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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Senthara Orbit, Rotation & Day/Night Visualization</title>
<script src="https://cdn.jsdelivr.net/npm/phaser@3.60.0/dist/phaser.js"></script>
<style>
body { margin: 0; overflow: hidden; }
canvas { display: block; }
</style>
<meta charset="UTF-8">
<title>Senthara Orbit, Rotation & Day/Night Visualization</title>
<script src="https://cdn.jsdelivr.net/npm/phaser@3.60.0/dist/phaser.js"></script>
<style>
body { margin: 0; overflow: hidden; }
canvas { display: block; }
/* Style for the control panel */
#controlPanel {
position: absolute;
bottom: 10px;
right: 10px;
background-color: rgba(0, 0, 0, 0.7);
padding: 10px;
border-radius: 5px;
font-family: Arial, sans-serif;
color: white;
}
#controlPanel button, #controlPanel select {
margin: 5px;
padding: 8px;
border-radius: 4px;
border: 1px solid #ccc;
background-color: #eee;
color: black;
cursor: pointer;
}
#controlPanel button:hover {
background-color: #ddd;
}
#controlPanel select:hover {
background-color: #ddd;
}
</style>
</head>
<body>
<script>
// Function to calculate the current Senthara date from simulationTime (in days)
// We add an offset so that simulationTime = 0 corresponds to "Autumn 36"
// With a 396-day year divided evenly into 4 seasons, an offset of 134 ensures:
// floor(134) mod 99 = 35 so that dayOfSeason becomes 35+1 = 36 and seasonIndex = 1 (Autumn).
function getSentharaDate(simDays) {
const offset = 134;
const X = Math.floor(simDays + offset);
const year = Math.floor(X / 396) + 1;
const dayOfYear = (X % 396) + 1;
const seasonIndex = Math.floor((dayOfYear - 1) / 99);
const dayOfSeason = dayOfYear - seasonIndex * 99;
const seasons = ["Summer", "Autumn", "Winter", "Spring"];
return `Year ${year} - ${seasons[seasonIndex]} ${dayOfSeason}`;
}
<div id="controlPanel">
<button id="playPauseButton">Play</button>
<button id="rewindButton">Rewind</button>
<select id="speedSelect">
<option value="1">x1</option>
<option value="2">x2</option>
<option value="5" selected>x5</option>
<option value="10">x10</option>
<option value="100">x100</option>
<option value="1000">x1000</option>
<option value="10000">x10000</option>
<option value="100000">x100000</option>
<option value="1000000">x1000000</option>
</select>
</div>
// Phaser configuration (responsive)
const config = {
type: Phaser.AUTO,
width: window.innerWidth,
height: window.innerHeight,
backgroundColor: "#000000",
scene: {
preload: preload,
create: create,
update: update
},
scale: {
mode: Phaser.Scale.RESIZE
}
};
<script>
// Function to calculate the current Senthara date from simulationTime (in days)
function getSentharaDate(simDays) {
const offset = 134;
const X = Math.floor(simDays + offset);
const year = Math.floor(X / 396) + 1;
const dayOfYear = (X % 396) + 1;
const seasonIndex = Math.floor((dayOfYear - 1) / 99);
const dayOfSeason = dayOfYear - seasonIndex * 99;
const seasons = ["Summer", "Autumn", "Winter", "Spring"];
return `Year ${year} - ${seasons[seasonIndex]} ${dayOfSeason}`;
}
const game = new Phaser.Game(config);
// Phaser configuration (responsive)
const config = {
type: Phaser.AUTO,
width: window.innerWidth,
height: window.innerHeight,
backgroundColor: "#000000",
scene: {
preload: preload,
create: create,
update: update
},
scale: {
mode: Phaser.Scale.RESIZE
}
};
let globalGraphics;
let dateText;
let simulationTime = 0; // in days (simulation time)
const simulationSpeed = 5; // speed multiplier
const game = new Phaser.Game(config);
// Orbital periods (in days)
const planetPeriod = 396; // Senthara's orbital year
const planetRotationPeriod = 1; // Planet rotates fully in 1 day
const kerielPeriod = 27;
const arkaenPeriod = 82;
const minianPeriod = 98;
let globalGraphics;
let dateText;
let simulationTime = 0; // in days (simulation time)
let simulationSpeed = 5; // speed multiplier
let isPlaying = false; // Start paused
let isRewinding = false; // Control forward/backward
// Orbital radii (computed relative to window size)
let planetOrbitRadius, kerielOrbitRadius, arkaenOrbitRadius, minianOrbitRadius;
// Containers for the planet and the moons
let planetContainer;
let kerielContainer, arkaenContainer, minianContainer;
// Orbital periods (in days)
const planetPeriod = 396; // Senthara's orbital year
const planetRotationPeriod = 1; // Planet rotates fully in 1 day
const kerielPeriod = 27;
const arkaenPeriod = 82;
const minianPeriod = 98;
function preload() {
// No external assets are needed.
