290 lines
11 KiB
HTML
290 lines
11 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Senthara Orbit, Rotation, Day/Night & Elliptical Orbits</title>
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<script src="https://cdn.jsdelivr.net/npm/phaser@3.60.0/dist/phaser.js"></script>
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<style>
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body { margin: 0; overflow: hidden; }
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canvas { display: block; }
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/* Style for the control panel */
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#controlPanel {
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position: absolute;
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bottom: 10px;
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right: 10px;
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background-color: rgba(0, 0, 0, 0.7);
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padding: 10px;
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border-radius: 5px;
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font-family: Arial, sans-serif;
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color: white;
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}
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#controlPanel button, #controlPanel select {
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margin: 5px;
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padding: 8px;
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border-radius: 4px;
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border: 1px solid #ccc;
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background-color: #eee;
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color: black;
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cursor: pointer;
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}
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#controlPanel button:hover, #controlPanel select:hover {
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background-color: #ddd;
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}
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</style>
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</head>
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<body>
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<div id="controlPanel">
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<button id="playPauseButton">Play</button>
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<button id="rewindButton">Rewind</button>
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<select id="speedSelect">
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<option value="1">x1</option>
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<option value="2">x2</option>
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<option value="5" selected>x5</option>
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<option value="10">x10</option>
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<option value="100">x100</option>
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<option value="1000">x1000</option>
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<option value="10000">x10000</option>
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<option value="100000">x100000</option>
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<option value="1000000">x1000000</option>
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</select>
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</div>
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<script>
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// Helper: returns {x, y} for an elliptical orbit.
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// a = semi-major axis, ecc = eccentricity, so semi-minor axis b = a*sqrt(1 - ecc^2).
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// theta is a linear parameter based on simulation time (not the true anomaly, but sufficient for visualization).
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function getEllipticalPosition(simTime, period, a, ecc) {
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const theta = Phaser.Math.DegToRad((360 * (simTime % period)) / period - 90);
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const b = a * Math.sqrt(1 - ecc * ecc);
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return { x: a * Math.cos(theta), y: b * Math.sin(theta) };
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}
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// Function to calculate the current Senthara date from simulationTime (in days),
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// with an offset so that simulationTime=0 corresponds to "Autumn 36".
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function getSentharaDate(simDays) {
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const offset = 134;
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const X = Math.floor(simDays + offset);
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const year = Math.floor(X / 396) + 1;
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const dayOfYear = (X % 396) + 1;
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const seasonIndex = Math.floor((dayOfYear - 1) / 99);
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const dayOfSeason = dayOfYear - seasonIndex * 99;
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const seasons = ["Summer", "Autumn", "Winter", "Spring"];
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return `Year ${year} - ${seasons[seasonIndex]} ${dayOfSeason}`;
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}
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// Phaser configuration (responsive)
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const config = {
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type: Phaser.AUTO,
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width: window.innerWidth,
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height: window.innerHeight,
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backgroundColor: "#000000",
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scene: {
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preload: preload,
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create: create,
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update: update
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},
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scale: {
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mode: Phaser.Scale.RESIZE
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}
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};
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const game = new Phaser.Game(config);
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let globalGraphics;
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let dateText;
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let simulationTime = 0; // in days (simulation time)
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let simulationSpeed = 5; // speed multiplier
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let isPlaying = false; // Start paused
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let isRewinding = false; // Control forward/backward
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// Orbital periods (in days)
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const planetPeriod = 396; // Senthara's orbital year around its star
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const planetRotationPeriod = 1; // Planet rotates fully in 1 day
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const kerielPeriod = 27;
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const arkaenPeriod = 82;
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const minianPeriod = 98;
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// Eccentricity parameters (0 = circle; higher values = more elliptical)
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const planetEcc = 0.2; // Planet's orbit eccentricity
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const kerielEcc = 0.05; // Moons tend to have near-circular orbits due to tidal locking
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const arkaenEcc = 0.05;
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const minianEcc = 0.05;
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// Orbital radii (semi-major axes) (computed relative to window size)
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let planetOrbitRadius, kerielOrbitRadius, arkaenOrbitRadius, minianOrbitRadius;
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// Containers for the planet and the moons.
