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modify how to load the constellations

master
Pablo Gonzalez 2021-02-01 16:05:41 +01:00
parent 19a2f80e5c
commit 360ebcf702
3 changed files with 95 additions and 50 deletions
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1
apps.json
View File

@ -2720,6 +2720,7 @@
"storage": [
{"name":"planetarium.app.js","url":"planetarium.app.js"},
{"name":"planetarium.data.csv","url":"planetarium.data.csv"},
{"name":"planetarium.const.csv","url":"planetarium.const.csv"},
{"name":"planetarium.settings.js","url":"settings.js"},
{"name":"planetarium.img","url":"planetarium-icon.js","evaluate":true}
],

116
apps/planetarium/planetarium.app.js
View File

@ -35,42 +35,11 @@ function siderealTime(julianDay)
return toRadians(280.46061837 + 360.98564736629 * (julianDay - 2451545.0) + 0.000387933 * T * T - T * T * T / 38710000);
}
function drawStars(lat,lon,date){
var longitude = toRadians(-lon);
var latitude = toRadians(lat);
var julianDay = toJulianDay(date.getFullYear(), date.getMonth()+1,date.getDate(),
date.getHours() + date.getTimezoneOffset() / 60,
date.getMinutes(), date.getSeconds());
var size = 240;
storage = require('Storage');
f=storage.read("planetarium.data.csv","r");
g.clear();
//Common calculations based only on time
var t = (julianDay - 2451545.0) / 36525;
var zeta = toRadians((2306.2181 * t + 0.30188 * t * t + 0.017998 * t * t * t) / 3600);
var theta = toRadians((2004.3109 * t - 0.42665 * t * t - 0.041833 * t * t * t) / 3600);
var z = toRadians((2306.2181 * t + 1.09468 * t * t + 0.018203 * t * t * t) / 3600);
let starNumber = 0;
var starPositions = {};
var line,linestart = 0;
lineend = f.indexOf("\n");
while (lineend>=0) {
line = f.substring(linestart,lineend);
starNumber++;
//console.log(line);
//Process the star
starInfo = line.split(',');
//console.log(starInfo[0]);
starRA = parseFloat(starInfo[0]);
starDE = parseFloat(starInfo[1]);
starMag = parseFloat(starInfo[2]);
//var start = new Date().getTime();
/*
* Draws a single star in the sky.
* starPositions is a dictionary that gets modified and it is used later for ploting the constelations
*/
function drawStar(zeta,theta,z,julianDay,latitude,longitude,starDE,starRA,starMag,starNumber,starPositions){
var dec = Math.asin(Math.sin(theta) * Math.cos(starDE) * Math.cos(starRA + zeta) + Math.cos(theta) * Math.sin(starDE));
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;
var H = siderealTime(julianDay) - longitude - ascen;
@ -104,23 +73,72 @@ function drawStars(lat,lon,date){
g.flip();
}
}
function plotSky(lat,lon,date){
var longitude = toRadians(-lon);
var latitude = toRadians(lat);
var julianDay = toJulianDay(date.getFullYear(), date.getMonth()+1,date.getDate(),
date.getHours() + date.getTimezoneOffset() / 60,
date.getMinutes(), date.getSeconds());
storage = require('Storage');
f=storage.read("planetarium.data.csv","r");
g.clear();
//Common calculations based only on time
var t = (julianDay - 2451545.0) / 36525;
var zeta = toRadians((2306.2181 * t + 0.30188 * t * t + 0.017998 * t * t * t) / 3600);
var theta = toRadians((2004.3109 * t - 0.42665 * t * t - 0.041833 * t * t * t) / 3600);
var z = toRadians((2306.2181 * t + 1.09468 * t * t + 0.018203 * t * t * t) / 3600);
let starNumber = 0;
var starPositions = {};
var line,linestart = 0;
lineend = f.indexOf("\n");
while (lineend>=0) {
line = f.substring(linestart,lineend);
starNumber++;
//Process the star
starInfo = line.split(',');
//console.log(starInfo[0]);
starRA = parseFloat(starInfo[0]);
starDE = parseFloat(starInfo[1]);
starMag = parseFloat(starInfo[2]);
drawStar(zeta,theta,z,julianDay,latitude,longitude,starDE,starRA,starMag,starNumber,starPositions);
linestart = lineend+1;
lineend = f.indexOf("\n",linestart);
}
if (settings.constellations){
//Each star has a number (the position on the file (line number)). These are the lines
//joining each star in the constellations.
constelations=[[[7,68],[10,53],[53,56],[28,68],"Orion"],[[13,172],[13,340],[293,340],[29,293],"Taurus"],
[[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"]];
linenum=linestart = 0;
fc=storage.read("planetarium.const.csv","r");
lineend = fc.indexOf("\n");
while (lineend>=0) {
linenum++;
//In this file, each constelation are two lines. The first one the name, the second the lines joining stars
var name = fc.substring(linestart,lineend);
linestart = lineend+1;
lineend = fc.indexOf("\n",linestart);
var lines = fc.substring(linestart,lineend).split(',');
linestart = lineend+1;
lineend = fc.indexOf("\n",linestart);
g.setColor(0,255,0);
for (i=0;i<constelations.length;i++)
{
if (linenum>11)
break;
constelationShowing=false;
for (j=0;j<constelations[i].length-1;j++){
positionStar1=starPositions[constelations[i][j][0]];
positionStar2=starPositions[constelations[i][j][1]];
for (j=0;j<lines.length;j++){
positions = lines[j].split(' ');
positionStar1=starPositions[parseInt(positions[0])];
positionStar2=starPositions[parseInt(positions[1])];
//Both stars need to be visible
if (positionStar1 && positionStar2)
{
@ -132,12 +150,14 @@ function drawStars(lat,lon,date){
g.flip();
}
//Write the name
if (constelationShowing && settings.consnames)
g.drawString(constelations[i][constelations[i].length-1],positionStar2[0]+10,positionStar2[1]);
if (constelationShowing && true)
g.drawString(name,positionStar2[0]+10,positionStar2[1]);
}
}
}
const size = 240; //Bangle size screen
Bangle.setGPSPower(1);
var gps = { fix : 0};
@ -157,7 +177,7 @@ Bangle.on('GPS',function(gp) {
lon = gp.lon;
Bangle.setGPSPower(0);
setTimeout(function() {
drawStars(lat,lon,new Date());},0);
plotSky(lat,lon,new Date());},0);
} else {
g.setFont("Vector",20);
g.drawString("Waiting for position",120,120);

