Gordon Williams
GitHub
commit
cfb7243c91
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@ -2698,8 +2698,8 @@
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"name": "Planetarium",
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"shortName":"Planetarium",
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"icon": "planetarium.png",
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"version":"0.01",
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"description": "Planetarium showing up to 350 stars using the watch location and time",
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"version":"0.02",
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"description": "Planetarium showing up to 500 stars using the watch location and time",
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"tags": "",
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"storage": [
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{"name":"planetarium.app.js","url":"planetarium.app.js"},
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@ -0,0 +1,2 @@
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0.01: New App!
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0.02: Major speed improvement. Added more stars. Up to 500!
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@ -2,10 +2,18 @@
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This planetarium takes your position and time and plots the sky as it is.
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No planets, or moon, only stars. It can show the 350 most brilliant stars in the sky.
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No planets, or moon, only stars. It can show the 500 most brilliant stars in the sky.
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Plan is to show also constellations, but this is work in progress. Now it shows Taurus and Orion as examples.
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I think code is quite optimized already. It runs as fast as I could make it run. If someone has some ideas to speed it up, I could plot more stars.
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Basic equations to compute declination and right ascension for stars where taken from this [github repo](https://github.com/Michi83/planetarium).
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Basic equations to compute declination and right ascension for stars where taken from this [github repo](https://github.com/Michi83/planetarium). Thanks!
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## How to use
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The planetarium plots the stars as if you are looking to the sky (with your watch screen pointing downwards). This means, if you have the watch in your wrist, you have to look south to see the stars matching. If you want to look north, just take out the watch from your wrist and make a 180º turn.
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## Improvements
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I plan to add more constellations as soon as I have time. I am adding the constellations that I know of, but the plan is to add all the main ones (at least for North Hemisphere).
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Please note that the watch hardware is limited and computing the stars positions is a quite intensive task for this little processor. This is why it plots only stars and no planets or the moon. For plotting the planets, storage will be a limiting factor as well as computing the position for planets needs more initial data compared with stars.
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@ -46,7 +46,6 @@ function drawStars(lat,lon,date){
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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.clear();
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//Common calculations based only on time
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@ -59,48 +58,62 @@ function drawStars(lat,lon,date){
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let starNumber = 0;
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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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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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//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 && settings.starnames)
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g.drawString(starInfo[3],x,y+2);
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g.flip();
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var line,linestart = 0;
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lineend = f.indexOf("\n");
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while (lineend>=0) {
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line = f.substring(linestart,lineend);
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starNumber++;
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//console.log(line);
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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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//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?2:1;
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//Stars between 1.5 and 4 magnitude should get a different colour
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var col=1;
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if (starMag<=1.5)
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col=1;
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else if (starMag>1.5 && starMag<2)
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col=0.9;
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else if (starMag>=2 && starMag<3)
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col=0.7;
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else if (starMag>=3 && starMag<3.5)
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col=0.5;
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else
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col=0.3;
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g.setColor(col,col,col);
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g.fillCircle(x, y, magnitude);
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if (starMag<1 && settings.starnames)
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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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linestart = lineend+1;
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lineend = f.indexOf("\n",linestart);
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}
