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windrose

Info

Windrose is a javascript browser/node module that converts compass degrees into compass points and vice versa.

Getting Started

NPM

npm install windrose --save

Bower

bower install windrose --save

Usage

Node

var Windrose = require('windrose');

Windrose.getPoint(225);       /* returns { symbol: 'SW', name: 'South West', depth: 1 } */
Windrose.getPoint(236.25);    /* returns { symbol: SWbW, name: 'South West by West', depth: 3 } */

Windrose.getPoint(236.25, { depth: 0 });    /* returns { symbol: 'W', name: 'West', depth: 0 } */

Windrose.getDegrees('S');     /* returns { min: 174.375, value: 180, max: 185.625 } */
Windrose.getDegrees('South'); /* returns { min: 174.375, value: 180, max: 185.625 } */

Windrose.getDegrees('S', { depth: 0 });     /* returns { min: 135, value: 180, max: 225 } */

Browser

Just include it in your html:

<script type="text/javascript" src="windrose.js">

The Windrose object will be available in your global scope.

It also supports AMD.

API

Windrose.getPoint(degrees, opts)

degrees (number) the degrees to convert to point (only valid if >= 0 or <= 360)
opts (object) options hash [optional]
- depth (integer) the depth of search it can be a value between 0 and 3.
With value 0, it only returns the 4 main compass points (N, E, S, W).

With value 1 returns the main 8 compass points (N, NE, E, SE, S, SW, W, NW).

With value 2 returns the main 16 compass points (N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW).

With value 3 returns the 32 points of the compass.

With value 4 returns the 64 points of the compass.

With value 5 returns the 128 points of the compass.

Any other value will return undefined.

Windrose.getDegrees(name, opts)

name (string) the name or symbol of the compass point to convert to degrees
opts (object) options hash [optional]
- depth (integer) the depth of search it can be a value between 0 and 5.