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scripts.js
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/*** scripts.js - Main LEO View / JoEmbedded.de ***/
import * as THREE from './modules/three.module.min.js';
import {
OrbitControls
} from './modules/OrbitControls.js';
import * as dat from './modules/dat.gui.module.js';
import * as haloglow from './haloglow.js';
import {
initJot3,
orbit,
ambientLight,
scene,
camera,
cameraHome,
renderer,
gui,
guiTerminal,
guiTerminalShow,
guiTerminalClear,
cartesian2Polar,
} from './t3helpers.js';
import * as TLE from './tleloader.js'
//--- Images ---
const backgroundImage = './img/night-sky.jpg'
const globeImg = './img/earth-jo.jpg'; // Earth
// --- Defines ---
const EARTH_RADIUS_KM = 6371 // km (== 1 UNIT)
// --- Globals ---
var altitudeKm = 0 // Altitude of camera opt
const groupSatellites = new THREE.Group(); // List of displayed satellites
const groupTrajectories = new THREE.Group(); // List of Trajectories
// --- Functions ---
function genEarth() { // Earth
const earthTexture = new THREE.TextureLoader().load(globeImg);
const earthGemoatry = new THREE.SphereGeometry(1, 50, 50);
const earthMaterial = new THREE.MeshBasicMaterial({
map: earthTexture
});
const sphereEarth = new THREE.Mesh(earthGemoatry, earthMaterial);
sphereEarth.name = "Earth"
sphereEarth.rotateY(-Math.PI / 2)
sphereEarth.position.set(0, 0, 0)
scene.add(sphereEarth);
const haloEarth = haloglow.createGlowMesh(earthGemoatry, {
backside: true,
color: '#F0FFFF',
size: 0.05,
power: 5, // dispersion
coefficient: 0.5
});
scene.add(haloEarth);
}
// Monitor Camera Movement
var lastCamPos
function monitorView() {
lastCamPos = new THREE.Vector3(camera.position) // Last Cam Pos
orbit.addEventListener("change", () => {
const e = camera.position;
const d = e.distanceTo({
x: 0,
y: 0,
z: 0
})
altitudeKm = ((d - 1) * EARTH_RADIUS_KM)
// guiTerminal("Alt(km): " + altitudeKm.toFixed(0))
// console.log("ALt(d): ",d)
if (d < 1.2 || d > 6) { // EARTH RADs
camera.position.copy(lastCamPos)
} else {
lastCamPos.copy(e)
}
});
}
/* Select and Show */
function selectSats() {
const anz = TLE.buildSelectedSatList(appopt.searchmask)
guiTerminal("No of Satellites matching '" + appopt.searchmask + "': " + anz);
for (let i = 0; i < anz; i++) {
const ava = guiTerminal(i + ": '" + TLE.SelSatList[i].name + "'")
if (ava < 3 && (anz - i) > 1) {
guiTerminal("... and " + (anz - i) + " more")
break
}
}
}
//--- App Options ---
var cdate_ts = Date.now() // Current timestamp starts with NOW
const appopt = {
searchmask: 'astrocast,spacebee',
puksize: 0.03, // rel to Earth (0.01: 60km!)