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if (settings.constellations){
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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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constelations=[[[7,68],[10,53],[53,56],[28,68],"Orion"],[[13,172],[13,340],[293,340],[29,293],"Taurus"],
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[[155,8],"Canis Menor"],[[36,81],[87,81],[235,87],[33,235],[33,75],[75,40],"Ursa Major"],[[67,91],[74,67],[91,110],[110,252],"Cassiopeia"],[[23,166],[16,294],[294,44],[166,149],[230,149],[16,23],"Gemini"]];
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[[155,8],"Canis Menor"],[[36,81],[87,81],[235,87],[33,235],[33,75],[75,40],[36,235],"Ursa Major"],[[67,91],[74,67],[91,110],[110,252],"Cassiopeia"],[[23,166],[16,294],[294,44],[166,149],[230,149],[16,23],"Gemini"],[[88,218],[215,292],[218,292],[245,88],[292,245],[215,218],"Cepheus"],[[150,62],[150,175],[175,35],[403,62],[487,158],[384,487],[384,158],[35,158],[487,403],"Perseus"],[[19,65],[65,90],[65,147],[466,65],[466,189],[147,401],[213,90],"Cygnus"],[[6,42],[168,6],[168,113],[113,29],[104,29],[104,42],"Auriga"],[[1,47],[1,37],[37,22],[22,178],[37,89],"Can Maior"],[[3,118],[118,279],[279,286],[286,180],[180,316],[316,3],"Bootes"]];
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g.setColor(0,255,0);
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for (i=0;i<constelations.length;i++)
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{
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@ -119,7 +132,7 @@ function drawStars(lat,lon,date){
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g.flip();
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}
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//Write the name
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if (constelationShowing)
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if (constelationShowing && settings.consnames)
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g.drawString(constelations[i][constelations[i].length-1],positionStar2[0]+10,positionStar2[1]);
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}
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}
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@ -132,7 +145,7 @@ var prevSats = 0;
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g.clear();
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var settings = require('Storage').readJSON('planetarium.json',1)||
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{ starnames:false,constellations:true};
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{ starnames:false,constellations:true,consnames:false};
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g.setFontAlign(0,0);
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@ -143,7 +156,8 @@ Bangle.on('GPS',function(gp) {
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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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setTimeout(function() {
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drawStars(lat,lon,new Date());},0);
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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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@ -47,7 +47,7 @@
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1.670,-0.313,2.0,BE CMA
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2.477,-0.151,2.0,AL HYA
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0.555,0.409,2.0,AL ARI
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0.663,1.558,2.0,AL UMI
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0.663,1.558,2.0,Polaris
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4.954,-0.459,2.0,SI SGR
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0.190,-0.314,2.0,BE CET
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1.487,-0.034,2.0,ZE ORI
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@ -340,4 +340,161 @@
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1.134,0.273,3.6,GA TAU
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3.323,-0.025,3.6,GA VIR
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3.684,1.124,3.6,AL DRA
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5.475,-1.020,3.6,BE IND
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5.475,-1.020,3.6,BE IND
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0.161,0.941,3.7,ZE CAS
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1.462,0.173,3.7,LA ORI
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4.096,-0.520,3.7,TA LIB
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4.741,-0.874,3.7,TH ARA
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6.063,-0.370,3.7,88 AQR
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2.494,1.101,3.7,23 UMA
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4.129,0.269,3.7,BE SER
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2.285,-0.579,3.7,AL PYX
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3.323,-0.025,3.7,GA VIR
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4.048,0.508,3.7,BE CRB
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5.673,-0.291,3.7,GA CAP
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0.871,-0.380,3.7,TA4 ERI
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1.271,0.098,3.7,PI4 ORI
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2.554,-1.091,3.7,_
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6.096,0.057,3.7,GA PSC
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0.506,-0.901,3.7,CH ERI
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0.981,0.421,3.7,17 TAU
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4.703,0.510,3.7,XI HER
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1.555,-0.247,3.7,ET LEP
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3.081,0.834,3.7,CH UMA
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4.149,0.078,3.7,EP SER
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5.216,0.112,3.7,BE AQL
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1.284,0.043,3.7,PI5 ORI
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1.569,0.947,3.7,DE AUR
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3.867,0.033,3.7,109 VIR
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5.519,0.767,3.7,XI CYG
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5.562,0.664,3.7,TA CYG
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0.486,-0.180,3.7,ZE CET
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0.929,-0.165,3.7,EP ERI
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2.060,-0.708,3.7,_
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4.744,0.167,3.7,72 OPH
