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Tree: 24468babb0465dc2bc90b0765733ab6aaf3338e0

Files: 24468babb0465dc2bc90b0765733ab6aaf3338e0 / index.html

4006 bytesRaw
1<!DOCTYPE html>
2<html>
3<head>
4<title>---</title>
5<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />
6<meta charset=utf-8></head>
7<body></body>
8<script>
9(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
10var GreatCircle = require('great-circle')
11
12var pre = document.createElement('pre')
13document.body.appendChild(pre)
14
15function flatten (p) {
16  var o = {}
17  for(var k in p)
18    if(p[k] && 'object' === typeof p[k])
19      o[k] = flatten(p[k])
20    else
21      o[k] = p[k]
22  return o
23}
24
25var positions = []
26
27pre.textContent = 'waiting for position...'
28
29navigator.geolocation.watchPosition(function (e) {
30  console.log(e.coords, e.timestamp)
31  positions.push(flatten(e))
32  //keep just one minute's worth of locations.
33  if(e.timestamp < Date.now() - 60e3) // one minute
34    positions.shift()
35
36  var lat = e.coords.latitude, long = e.coords.longitude
37  var movement = positions.map(function (_e) {
38    var _lat = _e.coords.latitude, _long = _e.coords.longitude
39    return {
40      distance: GreatCircle.distance(_lat, _long, lat, long, 'NM'),
41      heading: GreatCircle.bearing(_lat, _long, lat, long)
42    }
43  })
44
45  pre.textContent = JSON.stringify({current: flatten(e), movement: movement}, null, 2)
46})
47
48
49
50
51},{"great-circle":2}],2:[function(require,module,exports){
52var GreatCircle = {
53
54    validateRadius: function(unit) {
55        var r = {'M': 6371009, 'KM': 6371.009, 'MI': 3958.761, 'NM': 3440.070, 'YD': 6967420, 'FT': 20902260};
56        if ( unit in r ) return r[unit];
57        else return unit;
58    },
59
60    distance: function(lat1, lon1, lat2, lon2, unit) {
61        if ( unit === undefined ) unit = 'KM';
62        var r = this.validateRadius(unit); 
63        lat1 *= Math.PI / 180;
64        lon1 *= Math.PI / 180;
65        lat2 *= Math.PI / 180;
66        lon2 *= Math.PI / 180;
67        var lonDelta = lon2 - lon1;
68        var a = Math.pow(Math.cos(lat2) * Math.sin(lonDelta) , 2) + Math.pow(Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1) * Math.cos(lat2) * Math.cos(lonDelta) , 2);
69        var b = Math.sin(lat1) * Math.sin(lat2) + Math.cos(lat1) * Math.cos(lat2) * Math.cos(lonDelta);
70        var angle = Math.atan2(Math.sqrt(a) , b);
71        
72        return angle * r;
73    },
74    
75    bearing: function(lat1, lon1, lat2, lon2) {
76        lat1 *= Math.PI / 180;
77        lon1 *= Math.PI / 180;
78        lat2 *= Math.PI / 180;
79        lon2 *= Math.PI / 180;
80        var lonDelta = lon2 - lon1;
81        var y = Math.sin(lonDelta) * Math.cos(lat2);
82        var x = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1) * Math.cos(lat2) * Math.cos(lonDelta);
83        var brng = Math.atan2(y, x);
84        brng = brng * (180 / Math.PI);
85        
86        if ( brng < 0 ) { brng += 360; }
87        
88        return brng;
89    },
90    
91    destination: function(lat1, lon1, brng, dt, unit) {
92        if ( unit === undefined ) unit = 'KM';
93        var r = this.validateRadius(unit);
94        lat1 *= Math.PI / 180;
95        lon1 *= Math.PI / 180;
96        var lat3 = Math.asin(Math.sin(lat1) * Math.cos(dt / r) + Math.cos(lat1) * Math.sin(dt / r) * Math.cos( brng * Math.PI / 180 ));
97        var lon3 = lon1 + Math.atan2(Math.sin( brng * Math.PI / 180 ) * Math.sin(dt / r) * Math.cos(lat1) , Math.cos(dt / r) - Math.sin(lat1) * Math.sin(lat3));
98        
99        return {
100            'LAT': lat3 * 180 / Math.PI,
101            'LON': lon3 * 180 / Math.PI
102        };
103    }
104
105}
106
107if (typeof module != 'undefined' && module.exports) {
108    module.exports = GreatCircle;
109} else {
110    window['GreatCircle'] = GreatCircle;
111}
112
113},{}]},{},[1]);
114</script>
115</html>
116

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