earthcircle: 900, // 600km->1 Rad
expfspeed: 2, // Exponentional Fspeed
fspeed: 10, // *implizit* berechnet! (+/-10^expfspeed)
propsec: 0, // 5500: ca 1 Cycle Propagation lenth in sec (if >0)
showbackimg: true,
}
var appdgsearch;
var appdgprop;
var needsprop = false;
// Load LEO Data
async function tleSetup() {
await TLE.loadTLEList()
guiTerminal("Loaded " + TLE.SatList.length + " LEO Satellites")
selectSats(false) // NoClear Terminal
populateSatellites()
needsprop = true;
appdgsearch.onChange(() => {
// console.log(appopt.searchmask)
guiTerminalClear(); // Clear Terminal
selectSats();
populateSatellites()
needsprop = true;
})
appdgprop.onChange(() => {
needsprop = true;
})
}
function genPuk(fnamepuk) {
const dpuktex = new THREE.TextureLoader().load(fnamepuk);
const dpukm = new THREE.SpriteMaterial({
map: dpuktex,
transparent: true,
depthWrite: false
});
return dpukm
}
const pukMStandard = genPuk('./img/puk_256.png'); // PNG: transparent // Standard Gray PUK
const pukMSpacebee = genPuk('./img/puk_sb_256.png'); // PNG: transparent // Standard Gray PUK
const pukMAstrocast = genPuk('./img/puk_astrocast_256.png'); // PNG: transparent // Standard Gray PUK
const pukMStarlink = genPuk('./img/puk_starlink_256.png'); // PNG: transparent // Standard Gray PUK
const pukFlock = genPuk('./img/puk_flock_256.png');
const pukFossa = genPuk('./img/puk_fossa_256.png');
const pukGlobalstar = genPuk('./img/puk_globalstar_256.png');
const pukIridium = genPuk('./img/puk_iridium_256.png');
const pukIss = genPuk('./img/puk_iss_256.png');
const pukOneweb = genPuk('./img/puk_oneweb_256.png');
const pukOrbcomm = genPuk('./img/puk_orbcomm_256.png');
function selpuk(name) {
if (name.toLowerCase().startsWith("spacebee")) return pukMSpacebee
if (name.toLowerCase().startsWith("astrocast")) return pukMAstrocast
if (name.toLowerCase().startsWith("starlink")) return pukMStarlink
if (name.toLowerCase().startsWith("flock")) return pukFlock
if (name.toLowerCase().startsWith("fossa")) return pukFossa
if (name.toLowerCase().startsWith("globalstar")) return pukGlobalstar
if (name.toLowerCase().startsWith("iridium")) return pukIridium
if (name.toLowerCase().startsWith("iss")) return pukIss
if (name.toLowerCase().startsWith("css")) return pukIss
if (name.toLowerCase().startsWith("oneweb")) return pukOneweb
if (name.toLowerCase().startsWith("orbcomm")) return pukOrbcomm
return pukMStandard
}
const lineMaterialTrack = new THREE.LineBasicMaterial({
color: 'red',
transparent: true,
opacity: 0.6
});
const lineMaterialRadial = new THREE.LineBasicMaterial({
color: 'fuchsia',
transparent: true,
opacity: 1
});
const lineMaterialCircle = new THREE.LineBasicMaterial({
color: 'orange',
transparent: true,
opacity: 0.7
});
// Build Trajektory for rec anz steps per sec
function trajektorie(t0, sr, anz, msec) {
let points = [];
for (let i = 0; i < anz; i++) {
const tdate = new Date(t0 + i * msec)
const hpos = TLE.calcSrPositionEci(sr, tdate)
if (hpos == undefined) return
var rad = 0.995 + (hpos.alt / EARTH_RADIUS_KM)
const tr = new THREE.Vector3(0, 0, rad).applyEuler(new THREE.Euler(-hpos.lat, hpos.lng, 0, 'YXZ'))
points.push(tr);
}
return new THREE.BufferGeometry().setFromPoints(points)
}
// GroundDirectedLine
function lineRadHL(radh, radl) {
let points = [];
points.push(new THREE.Vector3(0,0,radl));
points.push(new THREE.Vector3(0,0,radh));
return new THREE.Line(new THREE.BufferGeometry().setFromPoints(points), lineMaterialRadial)
}
const CANZSEG = 30 // Anzahl Segments Standardkreis
function circleObj(rad, height, mat = lineMaterialCircle) {
let rstep = Math.PI * 2 / CANZSEG
let points = [];
for (let i = 0; i < Math.PI * 2; i += rstep) {
