =
each time we make one.

So the loop goes;
while ( FramesSoFar / TimeSoFar > FrameRateWeLike )
{
    TimeSoFar +=3D TimeSinceLastLoop;
}


Bye:
So, I hope this is any good for you Ian. I'm glad to help :)
If there's anything else, just let me know.


- Stein Nyg=E5rd :)



----- Original Message -----
From: "Ian Weston" <lak...@ho...>
To: <dev...@li...>
Sent: Wednesday, June 20, 2001 8:55 PM
Subject: Re: [Dev-C++] Franerate limiter! Damn!


> hi there stein, i was just wondering if it would be possible for you =
to
send
> me the code that worked if thats ok. i would really apreciate it if =
you
> could.
>
> thanks     ian.
>
>
> >From: Stein Nyg=E5rd <ste...@ge...>
> >Reply-To: dev...@li...
> >To: <dev...@li...>
> >Subject: [Dev-C++] Franerate limiter! Damn!
> >Date: Wed, 20 Jun 2001 11:42:25 +0200
> >
> >Just ignonore my last mail, I jsut got it working :)
> >
> >Tanks!
>
> =
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