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virtualsky.min.js
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/*!
Virtual Sky
(c) Stuart Lowe, Las Cumbres Observatory Global Telescope
A browser planetarium using HTML5's <canvas>.
*/
(function($){
/*@cc_on
// Fix for IE's inability to handle arguments to setTimeout/setInterval
// From http://webreflection.blogspot.com/2007/06/simple-settimeout-setinterval-extra.html
(function(f){
window.setTimeout =f(window.setTimeout);
window.setInterval =f(window.setInterval);
})(function(f){return function(c,t){var a=[].slice.call(arguments,2);return f(function(){c.apply(this,a)},t)}});
@*/
function is(a,b){return typeof a===b}$.query=function(){var r={length:0};var q=location.search;if(q&&q!="#"){q=q.replace(/^\?/,"").replace(/\&$/,"");jQuery.each(q.split("&"),function(){var key=this.split("=")[0];var val=this.split("=")[1];if(/^-?[0-9.]+$/.test(val)){val=parseFloat(val)}if(val=="true"){val=true}if(val=="false"){val=false}if(/^\?[0-9\.]+$/.test(val)){val=parseFloat(val)}r[key]=val})}return r};$.extend($.fn.addTouch=function(){this.each(function(i,el){$(el).bind("touchstart touchmove touchend touchcancel touchdbltap",function(){handleTouch(event)})});var handleTouch=function(event){event.preventDefault();var simulatedEvent;var touches=event.changedTouches,first=touches[0],type="";switch(event.type){case"touchstart":type=["mousedown","click"];break;case"touchmove":type=["mousemove"];break;case"touchend":type=["mouseup"];break;case"touchdbltap":type=["dblclick"];break;default:return}for(var i=0;i<type.length;i++){simulatedEvent=document.createEvent("MouseEvent");simulatedEvent.initMouseEvent(type[i],true,true,window,1,first.screenX,first.screenY,first.clientX,first.clientY,false,false,false,false,0,null);first.target.dispatchEvent(simulatedEvent)}}});
/*! Copyright (c) 2013 Brandon Aaron (http://brandonaaron.net)
* Licensed under the MIT License (LICENSE.txt).
*
* Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers.
* Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix.
* Thanks to: Seamus Leahy for adding deltaX and deltaY
*
* Version: 3.1.3
*
* Requires: 1.2.2+
*/
(function(factory){if(typeof define==="function"&&define.amd){define(["jquery"],factory)}else{if(typeof exports==="object"){module.exports=factory}else{factory(jQuery)}}}(function($){var toFix=["wheel","mousewheel","DOMMouseScroll","MozMousePixelScroll"];var toBind="onwheel" in document||document.documentMode>=9?["wheel"]:["mousewheel","DomMouseScroll","MozMousePixelScroll"];var lowestDelta,lowestDeltaXY;if($.event.fixHooks){for(var i=toFix.length;i;){$.event.fixHooks[toFix[--i]]=$.event.mouseHooks}}$.event.special.mousewheel={setup:function(){if(this.addEventListener){for(var i=toBind.length;i;){this.addEventListener(toBind[--i],handler,false)}}else{this.onmousewheel=handler}},teardown:function(){if(this.removeEventListener){for(var i=toBind.length;i;){this.removeEventListener(toBind[--i],handler,false)}}else{this.onmousewheel=null}}};$.fn.extend({mousewheel:function(fn){return fn?this.bind("mousewheel",fn):this.trigger("mousewheel")},unmousewheel:function(fn){return this.unbind("mousewheel",fn)}});function handler(event){var orgEvent=event||window.event,args=[].slice.call(arguments,1),delta=0,deltaX=0,deltaY=0,absDelta=0,absDeltaXY=0,fn;event=$.event.fix(orgEvent);event.type="mousewheel";if(orgEvent.wheelDelta){delta=orgEvent.wheelDelta}if(orgEvent.detail){delta=orgEvent.detail*-1}if(orgEvent.deltaY){deltaY=orgEvent.deltaY*-1;delta=deltaY}if(orgEvent.deltaX){deltaX=orgEvent.deltaX;delta=deltaX*-1}if(orgEvent.wheelDeltaY!==undefined){deltaY=orgEvent.wheelDeltaY}if(orgEvent.wheelDeltaX!==undefined){deltaX=orgEvent.wheelDeltaX*-1}absDelta=Math.abs(delta);if(!lowestDelta||absDelta<lowestDelta){lowestDelta=absDelta}absDeltaXY=Math.max(Math.abs(deltaY),Math.abs(deltaX));if(!lowestDeltaXY||absDeltaXY<lowestDeltaXY){lowestDeltaXY=absDeltaXY}fn=delta>0?"floor":"ceil";delta=Math[fn](delta/lowestDelta);deltaX=Math[fn](deltaX/lowestDeltaXY);deltaY=Math[fn](deltaY/lowestDeltaXY);args.unshift(event,delta,deltaX,deltaY);return($.event.dispatch||$.event.handle).apply(this,args)}}));
/*! VirtualSky */
function VirtualSky(input){this.version="0.6.7";this.ie=false;this.excanvas=(typeof G_vmlCanvasManager!="undefined")?true:false;
/*@cc_on
this.ie = true
@*/
this.q=$.query();this.dir=$("script[src*=virtualsky]").attr("src").match(/^.*\//);this.dir=this.dir&&this.dir[0]||"";this.langurl=this.dir+"lang/%LANG%.json";this.id="";this.gradient=true;this.magnitude=5;this.background="rgba(0,0,0,0)";this.color="";this.wide=0;this.tall=0;this.d2r=Math.PI/180;this.r2d=180/Math.PI;this.setLongitude(-119.86286);this.setLatitude(34.4326);this.spin=false;this.cardinalpoints=true;this.constellation={lines:false,boundaries:false,labels:false};this.meteorshowers=false;this.negative=false;this.showgalaxy=false;this.showstars=true;this.showstarlabels=false;this.showplanets=true;this.showplanetlabels=true;this.showorbits=false;this.showdate=true;this.showposition=true;this.scalestars=1;this.ground=false;this.grid={az:false,eq:false,gal:false,step:30};this.ecliptic=false;this.meridian=false;this.keyboard=true;this.mouse=true;this.islive=false;this.fullscreen=false;this.transparent=false;this.fps=10;this.credit=(location.host=="lco.global"&&location.href.indexOf("/embed")<0)?false:true;this.callback={geo:"",mouseenter:"",mouseout:""};this.keys=new Array();this.base="";this.az_step=0;this.az_off=0;this.ra_off=0;this.dc_off=0;this.fov=30;this.plugins=[];this.calendarevents=[];this.events={};this.projections={polar:{title:"Polar projection",azel2xy:function(az,el,w,h){var radius=h/2;var r=radius*((Math.PI/2)-el)/(Math.PI/2);return{x:(w/2-r*Math.sin(az)),y:(radius-r*Math.cos(az)),el:el}},polartype:true,atmos:true},fisheye:{title:"Fisheye polar projection",azel2xy:function(az,el,w,h){var radius=h/2;var r=radius*Math.sin(((Math.PI/2)-el)/2)/0.70710678;return{x:(w/2-r*Math.sin(az)),y:(radius-r*Math.cos(az)),el:el}},polartype:true,atmos:true},ortho:{title:"Orthographic polar projection",azel2xy:function(az,el,w,h){var radius=h/2;var r=radius*Math.cos(el);return{x:(w/2-r*Math.sin(az)),y:(radius-r*Math.cos(az)),el:el}},polartype:true,atmos:true},stereo:{title:"Stereographic projection",azel2xy:function(az,el,w,h){var f=0.42;var sinel1=0;var cosel1=1;var cosaz=Math.cos((az-Math.PI));var sinaz=Math.sin((az-Math.PI));var sinel=Math.sin(el);var cosel=Math.cos(el);var k=2/(1+sinel1*sinel+cosel1*cosel*cosaz);return{x:(w/2+f*k*h*cosel*sinaz),y:(h-f*k*h*(cosel1*sinel-sinel1*cosel*cosaz)),el:el}},atmos:true},lambert:{title:"Lambert projection",azel2xy:function(az,el,w,h){var cosaz=Math.cos((az-Math.PI));var sinaz=Math.sin((az-Math.PI));var sinel=Math.sin(el);var cosel=Math.cos(el);var k=Math.sqrt(2/(1+cosel*cosaz));return{x:(w/2+0.6*h*k*cosel*sinaz),y:(h-0.6*h*k*(sinel)),el:el}},atmos:true},gnomic:{title:"Gnomic projection",azel2xy:function(az,el){if(el>=0){var pos=this.azel2radec(az,el);return this.radec2xy(pos.ra*this.d2r,pos.dec*this.d2r,[el,az])}else{return{x:-1,y:-1,el:el}}},radec2xy:function(ra,dec,coords){var fov,cd,cd0,sd,sd0,dA,A,F,scale,twopi;if(Math.abs(dec-this.dc_off)>this.maxangle){return{x:-1,y:-1,el:-1}}var ang=this.greatCircle(this.ra_off,this.dc_off,ra,dec);if(ang>this.maxangle){return{x:-1,y:-1,el:-1}}if(!coords){coords=this.coord2horizon(ra,dec)}if(this.ground&&coords[0]<-0.000001){return{x:-1,y:-1,el:coords[0]*this.r2d}}scale=this.tall/this.fov;cd=Math.cos(dec);cd0=Math.cos(this.dc_off);sd=Math.sin(dec);sd0=Math.sin(this.dc_off);dA=ra-this.ra_off;dA=inrangeAz(dA);A=cd*Math.cos(dA);F=scale*this.r2d/(sd0*sd+A*cd0);return{x:(this.wide/2)-F*cd*Math.sin(dA),y:(this.tall/2)-F*(cd0*sd-A*sd0),el:coords[0]*this.r2d}},draw:function(){if(!this.transparent){this.ctx.fillStyle=(this.hasGradient())?"rgba(0,15,30, 1)":((this.negative)?this.col.white:this.col.black);this.ctx.fillRect(0,0,this.wide,this.tall);this.ctx.fill()}},isVisible:function(el){return true},atmos:false,fullsky:true},equirectangular:{title:"Equirectangular projection",azel2xy:function(az,el,w,h){while(az<0){az+=2*Math.PI}az=(az)%(Math.PI*2);return{x:(((az-Math.PI)/(Math.PI/2))*h+w/2),y:(h-(el/(Math.PI/2))*h),el:el}},maxb:90,atmos:true},mollweide:{title:"Mollweide projection",radec2xy:function(ra,dec){var dtheta,x,y,coords,sign,outside,normra;var thetap=Math.abs(dec);var pisindec=Math.PI*Math.sin(Math.abs(dec));for(var i=0;i<20;i++){dtheta=-(thetap+Math.sin(thetap)-pisindec)/(1+Math.cos(thetap));thetap+=dtheta;if(dtheta<0.0001){break}}normra=(ra+this.d2r*this.az_off)%(2*Math.PI)-Math.PI;outside=false;x=-(2/Math.PI)*(normra)*Math.cos(thetap/2)*this.tall/2+this.wide/2;if(x>this.wide){outside=true}sign=(dec>=0)?1:-1;y=-sign*Math.sin(thetap/2)*this.tall/2+this.tall/2;coords=this.coord2horizon(ra,dec);return{x:(outside?