Angle difference between two bearings: Difference between revisions
Angle difference between two bearings (view source)
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, 6 years agoMove to task status, multiple implementations and little controversy. Alphabetize entries
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[[Category:Geometry]]
{{
Finding the angle between two bearings is often confusing.<ref>[https://stackoverflow.com/questions/16180595/find-the-angle-between-two-bearings]</ref>
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print (getDifference(1174.8380510598456, -154146.66490124757))
print (getDifference(60175.77306795546, 42213.07192354373))</lang>
{{out}}▼
<pre>Input in -180 to +180 range▼
25.0▼
90.0▼
175.0▼
-175.0▼
170.0▼
-170.0▼
170.0▼
-170.0▼
-118.11840000000001▼
-80.71089999999998▼
Input in wider range▼
-139.58328312338563▼
-72.34391851868713▼
-161.50295230740448▼
37.29885558826936</pre>▼
=={{header|Ruby}}==▼
{{trans|C++}}▼
<lang ruby>def getDifference(b1, b2)▼
r = (b2 - b1) % 360.0▼
# Ruby modulus has same sign as divisor, which is positive here,▼
# so no need to consider negative case▼
if r >= 180.0▼
r -= 360.0▼
end▼
return r▼
end▼
if __FILE__ == $PROGRAM_NAME▼
puts "Input in -180 to +180 range"▼
puts getDifference(20.0, 45.0)▼
puts getDifference(-45.0, 45.0)▼
puts getDifference(-85.0, 90.0)▼
puts getDifference(-95.0, 90.0)▼
puts getDifference(-45.0, 125.0)▼
puts getDifference(-45.0, 145.0)▼
puts getDifference(-45.0, 125.0)▼
puts getDifference(-45.0, 145.0)▼
puts getDifference(29.4803, -88.6381)▼
puts getDifference(-78.3251, -159.036)▼
puts "Input in wider range"▼
puts getDifference(-70099.74233810938, 29840.67437876723)▼
puts getDifference(-165313.6666297357, 33693.9894517456)▼
puts getDifference(1174.8380510598456, -154146.66490124757)▼
puts getDifference(60175.77306795546, 42213.07192354373)▼
end</lang>▼
{{out}}
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-80.7109
</pre>
▲=={{header|Ruby}}==
▲{{trans|C++}}
▲<lang ruby>def getDifference(b1, b2)
▲ r = (b2 - b1) % 360.0
▲ # Ruby modulus has same sign as divisor, which is positive here,
▲ # so no need to consider negative case
▲ if r >= 180.0
▲ r -= 360.0
▲ end
▲ return r
▲end
▲if __FILE__ == $PROGRAM_NAME
▲ puts "Input in -180 to +180 range"
▲ puts getDifference(20.0, 45.0)
▲ puts getDifference(-45.0, 45.0)
▲ puts getDifference(-85.0, 90.0)
▲ puts getDifference(-95.0, 90.0)
▲ puts getDifference(-45.0, 125.0)
▲ puts getDifference(-45.0, 145.0)
▲ puts getDifference(-45.0, 125.0)
▲ puts getDifference(-45.0, 145.0)
▲ puts getDifference(29.4803, -88.6381)
▲ puts getDifference(-78.3251, -159.036)
▲ puts "Input in wider range"
▲ puts getDifference(-70099.74233810938, 29840.67437876723)
▲ puts getDifference(-165313.6666297357, 33693.9894517456)
▲ puts getDifference(1174.8380510598456, -154146.66490124757)
▲ puts getDifference(60175.77306795546, 42213.07192354373)
▲end</lang>
▲{{out}}
▲<pre>Input in -180 to +180 range
▲25.0
▲90.0
▲175.0
▲-175.0
▲170.0
▲-170.0
▲170.0
▲-170.0
▲-118.11840000000001
▲-80.71089999999998
▲Input in wider range
▲-139.58328312338563
▲-72.34391851868713
▲-161.50295230740448
▲37.29885558826936</pre>
=={{header|Sidef}}==
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</pre>
<references/>
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