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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@520 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
49 lines
865 B
Ruby
49 lines
865 B
Ruby
# random dot steraogram
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# usage: rcs.rb rcs.dat
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sw = 40.0 # width of original pattern
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dw = 78.0 # width of generating Random Character Streogram
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hdw = dw / 2.0
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w = 20.0 # distance between eyes
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h =1.0 # distance from screen and base plane
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d = 0.2 # z value unit
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ss="abcdefghijklmnopqrstuvwxyz0123456789#!$%^&*()-=\\[];'`,./"
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rnd = srand()
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while gets()
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# print($_)
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xr = -hdw; y = h * 1.0; maxxl = -999
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s = "";
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while xr < hdw
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x = xr * (1 + y) - y * w / 2
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i = (x / (1 + h) + sw / 2)
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if (1 < i && i < $_.length);
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c = $_[i, 1].to_i
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else
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c = 0
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end
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y = h - d * c
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xl = xr - w * y / (1 + y);
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if xl < -hdw || xl >= hdw || xl <= maxxl
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tt = rand(ss.length)
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c = ss[tt, 1]
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else
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c = s[xl + hdw, 1]
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maxxl = xl
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end
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s += c
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xr += 1
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end
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print(s, "\n")
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end
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