-100:x%this.wide),y:y,el:coords[0]*this.r2d}},draw:function(){var c=this.ctx;c.moveTo(this.wide/2,this.tall/2);c.beginPath();var x=this.wide/2-this.tall;var y=0;var w=this.tall*2;var h=this.tall;var kappa=0.5522848;var ox=(w/2)*kappa;var oy=(h/2)*kappa;var xe=x+w;var ye=y+h;var xm=x+w/2;var ym=y+h/2;c.moveTo(x,ym);c.bezierCurveTo(x,ym-oy,xm-ox,y,xm,y);c.bezierCurveTo(xm+ox,y,xe,ym-oy,xe,ym);c.bezierCurveTo(xe,ym+oy,xm+ox,ye,xm,ye);c.bezierCurveTo(xm-ox,ye,x,ym+oy,x,ym);c.closePath();if(!this.transparent){c.fillStyle=(this.hasGradient())?"rgba(0,15,30, 1)":((this.negative)?this.col.white:this.col.black);c.fill()}},altlabeltext:true,fullsky:true,atmos:false},planechart:{title:"Planechart projection",radec2xy:function(ra,dec){ra=inrangeAz(ra);var normra=(ra+this.d2r*this.az_off)%(2*Math.PI)-Math.PI;var x=-(normra/(2*Math.PI))*this.tall*2+this.wide/2;var y=-(dec/Math.PI)*this.tall+this.tall/2;var coords=this.coord2horizon(ra,dec);return{x:x,y:y,el:coords[0]*this.r2d}},draw:function(){if(!this.transparent){this.ctx.fillStyle=(this.hasGradient())?"rgba(0,15,30, 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Date());this.fullsky=false;this.colours={normal:{txt:"rgb(255,255,255)",black:"rgb(0,0,0)",white:"rgb(255,255,255)",grey:"rgb(100,100,100)",stars:"rgb(255,255,255)",sun:"rgb(255,215,0)",moon:"rgb(150,150,150)",cardinal:"rgba(163,228,255, 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fromqs=(typeof this.q.lang==="string"||typeof this.setlang==="string");this.langs={ar:{language:{name:"العربية",alignment:"right"}},cs:{language:{name:"Čeština",alignment:"left"}},en:{language:{name:"English",alignment:"left"}},es:{language:{name:"Español",alignment:"left"}},fr:{language:{name:"Français",alignment:"left"}},it:{language:{name:"Italiano",alignment:"left"}},pt:{language:{name:"Português",alignment:"left"}},};this.lang=this.langs.en;if(typeof this.polartype=="undefined"){this.selectProjection("polar")}this.updateColours();this.loadLanguage(this.language,"",fromqs);var v,a,b,r,s,p,k,c;v=".virtualsky";a="#f0f0f0";b="#fcfcfc";k="background";c=k+"-color";p="padding";bs="box-shadow:0px 0px 20px rgba(255,255,255,0.5);";function br(i){return"border-radius:"+i+";-moz-border-radius:"+i+";-webkit-border-radius:"+i+";"}r=br("0.5em");s=br("3px");$('<style type="text/css">'+v+"_help { "+p+":10px;"+c+":white;"+r+"} "+v+"_help ul { list-style:none;margin:0px;"+p+":0px; } "+v+"_infobox { 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#e0e0e0;border-bottom-width:2px;white-space:nowrap;font-family:monospace;"+p+":1px 6px;font-size:1.1em;}</style>").appendTo("head");this.pointers=[];this.dragging=false;this.x="";this.y="";this.theta=0;this.skygrad;this.infobox="virtualsky_infobox";this.container="";this.times=this.astronomicalTimes();if(this.id){this.createSky()}p=this.moonPos(this.times.JD);this.moon=p.moon;this.sun=p.sun;if(this.islive){interval=window.setInterval(function(sky){sky.setClock("now")},1000,this)}return this}VirtualSky.prototype.init=function(d){if(!d){return this}var q=location.search;if(q&&q!="#"){var bits=q.replace(/^\?|\&$/g,"").split("&");var key,val;for(var i=0;i<bits.length;i++){key=bits[i].split("=")[0],val=bits[i].split("=")[1];if(/^-?[0-9.]+$/.test(val)){val=parseFloat(val)}if(val=="true"){val=true}if(val=="false"){val=false}if(d[key]===undefined){d[key]=val}}}var n="number";var s="string";var b="boolean";var o="object";var f="function";var pairs={id:s,gradient:b,cardinalpoints:b,negative:b,meteorshowers:b,showstars:b,scalestars:n,showstarlabels:b,starnames:o,showplanets:b,showplanetlabels:b,showorbits:b,showgalaxy:b,showdate:b,showposition:b,keyboard:b,mouse:b,ground:b,ecliptic:b,meridian:b,magnitude:n,clock:o,background:s,color:s,fov:n,objects:s,base:s,fullscreen:b,credit:b,transparent:b,plugins:o,lang:s};for(key in pairs){if(is(d[key],pairs[key])){this[key]=d[key]}}if(is(d.projection,s)){this.selectProjection(d.projection)}if(is(d.constellations,b)){this.constellation.lines=d.constellations}if(is(d.constellationboundaries,b)){this.constellation.boundaries=d.constellationboundaries}if(is(d.constellationlabels,b)){this.constellation.labels=d.constellationlabels}if(is(d.gridlines_az,b)){this.grid.az=d.gridlines_az}if(is(d.gridlines_eq,b)){this.grid.eq=d.gridlines_eq}if(is(d.gridlines_gal,b)){this.grid.gal=d.gridlines_gal}if(is(d.gridstep,n)){this.grid.step=d.gridstep}if(is(d.longitude,n)){this.setLongitude(d.longitude)}if(is(d.latitude,n)){this.setLatitude(d.latitude)}if(is(d.clock,s)){this.updateClock(new Date(d.clock.replace(/%20/g," ")))}if(is(d.az,n)){this.az_off=(d.az%360)-180}if(is(d.ra,n)){this.setRA(d.ra)}if(is(d.dec,n)){this.setDec(d.dec)}if(is(d.planets,s)){this.file.planets=d.planets}if(is(d.planets,o)){this.planets=d.planets}if(is(d.lines,s)){this.file.lines=d.lines}if(is(d.lines,o)){this.lines=d.lines}if(is(d.boundaries,s)){this.file.boundaries=d.boundaries}if(is(d.boundaries,o)){this.boundaries=d.boundaries}if(is(d.width,n)){this.wide=d.width}if(is(d.height,n)){this.tall=d.height}if(is(d.live,b)){this.islive=d.live}if(is(d.lang,s)&&d.lang.length==2){this.language=d.lang}if(is(d.fontfamily,s)){this.fntfam=d.fontfamily.replace(/%20/g," ")}if(is(d.fontsize,s)){this.fntsze=d.fontsize}if(is(d.lang,s)){this.setlang=d.lang}if(is(d.callback,o)){if(is(d.callback.geo,f)){this.callback.geo=d.callback.geo}if(is(d.callback.mouseenter,f)){this.callback.mouseenter=d.callback.mouseenter}if(is(d.callback.mouseout,f)){this.callback.mouseout=d.callback.mouseout}}return this};VirtualSky.prototype.loadLanguage=function(l,fn,fromquerystring){l=l||this.language;var lang="";if(this.langs[l]){lang=l}if(!lang){l=(l.indexOf("-")>0?l.substring(0,l.indexOf("-")):l.substring(0,2));if(fromquerystring){lang=l}else{if(this.langs[l]){lang=l}}}l=lang;if(!l){l="en"}var url=this.langurl.replace("%LANG%",l);this.loadJSON(url,function(data){this.langcode=l;this.langs[l]=data;this.langs[l].loaded=true;if(data.starnames){for(var n in data.starnames){this.starnames[n]=data.starnames[n]}}this.changeLanguage(l);if(typeof fn==="function"){fn.call(this)}},function(data){},function(e){this.loadLanguage("en",fn)});return this};VirtualSky.prototype.changeLanguage=function(code,fn){if(this.langs[code]){if(!this.langs[code].loaded){this.loadLanguage(code,fn)}else{this.lang=this.langs[code];this.langcode=code;this.draw();if(typeof fn==="function"){fn.call(this)}}return this}this.lang=this.langs.en;return this};VirtualSky.prototype.htmlDecode=function(input){if(!input){return""}var e=document.createElement("div");e.innerHTML=input;return e.childNodes[0].nodeValue};VirtualSky.prototype.getPhrase=function(key,key2){if(key===undefined){return undefined}if(key==="constellations"){if(key2&&is(this.lang.constellations[key2],"string")){return this.htmlDecode(this.lang.constellations[key2])}}else{if(key==="planets"){if(this.lang.planets&&this.lang.planets[key2]){return this.htmlDecode(this.lang.planets[key2])}else{return this.htmlDecode(this.lang[key2])}}else{return this.htmlDecode(this.lang[key])||this.htmlDecode(this.langs.en[key])||""}}};VirtualSky.prototype.resize=function(w,h){if(!this.canvas){return}if(!w||!h){if(this.fullscreen){this.canvas.css({width:0,height:0});w=$(window).width();h=$(window).height();this.canvas.css({width:w,height:h});$(document).css({width:w,height:h})}else{this.canvas.css({width:0,height:0});w=this.container.outerWidth();h=this.container.outerHeight();this.canvas.css({width:w,height:h})}}if(w==this.wide&&h==this.tall){return}this.setWH(w,h);this.positionCredit();this.updateSkyGradient();this.draw()};VirtualSky.prototype.setWH=function(w,h){if(!w||!h){return}this.c.width=w;this.c.height=h;this.wide=w;this.tall=h;this.changeFOV();if(this.ie&&$.browser.version==8){$("#"+this.idinner).find("div").css({width:w,height:h})}this.canvas.css({width:w,height:h})};VirtualSky.prototype.changeFOV=function(delta){var fov=this.fov;if(delta>0){fov/=1.2}else{if(delta<0){fov*=1.2}}return this.setFOV(fov)};VirtualSky.prototype.setFOV=function(fov){if(fov>60||typeof fov!=="number"){this.fov=60}else{if(fov<1){this.fov=1}else{this.fov=fov}}this.maxangle=this.d2r*this.fov*Math.max(this.wide,this.tall)/this.tall;this.maxangle=Math.min(this.maxangle,Math.PI/2);return this};VirtualSky.prototype.hide=function(){this.container.hide();return this};VirtualSky.prototype.show=function(){this.container.show();return this};VirtualSky.prototype.toggle=function(){this.container.toggle();return this};VirtualSky.prototype.convertStarsToRadians=function(stars){for(var i=0;i<stars.length;i++){stars[i][2]*=this.d2r;stars[i][3]*=this.d2r}return stars};VirtualSky.prototype.load=function(t,file,fn){return this.loadJSON(file,function(data){if(t=="stars"){this.starsdeep=true;this.stars=this.stars.concat(this.convertStarsToRadians(data.stars))}else{this[t]=data[t]}this.draw();this.trigger("loaded"+(t.charAt(0).toUpperCase()+t.slice(1)),{data:data})},fn)};VirtualSky.prototype.loadJSON=function(file,callback,complete,error){if(typeof file!