b8d6ed9442
SONNENTERMINATUR: - Echtzeit Tag/Nacht-Grenze als orange Linie auf dem Globus - Nachtseite als halbtransparenter schwarzer Schatten - Basiert auf Sonnendeklination + UTC-Zeit - Aktualisiert jede Minute ZEITZONEN: - 24 vertikale Linien (alle 15 Grad Laengengrad) - Jede Zone zeigt aktuelle Uhrzeit (z.B. UTC+2 14:30) - Labels bei Zoom (<8000km) sichtbar - Aktualisiert jede Minute Alle Features der ersten Tabelle nun implementiert.
92 Zeilen
3.2 KiB
JavaScript
92 Zeilen
3.2 KiB
JavaScript
/**
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* Sonnenterminatur: Echtzeit Tag/Nacht-Grenze als Linie + Nachtflaeche.
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*/
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const TerminatorLayer = {
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_viewer: null,
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_entity: null,
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_line: null,
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_interval: null,
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_count: 0,
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start(viewer) {
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if (this._entity) return;
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this._viewer = viewer;
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this._render();
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this._count = 1;
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var self = this;
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this._interval = setInterval(function() { self._render(); }, 60000);
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},
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stop() {
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if (this._interval) { clearInterval(this._interval); this._interval = null; }
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if (this._entity && this._viewer) { this._viewer.entities.remove(this._entity); this._entity = null; }
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if (this._line && this._viewer) { this._viewer.entities.remove(this._line); this._line = null; }
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this._count = 0;
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},
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_calcTerminator() {
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// Sonnenposition berechnen
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var now = new Date();
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var dayOfYear = Math.floor((now - new Date(now.getFullYear(), 0, 0)) / 86400000);
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var declination = -23.45 * Math.cos((360 / 365) * (dayOfYear + 10) * Math.PI / 180);
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var decRad = declination * Math.PI / 180;
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// Stunden seit Mitternacht UTC
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var utcHours = now.getUTCHours() + now.getUTCMinutes() / 60 + now.getUTCSeconds() / 3600;
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var sunLon = -(utcHours - 12) * 15; // Sonnen-Laengengrad
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// Terminatur-Punkte berechnen (Polygon um die Nachtseite)
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var points = [];
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var linePoints = [];
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for (var i = 0; i <= 360; i += 2) {
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var lon = i - 180;
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var lonRad = (lon - sunLon) * Math.PI / 180;
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var lat = Math.atan(-Math.cos(lonRad) / Math.tan(decRad)) * 180 / Math.PI;
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linePoints.push(lon, lat);
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}
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// Nacht-Polygon: Terminatur-Linie + Pole
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var nightPolygon = [];
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// Oberer Rand (Nordpol oder Suedpol je nach Jahreszeit)
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var topLat = declination > 0 ? -90 : 90;
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nightPolygon.push(-180, topLat);
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for (var j = 0; j < linePoints.length; j += 2) {
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nightPolygon.push(linePoints[j], linePoints[j + 1]);
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}
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nightPolygon.push(180, topLat);
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return { line: linePoints, night: nightPolygon };
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},
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_render() {
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if (!this._viewer) return;
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var data = this._calcTerminator();
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// Alte Entities entfernen
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if (this._entity) this._viewer.entities.remove(this._entity);
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if (this._line) this._viewer.entities.remove(this._line);
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// Nachtflaeche (dunkel, halbtransparent)
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var nightPositions = Cesium.Cartesian3.fromDegreesArray(data.night);
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this._entity = this._viewer.entities.add({
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polygon: {
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hierarchy: new Cesium.PolygonHierarchy(nightPositions),
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material: Cesium.Color.BLACK.withAlpha(0.35),
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height: 0,
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outline: false,
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},
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});
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// Terminatur-Linie (leuchtend)
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var linePositions = Cesium.Cartesian3.fromDegreesArray(data.line);
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this._line = this._viewer.entities.add({
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polyline: {
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positions: linePositions,
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width: 2,
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material: Cesium.Color.fromCssColorString('#ff8800').withAlpha(0.6),
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clampToGround: true,
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},
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});
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},
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};
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