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42 lines
819 B
42 lines
819 B
11 years ago
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-- Translated from ecmascript-testcases/test-dev-mandel2-func.js.
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function mandel()
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local w = 80
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local h = 40
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local iter = 100
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local i, j, k
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local x0, y0, xx, yy, c, xx2, yy2
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local res
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for i=0,h-1 do
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y0 = (i / h) * 4.0 - 2.0
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res = {}
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for j=0,w-1 do
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x0 = (j / w) * 4.0 - 2.0
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xx = 0
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yy = 0
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c = '#'
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for k=0,iter-1 do
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xx2 = xx*xx
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yy2 = yy*yy
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if xx2 + yy2 < 4.0 then
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yy = 2*xx*yy + y0
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xx = xx2 - yy2 + x0
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else
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c = '.';
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break
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end
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end
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table.insert(res, c)
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end
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print(table.concat(res))
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end
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end
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mandel()
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