A Ruby library for working with compass points.
- Project page: http://github.com/infused/compass_point
- API Documentation: http://rubydoc.info/github/infused/compass_point/
- Report bugs: http://github.com/infused/compass_point/issues
Compass Point is tested to work with the following versions of ruby:
- MRI Ruby 2.0.x, 2.1.x, 2.2.x, 2.3.x, 2.4.x, 2.5.x, 2.6.x
- JRuby 1.7.x
gem install compass_point
Given an string such as "NW", "SE", "Northeast by east", or "N 20° W",
return the corresponding azimuth in degrees from 0 to 360:
CompassPoint.azimuth('N') #=> 0.0 CompassPoint.azimuth('S') #=> 180.0 CompassPoint.azimuth('swbs') #=> 213.75 CompassPoint.azimuth('Northeast by east') #=> 56.25 CompassPoint.azimuth('N 20° W') #=> 340
back_azimuth to find the opposite azimuth:
CompassPoint.azimuth('N') #=> 180.0 CompassPoint.azimuth('S') #=> 0.0 CompassPoint.azimuth('swbs') #=> 33.75
You can also get the minimum and maximum azimuths for any
CompassPoint.min('E') #=> 84.38 CompassPoint.max('E') #=> 95.62 CompassPoint.min('Northeast by east') #=> 50.63 CompassPoint.max('Northeast by east') #=> 61.87 CompassPoint.min_max('E') #=> [84.38, 95.62] CompassPoint.min_max('Northeast by east') #=> [50.63, 61.87]
Get the full name for an abbreviation:
CompassPoint.name('NNW') #=> "North northwest" CompassPoint.name('SEbS') #=> "Southeast by south"
Compass Quadrant Bearing
Given an azimuth, calculate the compass quadrant bearing. For example:
CompassPoint.compass_quadrant_bearing(103) #=> "S 77° E" CompassPoint.compass_quadrant_bearing(340) #=> "N 20° W" CompassPoint.compass_quadrant_bearing(0) #=> "N"
Copyright (c) 2015-2019 Keith Morrison <firstname.lastname@example.org>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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