261 lines
7.6 KiB
JavaScript
261 lines
7.6 KiB
JavaScript
// Fisher-Yates shuffle
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function shuffle (array) {
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var i = 0,
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j = 0,
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temp = null;
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for (i = array.length - 1; i > 0; i -= 1) {
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j = Math.floor(Math.random() * (i + 1));
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temp = array[i];
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array[i] = array[j];
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array[j] = temp;
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}
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return array;
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}
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function getRandom(min, max) {
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return Math.random() * (max - min) + min;
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}
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function getNextHighestIndex(arr, value) {
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var i = arr.length;
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while (arr[--i] > value);
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return ++i;
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}
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function getUrlParameter(e) {
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return decodeURI((new RegExp(e + "=(.+?)(&|$)").exec(location.search) || [, null])[1])
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}
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//convert minutes to hour and minutes
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function formatMinutes(m){
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var hours = Math.trunc(m/60);
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var minutes = m % 60;
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return (((hours != 0) ? ('<em>' + hours + '</em> hr <em>') : '<em>') + minutes +'</em> min');
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}
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// convert celsius to farenheight
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function C2F(c){
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return Math.round( c * 9 / 5 + 32 );
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}
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// meters per second to mph
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function mps2mph(meters) {
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return Math.round( parseFloat(meters) * 2.23694 );
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}
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// array swap
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Array.prototype.swap = function(a,b){ var tmp=this[a];this[a]=this[b];this[b]=tmp;};
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function degToCompass(deg){
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val = Math.round((deg/22.5)+.5);
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arr=["N","NE","E","SE","S","SW","W","NW"];
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return arr[(val % 8)];
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}
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function distance(lat1, lon1, lat2, lon2) {
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var radlat1 = Math.PI * lat1/180,
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radlat2 = Math.PI * lat2/180,
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theta = lon1-lon2,
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radtheta = Math.PI * theta/180,
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dist = Math.sin(radlat1) * Math.sin(radlat2) + Math.cos(radlat1) * Math.cos(radlat2) * Math.cos(radtheta);
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dist = Math.acos(dist);
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dist = dist * 180/Math.PI;
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dist = dist * 60 * 1.1515;
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return dist;
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}
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function dewPoint(tem, r){
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tem = -1.0*(tem-32)*5/9 ;
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es = 6.112*Math.exp(-1.0*17.67*tem/(243.5 - tem));
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ed = r/100.0*es;
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eln = Math.log(ed/6.112);
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td = -243.5*eln/(eln - 17.67 );
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return Math.round( (td*9/5)+32 );
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}
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function heatIndex(T, R) { // T = temp, R = relative humidity
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var T2 = T*T, R2= R*R,
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c1 = -42.379, c2 = 2.04901523, c3 = 10.14333127,
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c4 = -0.22475541, c5 = -6.83783*Math.pow(10,-3), c6 = -5.481717*Math.pow(10,-2),
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c7 = 1.22874*Math.pow(10,-3), c8 = 8.5282*Math.pow(10,-4), c9 = -1.99*Math.pow(10,-6);
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return Math.round(c1 + c2*T + c3 *R + c4*T*R + c5*T2 + c6*R2 + c7*T2*R + c8*T*R2 + c9*T2*R2);
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}
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// ----------------------------------------
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// Calculate new Lat/Lng from original points
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// on a distance and bearing (angle)
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// ----------------------------------------
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let llFromDistance = function(latitude, longitude, distance, bearing) {
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// taken from: https://stackoverflow.com/a/46410871/13549
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// distance in KM, bearing in degrees
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const R = 6378.1; // Radius of the Earth
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const brng = bearing * Math.PI / 180; // Convert bearing to radian
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let lat = latitude * Math.PI / 180; // Current coords to radians
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let lon = longitude * Math.PI / 180;
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// Do the math magic
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lat = Math.asin(Math.sin(lat) * Math.cos(distance / R) + Math.cos(lat) * Math.sin(distance / R) * Math.cos(brng));
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lon += Math.atan2(Math.sin(brng) * Math.sin(distance / R) * Math.cos(lat), Math.cos(distance/R)-Math.sin(lat)*Math.sin(lat));
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// Coords back to degrees and return
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return [ (lat * 180 / Math.PI), (lon * 180 / Math.PI) ];
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}
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let pointsOnMapCircle = function(latitude, longitude, distance, numPoints) {
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const points = [];
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for (let i=0; i <= numPoints - 1; i++) {
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const bearing = Math.round((360 / numPoints) * i);
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console.log(bearing, i);
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const newPoints = llFromDistance(latitude, longitude, distance, bearing);
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points.push(newPoints);
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}
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return points;
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}
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// maps current condition code to icon
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function getCCicon(ccCode, windData){
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var icon = "images/icons/" + ( "0" + {"0":0,"1":0,"2":0,"3":47,"4":01,"5":02,"6":38,"7":03,"8":04,"9":05,"10":06,"11":08,"12":08,"13":09,"14":12,"15":11,"16":12,"17":48,"18":48,"19":16,"20":49,"21":16,"22":14,"23":0,"24":50,"25":34,"26":20,"27":21,"28":22,"29":23,"30":24,"31":25,"32":26,"33":27,"34":28,"35":13,"36":41,"37":29,"38":29,"39":30,"40":31,"41":32,"42":33,"43":34,"44":19,"45":35,"46":36,"47":37}[ccCode]).slice(-2) + ".png";
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if (parseInt(windData) >= 20) {
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if (icon === "images/icons/12.png" || icon === "images/icons/10.png" || icon === "images/icons/09.png") {
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icon = "images/icons/34.png"
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} else if (icon === "images/icons/31" || icon === "images/icons/08" || icon === "images/icons/07.png") {
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icon = "images/icons/45.png"
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}