points.push(new THREE.Vector3(rad * Math.sin(i), rad * Math.cos(i), height));
}
points.push(points[0])
return new THREE.Line(new THREE.BufferGeometry().setFromPoints(points), mat)
}
const TRACKRES = 100 // 100 sec/Track-Einheit
// Fill/Remove Tracks
function populateTracks() {
groupTrajectories.clear();
TLE.SatList.forEach((e) => { // Fur alle Sats
if (e.track != null) {
e.track.dispose(); // Geometrie entfernen
e.track = null;
}
})
if (appopt.propsec > 0) {
const nd = new Date(cdate_ts)
guiTerminal("Prop. Date: " + nd.toUTCString());
TLE.SelSatList.forEach((e) => {
if (needsprop == true) return; // Noch was in Arbeit
var anzsteps = appopt.propsec / TRACKRES
if (anzsteps >= 2) { // Min. fuer Linie
if (TLE.SelSatList.length > 200 && anzsteps > 3) anzsteps = 3
const tr = trajektorie(cdate_ts, e.sr, anzsteps, TRACKRES * 1000)
if (tr !== undefined) {
const hobj = new THREE.Object3D();
const hline = new THREE.Line(tr, lineMaterialTrack)
hobj.add(hline)
groupTrajectories.add(hobj)
e.track = tr
}
}
})
}
}
// Add to groupSatellites - make visible
function populateSatellites() {
// Remove visible Elements form rendering (but not disposed)
groupSatellites.clear();
const er = appopt.earthcircle / EARTH_RADIUS_KM
const wi = Math.atan(er)
const err = Math.sqrt(1 - er * er)
for (let i = 0; i < TLE.SelSatList.length; i++) {
const ses = TLE.SelSatList[i];
var nSat = ses.sat3Obj
var nSprite = ses.sat3ObjSprite
if (nSat == null) {
nSprite = new THREE.Sprite(selpuk(ses.name));
nSprite.position.set(0, 0, 1) // Direct on Earth
nSat = new THREE.Object3D() // Center Obj
nSat.add(nSprite) // [0]!
/* A GND-directing-Line */
//const nl = lineRadHL(1.2,1.1)
//nSat.add(nl)
const cl = circleObj(1.003, 1.003) // Height via position.z or here
//cl.scale.x = 0.1; cl.scale.y = 0.05; cl.position.z = 1.05
nSat.add(cl)
ses.sat3Obj = nSat
ses.sat3ObjSprite = nSprite
}
const h = nSat.children[1]
h.scale.set(er, er, err)
h.visible = er > 0
nSprite.name = "s" + i // Name is Index in SelList
nSprite.scale.set(appopt.puksize, appopt.puksize)
groupSatellites.add(nSat);
}
// Now visSats ready
}
// Mouse-Functions
const mousePosition = new THREE.Vector2();
const rayCaster = new THREE.Raycaster();
const groundObj = new circleObj(0.05,1.003,lineMaterialRadial); // new lineRadHL(1,1.1);
var gndlineadded = false;
function initMouse() {
window.addEventListener('mousedown', (e) => {
mousePosition.x = (e.clientX / window.innerWidth) * 2 - 1;
mousePosition.y = -(e.clientY / window.innerHeight) * 2 + 1;
//console.log("Click(rX,rY): ", mousePosition.x.toFixed(5), mousePosition.y.toFixed(5))
rayCaster.setFromCamera(mousePosition, camera);
const intersects = rayCaster.intersectObjects(scene.children /*, false*/ ); //Deep
intersects.every((e) => {
const name = e.object.name
if (name !== undefined) {
//console.log("Name: ", name)
if (name == 'Earth') {
var t2 = cartesian2Polar(e.point);
//console.log("HIT(x,y,z):", e.point.x.toFixed(3), e.point.y.toFixed(3), e.point.z.toFixed(3))
var wgs = cartesian2Polar(e.point);
guiTerminal("\u25cf Earth: Lat, Lng: " + wgs.lat.toFixed(2) + ", " + wgs.lng.toFixed(2)) // WGS84
groundObj.setRotationFromEuler(new THREE.Euler(-wgs.lat/180*Math.PI, wgs.lng/180*Math.PI, 0, 'YXZ'))
if(!gndlineadded){ // Click-Circle Fuchsia
scene.add(groundObj)
gndlineadded=true
}
groundObj.visible=true
groundObj.scale.x = 0.1;
groundObj.scale.y = 0.1;
lineMaterialRadial.opacity = 1
function fadeout(){
const h = lineMaterialRadial.opacity - 0.02;
if(h<=0) groundObj.visible=false
else {
lineMaterialRadial.opacity = h;
groundObj.scale.x = 1.1-h;
groundObj.scale.y = 1.1-h;
setTimeout(fadeout,10)
}
}
setTimeout(fadeout,500)
return false // Bye!
