The game paused but the time keeps running (Android)

[HungerBoatz]

So I'm trying to make the game paused when player is in not focus.

For example:

Code: Select all

-- in my update callback
function love.update(dt)
    	if paused == true then return
    	else
     		   -- run the code ..
        
    	 	   -- and somewhere in my update function, I also have
    		if start_time == true then
     			time = time + dt
     		else
     			time = time + 0
     		end
 	end
end

-- in my focus callback
function love.focus(f)
	if not f then
		paused = true
		start_time = false
	else
		paused = false
		start_time = true
	end
end

And the result, my game successfully stop running and starts freezing when it gets paused. But when I'm trying to print the variable 'time' in the screen, the time keeps running and not freezing even the game paused.

Also when I press home button or back button, the time stills running in the game.

Please help

[pgimeno]

There must be something else we don't know. At first sight that should stop counting the time. Have you tried printing start_time and paused?

[HungerBoatz]

There must be something else we don't know. At first sight that should stop counting the time. Have you tried printing start_time and paused?

Yes.The start_time printed true and the paused printed false in the screen. Then when I want to slide down my notification bar and put it back again, both start_time and paused still prints the same value. But I don't have idea how to see their value when I'm not in focus, also in my IDE I dont have something like console to print() it in. Anyway, the timer changed so far when I'm back to the screen after not focusing. For example, the timer is in 2 seconds first, then after not focusing in some seconds and back again, it turned to 10 seconds or maybe 12 or 13 etc. not continuing the last second (which is 2).

[pgimeno]

Can you reproduce it with a very simple program that contains just the above code and little else?

If not, the problem is elsewhere, and if you want us to help, we'll need to see it, because no one can guess what the rest of the code is doing.

[slime]

The first dt after resuming might be very large, since it's based on the real time that elapsed since the last frame.

[HungerBoatz]

Here what I mean:

Code: Select all

function love.load()
	time = 0
	time_starts = true
	
	text = ""
	
	x = 0
	starts_moving = true
end

function love.update(dt)
	if time_starts == true then
		time = time + dt
	else
		time = time + 0
	end
	
	if starts_moving == true then
		x = x + 1
		if x > love.graphics.getWidth() then
			x = 0
		end
	else
		x = x + 0
	end
end

function love.draw()
	love.graphics.print(time)
	love.graphics.print(text, 0, 100)
	love.graphics.rectangle("fill", x, 20, 60, 60)
	love.graphics.print('x: ' .. x, 0, 200)
end

function love.focus(f)
	if not f then
		time_starts = false
		starts_moving = false
		text = "uh-oh why the timer didn't stops when not focusing?"
	else
		starts_moving = true
		time_starts = true
	end
end

[pgimeno]

So, in light of what slime has noted, the easiest fix would be to limit dt to, say, 0.1s. That would advance the clock by at most 0.1 seconds during a pause.

If that's still not desirable, well, if the love.focus() event executes, it can set a flag that would tell the love.update() event to skip that frame.

[sphyrth]

Bummer. I can't participate when the error can't be reproduced on a desktop.