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let planetContainer;
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let kerielContainer, arkaenContainer, minianContainer;
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function preload() {
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// No external assets are needed.
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}
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function create() {
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globalGraphics = this.add.graphics();
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dateText = this.add.text(10, game.scale.height - 30, "", {
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font: "20px Arial",
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fill: "#ffffff"
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});
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recalcOrbitRadii();
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// Create container for Senthara (the planet)
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planetContainer = this.add.container(0, 0);
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// Planet body (green circle) with a marker line.
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let planetBody = this.add.graphics();
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planetBody.fillStyle(0x00FF00, 1);
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planetBody.fillCircle(0, 0, 12);
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planetBody.lineStyle(2, 0x000000, 1);
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planetBody.beginPath();
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planetBody.moveTo(0, 0);
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planetBody.lineTo(12, 0);
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planetBody.strokePath();
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planetContainer.add(planetBody);
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// Night overlay for day/night cycle (semi-transparent half-circle)
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let nightOverlay = this.add.graphics();
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nightOverlay.fillStyle(0x000000, 0.5);
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nightOverlay.slice(0, 0, 12, 0, Math.PI, false);
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nightOverlay.fillPath();
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planetContainer.nightOverlay = nightOverlay;
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planetContainer.add(nightOverlay);
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// Create containers for each moon.
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kerielContainer = createMoonContainer(this, 6, 0xFF0000); // Keriel: red
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arkaenContainer = createMoonContainer(this, 5, 0x0000FF); // Arkaen: blue
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minianContainer = createMoonContainer(this, 5, 0xFFFFFF); // Minian: white
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// UI Control Handlers
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const playPauseButton = document.getElementById("playPauseButton");
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const rewindButton = document.getElementById("rewindButton");
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const speedSelect = document.getElementById("speedSelect");
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playPauseButton.addEventListener("click", () => {
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isPlaying = !isPlaying;
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playPauseButton.textContent = isPlaying ? "Pause" : "Play";
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if (isPlaying) isRewinding = false;
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});
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rewindButton.addEventListener("click", () => {
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isRewinding = !isRewinding;
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rewindButton.textContent = isRewinding ? "Forward" : "Rewind";
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if(isRewinding) isPlaying = false;
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playPauseButton.textContent = "Play";
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});
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speedSelect.addEventListener("change", () => {
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simulationSpeed = parseFloat(speedSelect.value);
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});
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this.scale.on('resize', (gameSize) => {
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recalcOrbitRadii();
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dateText.setPosition(10, gameSize.height - 30);
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});
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}
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// Helper function to create a moon container with a circular body and a marker.
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function createMoonContainer(scene, radius, color) {
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let moonContainer = scene.add.container(0, 0);
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let moonBody = scene.add.graphics();
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moonBody.fillStyle(color, 1);
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moonBody.fillCircle(0, 0, radius);
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moonBody.lineStyle(2, 0x000000, 1);
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moonBody.beginPath();
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moonBody.moveTo(0, 0);
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moonBody.lineTo(radius, 0);
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moonBody.strokePath();
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moonContainer.add(moonBody);
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return moonContainer;
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}
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// Recalculate orbital radii based on window size.
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function recalcOrbitRadii() {
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const minDim = Math.min(window.innerWidth, window.innerHeight);
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planetOrbitRadius = minDim * 0.3; // semi-major axis for planet orbit
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kerielOrbitRadius = planetOrbitRadius * 0.25;
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arkaenOrbitRadius = planetOrbitRadius * 0.35;
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minianOrbitRadius = planetOrbitRadius * 0.45;
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}
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function update(time, delta) {
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// Advance or rewind simulation time.
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if (isPlaying) {
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simulationTime += (delta * simulationSpeed) / 1000;
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} else if (isRewinding) {
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simulationTime -= (delta * simulationSpeed) / 1000;
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}
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const centerX = game.scale.width / 2;
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const centerY = game.scale.height / 2;
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globalGraphics.clear();
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// Draw the central star.
