https://github.com/mikolalysenko/compare-angle

Compares two angles with a common edge
https://github.com/mikolalysenko/compare-angle

Last synced: 2 months ago
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Compares two angles with a common edge

• Host: GitHub
• URL: https://github.com/mikolalysenko/compare-angle
• Owner: mikolalysenko
• License: mit
• Created: 2014-04-20T22:40:23.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-04-28T22:31:14.000Z (over 10 years ago)
• Last Synced: 2024-10-20T14:28:22.357Z (2 months ago)
• Language: JavaScript
• Size: 152 KB
• Stars: 0
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
compare-angle

=============

Let A, B, C and D be four points in the plan.  Then of the pair of angles ABC and ABD, determine which is larger.

```

  C

  *      D

   \     *

    \ABC/

     \ / ABD

      *-------------*

      B             A

```

Example

=======

```javascript

var compareAngle = require("compare-angle")

var A = [2, 0]

var B = [0, 0]

var C = [-1, 2]

var D = [1, 1]

console.log(compareAngle(A, B, C, D),  compareAngle(A, B, D, C))

```

Output:

```

1   -1

```

Install

=======

```

npm install compare-angle

```

API

===

#### `require("compare-angle")(a, b, c, d)`

Compares the angles ABC and ABD to determine which is greater.

* `a`, `b` are the base points of the angle

* `c` is the end of the first angle

* `d` is the end of the second angle

**Returns** A number indicating which angle is larger

* `+1` if angle ABC is greater than angle ABD

* `0` if the angles are equal

* `-1` if angle ABD is greater than angle ABC

Credits

=======

(c) 2014 Mikola Lysenko. MIT License