# compare-angle

Compares two angles with a common edge

## Stats

StarsIssuesVersionUpdatedCreatedSize
compare-angle
001.0.18 years ago8 years ago 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
``````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