}
// Orbital radii (computed relative to window size)
let planetOrbitRadius, kerielOrbitRadius, arkaenOrbitRadius, minianOrbitRadius;
function create() {
globalGraphics = this.add.graphics();
// Containers for the planet and the moons
let planetContainer;
let kerielContainer, arkaenContainer, minianContainer;
dateText = this.add.text(10, game.scale.height - 30, "", {
font: "20px Arial",
fill: "#ffffff"
});
function preload() {
// No external assets are needed.
}
recalcOrbitRadii();
function create() {
globalGraphics = this.add.graphics();
// Create a container for Senthara (the planet)
planetContainer = this.add.container(0, 0);
dateText = this.add.text(10, game.scale.height - 30, "", {
font: "20px Arial",
fill: "#ffffff"
});
// Draw the planet body (green circle) with a marker for rotation.
let planetBody = this.add.graphics();
planetBody.fillStyle(0x00FF00, 1);
planetBody.fillCircle(0, 0, 12);
// Marker line (points to the right)
planetBody.lineStyle(2, 0x000000, 1);
planetBody.beginPath();
planetBody.moveTo(0, 0);
planetBody.lineTo(12, 0);
planetBody.strokePath();
planetContainer.add(planetBody);
recalcOrbitRadii();
// Create a night overlay (semi-transparent dark half-circle)
let nightOverlay = this.add.graphics();
nightOverlay.fillStyle(0x000000, 0.5);
// Draw a half-circle (180° arc) with radius 12
nightOverlay.slice(0, 0, 12, 0, Math.PI, false);
nightOverlay.fillPath();
// Save as a property for updating its rotation later.
planetContainer.nightOverlay = nightOverlay;
planetContainer.add(nightOverlay);
// Create a container for Senthara (the planet)
planetContainer = this.add.container(0, 0);
// Create containers for each moon.
kerielContainer = createMoonContainer(this, 6, 0xFF0000); // Keriel: red
arkaenContainer = createMoonContainer(this, 5, 0x0000FF); // Arkaen: blue
minianContainer = createMoonContainer(this, 5, 0xFFFFFF); // Minian: white
// Draw the planet body (green circle) with a marker for rotation.
let planetBody = this.add.graphics();
planetBody.fillStyle(0x00FF00, 1);
planetBody.fillCircle(0, 0, 12);
// Marker line (points to the right)
planetBody.lineStyle(2, 0x000000, 1);
planetBody.beginPath();
planetBody.moveTo(0, 0);
planetBody.lineTo(12, 0);
planetBody.strokePath();
planetContainer.add(planetBody);
// Listen for window resize events.
this.scale.on('resize', (gameSize) => {
recalcOrbitRadii();
dateText.setPosition(10, gameSize.height - 30);
});
}
// Create a night overlay (semi-transparent dark half-circle)
let nightOverlay = this.add.graphics();
nightOverlay.fillStyle(0x000000, 0.5);
// Draw a half-circle (180° arc) with radius 12
nightOverlay.slice(0, 0, 12, 0, Math.PI, false);
nightOverlay.fillPath();
// Save as a property for updating its rotation later.
planetContainer.nightOverlay = nightOverlay;
planetContainer.add(nightOverlay);
// Helper function to create a moon container with a circular body and a marker.
function createMoonContainer(scene, radius, color) {
let moonContainer = scene.add.container(0, 0);
let moonBody = scene.add.graphics();
moonBody.fillStyle(color, 1);
moonBody.fillCircle(0, 0, radius);
// Marker line indicating the "front" of the moon.
moonBody.lineStyle(2, 0x000000, 1);
moonBody.beginPath();
moonBody.moveTo(0, 0);
moonBody.lineTo(radius, 0);
moonBody.strokePath();
moonContainer.add(moonBody);
return moonContainer;
}
// Create containers for each moon.
kerielContainer = createMoonContainer(this, 6, 0xFF0000); // Keriel: red
arkaenContainer = createMoonContainer(this, 5, 0x0000FF); // Arkaen: blue
minianContainer = createMoonContainer(this, 5, 0xFFFFFF); // Minian: white
// Recalculate orbital radii based on the current window size.
function recalcOrbitRadii() {
const minDim = Math.min(window.innerWidth, window.innerHeight);
planetOrbitRadius = minDim * 0.3; // 30% of the smaller dimension
kerielOrbitRadius = planetOrbitRadius * 0.25;
arkaenOrbitRadius = planetOrbitRadius * 0.35;
minianOrbitRadius = planetOrbitRadius * 0.45;
}
// Listen for window resize events.
