a way to overwrite a color

[stout]

What i am trying to achive is that when i draw the transparent square (the black one) over the red one, it'll make it so you cant see the red one, but see the background.

Code: Select all

alpha1 = 255


function love.draw()


	love.graphics.setBackgroundColor(255,255,255) -- set background color to white so we can see what we're doing

	love.graphics.setColor(0,255,0) -- green
	love.graphics.polygon('fill', 100, 100, 200, 100, 150, 200) -- draw a triangle
	
	love.graphics.setColor(0,0,0,alpha1) -- black, with a variable defined with our alpha (transparency)
	love.graphics.rectangle("fill",100,100,100,100) -- a square

	if viewBlock == 1 then
		love.graphics.setColor(255,0,0,50) -- red, with a little bit of alpha just for illustration; 0 = transparent
		love.graphics.rectangle("fill",100,100,100,100) -- a square
	end
end

function love.keypressed(key)
     -- press A or B to switch the block transparencies
	if key == "a" then
		alpha1 = 255
		viewBlock = 0
	end
	if key == "b" then
		alpha1 = 0
		viewBlock = 1
	end
end

I think this illustrates the effect you're going for, but I don't know if it's the way you want to do it.

[rokit boy]

Thanks for guiding me to stencils! it worked!
special thanks to boolshet on irc!

[kikito]

Thanks from my part too. I didn't know the Stencil functions.