=="string"){return this}var dt=file.match(/\.json$/i)?"json":"script";if(dt=="script"){var tmp=callback;callback=function(data){for(var i=0;i<this.plugins.length;++i){if(typeof this.plugins[i].init=="function"){this.plugins[i].init.call(this)}}tmp.call(this,data)}}var config={dataType:dt,url:this.base+file,context:this,success:callback,complete:complete||function(){},error:error||function(){}};if(dt=="json"){config.jsonp="onJSONPLoad"}if(dt=="script"){config.cache=true}$.ajax(config);return this};VirtualSky.prototype.createSky=function(){this.container=$("#"+this.id);this.container.addTouch();this.times=this.astronomicalTimes();if(this.fntfam){this.container.css({"font-family":this.fntfam})}if(this.fntsze){this.container.css({"font-size":this.fntsze})}if(this.container.length==0){$("body").append('<div id="'+this.id+'"></div>');this.container=$("#"+this.id)}this.container.css("position","relative");$(window).resize({me:this},function(e){e.data.me.resize()});if(!this.planets){this.load("planets",this.file.planets)}if(!this.lines){this.load("lines",this.file.lines)}if(!this.boundaries){this.load("boundaries",this.file.boundaries)}if(!this.showers){this.load("showers",this.file.showers)}if(!this.galaxy){this.load("galaxy",this.file.galaxy)}this.changeMagnitude(0);if(this.objects){var ob=this.objects.split(";");for(var o=0;o<ob.length;o++){ob[o]=((ob[o].search(/\.json$/)>=0)?{url:ob[o],src:"file",type:"json"}:{url:"http://www.strudel.org.uk/lookUP/json/?name="+ob[o],src:"lookup",type:"jsonp"})}var lookups=0;var ok=true;for(var o=0;o<ob.length;o++){if(ob[o].src=="lookup"){lookups++}if(lookups>5){ok=false}if(ok||ob[o].src!="lookup"){$.ajax({dataType:ob[o].type,url:ob[o].url,context:this,success:function(data){if(typeof data.length==="undefined"){data=[data]}for(var i=0;i<data.length;i++){if(data[i]&&data[i].dec&&data[i].ra){this.addPointer({ra:data[i].ra.decimal,dec:data[i].dec.decimal,label:data[i].target.name,colour:this.col.pointers})}this.draw()}}})}}}if(this.wide>0){this.container.css("width",this.wide)}this.wide=this.container.width();if(this.tall>0){this.container.css("height",this.tall)}this.tall=this.container.height();this.idinner=this.id+"_inner";this.container.html('<canvas id="'+this.idinner+'" style="display:block;"></canvas>');this.canvas=$("#"+this.idinner);this.c=document.getElementById(this.idinner);if(this.excanvas){this.c=G_vmlCanvasManager.initElement(this.c)}if(this.c&&this.c.getContext){this.setWH(this.wide,this.tall);var ctx=this.ctx=this.c.getContext("2d");ctx.clearRect(0,0,this.wide,this.tall);ctx.beginPath();var fs=this.fontsize();ctx.font=fs+"px Helvetica";ctx.fillStyle="rgb(0,0,0)";ctx.lineWidth=1.5;var loading="Loading sky...";ctx.fillText(loading,(ctx.wide-ctx.measureText(loading).width)/2,(this.tall-fs)/2);ctx.fill();$("#"+this.idinner).on("click",{sky:this},function(e){var x=e.pageX-$(this).offset().left-window.scrollX;var y=e.pageY-$(this).offset().top-window.scrollY;matched=e.data.sky.whichPointer(x,y);e.data.sky.toggleInfoBox(matched);if(matched>=0){$(e.data.sky.canvas).css({cursor:"pointer"})}}).on("mousemove",{sky:this},function(e){var s=e.data.sky;var x=e.pageX-$(this).offset().left;var y=e.pageY-$(this).offset().top;var theta,f,dr;if(s.mouse){$(s.canvas).css({cursor:"move"})}if(s.dragging&&s.mouse){if(s.polartype){theta=Math.atan2(y-s.tall/2,x-s.wide/2);if(!s.theta){s.theta=theta}s.az_off-=(s.theta-theta)*s.r2d;s.theta=theta}else{if(s.projection.id=="gnomic"){f=0.0015*(s.fov*s.d2r);dr=0;if(typeof s.x=="number"){dr=Math.min(Math.abs(s.x-x)*f/(Math.cos(s.dc_off)),Math.PI/36)}if(typeof s.y=="number"){s.dc_off-=(s.y-y)*f}s.ra_off-=(s.x-x>0?1:-1)*dr;s.dc_off=inrangeEl(s.dc_off)}else{if(typeof s.x=="number"){s.az_off+=(s.x-x)/4}}}s.az_off=s.az_off%360;s.x=x;s.y=y;s.draw();$(s.canvas).css({cursor:"-moz-grabbing"})}else{matched=s.whichPointer(x,y);s.toggleInfoBox(matched)}}).on("mousedown",{sky:this},function(e){e.data.sky.dragging=true}).on("mouseup",{sky:this},function(e){var s=e.data.sky;s.dragging=false;s.x="";s.y="";s.theta=""}).on("mouseout",{sky:this},function(e){var s=e.data.sky;s.dragging=false;s.mouseover=false;s.x="";s.y="";if(typeof s.callback.mouseout=="function"){s.callback.mouseout.call(s)}}).on("mouseenter",{sky:this},function(e){var s=e.data.sky;s.mouseover=true;if(typeof s.callback.mouseenter=="function"){s.callback.mouseenter.call(s)}}).on("mousewheel",{sky:this},function(e,delta){var s=e.data.sky;if(s.mouse&&s.projection.id=="gnomic"){s.changeFOV(delta).draw();return false}else{return true}});$(document).bind("keypress",{sky:this},function(e){if(!e){e=window.event}var code=e.keyCode||e.charCode||e.which||0;e.data.sky.keypress(code,e)})}this.registerKey("a",function(){this.toggleAtmosphere()},"atmos");this.registerKey("g",function(){this.toggleGround()},"ground");this.registerKey("h",function(){this.cycleProjection()},"projection");this.registerKey("i",function(){this.toggleNegative()},"neg");this.registerKey(",",function(){this.toggleEcliptic()},"ec");this.registerKey(";",function(){this.toggleMeridian()},"meridian");this.registerKey("e",function(){this.toggleGridlinesEquatorial()},"eq");this.registerKey("z",function(){this.toggleGridlinesAzimuthal()},"az");this.registerKey("m",function(){this.toggleGridlinesGalactic()},"gal");this.registerKey("M",function(){this.toggleGalaxy()},"galaxy");this.registerKey("q",function(){this.toggleCardinalPoints()},"cardinal");this.registerKey("s",function(){this.toggleStars()},"stars");this.registerKey("S",function(){this.toggleStarLabels()},"starlabels");this.registerKey("u",function(){this.togglePlanetLabels()},"sollabels");this.registerKey("p",function(){this.togglePlanetHints()},"sol");this.registerKey("o",function(){this.toggleOrbits()},"orbits");this.registerKey("c",function(){this.toggleConstellationLines()},"con");this.registerKey("v",function(){this.toggleConstellationLabels()},"names");this.registerKey("b",function(){this.toggleConstellationBoundaries()},"conbound");this.registerKey("R",function(){this.toggleMeteorShowers()},"meteorshowers");this.registerKey("1",function(){this.toggleHelp()});this.registerKey("8",function(){this.setClock("now").calendarUpdate()},"reset");this.registerKey("j",function(){if(!this.islive){this.spinIt("down")}},"slow");this.registerKey("k",function(){this.spinIt(0)},"stop");this.registerKey("l",function(){if(!this.islive){this.spinIt("up")}},"fast");this.registerKey("-",function(){this.setClock(-86400).calendarUpdate()},"subtractday");this.registerKey("=",function(){this.setClock(86400).calendarUpdate()},"addday");this.registerKey("[",function(){this.setClock(-86400*7).calendarUpdate()},"subtractweek");this.registerKey("]",function(){this.setClock(86400*7).calendarUpdate()},"addweek");this.registerKey(37,function(){this.az_off-=2;this.draw()},"azleft");this.registerKey(39,function(){this.az_off+=2;this.draw()},"azright");this.registerKey(38,function(){this.changeMagnitude(0.25)},"magup");this.registerKey(40,function(){this.changeMagnitude(-0.25)},"magdown");this.registerKey(63,function(){this.toggleHelp()});this.draw()};VirtualSky.prototype.changeMagnitude=function(m){if(typeof m!=="number"){return this}this.magnitude+=m;if(!this.starsdeep&&this.magnitude>4){this.load("stars",this.file.stars)}else{this.draw()}return this};VirtualSky.prototype.toggleHelp=function(){var v="virtualsky";if($("."+v+"_dismiss").length>0){$("."+v+"_dismiss").trigger("click")}else{var o="";for(var i=0;i<this.keys.length;i++){if(this.keys[i].txt){o+='<li><strong class="'+v+"_help_key "+v+"_"+this.keys[i].txt+'">'+this.keys[i].str+'</strong> → <a href="#" class="'+v+"_"+this.keys[i].txt+'" style="text-decoration:none;">'+this.getPhrase(this.keys[i].txt)+"</a></li>"}}$('<div class="'+v+'_help"><div class="'+v+'_dismiss" title="'+this.getPhrase("close")+'">×</div><span>'+this.getPhrase("keyboard")+'</span><div class="'+v+'_helpinner"><ul></ul></div></div>').appendTo(this.container);var hlp=$("."+v+"_help");var h=hlp.outerHeight();hlp.find("ul").html(o);$("."+v+"_helpinner").css({overflow:"auto","max-height":(this.tall-h)+"px"});for(var i=0;i<this.keys.length;i++){if(this.keys[i].txt){$("."+v+"_"+this.keys[i].txt).on("click",{fn:this.keys[i].fn,me:this},function(e){e.preventDefault();e.data.fn.call(e.data.me)})}}this.lightbox($("."+v+"_help"));$("."+v+"_help, ."