application:getFps() always "60"

UglyOwl · December 2015

I've been digging for the answer, couldn't find why

application:getFps()

always returns "60". It stays the same if I change Hardware Frame Rate in the Player or change FPS in the project settings.

(But I figured out how event.deltaTime works

It's a neat one)

SinisterSoft · December 2015

it works for me. What are you using OSX or Windows?

UglyOwl · December 2015

It's under Windows, Gideros 2015.10.
The code is like this:

stage:addEventListener(Event.ENTER_FRAME, function(event)
	bmp:setRotation(bmp:getRotation()+50*event.deltaTime);
    text:setText(tostring(application:getFps()) .. ", deltaTime=" .. tostring(event.deltaTime))
end)

SinisterSoft · December 2015

I have this at the beginning of the code:

local frameRate=application:getFps()

Then this in the enter_frame event...

	local skip=event.deltaTime*frameRate
	if skip>1.2 then
		if frameBalancer<(#objectsAvailable-8) then
			frameBalancer=frameBalancer+5
		end
	end
	if skip>1.5 then
		skip=2
	else
		skip=1
		if frameCounter%30==0 and frameBalancer>0 then
			frameBalancer=frameBalancer-1
		end
	end
 
	local usage=(application:getTextureMemoryUsage()/1024)
	if usage~=oldUsage then
		oldUsage=usage
		print("Texture usage: "..usage.."MB")
	end
    local fps = 1/event.deltaTime  
	if fps<40 then print("FPS: "..floor(fps)) end
 
	frameCounter=frameCounter+1

SinisterSoft · December 2015

The balancer routine is just for me to limit the number of moving object on screen automatically to within only having 3 objects.

My game never goes over 2 frames - if it did then the skip would be too much - so I limit the skip to 2. I then multiply every movement by skip - so skip would either mult by 1 (the same number) or by 2 (I skipped a frame).

SinisterSoft · December 2015

You will need oldUsage, frameBalancer somewhere in the main program = 0.

UglyOwl · December 2015

Thank you for code snippets @SinisterSoft !

So it seems that

application:getFps()

only returns what was set by

application:setFps()

I was wrongly assuming that it's a dynamic value determined by the actual viewer

john26 · December 2015

Yes, that is exactly right. And the only options you can set are 30 or 60.

UglyOwl · December 2015

I'm still a little bit confused. How does Project Properties FPS come into play?

SinisterSoft · December 2015

that should be the value returned by getFps()

tkhnoman · December 2015

I probably wrong, but i think currently it's like this:

Desktop export : Project Properties is the only value that would be looked on, so setFps won't do anything.
Mobile export : setFps works as it should be.

john26 · December 2015

Project Properties sets the initial value of FPS when the app starts. You can then change it using setFps. This is the case for both desktop and mobile devices. Note that the value you set in setFps is a target value. The device will never run faster than this but it may be slower if the app cannot keep up.

UglyOwl · December 2015

Now it makes sense

Thank you for clarification!

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