Haversine formula: Difference between revisions
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=={{header|Perl}}== |
=={{header|Perl}}== |
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===Low-Level=== |
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{{libheader|ntheory}} |
{{libheader|ntheory}} |
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<lang perl>use ntheory qw/Pi/; |
<lang perl>use ntheory qw/Pi/; |
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{{out}} |
{{out}} |
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<pre>Distance: 2887.260 km</pre> |
<pre>Distance: 2887.260 km</pre> |
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===Idiomatic=== |
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Contrary to ntheory, Math::Trig is part of the Perl core distribution. |
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It comes with a great circle distance built-in. |
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<lang perl>use Math::Trig qw(great_circle_distance deg2rad); |
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# Notice the 90 - latitude: phi zero is at the North Pole. |
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# Parameter order is: LON, LAT |
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my @BNA = (deg2rad(-86.67), deg2rad(90 - 36.12)); |
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my @LAX = (deg2rad(-118.4), deg2rad(90 - 33.94)); |
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print "Distance: ", great_circle_distance(@BNA, @LAX, 6372.8), " km\n";</lang> |
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{{out}} |
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<pre>Distance: 2887.25995060711 km</pre> |
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=={{header|Phix}}== |
=={{header|Phix}}== |
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