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using Luxor, Colors | |
function main(fname) | |
Drawing(600, 600, fname) | |
origin() | |
circle(O, 290, :clip) | |
sethue("white") | |
paint() | |
colors = [Luxor.julia_purple, Luxor.julia_blue, Luxor.julia_green, Luxor.julia_red] | |
# make a table with rows smaller in the middle | |
progression = [70, 55, 47, 40, 30, 20, 14] | |
fatrows = vcat(progression, reverse(progression)) | |
# every other row is blank | |
thinrows = fill(12, 2 * length(progression)) | |
table = Table(collect(Iterators.flatten(zip(fatrows, thinrows))), [500]) | |
L = length(table) | |
wavelength = 70 | |
for (pos, n) in table | |
table.rowheights[n] < minimum(progression) && continue # skip thin rows | |
# march through the four Julia colors | |
col = convert(Int, min(1 + floor((n - 1) / L * 4), 4)) | |
sethue(colors[col]) | |
@layer begin | |
translate(pos) | |
# amplitude of sine scales by y coordinate | |
sf = rescale(abs(pos.y), 0, 300, 5, 32) | |
pts = [Point(x, sf * sin(x * 1 / wavelength)) for x = -300:300] | |
setline(table.rowheights[n]) | |
poly(pts, :stroke) | |
end | |
end | |
# outer ring | |
#@layer begin | |
# setcolor("#635") | |
# setline(30) | |
# circle(O, 291, :stroke) | |
#end | |
finish() | |
preview() | |
end | |
main("/tmp/juliaclimate-gf1.png") |
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