+v+"_bg").on("mouseout",{sky:this},function(e){e.data.sky.mouseover=false}).on("mouseenter",{sky:this},function(e){e.data.sky.mouseover=true})}};VirtualSky.prototype.registerKey=function(charCode,fn,txt){if(!is(fn,"function")){return this}if(!is(charCode,"object")){charCode=[charCode]}var aok,ch,c,i,alt,str;for(c=0;c<charCode.length;c++){alt=false;if(typeof charCode[c]=="string"){if(charCode[c].indexOf("alt")==0){str=charCode[c];alt=true;charCode[c]=charCode[c].substring(4)}else{str=charCode[c]}ch=charCode[c].charCodeAt(0)}else{ch=charCode[c];var arrows={37:"left",38:"up",39:"right",40:"down"};str=this.getPhrase(arrows[ch])||String.fromCharCode(ch)}aok=true;for(i=0;i<this.keys.length;i++){if(this.keys.charCode==ch&&this.keys.altKey==alt){aok=false}}if(aok){this.keys.push({str:str,charCode:ch,"char":String.fromCharCode(ch),fn:fn,txt:txt,altKey:alt})}}return this};VirtualSky.prototype.keypress=function(charCode,event){if(!event){event={altKey:false}}if(this.mouseover&&this.keyboard){for(var i=0;i<this.keys.length;i++){if(this.keys[i].charCode==charCode&&event.altKey==this.keys[i].altKey){this.keys[i].fn.call(this,{event:event});break}}}};VirtualSky.prototype.whichPointer=function(x,y){for(var i=0;i<this.pointers.length;i++){if(Math.abs(x-this.pointers[i].x)<5&&Math.abs(y-this.pointers[i].y)<5){return i}}return -1};VirtualSky.prototype.toggleInfoBox=function(i){if(this.pointers.length==0||i>=this.pointers.length||(i>=0&&!this.pointers[i].html)){return this}if($("#"+this.id+"_"+this.infobox).length<=0){this.container.append('<div id="'+this.id+"_"+this.infobox+'" class="'+this.infobox+'" style="display:none;"></div>')}var el=$("#"+this.id+"_"+this.infobox);if(i>=0&&this.isVisible(this.pointers[i].el)&&this.pointers[i].x>0&&this.pointers[i].y>0&&this.pointers[i].x<this.wide&&this.pointers[i].y<this.tall){var offset=this.container.position();el.html(this.pointers[i].html);var x=this.pointers[i].x-Math.round(el.outerWidth()/2);var y=this.pointers[i].y-Math.round(el.outerHeight()/2);el.css({position:"absolute",left:x,top:y,"z-index":10}).fadeIn("fast")}else{el.hide()}};VirtualSky.prototype.coord2horizon=function(ra,dec){var ha,alt,az,sd,sl,cl;ha=(Math.PI*this.times.LST/12)-ra;sd=Math.sin(dec);sl=Math.sin(this.latitude);cl=Math.cos(this.latitude);alt=Math.asin(sd*sl+Math.cos(dec)*cl*Math.cos(ha));az=Math.acos((sd-Math.sin(alt)*sl)/(Math.cos(alt)*cl));if(Math.sin(ha)>0){az=2*Math.PI-az}return[alt,az]};function inrangeAz(a,deg){if(deg){while(a<0){a+=360}while(a>360){a-=360}}else{var twopi=(2*Math.PI);while(a<0){a+=twopi}while(a>twopi){a-=twopi}}return a}function inrangeEl(a,deg){if(deg){if(a>=90){a=89.99999}if(a<=-90){a=-89.99999}}else{if(a>=Math.PI/2){a=(Math.PI/2)*0.999999}if(a<=-Math.PI/2){a=(-Math.PI/2)*0.999999}}return a}VirtualSky.prototype.selectProjection=function(proj){if(this.projections[proj]){this.projection=this.projections[proj];this.projection.id=proj;this.fullsky=this.projection.fullsky==true;this.polartype=this.projection.polartype==true;if(typeof this.projection.azel2xy==="function"){this.azel2xy=this.projection.azel2xy}else{this.azel2xy=function(az,el,w,h){if(!w){w=this.wide}if(!h){h=this.tall}if(az<0){az+=360}return{x:-1,y:-1,el:-1}}}if(typeof this.projection.azel2radec==="function"){this.azel2radec=this.projection.azel2radec}else{this.azel2radec=function(az,el){var xt,yt,r,l;l=this.latitude;xt=Math.asin(Math.sin(el)*Math.sin(l)+Math.cos(el)*Math.cos(l)*Math.cos(az));r=(Math.sin(el)-Math.sin(l)*Math.sin(xt))/(Math.cos(l)*Math.cos(xt));if(r>1){r=1}yt=Math.acos(r);if(Math.sin(az)>0){yt=Math.PI*2-yt}xt*=this.r2d;yt*=this.r2d;yt=(this.times.LST*15-yt+360)%360;return{ra:yt,dec:xt}}}if(this.ctx){this.updateSkyGradient()}this.updateColours();if(this.container){var w=this.container.width();var h=this.container.height();var s=(this.lang.projections&&this.lang.projections[proj])?this.lang.projections[proj]:this.projections[proj].title;if($("."+this.id+"_projection").length>0){$("."+this.id+"_projection").remove()}this.container.append('<div class="'+this.id+'_projection">'+s+"</div>");$("."+this.id+"_projection").on("mouseover",{me:this},function(e){e.data.me.mouseover=true}).css({position:"absolute",padding:0,width:w+"px",top:0,left:0,"text-align":"center","line-height":h+"px",zIndex:20,fontSize:"1.5em",display:"block",overflow:"hidden",backgroundColor:"transparent",color:(this.negative?this.col.black:this.col.white)}).delay(500).fadeOut(1000,function(){$(this).remove()})}}};VirtualSky.prototype.cycleProjection=function(){var usenext=false;var proj=this.projection.id;var i=0;var firstkey;for(var key in this.projections){if(i==0){firstkey=key}if(usenext){proj=key;break}if(key==this.projection.id){usenext=true}i++}if(proj==this.projection.id){proj=firstkey}this.draw(proj)};VirtualSky.prototype.updateColours=function(){this.col=$.extend(true,{},((this.negative)?this.colours.negative:this.colours.normal));if(this.color==""){if((this.polartype||this.projection.altlabeltext)){this.col.txt=this.col.grey}}else{this.col.txt=this.color}};VirtualSky.prototype.isVisible=function(el){if(typeof this.projection.isVisible==="function"){return this.projection.isVisible.call(el)}if(!this.fullsky){return(el>0)}else{return(this.ground)?(el>0):true}};VirtualSky.prototype.isPointBad=function(p){return p.x==-1&&p.y==-1};VirtualSky.prototype.astronomicalTimes=function(clock,lon){clock=clock||this.clock;lon=lon||this.longitude*this.r2d;var JD,JD0,S,T,T0,UT,A,GST,d,LST;JD=this.getJD(clock);JD0=Math.floor(JD-0.5)+0.5;S=JD0-2451545;T=S/36525;T0=(6.697374558+(2400.051336*T)+(0.000025862*T*T))%24;if(T0<0){T0+=24}UT=(((clock.getUTCMilliseconds()/1000+clock.getUTCSeconds())/60)+clock.getUTCMinutes())/60+clock.getUTCHours();A=UT*1.002737909;T0+=A;GST=T0%24;if(GST<0){GST+=24}d=(GST+lon/15)/24;d=d-Math.floor(d);if(d<0){d+=1}LST=24*d;return{GST:GST,LST:LST,JD:JD}};VirtualSky.prototype.moonPos=function(JD,sun){var d2r,JD,sun,lo,Po,No,i,e,l,Mm,N,C,Ev,sinMo,Ae,A3,Mprimem,Ec,A4,lprime,V,lprimeprime,Nprime,lppNp,sinlppNp,y,x,lm,Bm;d2r=this.d2r;JD=JD||this.times.JD;sun=sun||this.sunPos(JD);lo=91.929336;Po=130.143076;No=291.682547;i=5.145396;e=0.0549;l=(13.1763966*sun.D+lo)%360;if(l<0){l+=360}Mm=(l-0.1114041*sun.D-Po)%360;if(Mm<0){Mm+=360}N=(No-0.0529539*sun.D)%360;if(N<0){N+=360}C=l-sun.lon;Ev=1.2739*Math.sin((2*C-Mm)*d2r);sinMo=Math.sin(sun.Mo*d2r);Ae=0.1858*sinMo;A3=0.37*sinMo;Mprimem=Mm+Ev-Ae-A3;Ec=6.2886*Math.sin(Mprimem*d2r);A4=0.214*Math.sin(2*Mprimem*d2r);lprime=l+Ev+Ec-Ae+A4;V=0.6583*Math.sin(2*(lprime-sun.lon)*d2r);lprimeprime=lprime+V;Nprime=N-0.16*sinMo;lppNp=(lprimeprime-Nprime)*d2r;sinlppNp=Math.sin(lppNp);y=sinlppNp*Math.cos(i*d2r);x=Math.cos(lppNp);lm=Math.atan2(y,x)/d2r+Nprime;Bm=Math.asin(sinlppNp*Math.sin(i*d2r))/d2r;if(lm>360){lm-=360}return{moon:{lon:lm,lat:Bm},sun:sun}};VirtualSky.prototype.sunPos=function(JD){var D,eg,wg,e,N,Mo,v,lon,lat;D=(JD-2455196.5);eg=279.557208;wg=283.112438;e=0.016705;N=((360/365.242191)*D)%360;if(N<0){N+=360}Mo=(N+eg-wg)%360;if(Mo<0){Mo+=360}v=Mo+(360/Math.PI)*e*Math.sin(Mo*Math.PI/180);lon=v+wg;if(lon>360){lon-=360}lat=0;return{lat:lat,lon:lon,Mo:Mo,D:D,N:N}};VirtualSky.prototype.meanObliquity=function(JD){if(!JD){JD=this.times.JD}var T,T2,T3;T=(JD-2451545)/36525;T2=T*T;T3=T2*T;return(23.4392917-0.0130041667*T-1.6667e-7*T2+5.027778e-7*T3)*this.d2r};VirtualSky.prototype.ecliptic2azel=function(l,b,LST,lat){if(!LST){this.times=this.astronomicalTimes();LST=this.times.LST}if(!lat){lat=this.latitude}var sl,cl,sb,cb,v,e,ce,se,Cprime,s,ST,cST,sST,B,r,sphi,cphi,A,w,theta,psi;sl=Math.sin(l);cl=Math.cos(l);sb=Math.sin(b);cb=Math.cos(b);v=[cl*cb,sl*cb,sb];e=this.meanObliquity();ce=Math.cos(e);se=Math.sin(e);Cprime=[[1,0,0],[0,ce,-se],[0,se,ce]];s=this.vectorMultiply(Cprime,v);ST=LST*15*this.d2r;cST=Math.cos(ST);sST=Math.sin(ST);B=[[cST,sST,0],[sST,-cST,0],[0,0,1]];r=this.vectorMultiply(B,s);sphi=Math.sin(lat);cphi=Math.cos(lat);A=[[-sphi,0,cphi],[0,-1,0],[cphi,0,sphi]];w=this.vectorMultiply(A,r);theta=Math.atan2(w[1],w[0]);psi=Math.asin(w[2]);return{az:theta,el:psi}};VirtualSky.prototype.ecliptic2radec=function(l,b,JD){var e=this.meanObliquity();var sl=Math.sin(l);var cl=Math.cos(l);var sb=Math.sin(b);var cb=Math.cos(b);var tb=Math.tan(b);var se=Math.sin(e);var ce=Math.cos(e);ra=Math.atan2((sl*ce-tb*se),(cl));dec=Math.asin(sb*ce+cb*se*sl);if(ra<0){ra+=Math.PI+Math.PI}return{ra:ra,dec:dec}};VirtualSky.prototype.ecliptic2xy=function(l,b,LST){LST=LST||this.times.LST;if(typeof this.projection.ecliptic2xy==="function"){return this.projection.ecliptic2xy.call(this,l,b,LST)}else{if(this.fullsky){var pos=this.ecliptic2radec(l,b);return this.radec2xy(pos.ra,pos.dec)}else{var pos=this.ecliptic2azel(l,b,LST);var el=pos.el*this.r2d;pos=this.azel2xy(pos.az-(this.az_off*this.d2r),pos.el,this.wide,this.tall);pos.el=el;return pos}}return 0};VirtualSky.prototype.radec2xy=function(ra,dec){if(typeof this.projection.radec2xy==="function"){return this.projection.radec2xy.call(this,ra,dec)}else{var coords=this.coord2horizon(ra,dec);if(coords[0]>0){var pos=this.azel2xy(coords[1]-(this.az_off*this.d2r),coords[0],this.wide,this.tall);return{x:pos.x,y:pos.y,az:coords[1]*this.r2d,el:coords[0]*this.r2d}}}return 0};VirtualSky.prototype.azel2xy=function(az,el,w,h){return{x:-1,y:-1}};VirtualSky.prototype.azel2radec=function(az,el){return{ra:0,dec:0}};VirtualSky.prototype.gal2xy=function(l,b){var pos=this.gal2radec(l,b);return