node package manager

polygon-direction

Polygon Direction

Determine if a polygon is clockwise or counter-clockwise

Install

npm install polygon-direction

Methods

var polydir = require("point-in-polygon");

polydir(polygon)

Returns true if a polygon is clockwise, false if it it counter-clockwise.

polygon should be an array of 2-item arrays of coordinates.

Example

 
var polydir = require("polygon-direction");
 
console.log(polydir([[5,0],[6,4],[4,5],[1,5],[1,0]]));