}
if (name.startsWith('s')) {
const idx = parseInt(name.substring(1))
const sat = TLE.SelSatList[idx]
guiTerminal("\u25cf Satellite '" + sat.name + "':");
if (sat.satPos == null) {
guiTerminal("- Error: 'satrec.error:" + sat.sr.error + "'")
} else {
guiTerminal("- Lat, Lng: " + satellite.degreesLong(sat.satPos.lat).toFixed(3) + ", " +
satellite.degreesLong(sat.satPos.lng).toFixed(3))
guiTerminal("- Altitude: " + sat.satPos.alt.toFixed(0) + " km");
if (sat.satPos.speed) // >0 (only if enabled)
guiTerminal("- Speed: " + sat.satPos.speed.toFixed(3) + "km/sec")
}
return false // Bye!
}
}
return true // Continue
})
});
}
function setFspeed() {
if (appopt.expfspeed == 0) appopt.fspeed = 0;
else if (appopt.expfspeed > 0) appopt.fspeed = Math.pow(10, appopt.expfspeed - 1);
else appopt.fspeed = -Math.pow(10, -appopt.expfspeed - 1);
}
// Get Obj with URL Parameters e.g. http://localhost/wrk/leoview/?a=b return {a:'b'}
function g_init() {
// Isolate URL Parameters
var qs = location.search.substring(1).split('&')
var urlpar = {}
for (var x = 0; x < qs.length; x++) {
var kv = qs[x].split('=')
if (kv[1] === undefined) kv[1] = ''
urlpar[kv[0]] = kv[1]
}
return urlpar
}
/*==================== MAIN ====================
-- URL Options: (only working if deployed on own server, not on github)
min - Minimize GUI
sm=text,text.. - Searchmask e.g. ?sm=atrocast,iridium
ec=0..3000 - Size of EarthCircle km
ps=0..86400 - Propagation seconds
sz=0.001 .. 0.1 - Sat.size
sp=-4..4 - Speed
nl - Do not display LINKs!
*/
try {
initJot3(false, false); // Init Jo 3D Framwwork orbitcontrol, camera, scene
// Analyse URL Parameters
let urlpar = g_init()
//urlpar.nl = 0; //noLinktoHome, noLink to Joembedded
//urlpar.min = 0; //StartMinimized
// console.log(urlpar)
if (urlpar.min !== undefined) { // OPTION min - Minimize GUI
gui.close(); // Open Closed
guiTerminalShow(false);
}
if (urlpar.sm !== undefined) { // OPTION sm - Searchmask e.g. ?sm=atrocast,iridium
appopt.searchmask = decodeURI(urlpar.sm)
}
if (urlpar.ec !== undefined) { // OPTION ec - Size of EarthCircle
const h = parseInt(urlpar.ec);
if (!isNaN(h) && h >= 0 && h <= 3000) appopt.earthcircle = h
}
if (urlpar.ps !== undefined) { // OPTION ps - Propagation seconds
const h = parseInt(urlpar.ps);
if (!isNaN(h) && h >= 0 && h <= 86400) appopt.propsec = h
}
if (urlpar.sz !== undefined) { // OPTION sz - Sat.size
const h = parseFloat(urlpar.sz);
if (!isNaN(h) && h >= 0.001 && h <= 0.1) appopt.puksize = h
}
if (urlpar.sp !== undefined) { // OPTION sp - Speed
const h = parseInt(urlpar.sp);
if (!isNaN(h) && h >= -4 && h <= 4) {
appopt.expfspeed = h
setFspeed()
}
}
const appoptions = gui.addFolder("App Options");
appoptions.open();
appdgsearch = appoptions.add(appopt, 'searchmask').name("Searchmask")
guiTerminal("\u2b50 LEO View - LEO Satellite Tracker \u2b50")
if (urlpar.nl === undefined) { // OPTION nl - Do not display LINKs!
