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Update index.html
Browse files- index.html +370 -18
index.html
CHANGED
@@ -1,19 +1,371 @@
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<html>
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19 |
</html>
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<!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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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Why We See Only One Side of the Moon</title>
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+
<!-- Fonts for header and body -->
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<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;700&family=Space+Grotesk:wght@700&display=swap" rel="stylesheet">
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<script src="https://cdn.tailwindcss.com"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.9.0/p5.min.js"></script>
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<style>
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html, body, .font-sans {
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font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, "Noto Sans", sans-serif;
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}
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body {
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margin: 0;
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padding: 0;
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overflow: hidden;
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}
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#animation-container {
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position: relative;
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width: 100vw;
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height: 100vh;
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overflow: hidden;
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background-color: #000010;
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}
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#animation-canvas {
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display: block;
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position: absolute;
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top: 0;
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left: 0;
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z-index: 1;
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}
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.header-astro {
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font-family: 'Space Grotesk', 'Inter', Arial, sans-serif;
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font-weight: 700;
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letter-spacing: -0.01em;
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}
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.control-panel {
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position: absolute;
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bottom: 2rem;
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left: 2rem;
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z-index: 10;
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background: rgba(0, 0, 20, 0.7);
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backdrop-filter: blur(10px);
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border-radius: 1rem;
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padding: 1rem;
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box-shadow: 0 0 20px rgba(186, 215, 255, 0.2);
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display: flex;
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flex-direction: column;
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gap: 0.5rem;
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}
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.explanation-panel {
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position: absolute;
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top: 2rem;
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right: 2rem;
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z-index: 10;
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background: rgba(0, 0, 20, 0.7);
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backdrop-filter: blur(10px);
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border-radius: 1rem;
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padding: 1.5rem;
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box-shadow: 0 0 20px rgba(186, 215, 255, 0.2);
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color: white;
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width: 220px;
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font-size: 1rem;
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line-height: 1.6;
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transition: opacity 0.3s ease-in-out;
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opacity: 0;
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}
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.control-btn {
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padding: 0.5rem 1rem;
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font-size: 0.92rem;
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font-weight: 600;
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color: white;
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background-color: rgba(255, 255, 255, 0.1);
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border: 1px solid rgba(255, 255, 255, 0.2);
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border-radius: 0.5rem;
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cursor: pointer;
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transition: background-color 0.2s ease;
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text-align: center;
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font-family: 'Inter', system-ui, sans-serif;
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}
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.control-btn:hover {
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background-color: rgba(255, 255, 255, 0.2);
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}
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.control-btn.active {
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background-color: #4f46e5;
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border-color: #4f46e5;
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}
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/* Disclaimer at bottom, single line, smaller, no glow */
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.disclaimer-line {
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position: fixed;
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left: 50%;
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bottom: 1.1rem;
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transform: translateX(-50%);
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z-index: 40;
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font-size: 0.89rem;
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color: #b6bed7;
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font-family: 'Inter', system-ui, sans-serif;
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text-align: center;
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padding: 0 0.5rem;
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border-radius: 0.4rem;
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pointer-events: none;
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white-space: nowrap;
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background: transparent;
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opacity: 0.88;
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}
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</style>
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</head>
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<body class="bg-black text-white overflow-hidden font-sans">
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<div id="animation-container" class="relative">
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<h1 class="header-astro absolute text-center top-8 left-1/2 -translate-x-1/2 text-3xl md:text-4xl font-bold text-white z-20 w-11/12" style="text-shadow: 0 0 15px rgba(186, 215, 255, 0.7);">
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Why We See Only One Side of the Moon
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</h1>
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<!-- Canvas will be inserted here by p5.js -->
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</div>
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<div id="explanation-panel" class="explanation-panel"></div>
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<div class="control-panel">
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<button id="btn-no-rotation" class="control-btn">No Rotation</button>
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<button id="btn-fast-rotation" class="control-btn">Fast Rotation</button>
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+
<button id="btn-locked-rotation" class="control-btn active">Tidally Locked</button>
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</div>
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+
<div class="disclaimer-line">
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Disclaimer: Earth’s rotation is hidden to keep the focus on the Moon’s motion.
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</div>
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+
<script>
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+
document.addEventListener('DOMContentLoaded', () => {
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const sketch = (p) => {
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let earth;
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let moon;
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let stars = [];
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+
let rotationMode = 'locked';
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let starCount = 800;
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+
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const btnNoRotation = document.getElementById('btn-no-rotation');
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const btnFastRotation = document.getElementById('btn-fast-rotation');
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const btnLockedRotation = document.getElementById('btn-locked-rotation');
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const explanationPanel = document.getElementById('explanation-panel');
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+
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const explanations = {
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none: '<strong>No Rotation:</strong> The Moon does not spin on its own axis. The red line always points in the same direction, so we see all sides of the Moon as it orbits.',
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+
fast: '<strong>Fast Rotation:</strong> The Moon spins on its own axis very quickly, much faster than it orbits the Earth. We can easily see all of its sides.',
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+
locked: '<strong>Tidally Locked:</strong> The Moon rotates on its axis at the same speed it orbits the Earth. This is why the red line (and the same face) always points toward the Earth!'
