draw.circle

[bitlord]

I was wondering why it still uses lines when the line width is not 1
I use something like this

Code: Select all

function generate_circle(mode,x, y, r, w, n, r1, r2)
	local cp = {}
	if r1 == nil then r1 = 0 end
	if r2 == nil then r2 = 2*math.pi end
	local t = (r2-r1)/n
	if mode == "inner" then
		r = r-w/2
	elseif mode == "outer" then
		r= r+w/2
	end
	for i=0,n,1 do
		cp[4*i + 1] = x + (r-w/2)*math.cos(r1+i*t)
		cp[4*i + 2] = y + (r-w/2)*math.sin(r1+i*t)
		cp[4*i + 3] = x + (r+w/2)*math.cos(r1+i*t)
		cp[4*i + 4] = y + (r+w/2)*math.sin(r1+i*t)
	end
	return cp
end


function draw_quadstrip(mode, q)
	for i=1,#q-4,4 do
		love.graphics.quad( mode, q[i], q[i+1], q[i+2], q[i+3],
			q[i+6], q[i+7], q[i+4], q[i+5] )
	end
end

mode : one of "inner" "outer" "mid" , direction in which the circle gains thickness
x, y : center
r : radius
w : width
n : segments
r1 : start angle(radian)
r2 : end angle(radian)
circle = generate_circle(...)
draw_quadstrip("fill", circle)

[Robin]

I was wondering why it still uses lines when the line width is not 1

I'm sorry, what is your question?

[bitlord]

It is obvious.

Code: Select all

function love.draw()
 love.graphics.setLineWidth(30)
 love.graphics.circle( "line", 200, 200, 100, 10)
end

result:

a4TRZ.png (1.69 KiB) Viewed 761 times

[BlackBulletIV]

Ramp up that last parameters to love.graphics.circle. You might want something like 50 or so. The greater the number the more detailed the circle (and the more costly to performance, so be weary of drawing circles).

[bitlord]

but it doesn't matter since it is composed of separate lines
so you will always have artifacts

[bitlord]

example of what I mean

[vrld]

Lines and OpenGL dont play very well together. However, this will be gone in love 0.8.