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# File 'lib/wiki/favicon.rb', line 6
def create_blob
canvas = PNG::Canvas.new 32, 32
light = PNG::Color.from_hsv(256*rand,200,255).rgb()
dark = PNG::Color.from_hsv(256*rand,200,125).rgb()
angle = 2 * (rand()-0.5)
sin = Math.sin angle
cos = Math.cos angle
scale = sin.abs + cos.abs
for x in (0..31)
for y in (0..31)
p = (sin >= 0 ? sin*x+cos*y : -sin*(31-x)+cos*y) / 31 / scale
canvas[x,y] = PNG::Color.new(
light[0]*p + dark[0]*(1-p),
light[1]*p + dark[1]*(1-p),
light[2]*p + dark[2]*(1-p))
end
end
PNG.new(canvas).to_blob
end
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