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Constrained random points on a circle: Difference between revisions
Constrained random points on a circle (view source)
Revision as of 12:18, 23 January 2015
, 9 years ago→{{header|Ruby}}: add algorithm 2:
(Nimrod -> Nim) |
(→{{header|Ruby}}: add algorithm 2:) |
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=={{header|Ruby}}==
Create the image with [[Raster graphics operations/Ruby]]
<lang Ruby>points = (1
end
(-15..15).each do |row|
puts
end
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pixmap.save_as_png(pngfile)</lang>
{{out}}
[[File:constrainedrandompointsonacircle.png|thumg|right|Sample output from Ruby program]]
<pre> X X
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X X X
X X</pre>
===algorithm 2:===
<lang ruby>r2 = 10*10..15*15
range = (-15..15).to_a
points = range.product(range).each_with_object([]) do |(i,j), pt|
pt << [i,j] if r2.cover?(i*i + j*j)
end
puts "Precalculate: #{points.size}"
pt = Hash.new(" ")
points.sample(100).each{|i,j| pt[[i,j]] = " o"}
puts range.map{|i| range.map{|j| pt[[i,j]]}.join}</lang>
{{out}}
<pre>
Precalculate: 404
o o o
o o o o
o o o o o
o o o o o o
o o o o o
o o
o o
o o o
o o o
o o o o
o o
o
o
o o
o o o
o
o o o o o
o o o
o o o o
o
o o o
o o o
o o o o o o
o o o o o o o o o
o o o o o
o o o o o o
o o o o o
o o
o
</pre>
=={{header|Run BASIC}}==
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