mirror of https://github.com/espruino/BangleApps
planetarium
Pablo Gonzalez
parent
bd882648f5
commit
6b407f10b9
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@ -49,93 +49,122 @@ function binary_search(a, value) {
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return null;
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}
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var longitudeSign = 1; //1 for west and -1 for east;
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var longitudeDegrees = 5;
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var longitudeMinutes = 37;
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var longitudeSeconds = 27.4;
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var longitude = toRadians(longitudeSign * (longitudeDegrees + longitudeMinutes / 60 + longitudeSeconds / 3600));
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var latitudeSign = 1; //1 for north -1 for south;
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var latitudeDegrees = 43;
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var latitudeMinutes = 25;
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var latitudeSeconds = 0.9;
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var latitude = toRadians(latitudeSign * (latitudeDegrees + latitudeMinutes / 60 + latitudeSeconds / 3600));
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var year = 2020;
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var month = 1;
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var day = 27;
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var hours = 22;
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var minutes = 0;
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var seconds = 0;
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var timeZone = 1;
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var julianDay = toJulianDay(year, month, day, hours - timeZone, minutes, seconds);
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var size = 240;
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function drawStars(lat,lon,date){
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var longitude = toRadians(-lon);
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var latitude = toRadians(lat);
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storage = require('Storage');
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f=storage.read("planetarium.data.csv","r");
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linestart=0;
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g.clearRect(0, 0, 240, 240);
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var julianDay = toJulianDay(date.getFullYear(), date.getMonth()+1,date.getDate(),
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date.getHours() + date.getTimezoneOffset() / 60,
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date.getMinutes(), date.getSeconds());
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var size = 240;
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//Common calculations based only on time
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var t = (julianDay - 2451545.0) / 36525;
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var zeta = toRadians((2306.2181 * t + 0.30188 * t * t + 0.017998 * t * t * t) / 3600);
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var theta = toRadians((2004.3109 * t - 0.42665 * t * t - 0.041833 * t * t * t) / 3600);
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var z = toRadians((2306.2181 * t + 1.09468 * t * t + 0.018203 * t * t * t) / 3600);
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storage = require('Storage');
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f=storage.read("planetarium.csv","r");
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linestart=0;
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g.clear();
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//Common calculations based only on time
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var t = (julianDay - 2451545.0) / 36525;
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var zeta = toRadians((2306.2181 * t + 0.30188 * t * t + 0.017998 * t * t * t) / 3600);
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var theta = toRadians((2004.3109 * t - 0.42665 * t * t - 0.041833 * t * t * t) / 3600);
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var z = toRadians((2306.2181 * t + 1.09468 * t * t + 0.018203 * t * t * t) / 3600);
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let starNumber = 0;
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//Each star has a number (the position on the file (line number)). These are the lines
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//joining each star in the constellations.
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constelation_lines=[/*Orion*/[7,68],[10,53],[53,56],[28,68],/*Taurus*/[13,172],[13,340],[293,340],[29,293],
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/*canis menor*/[155,8]];
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var starPositions = {};
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let starNumber = 0;
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//Each star has a number (the position on the file (line number)). These are the lines
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//joining each star in the constellations.
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constelation_lines=[/*Orion*/[7,68],[10,53],[53,56],[28,68],/*Taurus*/[13,172],[13,340],[293,340],[29,293],
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/*canis menor*/[155,8]];
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var starPositions = {};
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for (i=0;i<f.length;i++)
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{
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if (f[i]=='\n'){
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var start = new Date().getTime();
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starNumber++;
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//console.log("Line from "+linestart.toString()+"to "+(i-1).toString());
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line = f.substr(linestart,i-linestart);
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//console.log(line);
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linestart = i+1;
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//Process the star
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starInfo = line.split(',');
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//console.log(starInfo[0]);
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starRA = parseFloat(starInfo[0]);
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starDE = parseFloat(starInfo[1]);
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starMag = parseFloat(starInfo[2]);
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//var start = new Date().getTime();
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var dec = Math.asin(Math.sin(theta) * Math.cos(starDE) * Math.cos(starRA + zeta) + Math.cos(theta) * Math.sin(starDE));
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var ascen = Math.atan2(Math.cos(starDE) * Math.sin(starRA + zeta), Math.cos(theta) * Math.cos(starDE) * Math.cos(starRA + zeta) - Math.sin(theta) * Math.sin(starDE)) + z;
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var H = siderealTime(julianDay) - longitude - ascen;
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//var end = new Date().getTime();
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//console.log("Call to doSomething took " + (end - start) + " milliseconds.");
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//Compute altitude
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var alt = Math.asin(Math.sin(latitude) * Math.sin(dec) + Math.cos(latitude) * Math.cos(dec) * Math.cos(H));
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if(alt >= 0)
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{
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//Compute azimuth
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var azi = Math.atan2(Math.sin(H), Math.cos(H) * Math.sin(latitude) - Math.tan(dec) * Math.cos(latitude));
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var x = size / 2 + size / 2 * Math.cos(alt) * Math.sin(azi);
