Created
June 19, 2019 19:52
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require 'victor' | |
require 'rgb' | |
WIDTH=3840 | |
HEIGHT=2160 | |
prng = Random.new | |
RING_RAD = prng.rand(30..80) | |
ANGLE_SPREAD=Random.new.rand(3..10) | |
HUE_STEP = 0.5 / ( WIDTH / RING_RAD) | |
svg = Victor::SVG.new width: WIDTH, height: HEIGHT, style: { background: '#111' } | |
Seed = Struct.new :angle, :x, :y | |
start_hue = prng.rand(0.0..1.0) | |
color = RGB::Color.from_fractions(start_hue,1.0,0.7) | |
svg.build do | |
rect x: 0, y: 0, width: WIDTH, height: HEIGHT, fill: '#111' | |
css['.rings'] = { | |
stroke: color.to_rgb_hex, | |
stroke_width: 1, | |
"fill-opacity": 0.0 | |
} | |
circle cx: WIDTH/2, cy: HEIGHT/2, r: 2, fill: '#FFF' | |
seeds = (1..3).map do |i| | |
prng.rand(0...360) | |
end.map do |angle| | |
rad = 2.0 * Math::PI * angle / 360.0 | |
x = WIDTH/2 + RING_RAD * Math.cos(rad) | |
y = HEIGHT/2 + RING_RAD * Math.sin(rad) | |
Seed.new angle, x, y | |
end | |
seeds.each do |seed| | |
path d: ['M', WIDTH/2, HEIGHT/2, 'L', seed.x, seed.y ], stroke: color.to_rgb_hex, stroke_width: 1 | |
end | |
hue = start_hue | |
RING_RAD.step([WIDTH,HEIGHT].max, RING_RAD) do |r| | |
hue = ( hue + HUE_STEP ) % 1.0 | |
color = RGB::Color.from_fractions(hue,1.0,0.7) | |
circle cx: WIDTH/2, cy: HEIGHT/2, r: r, class: 'rings', stroke: color.to_rgb_hex | |
last_seeds = seeds | |
seeds = Array.new | |
last_seeds.each do |seed| | |
(1..(prng.rand(1..3))).map do |i| | |
prng.rand((seed.angle-ANGLE_SPREAD)..(seed.angle+ANGLE_SPREAD)) | |
end.map do |angle| | |
rad = 2.0 * Math::PI * angle / 360.0 | |
x = WIDTH/2 + r * Math.cos(rad) | |
y = HEIGHT/2 + r * Math.sin(rad) | |
Seed.new angle, x, y | |
end.each do |next_seed| | |
path d: ['M', seed.x, seed.y, 'L', next_seed.x, next_seed.y ], stroke: color.to_rgb_hex, stroke_width: 1 | |
seeds << next_seed | |
end | |
end | |
seeds = seeds.uniq | |
end | |
end | |
svg.save 'tree' |
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