this.scale.on('resize', (gameSize) => {
recalcOrbitRadii();
dateText.setPosition(10, gameSize.height - 30);
});
function update(time, delta) {
// Advance simulation time.
simulationTime += (delta * simulationSpeed) / 1000;
// Get center of the screen (position of the star).
const centerX = game.scale.width / 2;
const centerY = game.scale.height / 2;
// --- UI Control Event Handlers ---
const playPauseButton = document.getElementById("playPauseButton");
const rewindButton = document.getElementById("rewindButton");
const speedSelect = document.getElementById("speedSelect");
// Clear global graphics.
globalGraphics.clear();
playPauseButton.addEventListener("click", () => {
isPlaying = !isPlaying;
playPauseButton.textContent = isPlaying ? "Pause" : "Play";
if (isPlaying) isRewinding = false; // Stop rewinding when playing
});
// Draw the central star.
globalGraphics.fillStyle(0xFFFF00, 1);
globalGraphics.fillCircle(centerX, centerY, 20);
// Draw Senthara's orbital path (around the star).
globalGraphics.lineStyle(1, 0x555555, 1);
globalGraphics.strokeCircle(centerX, centerY, planetOrbitRadius);
rewindButton.addEventListener("click", () => {
isRewinding = !isRewinding;
rewindButton.textContent = isRewinding ? "Forward" : "Rewind";
if(isRewinding) isPlaying = false; // Pause when rewinding
playPauseButton.textContent = "Play"; // Reset play/pause button
});
// Calculate Senthara's (the planet's) position along its orbit.
const planetOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % planetPeriod)) / planetPeriod - 90);
const planetX = centerX + planetOrbitRadius * Math.cos(planetOrbitAngle);
const planetY = centerY + planetOrbitRadius * Math.sin(planetOrbitAngle);
speedSelect.addEventListener("change", () => {
simulationSpeed = parseFloat(speedSelect.value);
});
}
// Update the planet container's position.
planetContainer.x = planetX;
planetContainer.y = planetY;
// Set the planet's self-rotation (day/night cycle) with a 1-day period.
const planetRotationAngle = Phaser.Math.DegToRad((360 * (simulationTime % planetRotationPeriod)) / planetRotationPeriod);
planetContainer.rotation = planetRotationAngle;
// Helper function to create a moon container with a circular body and a marker.
function createMoonContainer(scene, radius, color) {
let moonContainer = scene.add.container(0, 0);
let moonBody = scene.add.graphics();
moonBody.fillStyle(color, 1);
moonBody.fillCircle(0, 0, radius);
// Marker line indicating the "front" of the moon.
moonBody.lineStyle(2, 0x000000, 1);
moonBody.beginPath();
moonBody.moveTo(0, 0);
moonBody.lineTo(radius, 0);
moonBody.strokePath();
moonContainer.add(moonBody);
return moonContainer;
}
// Update the night overlay so that the dark half covers the side away from the star.
const subsolarAngle = Phaser.Math.Angle.Between(planetX, planetY, centerX, centerY);
// The night overlay's rotation is adjusted relative to the planet's rotation.
planetContainer.nightOverlay.rotation = subsolarAngle + Math.PI / 2 - planetContainer.rotation;
// Recalculate orbital radii based on the current window size.
function recalcOrbitRadii() {
const minDim = Math.min(window.innerWidth, window.innerHeight);
planetOrbitRadius = minDim * 0.3; // 30% of the smaller dimension
kerielOrbitRadius = planetOrbitRadius * 0.25;
arkaenOrbitRadius = planetOrbitRadius * 0.35;
minianOrbitRadius = planetOrbitRadius * 0.45;
}
// Calculate and update moon positions (relative to Senthara).
// Keriel:
const kerielOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % kerielPeriod)) / kerielPeriod - 90);
const kerielX = planetX + kerielOrbitRadius * Math.cos(kerielOrbitAngle);
const kerielY = planetY + kerielOrbitRadius * Math.sin(kerielOrbitAngle);
kerielContainer.x = kerielX;
kerielContainer.y = kerielY;
// Ensure tidal locking: set Keriel's rotation so its marker points toward Senthara.
kerielContainer.rotation = Phaser.Math.Angle.Between(kerielX, kerielY, planetX, planetY);
function update(time, delta) {
// Advance or rewind simulation time based on state.