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}
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return icon
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}
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function getWarningPosition(warning) {
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var warnpos = { "Tsunami Warning": 1,
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"Tornado Warning": 2,
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"Extreme Wind Warning": 3,
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"Severe Thunderstorm Warning": 4,
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"Flash Flood Warning": 5,
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"Flash Flood Statement": 6,
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"Severe Weather Statement": 7,
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"Fire Warning": 14,
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"Storm Surge Warning": 17,
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"Hurricane Force Wind Warning": 18,
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"Hurricane Warning": 19,
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"Typhoon Warning": 20,
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"Special Marine Warning": 21,
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"Blizzard Warning": 22,
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"Snow Squall Warning": 23,
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"Ice Storm Warning": 24,
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"Winter Storm Warning": 25,
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"High Wind Warning": 26,
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"Tropical Storm Warning": 27,
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"Storm Warning": 28,
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"Tsunami Advisory": 29,
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"Tsunami Watch": 30,
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"Avalanche Warning": 31,
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"Earthquake Warning": 32,
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"Volcano Warning": 33,
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"Ashfall Warning": 34,
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"Coastal Flood Warning": 35,
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"Lakeshore Flood Warning": 36,
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"Flood Warning": 37,
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"River Flood Warning": 37.5,
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"High Surf Warning": 38,
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"Dust Storm Warning": 39,
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"Blowing Dust Warning": 40,
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"Lake Effect Snow Warning": 41,
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"Excessive Heat Warning": 42,
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"Tornado Watch": 43,
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"Severe Thunderstorm Watch": 44,
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"Flash Flood Watch": 45,
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"Gale Warning": 46,
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"Flood Statement": 47,
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"Wind Chill Warning": 48,
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"Extreme Cold Warning": 49,
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"Hard Freeze Warning": 50,
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"Freeze Warning": 51,
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"Red Flag Warning": 52,
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"Storm Surge Watch": 53,
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"Hurricane Watch": 54,
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"Hurricane Force Wind Watch": 55,
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"Typhoon Watch": 56,
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"Tropical Storm Watch": 57,
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"Storm Watch": 58,
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"Hurricane Local Statement": 59,
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"Typhoon Local Statement": 60,
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"Tropical Storm Local Statement": 61,
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"Tropical Depression Local Statement": 62,
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"Avalanche Advisory": 63,
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"Winter Weather Advisory": 64,
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"Wind Chill Advisory": 65,
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"Heat Advisory": 66,
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"Urban and Small Stream Flood Advisory": 67,
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"Small Stream Flood Advisory": 68,
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"Arroyo and Small Stream Flood Advisory": 69,
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"Flood Advisory": 70,
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"Hydrologic Advisory": 71,
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"Lakeshore Flood Advisory": 72,
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"Coastal Flood Advisory": 73,
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"High Surf Advisory": 74,
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"Heavy Freezing Spray Warning": 75,
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"Dense Fog Advisory": 76,
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"Dense Smoke Advisory": 77,
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"Small Craft Advisory For Hazardous Seas": 78,
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"Small Craft Advisory for Rough Bar": 79,
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"Small Craft Advisory for Winds": 80,
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"Small Craft Advisory": 81,
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"Brisk Wind Advisory": 82,
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"Hazardous Seas Warning": 83,
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"Dust Advisory": 84,
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"Blowing Dust Advisory": 85,
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"Lake Wind Advisory": 86,
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"Wind Advisory": 87,
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"Frost Advisory": 88,
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"Ashfall Advisory": 89,
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"Freezing Fog Advisory": 90,
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"Freezing Spray Advisory": 91,
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"Low Water Advisory": 92,
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"Avalanche Watch": 94,
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"Blizzard Watch": 95,
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"Rip Current Statement": 96,
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"Beach Hazards Statement": 97,
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"Gale Watch": 98,
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"Winter Storm Watch": 99,
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"Hazardous Seas Watch": 100,
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"Heavy Freezing Spray Watch": 101,
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"Coastal Flood Watch": 102,
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"Lakeshore Flood Watch": 103,
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"Flood Watch": 104,
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"High Wind Watch": 105,
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"Excessive Heat Watch": 106,
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"Extreme Cold Watch": 107,
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"Wind Chill Watch": 108,
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"Lake Effect Snow Watch": 109,
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"Hard Freeze Watch": 110,
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"Freeze Watch": 111,
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"Fire Weather Watch": 112,
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"Extreme Fire Danger": 113,
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"Coastal Flood Statement": 115,
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"Lakeshore Flood Statement": 116,
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"Special Weather Statement": 117,
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"Marine Weather Statement": 118,
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"Air Quality Alert": 119,
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"Air Stagnation Advisory": 120,
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"Hazardous Weather Outlook": 121,
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}[warning]
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if (warnpos !== undefined) {
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return warnpos;
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} else {
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return 140;
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}
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}// https://date-fns.org/docs/Getting-Started
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