this.radec2xy(pos[0],pos[1])};VirtualSky.prototype.gal2radec=function(l,b){return this.Transform([l,b],[-0.054875539726,0.494109453312,-0.867666135858,-0.87343710801,-0.444829589425,-0.198076386122,-0.483834985808,0.74698225181,0.455983795705],false)};VirtualSky.prototype.Transform=function(p,rot,indeg){if(indeg){p[0]*=this.d2r;p[1]*=this.d2r}var cp1=Math.cos(p[1]);var m=[Math.cos(p[0])*cp1,Math.sin(p[0])*cp1,Math.sin(p[1])];var s=[m[0]*rot[0]+m[1]*rot[1]+m[2]*rot[2],m[0]*rot[3]+m[1]*rot[4]+m[2]*rot[5],m[0]*rot[6]+m[1]*rot[7]+m[2]*rot[8]];var r=Math.sqrt(s[0]*s[0]+s[1]*s[1]+s[2]*s[2]);var b=Math.asin(s[2]/r);var cb=Math.cos(b);var a=Math.atan2(((s[1]/r)/cb),((s[0]/r)/cb));if(a<0){a+=Math.PI*2}if(indeg){return[a*this.r2d,b*this.r2d]}else{return[a,b]}};VirtualSky.prototype.fk1tofk5=function(a,b){return this.Transform([a,b],[0.9995358730015703,-0.02793693620138929,-0.012147682028606801,0.027936935758478665,0.9996096732234282,-0.00016976035344812515,0.012147683047201562,-0.00016968744936278707,0.9999261997781408])};VirtualSky.prototype.vectorMultiply=function(A,B){if(B.length>0){if(B[0].length>0){return[[(A[0][0]*B[0][0]+A[0][1]*B[1][0]+A[0][2]*B[2][0]),(A[0][0]*B[0][1]+A[0][1]*B[1][1]+A[0][2]*B[2][1]),(A[0][0]*B[0][2]+A[0][1]*B[1][2]+A[0][2]*B[2][2])],[(A[1][0]*B[0][0]+A[1][1]*B[1][0]+A[1][2]*B[2][0]),(A[1][0]*B[0][1]+A[1][1]*B[1][1]+A[1][2]*B[2][1]),(A[1][0]*B[0][2]+A[1][1]*B[1][2]+A[1][2]*B[2][2])],[(A[2][0]*B[0][0]+A[2][1]*B[1][0]+A[2][2]*B[2][0]),(A[2][0]*B[0][1]+A[2][1]*B[1][1]+A[2][2]*B[2][1]),(A[2][0]*B[0][2]+A[2][1]*B[1][2]+A[2][2]*B[2][2])]]}else{return[(A[0][0]*B[0]+A[0][1]*B[1]+A[0][2]*B[2]),(A[1][0]*B[0]+A[1][1]*B[1]+A[1][2]*B[2]),(A[2][0]*B[0]+A[2][1]*B[1]+A[2][2]*B[2])]}}};VirtualSky.prototype.setFont=function(){this.ctx.font=this.fontsize()+"px "+this.canvas.css("font-family")};VirtualSky.prototype.fontsize=function(){if(this.fntsze){return parseInt(this.fntsze)}var m=Math.min(this.wide,this.tall);return(m<600)?((m<500)?((m<350)?((m<300)?((m<250)?9:10):11):12):14):parseInt(this.container.css("font-size"))};VirtualSky.prototype.positionCredit=function(){this.container.find("."+this.id+"_credit").css({position:"absolute",top:parseFloat(this.tall)-5-this.fontsize(),left:5})};VirtualSky.prototype.updateSkyGradient=function(){var s=null;if(this.ctx&&this.hasGradient()){if(this.projection.polartype){if(typeof this.ctx.createRadialGradient==="function"){s=this.ctx.createRadialGradient(this.wide/2,this.tall/2,0,this.wide/2,this.tall/2,this.tall/2);s.addColorStop(0,"rgba(0,0,0,1)");s.addColorStop(0.7,"rgba(0,0,0,0.2)");s.addColorStop(1,"rgba(0,50,80,0.3)")}}else{s=this.ctx.createLinearGradient(0,0,0,this.tall);s.addColorStop(0,"rgba(0,30,50,0.1)");s.addColorStop(0.7,"rgba(0,30,50,0.35)");s.addColorStop(1,"rgba(0,50,80,0.6)")}}this.skygrad=s;return this};VirtualSky.prototype.draw=function(proj){if(this.wide<=0||this.tall<=0){return this}if(!(this.c&&this.c.getContext)){return this}if(proj!==undefined){this.selectProjection(proj)}var white=this.col.white;var black=this.col.black;var c=this.ctx;var d=this.container;c.moveTo(0,0);c.clearRect(0,0,this.wide,this.tall);c.fillStyle=(this.polartype||this.fullsky)?this.background:((this.negative)?white:black);c.fillRect(0,0,this.wide,this.tall);c.fill();if(this.polartype){c.moveTo(this.wide/2,this.tall/2);c.closePath();c.beginPath();c.arc(this.wide/2,this.tall/2,-0.5+this.tall/2,0,Math.PI*2,true);c.closePath();if(!this.transparent){c.fillStyle=(this.hasGradient())?"rgba(0,15,30, 1)":((this.negative)?white:black);c.fill()}c.lineWidth=0.5;c.strokeStyle=black;c.stroke()}else{if(typeof this.projection.draw==="function"){this.projection.draw.call(this)}}if(this.hasGradient()){if(this.skygrad===undefined){this.updateSkyGradient()}else{c.beginPath();c.fillStyle=this.skygrad;if(this.projection.polartype){c.arc(this.wide/2,this.tall/2,this.tall/2,0,2*Math.PI,false);c.fill()}else{c.fillRect(0,0,this.wide,this.tall)}c.closePath()}}this.drawGridlines("az").drawGridlines("eq").drawGridlines("gal").drawGalaxy().drawConstellationLines().drawConstellationBoundaries().drawStars().drawEcliptic().drawMeridian().drawPlanets().drawMeteorShowers().drawCardinalPoints();for(var i=0;i<this.pointers.length;i++){this.highlight(i)}var txtcolour=(this.color!="")?(this.color):this.col.txt;var fontsize=this.fontsize();c.fillStyle=txtcolour;c.lineWidth=1.5;this.setFont();if(this.showdate){var clockstring=this.clock.toDateString()+" "+this.clock.toLocaleTimeString();var metric_clock=this.drawText(clockstring,5,5+fontsize)}if(this.showposition){var positionstring=Math.abs(this.latitude*this.r2d).toFixed(2)+((this.latitude>0)?this.getPhrase("N"):this.getPhrase("S"))+", "+Math.abs(this.longitude*this.r2d).toFixed(2)+((this.longitude>0)?this.getPhrase("E"):this.getPhrase("W"));var metric_pos=this.drawText(positionstring,5,5+fontsize+fontsize)}if(this.credit){var credit=this.getPhrase("power");var metric_credit=this.drawText(credit,5,this.tall-5);if(d.find("."+this.id+"_credit").length==0){d.append('<div class="'+this.id+'_credit"><a href="http://virtualsky.lco.global/" target="_parent" title="Las Cumbres Observatory Global Telescope">'+this.getPhrase("powered")+"</a></div>")}d.find("."+this.id+"_credit").css({padding:0,zIndex:20,display:"block",overflow:"hidden",backgroundColor:"transparent"});d.find("."+this.id+"_credit a").css({display:"block",width:Math.ceil(metric_credit)+"px",height:fontsize+"px","font-size":fontsize+"px"});this.positionCredit()}if(this.showhelp){var helpstr="?";if(d.find("."+this.id+"_help").length==0){d.append('<div class="'+this.id+'_help"><a href="#">'+helpstr+"</a></div>").find("."+this.id+"_help").css({position:"absolute",padding:5,zIndex:20,display:"block",overflow:"hidden",backgroundColor:"transparent",right:0,top:0,"font-size":fontsize}).find("a").css({"text-decoration":"none",color:txtcolour}).on("click",{me:this},function(e){e.data.me.toggleHelp()})}d.find("."+this.id+"_help").css({"font-size":fontsize}).find("a").css({color:txtcolour})}if(this.container.find("."+this.id+"_clock").length==0){this.container.append('<div class="'+this.id+'_clock" title="'+this.getPhrase("datechange")+'">'+clockstring+"</div>")}var off=$("#"+this.idinner).position();this.container.find("."+this.id+"_clock").css({position:"absolute",padding:0,width:metric_clock,cursor:"pointer",top:off.top+5,left:off.left+5,zIndex:20,display:"block",overflow:"hidden",backgroundColor:"transparent",fontSize:fontsize+"px",color:"transparent"}).bind("click",{sky:this},function(e){var s=e.data.sky;var id=s.id;var hid="#"+id;var v="virtualsky";if($(hid+"_calendar").length==0){var off=$(hid).offset();var w=280;var h=50;if(s.wide<w){w=s.wide}s.container.append('<div id="'+id+'_calendar" class="'+v+'form"><div style="" id="'+id+'_calendar_close" class="'+v+'_dismiss" title="'+e.data.sky.getPhrase("close")+'">×</div><div style="text-align:center;margin:2px;">'+e.data.sky.getPhrase("date")+'</div><div style="text-align:center;"><input type="text" id="'+id+'_year" style="width:3.2em;" value="" /><div class="divider">/</div><input type="text" id="'+id+'_month" style="width:1.6em;" value="" /><div class="divider">/</div><input type="text" id="'+id+'_day" style="width:1.6em;" value="" /><div class="divider"> </div><input type="text" id="'+id+'_hours" style="width:1.6em;" value="" /><div class="divider">:</div><input type="text" id="'+id+'_mins" style="width:1.6em;" value="" /></div></div>');$(hid+"_calendar").css({width:w});$(hid+"_calendar input").bind("change",{sky:s},function(e){e.data.sky.updateClock(new Date(parseInt($("#"+id+"_year").val()),parseInt($("#"+id+"_month").val()-1),parseInt($("#"+id+"_day").val()),parseInt($("#"+id+"_hours").val()),parseInt($("#"+id+"_mins").val()),0,0));e.data.sky.calendarUpdate();e.data.sky.draw()})}s.lightbox($(hid+"_calendar"));$(hid+"_year").val(s.clock.getFullYear());$(hid+"_month").val(s.clock.getMonth()+1);$(hid+"_day").val(s.clock.getDate());$(hid+"_hours").val(s.clock.getHours());$(hid+"_mins").val(s.clock.getMinutes())});if($("."+this.id+"_position").length==0){this.container.append('<div class="'+this.id+'_position" title="'+this.getPhrase("positionchange")+'">'+positionstring+"</div>")}var off=$("#"+this.idinner).position();$("."