c++ VS 2012 calculate the FPS in the game

[VDV777]

I want to calculate the FPS in the game and put in my dirextX menu.

How to do it? Interested in source code.
Here's what I found on the Internet at:

DWORD FrameCnt;
float TimeElapsed;
float FPS;
float oldTime;
float newTime;
float deltatime;

FrameCnt++;
newTime = GetTickCount();
deltatime = newTime - oldTime;
TimeElapsed += deltatime;

if(TimeElapsed >= 500.0)
{
FPS = 1000*(float)FrameCnt / TimeElapsed;
TimeElapsed = 0.0f;
FrameCnt = 0;
}

But it does not work.

[abuckau907]

GetTickCount function (Windows)

Syntax
C++

DWORD WINAPI GetTickCount(void); // Returns a DWORD, not float.

[AnVIRUS]

char* GetFPS(void)
{

static int FPScounter = 0;
static float FPSfLastTickCount = 0.0f;
static float FPSfCurrentTickCount;
static char cfps[6] = "";

FPSfCurrentTickCount = clock() * 0.001f;
FPScounter++;
if((FPSfCurrentTickCount - FPSfLastTickCount) > 1.0f)
{
FPSfLastTickCount = FPSfCurrentTickCount;
sprintf(cfps," %d",FPScounter);
FPScounter = 0;
}
return cfps;
}

Using:
DrawText(X,Y,color, GetFPS(), style);

[Hell_Demon]

Why measure once per second? Just take the time between two consecutive frames and calculate framerate from that.

[atom0s]

Where are you handling the calculations for the fps as well? If you aren't properly checking each frame you technically will never get valid results.

The code you posted will also never work properly if you are just tossing all of it into a single function since all your variables will reset each call that is made to calculate the fps.

[Hell_Demon]

Where are you handling the calculations for the fps as well? If you aren't properly checking each frame you technically will never get valid results.

The code you posted will also never work properly if you are just tossing all of it into a single function since all your variables will reset each call that is made to calculate the fps.

If you're refering to anvirus, he uses static which means they're not reset as they have a static address

[atom0s]

I was referring to the main post.