├── .gitignore
├── LICENSE
├── README.md
├── convexhull.js
└── package.json


/.gitignore:
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1 | .idea
2 | *.iml
3 | 


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/LICENSE:
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 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2015 Andrey Naumenko
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 
23 | 


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/README.md:
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1 | Convexhull.js is a high-performance JavaScript 2D convex hull library.
2 | 
3 | Checkout the demo: http://indy256.github.io/convexhull-js/
4 | 
5 | ![convexhull](https://raw.githubusercontent.com/indy256/convexhull-js/gh-pages/sample.png)


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/convexhull.js:
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 1 | (function () {
 2 |     'use strict';
 3 | 
 4 |     function convexHull(points) {
 5 |         points.sort(function (a, b) {
 6 |             return a.x != b.x ? a.x - b.x : a.y - b.y;
 7 |         });
 8 | 
 9 |         var n = points.length;
10 |         var hull = [];
11 | 
12 |         for (var i = 0; i < 2 * n; i++) {
13 |             var j = i < n ? i : 2 * n - 1 - i;
14 |             while (hull.length >= 2 && removeMiddle(hull[hull.length - 2], hull[hull.length - 1], points[j]))
15 |                 hull.pop();
16 |             hull.push(points[j]);
17 |         }
18 | 
19 |         hull.pop();
20 |         return hull;
21 |     }
22 | 
23 |     function removeMiddle(a, b, c) {
24 |         var cross = (a.x - b.x) * (c.y - b.y) - (a.y - b.y) * (c.x - b.x);
25 |         var dot = (a.x - b.x) * (c.x - b.x) + (a.y - b.y) * (c.y - b.y);
26 |         return cross < 0 || cross == 0 && dot <= 0;
27 |     }
28 | 
29 |     // export as AMD module / Node module / browser or worker variable
30 |     if (typeof define === 'function' && define.amd) define(function () { return convexHull; });
31 |     else if (typeof module !== 'undefined') module.exports = convexHull;
32 |     else if (typeof self !== 'undefined') self.convexHull = convexHull;
33 |     else window.convexHull = convexHull;
34 | })();
35 | 


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/package.json:
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 1 | {
 2 |   "name": "convexhull-js",
 3 |   "version": "1.0.0",
 4 |   "description": "A high-performance JavaScript 2D convex hull library",
 5 |   "homepage": "http://indy256.github.io/convexhull-js/",
 6 |   "author": "Andrey Naumenko",
 7 |   "keywords": [
 8 |     "math",
 9 |     "geometry",
10 |     "convex hull"
11 |   ],
12 |   "repository": {
13 |     "type": "git",
14 |     "url": "git://github.com/indy256/convexhull-js.git"
15 |   },
16 |   "main": "convexhull.js",
17 |   "devDependencies": {
18 |     "benchmark": "^1.0.0",
19 |     "faucet": "0.0.1",
20 |     "jshint": "^2.6.3",
21 |     "tape": "^3.5.0"
22 |   },
23 |   "scripts": {
24 |     "test": "jshint convexhull.js | faucet"
25 |   },
26 |   "jshintConfig": {
27 |     "quotmark": "single",
28 |     "trailing": true,
29 |     "unused": true
30 |   }
31 | }
32 | 


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