+this.id+"_position").css({position:"absolute",padding:0,width:metric_pos,cursor:"pointer",top:off.top+5+fontsize,left:off.left+5,zIndex:20,fontSize:fontsize+"px",display:"block",overflow:"hidden",backgroundColor:"transparent",fontSize:fontsize+"px",color:"transparent"}).bind("click",{sky:this},function(e){var s=e.data.sky;var id=s.id;var hid="#"+id;var v="virtualsky";if($(hid+"_geo").length==0){var w=310;var narrow="";if(s.wide<w){narrow='<br style="clear:both;margin-top:20px;" />';w=w/2}s.container.append('<div id="'+id+'_geo" class="'+v+'form"><div id="'+id+'_geo_close" class="'+v+'_dismiss" title="'+s.getPhrase("close")+'">×</div><div style="text-align:center;margin:2px;">'+s.getPhrase("position")+'</div><div style="text-align:center;"><input type="text" id="'+id+'_lat" value="" style="padding-right:10px!important;"><div class="divider">'+s.getPhrase("N")+"</div>"+narrow+'<input type="text" id="'+id+'_long" value="" /><div class="divider">'+s.getPhrase("E")+"</div></div></div>");$(hid+"_geo").css({width:w,align:"center"});$(hid+"_geo input").css({width:"6em"});$(hid+"_geo_close").bind("click",{sky:s},function(e){e.data.sky.setGeo($(hid+"_lat").val()+","+$(hid+"_long").val()).setClock(0).draw()})}s.lightbox($(hid+"_geo"));$(hid+"_lat").val(s.latitude*s.r2d);$(hid+"_long").val(s.longitude*s.r2d);if(typeof s.callback.geo=="function"){s.callback.geo.call(s)}});return this};VirtualSky.prototype.lightbox=function(lb){if(!lb.length){return this}function columize(){lb.find("li").css({display:"inline-block","margin-left":"0px",width:"auto"});lb.find("ul").css({width:"auto"});lb.css({position:"relative"});w=lb.outerWidth();var bar=24;var li=lb.find("ul li");var mx=1;for(var i=0;i<li.length;i++){if(li.eq(i).width()>mx){mx=li.eq(i).width()}}var n=Math.floor(w/(mx+bar));if(n>1){if(n>3){n=3}lb.find("li").css({width:(mx)+"px","margin-left":Math.floor(bar/2)+"px"});lb.find("li:nth-child("+n+"n+1)").css({"margin-left":"0px"})}else{lb.find("li").css({display:"block",width:"auto"})}lb.find("ul").css({width:"100%"}).parent().css({width:Math.min(w-bar,(mx+bar/2)*n+bar)+"px"});lb.css({"z-index":100,position:"absolute"});lb.css({left:Math.floor((this.wide-lb.outerWidth())/2)+"px",top:((this.tall-lb.height())/2)+"px"})}columize.call(this);var n="virtualsky_bg";if(this.container.find("."+n).length==0){this.container.append('<div class="'+n+'" style="position:absolute;z-index: 99;left:0px;top: 0px;right: 0px;bottom: 0px;background-color: rgba(0,0,0,0.7);"></div>')}var bg=this.container.find("."+n).show();lb.css({left:((this.wide-lb.outerWidth())/2)+"px",top:((this.tall-lb.outerHeight())/2)+"px"}).show();this.container.find(".virtualsky_dismiss").click({lb:lb,bg:bg},function(e){lb.remove();bg.remove()});bg.click({lb:lb,bg:bg},function(e){lb.hide();bg.hide()});$(window).resize({vs:this,fn:columize},function(e){e.data.fn.call(e.data.vs)});return this};VirtualSky.prototype.drawStars=function(){if(!this.showstars&&!this.showstarlabels){return this}var mag,i,j,p,d,atmos,fovf;var c=this.ctx;c.beginPath();c.fillStyle=this.col.stars;this.az_off=(this.az_off+360)%360;atmos=this.hasAtmos();fovf=Math.sqrt(30/this.fov);var f=1;if(this.negative){f*=1.4}if(typeof this.scalestars==="number"&&this.scalestars!=1){f*=this.scalestars}if(this.projection.id==="gnomic"){f*=fovf}for(i=0;i<this.stars.length;i++){if(this.stars[i][1]<this.magnitude){mag=this.stars[i][1];p=this.radec2xy(this.stars[i][2],this.stars[i][3]);if(this.isVisible(p.el)&&!isNaN(p.x)&&!this.isPointBad(p)){d=0.8*Math.max(3-mag/2.1,0.5);if(atmos){d*=Math.exp(-(90-p.el)*0.01)}d*=f;c.moveTo(p.x+d,p.y);if(this.showstars){c.arc(p.x,p.y,d,0,Math.PI*2,true)}if(this.showstarlabels&&this.starnames[this.stars[i][0]]){this.drawLabel(p.x,p.y,d,"",this.htmlDecode(this.starnames[this.stars[i][0]]))}}}}c.fill();return this};VirtualSky.prototype.hasAtmos=function(){return(typeof this.projection.atmos==="boolean")?(this.gradient?this.projection.atmos:this.gradient):this.gradient};VirtualSky.prototype.hasGradient=function(){return(this.hasAtmos()&&!this.fullsky&&!this.negative)?true:false};VirtualSky.prototype.interpolate=function(jd,data){var mindt=jd;var mini=0;for(var i=0;i<data.length;i+=4){var dt=(jd-data[i]);if(Math.abs(dt)<Math.abs(mindt)){mindt=dt;mini=i}}var dra,ddec,dmag,pos_2,pos_1,fract;if(mindt>=0){pos_2=mini+1+4;pos_1=mini+1;fract=mindt/Math.abs(data[pos_2-1]-data[pos_1-1])}else{pos_2=mini+1;pos_1=mini+1-4;fract=(1+(mindt)/Math.abs(data[pos_2-1]-data[pos_1-1]))}if(pos_2>data.length||pos_1<0){dra=data[mini+1];ddec=data[mini+2];dmag=data[mini+3]}else{dra=(Math.abs(data[pos_2]-data[pos_1])>180)?(data[pos_1]+(data[pos_2]+360-data[pos_1])*fract)%360:(data[pos_1]+(data[pos_2]-data[pos_1])*fract)%360;ddec=data[pos_1+1]+(data[pos_2+1]-data[pos_1+1])*fract;dmag=data[pos_1+2]+(data[pos_2+2]-data[pos_1+2])*fract}return{ra:dra,dec:ddec,mag:dmag}};VirtualSky.prototype.drawPlanets=function(){if(!this.showplanets&&!this.showplanetlabels&&!this.showorbits){return this}if(!this.planets||this.planets.length<=0){return this}var ra,dec,mag,pos,p;var c=this.ctx;var oldjd=this.jd;this.jd=this.times.JD;var colour=this.col.grey;var maxl=this.maxLine();for(p=0;p<this.planets.length;p++){if(!this.planets[p]){continue}if(this.planets[p].length==3){if(this.planets[p][2].length%4==0){if(this.jd>this.planets[p][2][0]&&this.jd<this.planets[p][2][(this.planets[p][2].length-4)]){var interp=this.interpolate(this.jd,this.planets[p][2]);ra=interp.ra;dec=interp.dec;mag=interp.mag}else{continue}}}else{ra=this.planets[p][2];dec=this.planets[p][3]}pos=this.radec2xy(ra*this.d2r,dec*this.d2r);if(!this.negative){colour=this.planets[p][1]}if(typeof colour==="string"){c.strokeStyle=colour}if((this.showplanets||this.showplanetlabels)&&this.isVisible(pos.el)&&mag<this.magnitude&&!this.isPointBad(pos)){var d=0;if(mag!==undefined){d=0.8*Math.max(3-mag/2,0.5);if(this.hasAtmos()){d*=Math.exp(-((90-pos.el)*this.d2r)*0.6)}}if(d<1.5){d=1.5}this.drawPlanet(pos.x,pos.y,d,colour,this.planets[p][0])}if(this.showorbits&&mag<this.magnitude){c.beginPath();c.lineWidth=0.5;this.setFont();c.lineWidth=1;var previous={x:-1,y:-1,el:-1};for(i=0;i<this.planets[p][2].length-4;i+=4){var point=this.radec2xy(this.planets[p][2][i+1]*this.d2r,this.planets[p][2][i+2]*this.d2r);if(previous.x>0&&previous.y>0&&this.isVisible(point.el)){c.moveTo(previous.x,previous.y);if(Math.abs(point.x-previous.x)<maxl){c.lineTo(point.x,point.y)}}previous=point}c.stroke()}}if(this.showplanets||this.showplanetlabels){if(oldjd!=this.jd){var p=this.moonPos(this.jd);this.moon=p.moon;this.sun=p.sun}var pos;pos=this.ecliptic2xy(this.sun.lon*this.d2r,this.sun.lat*this.d2r,this.times.LST);if(this.isVisible(pos.el)&&!this.isPointBad(pos)){this.drawPlanet(pos.x,pos.y,5,this.col.sun,"sun")}pos=this.ecliptic2xy(this.moon.lon*this.d2r,this.moon.lat*this.d2r,this.times.LST);if(this.isVisible(pos.el)&&!this.isPointBad(pos)){this.drawPlanet(pos.x,pos.y,5,this.col.moon,"moon")}}return this};VirtualSky.prototype.drawPlanet=function(x,y,d,colour,label){var c=this.ctx;c.beginPath();c.fillStyle=colour;c.strokeStyle=colour;c.moveTo(x+d,y+d);if(this.showplanets){c.arc(x,y,d,0,Math.PI*2,true)}label=this.getPhrase("planets",label);if(this.showplanetlabels){this.drawLabel(x,y,d,colour,label)}c.fill();return this};VirtualSky.prototype.drawText=function(txt,x,y){this.ctx.beginPath();this.ctx.fillText(txt,x,y);return this.ctx.measureText(txt).width};VirtualSky.prototype.drawLabel=function(x,y,d,colour,label){if(label===undefined){return this}var c=this.ctx;if(colour.length>0){c.fillStyle=colour}c.lineWidth=1.5;var xoff=d;if((this.polartype)&&c.measureText){xoff=-c.measureText(label).width-3}if((this.polartype)&&x<this.wide/2){xoff=d}c.fillText(label,x+xoff,y-(d+2));return this};VirtualSky.prototype.drawConstellationLines=function(colour){if(!(this.constellation.lines||this.constellation.labels)){return this}if(!colour){colour=this.col.constellation}var x=this.ctx;x.beginPath();x.strokeStyle=colour;x.fillStyle=colour;x.lineWidth=0.75;var fontsize=this.fontsize();this.setFont();if(typeof this.lines!=="object"){return this}var pos,posa,posb,a,b,idx,l;var maxl=this.maxLine();for(var c=0;c<this.lines.length;c++){if(this.constellation.lines){for(l=3;l<this.lines[c].length;l+=2){a=-1;b=-1;idx1=""+this.lines[c][l]+"";idx2=""+this.lines[c][l+1]+"";if(!this.hipparcos[idx1]){for(s=0;s<this.stars.length;s++){if(this.stars[s][0]==this.lines[c][l]){this.hipparcos[idx1]=s;break}}}if(!this.hipparcos[idx2]){for(s=0;s<this.stars.length;s++){if(this.stars[s][0]==this.lines[c][l+1]){this.hipparcos[idx2]=s;break}}}a=this.hipparcos[idx1];b=this.hipparcos[idx2];if(a>=0&&b>=0&&a<this.stars.length&&b<this.stars.length){posa=this.radec2xy(this.stars[a][2],this.stars[a][3]);posb=this.radec2xy(this.stars[b][2],this.stars[b][3]);if(this.isVisible(posa.el)&&this.isVisible(posb.el)){if(!this.isPointBad(posa)&&!this.isPointBad(posb)){if(Math.abs(posa.x-posb.x)<maxl&&Math.abs(posa.y-posb.y)<maxl){x.moveTo(posa.x,posa.y);x.lineTo(posb.x,posb.y)}}}}}}if(this.constellation.labels){pos=this.radec2xy(this.lines[c][1]*this.d2r,this.lines[c][2]*this.d2r);if(this.isVisible(pos.el)){label=this.getPhrase("constellations",this.lines[c][0]);xoff=(x.measureText)?-x.measureText(label).width/2:0;x.fillText(label,pos.x+xoff,pos.y-fontsize/2);x.fill()}}}x.stroke();return this};VirtualSky.prototype.drawConstellationBoundaries=function(colour){if(!this.constellation.boundaries){return this}if(!colour){colour=this.col.constellationboundary}this.ctx.beginPath();this.ctx.strokeStyle=colour;this.ctx.fillStyle=colour;this.ctx.lineWidth=0.75;if(typeof this.boundaries!