https://github.com/mikolalysenko/left-right

Computes the orientation of 3 points in a plane
https://github.com/mikolalysenko/left-right

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Computes the orientation of 3 points in a plane

• Host: GitHub
• URL: https://github.com/mikolalysenko/left-right
• Owner: mikolalysenko
• License: mit
• Created: 2013-09-19T19:13:37.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2014-06-05T15:37:22.000Z (over 10 years ago)
• Last Synced: 2024-12-16T22:35:06.096Z (10 days ago)
• Language: JavaScript
• Size: 141 KB
• Stars: 0
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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left-right

==========

Tests if 3 points are oriented clockwise, counter-clockwise or colinear.

**WARNING** This module is deprecated.  You should use [robust-orientation](https://www.npmjs.org/package/robust-orientation) instead.

## Example

```javascript

var lr = require("left-right")

console.log(lr([1, 0], [0, 0], [0, 1]))

//Prints out:  -1

```

## Install

    npm install left-right

    

## API

### `require("left-right")(a, b, c)`

Computes the orientation of `a`, `b`, `c`

* `a,b,c` are 3 2d points, encoded as arrays

**Returns** One of the following values:

* 1 if `a,b,c` are counter clockwise oriented

* -1 if `a,b,c` are clockwise

* 0 if they are colinear

## Credits

(c) 2013 Mikola Lysenko. MIT License