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0.904,0.170,3.7,XI TAU
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5.614,-0.391,3.7,ZE CAP
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5.989,-0.132,3.7,LA AQR
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1.320,0.717,3.8,ZE AUR
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2.374,-0.822,3.8,_
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4.284,0.334,3.8,GA HER
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4.660,0.047,3.8,GA OPH
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4.684,0.993,3.8,XI DRA
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5.887,1.020,3.8,DE CEP
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0.745,0.976,3.8,ET PER
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1.147,0.306,3.8,DE1 TAU
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1.456,-1.091,3.8,BE DOR
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4.406,-1.030,3.8,ET ARA
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5.679,-1.351,3.8,NY OCT
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5.790,0.442,3.8,JO PEG
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0.983,0.743,3.8,NY PER
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2.207,-1.154,3.8,BE VOL
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4.995,-0.379,3.8,OK SGR
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5.049,0.931,3.8,KA CYG
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5.409,0.278,3.8,AL DEL
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5.444,-0.166,3.8,EP AQR
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5.896,0.878,3.8,AL LAC
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1.871,-1.230,3.8,GA2 VOL
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2.851,-1.027,3.8,_
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1.851,0.359,3.8,ZE GEM
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1.945,0.485,3.8,JO GEM
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5.104,0.903,3.8,JO2 CYG
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5.295,0.816,3.8,31 CYG
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0.827,0.783,3.8,KA PER
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2.579,1.030,3.8,YP UMA
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2.705,0.346,3.8,GA2 LEO
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4.079,0.184,3.8,DE SER
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4.079,0.184,3.8,DE SER
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4.623,0.803,3.8,JO HER
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1.478,-0.045,3.8,SI ORI
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1.533,-0.364,3.8,DE LEP
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2.732,-0.294,3.8,MY HYA
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1.202,-0.533,3.8,YP2 ERI
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2.438,0.642,3.8,38 LYN
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2.740,-1.025,3.8,_
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4.324,0.035,3.8,LA OPH
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5.181,0.323,3.8,DE SGE
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6.185,0.811,3.8,LA AND
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0.979,0.564,3.8,OK PER
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2.851,0.597,3.8,46 LMI
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3.658,-0.735,3.8,PH CEN
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3.874,-1.380,3.8,AL APS
|
||||
4.745,0.502,3.8,OK HER
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||||
5.184,1.226,3.8,EP DRA
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||||
1.172,0.279,43.8,TH1 TAU
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||||
2.272,-0.814,3.8,_
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||||
2.335,-1.058,3.8,_
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||||
2.781,-0.842,3.8,_
|
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3.017,1.210,3.8,LA DRA
|
||||
4.113,0.459,3.8,GA CRB
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||||
4.816,0.380,3.8,109 HER
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||||
5.854,-0.024,3.8,GA AQR
|
||||
0.978,-1.131,3.8,BE RET
|
||||
1.515,-0.891,3.8,BE PIC
|
||||
1.667,-0.584,3.8,DE COL
|
||||
1.897,-0.467,3.8,OM CMA
|
||||
2.682,-0.735,3.8,_
|
||||
2.761,0.162,3.8,RH LEO
|
||||
4.173,0.273,3.8,GA SER
|
||||
4.256,-1.112,3.8,DE TRA
|
||||
4.866,-0.144,3.8,AL SCT
|
||||
1.108,-0.738,3.9,AL HOR
|
||||
3.306,-0.847,3.9,TA CEN
|
||||
4.696,0.650,3.9,TH HER
|
||||
4.772,-0.368,3.9,MY SGR
|
||||
0.248,0.672,3.9,MY AND
|
||||
0.838,-0.506,3.9,AL FOR
|
||||
0.985,0.425,3.9,20 TAU
|
||||
1.214,-0.250,3.9,53 ERI
|
||||
1.445,-0.619,3.9,EP COL
|
||||
1.807,-0.422,3.9,OK1 CMA
|
||||
3.283,-1.259,3.9,GA MUS
|
||||
3.288,1.218,3.9,KA DRA
|
||||
3.659,-0.782,3.9,YP1 CEN
|
||||
3.979,-0.851,3.9,KA1 LUP
|
||||
0.041,-0.798,3.9,EP PHE
|
||||
2.419,0.040,3.9,TH HYA
|
||||
2.586,0.454,3.9,MY LEO
|
||||
3.539,-0.688,3.9,_
|
||||
3.853,-0.099,3.9,MY VIR
|
||||
4.175,-0.510,3.9,RH SCO
|
||||
0.770,-0.155,3.9,ET ERI
|
||||
2.971,-0.951,3.9,PI CEN
|
||||
3.228,-0.012,3.9,ET VIR
|
||||
4.275,0.808,3.9,TA HER
|
||||
4.335,-1.377,3.9,GA APS
|
||||
5.220,0.612,3.9,ET CYG
|
||||
2.206,-0.068,3.9,_
|
||||
5.203,0.018,3.9,ET AQL
|
||||
6.067,-0.790,3.9,JO GRU
|
||||
1.061,0.105,3.9,NY TAU
|
||||
2.295,-0.804,3.9,_
|
||||
2.530,-0.020,3.9,JO HYA
|
||||
2.917,-1.029,3.9,_
|
||||
3.264,-0.877,3.9,SI CEN
|
||||
4.082,-0.258,3.9,GA LIB
|
||||
0.298,-0.964,3.9,ZE PHE
|
||||
4.452,0.540,3.9,EP HER
|
||||
5.567,0.092,3.9,AL EQU
|
||||
1.206,-0.059,3.9,NY ERI
|
||||
2.013,-0.167,3.9,AL MON
|
||||
5.069,-0.311,3.9,RH1 SGR
|
||||
0.114,-0.762,3.9,KA PHE
|
||||
2.289,0.317,3.9,DE CNC
|
||||
2.984,0.184,3.9,JO LEO
|
||||
5.485,0.719,3.9,NY CYG
|
||||
0.398,-0.856,4.0,DE PHE
|
||||
0.760,0.921,4.0,TA PER
|
||||
1.731,-0.336,4.0,NY2 CMA
|
||||
2.015,-1.267,4.0,ZE VOL
|
||||
3.508,0.959,4.0,ZE UMA
|
||||
4.149,-0.587,4.0,CH LUP
|
||||
5.963,0.411,4.0,LA PEG
|
||||
1.152,-0.594,4.0,43 ERI
|
||||
1.567,-0.747,4.0,ET COL
|
||||
1.788,-0.567,4.0,KA CMA
|
||||
2.024,-0.505,4.0,3 PUP
|
||||
3.192,-0.914,4.0,RH CEN
|
||||
4.218,-0.361,4.0,OM1 SCO
|
||||
5.239,-1.273,4.0,EP PAV
|
||||
1.534,0.683,4.0,NY AUR
|
||||
|
|
|
@ -19,7 +19,13 @@
|
|||
format: v =>v?'On':'Off',
|
||||
onchange: v => {
|
||||
save('constellations',v);
|
||||
}
|
||||
}};
|
||||
}},
|
||||
'Const. names': {
|
||||
value: !!settings.consnames,
|
||||
format: v =>v?'On':'Off',
|
||||
onchange: v => {
|
||||
save('consnames',v);
|
||||
}},
|
||||
};
|
||||
E.showMenu(appMenu)
|
||||
})
|
||||
Loading…
Reference in New Issue