=="object"){return this}var posa,posb,a,b,l,c,d,atob,btoa,move,i,j,ra,dc,dra,ddc,b3;atob="";btoa="";var n=5;var maxl=this.maxLine(5);if(!this.constellation.bpts){this.constellation.bpts=new Array(this.boundaries.length)}var cbdone=[];if(this.constellation.boundaries){for(c=0;c<this.boundaries.length;c++){if(typeof this.boundaries!=="string"&&c<this.boundaries.length){if(this.constellation.bpts[c]){var points=this.constellation.bpts[c]}else{var points=[];for(l=1;l<this.boundaries[c].length;l+=2){b=[this.boundaries[c][l],this.boundaries[c][l+1]];if(a){atob=a[0]+","+a[1]+"-"+b[0]+","+b[1];btoa=b[0]+","+b[1]+"-"+a[0]+","+a[1]}if(l>1){move=(cbdone[atob]||cbdone[btoa]);ra=(b[0]-a[0])%360;if(ra>180){ra=ra-360}if(ra<-180){ra=ra+360}dc=(b[1]-a[1]);n=(move)?5:2;if(ra/2>n){n=parseInt(ra)}if(dc/2>n){n=parseInt(dc)}dra=ra/n;ddc=dc/n;for(var i=1;i<=n;i++){ra=a[0]+(i*dra);if(ra<0){ra+=360}dc=a[1]+(i*ddc);d=this.fk1tofk5(ra*this.d2r,dc*this.d2r);points.push([d[0],d[1],move])}}cbdone[atob]=true;cbdone[btoa]=true;a=b}this.constellation.bpts[c]=points}posa=null;for(i=0;i<=points.length;i++){j=(i==points.length)?0:i;posb=this.radec2xy(points[j][0],points[j][1]);if(posa&&this.isVisible(posa.el)&&this.isVisible(posb.el)&&points[j][2]){if(!this.isPointBad(posa)&&!this.isPointBad(posb)){if(Math.abs(posa.x-posb.x)<maxl&&Math.abs(posa.y-posb.y)<maxl){this.ctx.moveTo(posa.x,posa.y);this.ctx.lineTo(posb.x,posb.y)}}}posa=posb}}}cbdone=[]}this.ctx.stroke();return this};VirtualSky.prototype.drawGalaxy=function(colour){if(!this.galaxy||!this.showgalaxy){return this}if(!colour){colour=this.col.galaxy}this.ctx.beginPath();this.ctx.strokeStyle=colour;this.ctx.fillStyle=colour;this.ctx.lineWidth=1;if(typeof this.boundaries!=="object"){return this}var p,pa,pb,i,c,old,maxl;maxl=this.maxLine(5);for(c=0;c<this.galaxy.length;c++){if(!this.galaxyprocessed){for(i=1;i<this.galaxy[c].length;i++){this.galaxy[c][i]*=this.d2r}}p=this.galaxy[c].slice(0);p.shift();pa=null;for(i=0;i<p.length;i+=2){pb=this.radec2xy(p[i],p[i+1]);if(pa){if(Math.abs(pa.x-pb.x)<maxl&&Math.abs(pa.y-pb.y)<maxl){this.ctx.moveTo(pa.x,pa.y);this.ctx.lineTo(pb.x,pb.y)}}pa=pb}}this.galaxyprocessed=true;this.ctx.stroke();return this};VirtualSky.prototype.drawMeteorShowers=function(colour){if(!this.meteorshowers||typeof this.showers==="string"){return this}if(!colour){colour=this.col.showers}var shower,pos,label,xoff,c,d,p,start,end,dra,ddc,f;c=this.ctx;c.beginPath();c.strokeStyle=colour;c.fillStyle=colour;c.lineWidth=0.75;var fs=this.fontsize();this.setFont();var y=this.clock.getFullYear();for(var s in this.showers){d=this.showers[s].date;p=this.showers[s].pos;start=new Date(y,d[0][0]-1,d[0][1]);end=new Date(y,d[1][0]-1,d[1][1]);if(start>end&&this.clock<start){start=new Date(y-1,d[0][0]-1,d[0][1])}if(this.clock>start&&this.clock<end){dra=(p[1][0]-p[0][0]);ddc=(p[1][1]-p[0][1]);f=(this.clock-start)/(end-start);pos=this.radec2xy((this.showers[s].pos[0][0]+(dra*f))*this.d2r,(this.showers[s].pos[0][1]+(ddc*f))*this.d2r);if(this.isVisible(pos.el)){label=this.htmlDecode(this.showers[s].name);xoff=(c.measureText)?-c.measureText(label).width/2:0;c.moveTo(pos.x+2,pos.y);c.arc(pos.x,pos.y,2,0,Math.PI*2,true);c.fillText(label,pos.x+xoff,pos.y-fs/2)}}}c.fill();return this};VirtualSky.prototype.drawEcliptic=function(colour){if(!this.ecliptic){return this}if(!colour||typeof colour!="string"){colour=this.col.ec}var c=this.ctx;var step=2*this.d2r;c.beginPath();c.strokeStyle=colour;c.lineWidth=3;var maxl=this.maxLine();var old={x:-1,y:-1,moved:false};for(var a=0;a<Math.PI*2;a+=step){old=joinpoint(this,"ec",a,0,old,maxl)}c.stroke();return this};VirtualSky.prototype.drawMeridian=function(colour){if(!this.meridian){return this}if(!colour||typeof colour!="string"){colour=this.col.meridian}var c=this.ctx;var a,b;var minb=0;var maxb=(typeof this.projection.maxb==="number")?this.projection.maxb*this.d2r:Math.PI/2;var step=2*this.d2r;var maxl=this.maxLine();c.beginPath();c.strokeStyle=colour;c.lineWidth=2;var old={x:-1,y:-1,moved:false};for(b=minb,a=0;b<=maxb;b+=step){old=joinpoint(this,"az",Math.PI,b,old,maxl)}for(b=maxb,a=0;b>=minb;b-=step){old=joinpoint(this,"az",0,b,old,maxl)}c.stroke();return this};VirtualSky.prototype.drawGridlines=function(type,step,colour){if(!type||!this.grid[type]){return this}if(typeof colour!=="string"){colour=this.col[type]}if(typeof step!=="number"){step=this.grid.step}var maxb,minb,x,y,a,b,pos,c,oldx,oldy,bstep2,ra,dc;c=this.ctx;oldx=0;oldy=0;c.beginPath();c.strokeStyle=colour;c.lineWidth=1;bstep=2;if(type=="az"){maxb=(typeof this.projection.maxb==="number")?this.projection.maxb:90-bstep;minb=0}else{maxb=90-bstep;minb=-maxb}var maxl=this.maxLine(5);old={x:-1,y:-1,moved:false};step*=this.d2r;bstep*=this.d2r;minb*=this.d2r;maxb*=this.d2r;for(a=0;a<Math.PI*2;a+=step){old.moved=false;for(b=minb;b<=maxb;b+=bstep){old=joinpoint(this,type,a,b,old,maxl)}}c.stroke();c.beginPath();if(type=="az"){minb=0;maxb=90-bstep*this.r2d}else{minb=-90+step*this.r2d;maxb=90}minb*=this.d2r;maxb*=this.d2r;old={x:-1,y:-1,moved:false};for(b=minb;b<maxb;b+=step){old.moved=false;for(a=0;a<=2*Math.PI;a+=bstep){old=joinpoint(this,type,a,b,old,maxl)}}c.stroke();return this};VirtualSky.prototype.drawCardinalPoints=function(){if(!this.cardinalpoints){return this}var i,x,y,pos,ang,f,m,r;var azs=new Array(0,90,180,270);var d=[this.getPhrase("N"),this.getPhrase("E"),this.getPhrase("S"),this.getPhrase("W")];var pt=15;var c=this.ctx;c.beginPath();c.fillStyle=this.col.cardinal;var fontsize=this.fontsize();for(i=0;i<azs.length;i++){if(c.measureText){m=c.measureText(d[i]);r=(m.width>fontsize)?m.width/2:fontsize/2}else{r=fontsize/2}ang=(azs[i]-this.az_off)*this.d2r;if(this.polartype){f=(this.tall/2)-r*1.5;x=-f*Math.sin(ang);y=-f*Math.cos(ang);x=isFinite(x)?this.wide/2+x-r:0;y=isFinite(y)?this.tall/2+y+r:0}else{pos=this.azel2xy(ang,0,this.wide,this.tall);x=isFinite(pos.x)?pos.x-r:0;y=isFinite(pos.y)?pos.y-pt/2:0;if(x<0||x>this.wide-pt){x=-r}}if(x>0){c.fillText(d[i],x,y)}}c.fill();return this};VirtualSky.prototype.highlight=function(i,colour){var p=this.pointers[i];if(this.pointers[i].ra&&this.pointers[i].dec){colour=p.colour||colour||"rgba(255,0,0,1)";if(this.negative){colour=this.getNegative(colour)}var pos=this.radec2xy(p.ra*this.d2r,p.dec*this.d2r);var c=this.ctx;if(this.isVisible(pos.el)){p.az=pos.az;p.el=pos.el;p.x=pos.x;p.y=pos.y;c.fillStyle=colour;c.strokeStyle=colour;c.beginPath();c.fillRect(p.x-p.d/2,p.y-p.d/2,p.d,p.d);c.fill();this.drawLabel(p.x,p.y,p.d,colour,p.label)}}return this};function joinpoint(s,type,a,b,old,maxl){var x,y,show,c,pos;c=s.ctx;if(type=="az"){pos=s.azel2xy((a-s.az_off*s.d2r),b,s.wide,s.tall)}else{if(type=="eq"){pos=s.radec2xy(a,b)}else{if(type=="ec"){pos=s.ecliptic2xy(a,b,s.times.LST)}else{if(type=="gal"){pos=s.gal2xy(a,b)}}}}x=pos.x;y=pos.y;if(type=="az"){show=true}else{show=((s.isVisible(pos.el))?true:false)}if(show&&isFinite(x)&&isFinite(y)){if(type=="az"){if(!old.moved||Math.sqrt(Math.pow(old.x-x,2)+Math.pow(old.y-y,2))>s.tall/2){c.moveTo(x,y)}c.lineTo(x,y);old.moved=true}else{if(!old.moved||Math.sqrt(Math.pow(old.x-x,2)+Math.pow(old.y-y,2))>maxl){c.moveTo(x,y);old.moved=true}else{c.lineTo(x,y)}}old.x=x;old.y=y}return old}VirtualSky.prototype.maxLine=function(f){if(this.projection.id==="gnomic"){return this.tall}if(typeof f!=="number"){f=3}return this.tall/f};VirtualSky.prototype.setGeo=function(pos){if(typeof pos!=="string"){return this}pos=pos.split(",");this.setLatitude(pos[0]);this.setLongitude(pos[1]);return this};VirtualSky.prototype.setLatitude=function(l){this.latitude=inrangeEl(parseFloat(l)*this.d2r);return this};VirtualSky.prototype.setLongitude=function(l){this.longitude=parseFloat(l)*this.d2r;while(this.longitude<=-Math.PI){this.longitude+=2*Math.PI}while(this.longitude>Math.PI){this.longitude-=2*Math.PI}return this};VirtualSky.prototype.setRADec=function(r,d){return this.setRA(r).setDec(d)};VirtualSky.prototype.setRA=function(r){this.ra_off=(r%360)*this.d2r;return this};VirtualSky.prototype.setDec=function(d){this.dc_off=d*this.d2r;return this};VirtualSky.prototype.panTo=function(ra,dec,s){if(!s){s=1000}if(typeof ra!=="number"||typeof dec!=="number"){return this}this.panning={s:{ra:this.ra_off*this.r2d,dec:this.dc_off*this.r2d},e:{ra:ra,dec:dec},duration:s,start:new Date()};this.panning.dr=this.panning.e.ra-this.panning.s.ra;this.panning.dd=this.panning.e.dec-this.panning.s.dec;if(this.panning.dr>180){this.panning.dr=-(360-this.panning.dr)}if(this.panning.dr<-180){this.panning.dr=(360+this.panning.dr)}return this.panStep()};window.requestAnimFrame=(function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||function(callback){window.setTimeout(callback,1000/60)}})();VirtualSky.prototype.panStep=function(){var ra,dc;var now=new Date();var t=(now-this.panning.start)/this.panning.duration;ra=this.panning.s.ra+(this.panning.dr)*(t);dc=this.panning.s.dec+(this.panning.dd)*(t);if(t<1){this.setRADec(ra,dc).draw();var _obj=this;requestAnimFrame(function(){_obj.panStep()})}else{this.setRADec(this.panning.e.ra,this.panning.e.dec).draw()}return this};VirtualSky.prototype.liveSky=function(pos){this.islive=!this.islive;if(this.islive){interval=window.setInterval(function(sky){sky.setClock("now")},1000,this)}else{if(interval!