is-clockwise

2.0.2 • Public • Published

is-clockwise

stable

Returns true if the sum of signed distances is greater than zero, which can be used as a quick test for convex polygon orientation.

var isClockwise = require('is-clockwise')
var points = [ [0, 0], [1, 1], [1, 0], [0, 0] ]
 
var cw = isClockwise(points)
 
console.log(cw) // true

See robust-orientation for a stronger test that handles floating point errors and other edge cases.

Usage

NPM

isClockwise(points)

Returns true if the points are clockwise, false if counter-clockwise. Assuming cartesian space.

License

MIT, see LICENSE.md for details.

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npm i is-clockwise

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223

Version

2.0.2

License

MIT

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Collaborators

  • mattdesl