47 lines
965 B
Plaintext
47 lines
965 B
Plaintext
require('Imager')
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func tree(img, x1, y1, x2, y2, depth) {
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depth <= 0 && return()
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var dx = (x2 - x1)
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var dy = (y1 - y2)
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var x3 = (x2 - dy)
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var y3 = (y2 - dx)
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var x4 = (x1 - dy)
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var y4 = (y1 - dx)
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var x5 = (x4 + 0.5*(dx - dy))
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var y5 = (y4 - 0.5*(dx + dy))
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# square
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img.polygon(
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points => [
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[x1, y1],
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[x2, y2],
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[x3, y3],
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[x4, y4],
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],
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color => [0, 255/depth, 0],
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)
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# triangle
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img.polygon(
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points => [
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[x3, y3],
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[x4, y4],
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[x5, y5],
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],
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color => [0, 255/depth, 0],
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)
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tree(img, x4, y4, x5, y5, depth - 1)
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tree(img, x5, y5, x3, y3, depth - 1)
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}
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var (width=1920, height=1080)
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var img = %O<Imager>.new(xsize => width, ysize => height)
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img.box(filled => 1, color => 'white')
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tree(img, width/2.3, height, width/1.8, height, 10)
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img.write(file => 'pythagoras_tree.png')
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