if (isPlaying) {
simulationTime += (delta * simulationSpeed) / 1000;
} else if (isRewinding) {
simulationTime -= (delta * simulationSpeed) / 1000;
}
// Arkaen:
const arkaenOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % arkaenPeriod)) / arkaenPeriod - 90);
const arkaenX = planetX + arkaenOrbitRadius * Math.cos(arkaenOrbitAngle);
const arkaenY = planetY + arkaenOrbitRadius * Math.sin(arkaenOrbitAngle);
arkaenContainer.x = arkaenX;
arkaenContainer.y = arkaenY;
arkaenContainer.rotation = Phaser.Math.Angle.Between(arkaenX, arkaenY, planetX, planetY);
// Minian:
const minianOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % minianPeriod)) / minianPeriod - 90);
const minianX = planetX + minianOrbitRadius * Math.cos(minianOrbitAngle);
const minianY = planetY + minianOrbitRadius * Math.sin(minianOrbitAngle);
minianContainer.x = minianX;
minianContainer.y = minianY;
minianContainer.rotation = Phaser.Math.Angle.Between(minianX, minianY, planetX, planetY);
// Get center of the screen (position of the star).
const centerX = game.scale.width / 2;
const centerY = game.scale.height / 2;
// Optionally, redraw the moons' orbital paths (around Senthara).
globalGraphics.lineStyle(1, 0x888888, 1);
globalGraphics.strokeCircle(planetX, planetY, kerielOrbitRadius);
globalGraphics.strokeCircle(planetX, planetY, arkaenOrbitRadius);
globalGraphics.strokeCircle(planetX, planetY, minianOrbitRadius);
// Clear global graphics.
globalGraphics.clear();
// Update the Senthara calendar date text.
dateText.setText(getSentharaDate(simulationTime));
}
</script>
// Draw the central star.
globalGraphics.fillStyle(0xFFFF00, 1);
globalGraphics.fillCircle(centerX, centerY, 20);
// Draw Senthara's orbital path (around the star).
globalGraphics.lineStyle(1, 0x555555, 1);
globalGraphics.strokeCircle(centerX, centerY, planetOrbitRadius);
// Calculate Senthara's (the planet's) position along its orbit.
const planetOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % planetPeriod)) / planetPeriod - 90);
const planetX = centerX + planetOrbitRadius * Math.cos(planetOrbitAngle);
const planetY = centerY + planetOrbitRadius * Math.sin(planetOrbitAngle);
// Update the planet container's position.
planetContainer.x = planetX;
planetContainer.y = planetY;
// Set the planet's self-rotation (day/night cycle) with a 1-day period.
const planetRotationAngle = Phaser.Math.DegToRad((360 * (simulationTime % planetRotationPeriod)) / planetRotationPeriod);
planetContainer.rotation = planetRotationAngle;
// Update the night overlay so that the dark half covers the side away from the star.
const subsolarAngle = Phaser.Math.Angle.Between(planetX, planetY, centerX, centerY);
// The night overlay's rotation is adjusted relative to the planet's rotation.
planetContainer.nightOverlay.rotation = subsolarAngle + Math.PI / 2 - planetContainer.rotation;
// Calculate and update moon positions (relative to Senthara).
// Keriel:
const kerielOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % kerielPeriod)) / kerielPeriod - 90);
const kerielX = planetX + kerielOrbitRadius * Math.cos(kerielOrbitAngle);
const kerielY = planetY + kerielOrbitRadius * Math.sin(kerielOrbitAngle);
kerielContainer.x = kerielX;
kerielContainer.y = kerielY;
// Ensure tidal locking: set Keriel's rotation so its marker points toward Senthara.
kerielContainer.rotation = Phaser.Math.Angle.Between(kerielX, kerielY, planetX, planetY);
// Arkaen:
const arkaenOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % arkaenPeriod)) / arkaenPeriod - 90);
const arkaenX = planetX + arkaenOrbitRadius * Math.cos(arkaenOrbitAngle);
const arkaenY = planetY + arkaenOrbitRadius * Math.sin(arkaenOrbitAngle);
arkaenContainer.x = arkaenX;
arkaenContainer.y = arkaenY;
arkaenContainer.rotation = Phaser.Math.Angle.Between(arkaenX, arkaenY, planetX, planetY);
// Minian:
const minianOrbitAngle = Phaser.Math.DegToRad((360 * (simulationTime % minianPeriod)) / minianPeriod - 90);
const minianX = planetX + minianOrbitRadius * Math.cos(minianOrbitAngle);
const minianY = planetY + minianOrbitRadius * Math.sin(minianOrbitAngle);
minianContainer.x = minianX;
minianContainer.y = minianY;
minianContainer.rotation = Phaser.Math.Angle.Between(minianX, minianY, planetX, planetY);
// Optionally, redraw the moons' orbital paths (around Senthara).
globalGraphics.lineStyle(1, 0x888888, 1);
globalGraphics.strokeCircle(planetX, planetY, kerielOrbitRadius);
globalGraphics.strokeCircle(planetX, planetY, arkaenOrbitRadius);
globalGraphics.strokeCircle(planetX, planetY, minianOrbitRadius);
// Update the Senthara calendar date text.
dateText.setText(getSentharaDate(simulationTime));
}
</script>
</body>
</html>