document.getElementById('id_ainfo').innerHTML = '<a href="https://github.com/joembedded/LEO-Satellite-Viewer" target="_blank"> [ Home ] </a>'
guiTerminal("JoEmbedded.de / V0.5")
}
guiTerminal("")
// Background - 6 ident. Sides Box
const backgroundcube = new THREE.CubeTextureLoader().load(Array(6).fill(backgroundImage));
scene.background = (appopt.showbackimg) ? backgroundcube : undefined;
genEarth() // R=1
// Search action after load
appoptions.add(appopt, 'puksize', 0.001, 0.1).name("Sat.Size").onChange(
() => {
populateSatellites()
})
appoptions.add(appopt, 'earthcircle', 0, 3000).name("EarthCircle(km)").onChange(
() => {
populateSatellites()
})
appoptions.add(new function () {
this.cam0 = () => cameraHome()
}, 'cam0').name("<button style='background: #555; color: #DDD;'> Camera Home </button>");
appoptions.add(new function () {
this.now0 = () => {
cdate_ts = Date.now() // Current timestamp starts with NOW
last_ts = cdate_ts;
}
}, 'now0').name("<button style='background: #555; color: #DDD;'> Use current Time </button>");
appoptions.add(appopt, 'expfspeed', -4, 4, 1).name("Speed Factor").onChange(setFspeed)
appdgprop = appoptions.add(appopt, 'propsec', 0, 86400, 100).name("Prop.(sec)")
appoptions.add(appopt, 'showbackimg').name("Background Image").onChange(() => scene.background = (appopt.showbackimg) ? backgroundcube : undefined)
monitorView() // Check Coords
guiTerminal("Load LEO Satellite Data...")
tleSetup()
scene.add(groupSatellites)
scene.add(groupTrajectories)
initMouse()
// ---Animate all---
// Frame
var last_ts = cdate_ts
function animate() {
const new_ts = Date.now()
const tsdelta = (new_ts - last_ts) * appopt.fspeed
last_ts = new_ts
cdate_ts += tsdelta
TLE.calcPositions(new Date(cdate_ts));
TLE.SelSatList.forEach((e) => {
const nSat = e.sat3Obj
const hpos = e.satPos
if (hpos != null) {
//nSat.scale.z = 1 + (hpos.alt / EARTH_RADIUS_KM)
nSat.children[0].position.z = 1 + (hpos.alt / EARTH_RADIUS_KM) // Sprite
nSat.setRotationFromEuler(new THREE.Euler(-hpos.lat, hpos.lng, 0, 'YXZ'));
}
})
renderer.render(scene, camera);
}
renderer.setAnimationLoop(animate);
const idtime = document.getElementById('id_time')
setInterval(() => {
var tdisp = new Date(cdate_ts).toUTCString();
tdisp += ' (Speed: ' + appopt.fspeed + ')'
idtime.innerText = tdisp
if (needsprop == true) {
needsprop = false
populateTracks()
}
}, 1000)
} catch (err) {
alert("\u274C ERROR: - Reason: '" + err + "'")
}
/***/