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globalGraphics.fillStyle(0xFFFF00, 1);
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globalGraphics.fillCircle(centerX, centerY, 20);
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// Draw the planet's elliptical orbital path around the star.
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const bPlanet = planetOrbitRadius * Math.sqrt(1 - planetEcc * planetEcc);
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globalGraphics.lineStyle(1, 0x555555, 1);
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globalGraphics.strokeEllipse(centerX, centerY, 2 * planetOrbitRadius, 2 * bPlanet);
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// Get planet's position on its elliptical orbit.
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const planetPos = getEllipticalPosition(simulationTime, planetPeriod, planetOrbitRadius, planetEcc);
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const planetX = centerX + planetPos.x;
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const planetY = centerY + planetPos.y;
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// Update planet container position.
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planetContainer.x = planetX;
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planetContainer.y = planetY;
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// Planet rotates about its own axis with a 1-day period.
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const planetRotationAngle = Phaser.Math.DegToRad((360 * (simulationTime % planetRotationPeriod)) / planetRotationPeriod);
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planetContainer.rotation = planetRotationAngle;
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// Update night overlay so that the dark half covers the hemisphere away from the star.
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const subsolarAngle = Phaser.Math.Angle.Between(planetX, planetY, centerX, centerY);
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planetContainer.nightOverlay.rotation = subsolarAngle + Math.PI / 2 - planetContainer.rotation;
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// Draw moon orbital paths (elliptical) around Senthara.
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// For each moon, compute semi-minor axis: b = a * sqrt(1 - ecc^2).
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const bKeriel = kerielOrbitRadius * Math.sqrt(1 - kerielEcc * kerielEcc);
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const bArkaen = arkaenOrbitRadius * Math.sqrt(1 - arkaenEcc * arkaenEcc);
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const bMinian = minianOrbitRadius * Math.sqrt(1 - minianEcc * minianEcc);
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globalGraphics.lineStyle(1, 0x888888, 1);
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globalGraphics.strokeEllipse(planetX, planetY, 2 * kerielOrbitRadius, 2 * bKeriel);
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globalGraphics.strokeEllipse(planetX, planetY, 2 * arkaenOrbitRadius, 2 * bArkaen);
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globalGraphics.strokeEllipse(planetX, planetY, 2 * minianOrbitRadius, 2 * bMinian);
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// Calculate and update moon positions relative to Senthara.
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// Keriel:
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const kerielPos = getEllipticalPosition(simulationTime, kerielPeriod, kerielOrbitRadius, kerielEcc);
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const kerielX = planetX + kerielPos.x;
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const kerielY = planetY + kerielPos.y;
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kerielContainer.x = kerielX;
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kerielContainer.y = kerielY;
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kerielContainer.rotation = Phaser.Math.Angle.Between(kerielX, kerielY, planetX, planetY);
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// Arkaen:
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const arkaenPos = getEllipticalPosition(simulationTime, arkaenPeriod, arkaenOrbitRadius, arkaenEcc);
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const arkaenX = planetX + arkaenPos.x;
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const arkaenY = planetY + arkaenPos.y;
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arkaenContainer.x = arkaenX;
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arkaenContainer.y = arkaenY;
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arkaenContainer.rotation = Phaser.Math.Angle.Between(arkaenX, arkaenY, planetX, planetY);
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// Minian:
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const minianPos = getEllipticalPosition(simulationTime, minianPeriod, minianOrbitRadius, minianEcc);
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const minianX = planetX + minianPos.x;
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const minianY = planetY + minianPos.y;
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minianContainer.x = minianX;
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minianContainer.y = minianY;
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minianContainer.rotation = Phaser.Math.Angle.Between(minianX, minianY, planetX, planetY);
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// Update the Senthara calendar date text.
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dateText.setText(getSentharaDate(simulationTime));
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}
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</script>
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</body>
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</html>
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