60 frames per second

Blitz3D Forums/Blitz3D Beginners Area/60 frames per second

Amanda Dearheart

(Posted April) [#1]

How can a tell if my program/app is runnning at 60 fps.
For that matter, how can I find out how many frames per second my app is runnning.

xlsior

(Posted April) [#2]

Count how many times flip gets invoked every second

Kryzon

(Posted April) [#3]

it's the time difference between the current and previous frames in your program, people call this "frame time" and it's usually measured in milliseconds.

While (...)
frameTime = Millisecs() - lastTime
If frameTime = 16 Then Text(0, 0, "Running at 60 FPS")

lastTime = Millisecs()
Wend

If that frame time is close to 16.666 milliseconds then your program is running at approximately 60 frames-per-second.

This 16.666 value comes from the expression (1000.0 / 60.0) "If a second (= a thousand milliseconds) is divided into sixty slices, how many milliseconds are in one of those slices?" and then you check if the latest slice follows this rule.

Midimaster

(Posted April) [#4]

To guarantee that your app is running at 60FPS at any computer use CREATETIMER() and WAITTIMER:

FPS%=CreateTimer(60)

; Your mainloop:
While Not KeyHit(1)
      Cls
      ;Draw your screen stuff here
      Flip 0
      WaitTimer FPS
Wend

Amanda Dearheart

(Posted April) [#5]

Thanks guys

RemiD

(Posted April) [#6]

i use this code to count the frames per second (FPS) :

;before the mainloop :
Global MainLoopTimer = CreateTimer(30) ;this is used to limit the maximum FPS, but not required

;during the mainloop :
Repeat

 MainLoopMilliStart% = MilliSecs() ;the milliseconds value at the start of the mainloop

 UpdateProgram() ;update your program here

 SetBuffer(BackBuffer())
 RenderWorld()

 Color(255,255,255)
 CText("FPS = "+FPS,0,0)
  
 ;Flip(1) ;use only this line if you don't want to limit the FPS
 WaitTimer(MainLoopTimer) ;use this line and the next if you want to limit the FPS
 VWait():Flip(False)

 MainLoopMilliTime = MilliSecs() - MainLoopMilliStart ;the milliseconds time it takes to do a mainloop
 If( MainLoopMilliTime < 1 ) ;this is to prevent a division by 0 when calculating the FPS
  MainLoopMilliTime = 1
 EndIf

 FPS% = 1000.0/MainLoopMilliTime

until( keydown(1)=true )

gpete

(Posted April) [#7]

I think if you use Win 10- 60 FPS is the most Blitz can do while rendering and updating the screen- my progs all run at 60 FPS.
Some commercial games on my pc claim to run at 70+ fps but I doubt it.
Or is it because monitors run at 60 fps? hmmmm....

Amanda Dearheart

(Posted April) [#8]

RemiD, thanks!!