24
apps/planetarium/planetarium.const.csv Normal file
View File

@ -0,0 +1,24 @@
Orion
7 68,10 53,53 56,28 68
Taurus
13 172,13 340,293 340,29 293
Canis Menor
155 8
Ursa Major
36 81,87 81,235 87,33 235,33 75,75 40,36 235
Cassiopeia
67 91,74 67,91 110,110 252
Gemini
23 166,16 294,294,44,166 149,230 149,16 23
Cepheus
88 218,215 292,218 292,245 88,292 245,215 218
Perseus
150 62,150 175,175 35,403 62,487 158,384 487,384 158,35 158,487 403
Cygnus
19 65,65 90,65 147,466 65,466 189,147 401,213 90
Auriga
6 42,168 6,168 113,113 29,104 29,104 42
Can Maior
1 47,1 37,37 22,22 178,37 89
Bootes
3 118,118 279,279 286,286 180,180 316,316 3
1 Orion
2 7 68,10 53,53 56,28 68
3 Taurus
4 13 172,13 340,293 340,29 293
5 Canis Menor
6 155 8
7 Ursa Major
8 36 81,87 81,235 87,33 235,33 75,75 40,36 235
9 Cassiopeia
10 67 91,74 67,91 110,110 252
11 Gemini
12 23 166,16 294,294,44,166 149,230 149,16 23
13 Cepheus
14 88 218,215 292,218 292,245 88,292 245,215 218
15 Perseus
16 150 62,150 175,175 35,403 62,487 158,384 487,384 158,35 158,487 403
17 Cygnus
18 19 65,65 90,65 147,466 65,466 189,147 401,213 90
19 Auriga
20 6 42,168 6,168 113,113 29,104 29,104 42
21 Can Maior
22 1 47,1 37,37 22,22 178,37 89
23 Bootes
24 3 118,118 279,279 286,286 180,180 316,316 3