(solved) Rectangle lines are to thick

[mcjohnalds45]

Rectangles drawn with love.graphics.rectangle are (at least on love 0.8.0) automatically two or three pixels wide love.graphics.setLineWidth doesn't help, it's kind of a minor thing but it would be nice if love.graphics.setLineWidth(1) made rectangles have a line width of 1.

TvN9x.png (21.2 KiB) Viewed 196 times

[bartbes]

This is something we've been struggling with, and actually, the line is one pixel wide, but it's drawn between two pixels, interpolating it to two (about) half-filled pixels.

As a temporary solution, you could move your rectangle by (0.5, 0.5).

[mcjohnalds45]

That works perfectly, thanks a bunch bartbes!

[Kingdaro]

Would it be possible to automatically move it down and right half a pixel in drawing?

[Xgoff]

Would it be possible to automatically move it down and right half a pixel in drawing?

i wonder if love itself could cheat and do a translate call each frame in love.run

who knows what that would potentially mess up, though

[Boolsheet]

In my opinion, LÖVE should not do any shifting by default. It currently places the center of the line exactly where you specify it. Adding some shifting rule complicates this for no good reason. Also, only odd line widths need the 0.5 shift to get them into the position where it matches the pixels exactly. The even widths need coordinates inbetween the pixel for that.

[Lafolie]

Also, try setting the line style to "rough" before drawing lines. I am able to get lines drawn at whole integers using this, without having to add 0.5 to the position values.

[Boolsheet]

Also, try setting the line style to "rough" before drawing lines. I am able to get lines drawn at whole integers using this, without having to add 0.5 to the position values.

Note that this will only work as long as FSAA/multisampling is turned off.

There's a way for doing the shift automatically. Well... If love.graphics.getLineWidth would actually work (it's broken in 0.8.0 and I push a patch to the developers right now) you could do something like this:

Code: Select all

local l_g_rectangle = love.graphics.rectangle
function love.graphics.rectangle(style, x, y, ...)
	if style == "line" then
		local offset = love.graphics.getLineWidth() / 2 % 1
		x = x + offset
		y = y + offset
	end
	l_g_rectangle(style, x, y, ...)
end