A background disproportionately consumes CPU

[Batrachus]

In love.load I have this:

Code: Select all

love.graphics.setColorMode("replace")
nebe = love.graphics.newImage("nebe.png")
...

And in love.draw:

Code: Select all

love.graphics.setBackgroundColor(152, 68, 0)
love.graphics.draw(nebe, 0, 0, 0, 1, 1, 0, 0)
love.graphics.setColor(0, 0, 0)
...

The file nebe.png looks like this:



When I have runned my game, it consumes 99% of CPU. Where is the fault? I'm sorry I'm writing here two times in one day.

[Lafolie]

I'm sorry I'm writing here two times in one day.

I can't answer/solve the problem, but I can say that you shouldn't worry things like that, silly. If you have a problem and you need help, there's no shame in asking for it

[TechnoCat]

When I have runned my game, it consumes 99% of CPU. Where is the fault? I'm sorry I'm writing here two times in one day.

LOVE will use as much CPU as it can get its grubby little fingers on. It doesn't mean you're low on power necessarily.

Try printing your FPS to make sure it isn't low.

[Batrachus]

Without background image the FPS stabilized on 61. With background image it was less than 1.

[TechnoCat]

Without background image the FPS stabilized on 61. With background image it was less than 1.

Can we see more code then?

[Lafolie]

Ooooh yeah, this is interesting. I'd like to test this out also.

[Batrachus]

Code: Select all

mapa = {}
dolu = 0
nahoru = 0
poloha = 50

function round(num)
	return num - (num % 1)
end

function getVyska()
	zlomek = poloha % 1
	return (mapa[poloha - (poloha % 1)] + (mapa[poloha + 1 - ((poloha + 1) % 1)] - mapa[poloha - (poloha % 1)]) * zlomek)
end

function love.load()
	love.graphics.setColorMode("replace")
	obrazek_postavy = love.graphics.newImage("postava.png")
	love.graphics.draw(nebe, 0, 0, 0, 1, 1, 0, 0)
	math.randomseed(os.time())
	nahoru = math.random(1, 2)
	dolu = math.random (-2, -1)
	mapa[0] = math.random(0, 600)
	for i = 1, 1000 do
		nahoru = nahoru + math.random(-1, 1)
		if nahoru < 1 then nahoru = 1 end
		dolu = dolu + math.random(-1, 1)
		if dolu > -1 then dolu = -1 end
		mapa[i] = mapa[i-1] + math.random(dolu, nahoru)
	end
end

function love.update(dt)
	if love.keyboard.isDown("left") and poloha > 50 then poloha = poloha - 1/math.sqrt(8 + (math.abs(mapa[round(poloha)+1] - mapa[round(poloha-1)+1]))) end
	if love.keyboard.isDown("right") and poloha < 950 then poloha = poloha + 1/math.sqrt(8 + (math.abs(mapa[round(poloha)] - mapa[round(poloha+1)]))) end
	if love.keyboard.isDown("down") then mapa[round(poloha, 0)] = mapa[round(poloha, 0)] + 1 end
	
end

function love.draw()
	love.graphics.setBackgroundColor(152, 68, 0)
	nebe = love.graphics.newImage("nebe.png")
	love.graphics.setColor(0, 0, 0)
	for i = 1, 1000 do
		love.graphics.polygon(
			"fill",
			(i-1)*8-poloha*8+400,
			mapa[i-1]-getVyska()+300,
			i*8-poloha*8+400,
			mapa[i]-getVyska()+300,
			i*8-poloha*8+400,
			100000-getVyska()+300,
			(i-1)*8-poloha*8+400,
			100000-getVyska()+300
		)
	end
	love.graphics.draw(obrazek_postavy, 384, 272, 0, 1, 1, 0, 0)
	love.graphics.print(love.timer.getFPS(), 30, 30, 0, 1, 1)
end

NOTE: postava.png is small and negligible 32×32 image
NOTE 2: variable names are in czech.

[TechnoCat]

You're calling newImage in draw. So it creates a new image every frame.
move newImage to love.load()

[Batrachus]

Wat? I bet when I was programming the game, it wasnt so. And altrough I fixed it, still it doesnt work.

[Lafolie]

Love is an aggressive application, it will always be intensive to some extent.