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var y = size / 2 + size / 2 * Math.cos(alt) * Math.cos(azi);
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starPositions[starNumber] = [x,y];
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var magnitude = starMag<1.5?2:1;
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g.fillCircle(x, y, magnitude);
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if (starMag<1)
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g.drawString(starInfo[3],x,y+2);
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g.flip();
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for (i=0;i<f.length;i++)
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{
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if (f[i]=='\n'){
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var start = new Date().getTime();
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starNumber++;
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//console.log("Line from "+linestart.toString()+"to "+(i-1).toString());
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line = f.substr(linestart,i-linestart);
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//console.log(line);
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linestart = i+1;
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//Process the star
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starInfo = line.split(',');
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//console.log(starInfo[0]);
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starRA = parseFloat(starInfo[0]);
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starDE = parseFloat(starInfo[1]);
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starMag = parseFloat(starInfo[2]);
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//var start = new Date().getTime();
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var dec = Math.asin(Math.sin(theta) * Math.cos(starDE) * Math.cos(starRA + zeta) + Math.cos(theta) * Math.sin(starDE));
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var ascen = Math.atan2(Math.cos(starDE) * Math.sin(starRA + zeta), Math.cos(theta) * Math.cos(starDE) * Math.cos(starRA + zeta) - Math.sin(theta) * Math.sin(starDE)) + z;
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var H = siderealTime(julianDay) - longitude - ascen;
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//var end = new Date().getTime();
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//console.log("Call to doSomething took " + (end - start) + " milliseconds.");
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//Compute altitude
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var alt = Math.asin(Math.sin(latitude) * Math.sin(dec) + Math.cos(latitude) * Math.cos(dec) * Math.cos(H));
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if(alt >= 0)
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{
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//Compute azimuth
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var azi = Math.atan2(Math.sin(H), Math.cos(H) * Math.sin(latitude) - Math.tan(dec) * Math.cos(latitude));
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var x = size / 2 + size / 2 * Math.cos(alt) * Math.sin(azi);
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var y = size / 2 + size / 2 * Math.cos(alt) * Math.cos(azi);
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starPositions[starNumber] = [x,y];
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var magnitude = starMag<1.5?2:1;
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g.fillCircle(x, y, magnitude);
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if (starMag<1)
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g.drawString(starInfo[3],x,y+2);
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g.flip();
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}
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}
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}
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for (i=0;i<constelation_lines.length;i++)
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{
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constelation = constelation_lines[i];
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positionStar1=starPositions[constelation[0]];
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positionStar2=starPositions[constelation[1]];
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//Both stars need to be visible
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g.setColor(0,255,0);
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if (positionStar1 && positionStar2)
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g.drawLine(positionStar1[0],positionStar1[1],positionStar2[0],positionStar2[1]);
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g.flip();
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}
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}
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for (i=0;i<constelation_lines.length;i++)
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{
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constelation = constelation_lines[i];
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positionStar1=starPositions[constelation[0]];
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positionStar2=starPositions[constelation[1]];
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//Both stars need to be visible
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g.setColor(0,255,0);
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if (positionStar1 && positionStar2)
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g.drawLine(positionStar1[0],positionStar1[1],positionStar2[0],positionStar2[1]);
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g.flip();
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}
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Bangle.setGPSPower(1);
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var gps = { fix : 0};
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var gpsCount = 0;
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var prevSats = 0;
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g.clear();
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g.setFontAlign(0,0);
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Bangle.on('GPS',function(gp) {
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date = new Date();
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gps = gp;
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gpsCount++;
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if (gp.fix) {
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lat = gp.lat;
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lon = gp.lon;
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Bangle.setGPSPower(0);
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drawStars(lat,lon,date);
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} else {
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g.setFont("Vector",20);
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g.drawString("Waiting for position",120,120);
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g.setFont("Vector",15);
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if (gp.satellites>prevSats || prevSats===0){
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prevSats = gp.satellites;
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g.clearRect(0,150,240,180);
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g.drawString("Got "+gp.satellites+" satellites",120,160);
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}
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g.clearRect(0,180,240,220);
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g.drawString("GMT:"+(date.getHours()+date.getTimezoneOffset() / 60)+":"+date.getMinutes()+":"+date.getSeconds(),120,200);
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g.drawString(date.getDate()+'/'+date.getMonth()+1+"/"+date.getFullYear(),120,215);
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g.flip();
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}
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});
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