==undefined){clearInterval(interval)}}return this};VirtualSky.prototype.start=function(){this.islive=true;if(interval!==undefined){clearInterval(interval)}interval=window.setInterval(function(sky){sky.setClock("now")},1000,this)};VirtualSky.prototype.stop=function(){this.islive=false;if(interval!==undefined){clearInterval(interval)}};VirtualSky.prototype.advanceTime=function(by,wait){if(by===undefined){this.updateClock(new Date())}else{by=parseFloat(by);if(!wait){wait=1000/this.fps}var fn=function(vs,by){vs.setClock(by)};clearInterval(this.interval_time);clearInterval(this.interval_calendar);this.interval_time=window.setInterval(fn,wait,this,by);this.interval_calendar=window.setInterval(function(vs){vs.calendarUpdate()},1000,this)}return this};VirtualSky.prototype.updateClock=function(d){this.clock=d;this.times=this.astronomicalTimes()};VirtualSky.prototype.calendarUpdate=function(){for(var e=0;e<this.calendarevents.length;e++){if(is(this.calendarevents[e],"function")){this.calendarevents[e].call(this)}}return this};VirtualSky.prototype.setClock=function(seconds){if(seconds===undefined){return this}if(typeof seconds==="string"){seconds=convertTZ(seconds);if(!this.input.clock){if(seconds==="now"){this.updateClock(new Date())}else{this.updateClock(new Date(seconds))}}else{this.updateClock((typeof this.input.clock==="string")?this.input.clock.replace(/%20/g," "):this.input.clock);if(typeof this.clock==="string"){this.updateClock(new Date(this.clock))}}}else{if(typeof seconds==="object"){this.updateClock(seconds)}else{this.updateClock(new Date(this.clock.getTime()+seconds*1000))}}this.draw();return this};VirtualSky.prototype.toggleAtmosphere=function(){this.gradient=!this.gradient;this.draw();return this};VirtualSky.prototype.toggleStars=function(){this.showstars=!this.showstars;this.draw();return this};VirtualSky.prototype.toggleStarLabels=function(){this.showstarlabels=!this.showstarlabels;this.draw();return this};VirtualSky.prototype.toggleNegative=function(){this.negative=!this.negative;this.col=this.colours[(this.negative?"negative":"normal")];this.draw();return this};VirtualSky.prototype.toggleConstellationLines=function(){this.constellation.lines=!this.constellation.lines;this.draw();return this};VirtualSky.prototype.toggleConstellationBoundaries=function(){this.constellation.boundaries=!this.constellation.boundaries;this.draw();return this};VirtualSky.prototype.toggleConstellationLabels=function(){this.constellation.labels=!this.constellation.labels;this.draw();return this};VirtualSky.prototype.toggleMeteorShowers=function(){this.meteorshowers=!this.meteorshowers;this.draw();return this};VirtualSky.prototype.toggleCardinalPoints=function(){this.cardinalpoints=!this.cardinalpoints;this.draw();return this};VirtualSky.prototype.toggleGridlinesAzimuthal=function(){this.grid.az=!this.grid.az;this.draw();return this};VirtualSky.prototype.toggleGridlinesEquatorial=function(){this.grid.eq=!this.grid.eq;this.draw();return this};VirtualSky.prototype.toggleGridlinesGalactic=function(){this.grid.gal=!this.grid.gal;this.draw();return this};VirtualSky.prototype.toggleEcliptic=function(){this.ecliptic=!this.ecliptic;this.draw();return this};VirtualSky.prototype.toggleMeridian=function(){this.meridian=!this.meridian;this.draw();return this};VirtualSky.prototype.toggleGround=function(){this.ground=!this.ground;this.draw();return this};VirtualSky.prototype.toggleGalaxy=function(){this.showgalaxy=!this.showgalaxy;this.draw();return this};VirtualSky.prototype.toggleMeteorShowers=function(){this.meteorshowers=!this.meteorshowers;this.draw();return this};VirtualSky.prototype.togglePlanetHints=function(){this.showplanets=!this.showplanets;this.draw();return this};VirtualSky.prototype.togglePlanetLabels=function(){this.showplanetlabels=!this.showplanetlabels;this.draw();return this};VirtualSky.prototype.toggleOrbits=function(){this.showorbits=!this.showorbits;this.draw();return this};VirtualSky.prototype.toggleAzimuthMove=function(az){if(this.az_step===0){this.az_step=(typeof az==="number")?az:-1;this.moveIt()}else{this.az_step=0;if(this.timer_az!==undefined){clearTimeout(this.timer_az)}}return this};VirtualSky.prototype.addPointer=function(input){var style,url,img,label,credit;var matched=-1;var p;for(var i=0;i<this.pointers.length;i++){if(this.pointers[i].ra==input.ra&&this.pointers[i].dec==input.dec&&this.pointers[i].label==input.label){matched=i}}if(matched<0){input.ra*=1;input.dec*=1;i=this.pointers.length;p=input;p.d=is(p.d,"number")?p.d:5;if(typeof p.html!=="string"){style=p.style||"width:128px;height:128px;";url=p.url||"http://server1.wikisky.org/v2?ra="+(p.ra/15)+"&de="+(p.dec)+"&zoom=6&img_source=DSS2";img=p.img||"http://server7.sky-map.org/imgcut?survey=DSS2&w=128&h=128&ra="+(p.ra/15)+"&de="+p.dec+"&angle=0.25&output=PNG";label=p.credit||"View in Wikisky";credit=p.credit||"DSS2/Wikisky";p.html=p.html||'<div class="virtualsky_infocredit"><a href="'+url+'" style="color: white;">'+credit+'</a></div><a href="'+url+'" style="display:block;'+style+'"><img src="'+img+'" style="border:0px;'+style+'" title="'+label+'" /></a>'}this.pointers[i]=p}return(this.pointers.length)};VirtualSky.prototype.changeAzimuth=function(inc){this.az_off+=(typeof inc==="number")?inc:5;this.draw();return this};VirtualSky.prototype.moveIt=function(){this.timer_az=window.setTimeout(function(mysky){mysky.az_off+=mysky.az_step;mysky.draw();mysky.moveIt()},100,this);return this};VirtualSky.prototype.spinIt=function(tick,wait){if(typeof tick==="number"){this.spin=(tick==0)?0:(this.spin+tick)}else{var t=1/this.fps;var s=2;if(this.spin==0){this.spin=(tick=="up")?t:-t}else{if(Math.abs(this.spin)<1){s*=2}if(this.spin>0){this.spin=(tick=="up")?(this.spin*s):(this.spin/s)}else{if(this.spin<0){this.spin=(tick=="up")?(this.spin/s):(this.spin*s)}}if(this.spin<t&&this.spin>-t){this.spin=0}}}if(this.interval_time!==undefined){clearInterval(this.interval_time)}if(this.spin!=0){this.advanceTime(this.spin,wait)}return this};VirtualSky.prototype.getOffset=function(el){var _x=0;var _y=0;while(el&&!isNaN(el.offsetLeft)&&!isNaN(el.offsetTop)){_x+=el.offsetLeft-el.scrollLeft;_y+=el.offsetTop-el.scrollTop;el=el.parentNode}return{top:_y,left:_x}};VirtualSky.prototype.getJD=function(clock){if(!clock){clock=this.clock}return(clock.getTime()/86400000)+2440587.5};VirtualSky.prototype.getNegative=function(colour){var end=(colour.indexOf("rgb")==0)?(colour.lastIndexOf(")")):0;if(end==0){return colour}var rgb=colour.substring(colour.indexOf("(")+1,end).split(",");return(rgb.length==3)?("rgb("+(255-rgb[0])+","+(255-rgb[1])+","+(255-rgb[2])+")"):("rgba("+(255-rgb[0])+","+(255-rgb[1])+","+(255-rgb[2])+","+(rgb[3])+")")};VirtualSky.prototype.greatCircle=function(l1,d1,l2,d2){return Math.acos(Math.cos(d1)*Math.cos(d2)*Math.cos(l1-l2)+Math.sin(d1)*Math.sin(d2))};VirtualSky.prototype.bind=function(ev,fn){if(typeof ev!=="string"||typeof fn!=="function"){return this}if(this.events[ev]){this.events[ev].push(fn)}else{this.events[ev]=[fn]}return this};VirtualSky.prototype.trigger=function(ev,args){if(typeof ev!=="string"){return}if(typeof args!=="object"){args={}}var o=[];var _obj=this;if(typeof this.events[ev]==="object"){for(i=0;i<this.events[ev].length;i++){if(typeof this.events[ev][i]==="function"){o.push(this.events[ev][i].call(_obj,args))}}}if(o.length>0){return o}};function convertTZ(s){function formatHour(h){var s=(h>=0?"+":"-");h=Math.abs(h);var m=(h-Math.floor(h))*60;var h=Math.floor(h);return s+(h<10?"0"+h:h)+(m<10?"0"+m:m)}var tzs={A:1,ACDT:10.5,ACST:9.5,ADT:-3,AEDT:11,AEST:10,AKDT:-8,AKST:-9,AST:-4,AWST:8,B:2,BST:1,C:3,CDT:-5,CEDT:2,CEST:2,CET:1,CST:-6,CXT:7,D:4,E:5,EDT:-4,EEDT:3,EEST:3,EET:2,EST:-5,F:6,G:7,GMT:0,H:8,HAA:-3,HAC:-5,HADT:-9,HAE:-4,HAP:-7,HAR:-6,HAST:-10,HAT:-2.5,HAY:-8,HNA:-4,HNC:-6,HNE:-5,HNP:-8,HNR:-7,HNT:-3.5,HNY:-9,I:9,IST:9,IST:1,JST:9,K:10,L:11,M:12,MDT:-6,MESZ:2,MEZ:1,MST:-7,N:-1,NDT:-2.5,NFT:11.5,NST:-3.5,O:-2,P:-3,PDT:-7,PST:-8,Q:-4,R:-5,S:-6,T:-7,U:-8,UTC:0,UT:0,V:-9,W:-10,WEDT:1,WEST:1,WET:0,WST:8,X:-11,Y:-12,Z:0};var i=s.lastIndexOf(" ");if(i>0&&tzs[s.substr(i+1)]){return s.substring(0,i)+" "+formatHour(tzs[s.substr(i+1)])}return s}$.virtualsky=function(placeholder,input){if(typeof input==="object"){input.container=placeholder}else{if(typeof placeholder==="string"){input={container:placeholder}}else{input=placeholder}}input.plugins=$.virtualsky.plugins;return new VirtualSky(input)};$.virtualsky.plugins=[]})(jQuery);