Julia set: Difference between revisions

=={{header|Julia}}==

[[File:JuliaSet_julia.png|250px|thumb|right]]

<lang julia>using Images

w, h = 800, 600

img = Array(UInt8, h, w, 3)

maxIter = 50

c = -0.8+0.156im

function hsv2rgb(h, s, v)

c = v * s

x = c * (1 - abs(((h/60) % 2) - 1))

m = v - c

r,g,b =

if h < 60

(c, x, 0)

elseif h < 120

(x, c, 0)

elseif h < 180

(0, c, x)

elseif h < 240

(0, x, c)

elseif h < 300

(x, 0, c)

else

(c, 0, x)

end

r = round(UInt8, (r + m) * 255)

g = round(UInt8, (g + m) * 255)

b = round(UInt8, (b + m) * 255)

b,g,r

end

for x in 1:w

for y in 1:h

i = maxIter

z = Complex((x - w/2) / w * 3, (y - h/2) / h * 2)

while abs(z) < 2 && (i -= 1) > 0

z = z*z + c

end

r,g,b = hsv2rgb(i / maxIter * 360, 1, i > 1 ? 1 : 0)

img[y,x,1] = r

img[y,x,2] = g

img[y,x,3] = b

end

end

save("JuliaSet.png", colorim(img, "RGB"))</lang>