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};
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+
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+
function updateActiveButton() {
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document.querySelectorAll('.control-btn').forEach(btn => btn.classList.remove('active'));
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148 |
+
explanationPanel.style.opacity = '1';
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149 |
+
if (rotationMode === 'none') {
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150 |
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btnNoRotation.classList.add('active');
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151 |
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explanationPanel.innerHTML = explanations.none;
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152 |
+
} else if (rotationMode === 'fast') {
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153 |
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btnFastRotation.classList.add('active');
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154 |
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explanationPanel.innerHTML = explanations.fast;
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155 |
+
} else if (rotationMode === 'locked') {
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156 |
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btnLockedRotation.classList.add('active');
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157 |
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explanationPanel.innerHTML = explanations.locked;
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158 |
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}
|
159 |
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}
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160 |
+
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161 |
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btnNoRotation.addEventListener('click', () => {
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162 |
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rotationMode = 'none';
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163 |
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updateActiveButton();
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164 |
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});
|
165 |
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btnFastRotation.addEventListener('click', () => {
|
166 |
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rotationMode = 'fast';
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167 |
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updateActiveButton();
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168 |
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});
|
169 |
+
btnLockedRotation.addEventListener('click', () => {
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170 |
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rotationMode = 'locked';
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171 |
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updateActiveButton();
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172 |
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});
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173 |
+
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174 |
+
function fillStars(n) {
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175 |
+
stars = [];
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176 |
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for (let i = 0; i < n; i++) {
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177 |
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stars.push(p.createVector(p.random(p.width), p.random(p.height)));
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178 |
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}
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179 |
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}
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180 |
+
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181 |
+
p.setup = () => {
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182 |
+
let canvas = p.createCanvas(p.windowWidth, p.windowHeight);
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183 |
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canvas.parent('animation-container');
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184 |
+
canvas.id('animation-canvas');
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185 |
+
p.colorMode(p.HSB, 360, 100, 100, 100);
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186 |
+
p.angleMode(p.DEGREES);
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187 |
+
earth = new Earth(p.width / 2, p.height / 2);
|
188 |
+
moon = new Moon(earth.pos.x, earth.pos.y, p.min(p.width, p.height) * 0.4);
|
189 |
+
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190 |
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starCount = Math.floor((p.width * p.height) / 1800);
|
191 |
+
fillStars(starCount);
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192 |
+
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193 |
+
updateActiveButton();
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194 |
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};
|
195 |
+
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p.draw = () => {
|
197 |
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p.background(245, 90, 10);
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198 |
+
drawStars();
|
199 |
+
moon.update();
|
200 |
+
earth.update();
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201 |
+
earth.display(moon.pos);
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202 |
+
moon.display();
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203 |
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};
|
204 |
+
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205 |
+
function drawStars() {
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206 |
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p.noStroke();
|
207 |
+
for (const star of stars) {
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208 |
+
star.x -= 0.02;
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209 |
+
if (star.x < 0) {
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210 |
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star.x = p.width;
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211 |
+
}
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212 |
+
let alpha = p.random(50, 100);
|
213 |
+
let size = p.random(1, 3);
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214 |
+
if (p.random() > 0.99) {
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215 |
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alpha = 100;
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216 |
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size = p.random(2.5, 4);
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217 |
+
}
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218 |
+
p.fill(0, 0, 100, alpha);
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219 |
+
p.ellipse(star.x, star.y, size, size);
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220 |
+
}
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221 |
+
}
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222 |
+
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223 |
+
p.windowResized = () => {
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224 |
+
p.resizeCanvas(p.windowWidth, p.windowHeight);
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225 |
+
if (earth) earth.pos.set(p.width / 2, p.height / 2);
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226 |
+
if (moon) {
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227 |
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moon.center.set(p.width / 2, p.height / 2);
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228 |
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moon.radius = p.min(p.width, p.height) * 0.35;
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229 |
+
}
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230 |
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starCount = Math.floor((p.width * p.height) / 1800);
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231 |
+
fillStars(starCount);
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232 |
+
};
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233 |
+
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234 |
+
class Earth {
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235 |
+
constructor(x, y) {
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236 |
+
this.pos = p.createVector(x, y);
|
237 |
+
this.bodySize = p.min(p.width, p.height) * 0.25;
|
238 |
+
this.eyes = [
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239 |
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{ offset: p.createVector(-this.bodySize * 0.27, -this.bodySize * 0.13), size: this.bodySize * 0.25 },
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{ offset: p.createVector(this.bodySize * 0.27, -this.bodySize * 0.13), size: this.bodySize * 0.25 }
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];
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242 |
+
}
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243 |
+
update() {
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244 |
+
this.bodySize = p.min(p.width, p.height) * 0.25;
|
245 |
+
this.eyes[0].offset.set(-this.bodySize * 0.27, -this.bodySize * 0.13);
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246 |
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this.eyes[1].offset.set(this.bodySize * 0.27, -this.bodySize * 0.13);
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247 |
+
this.eyes[0].size = this.bodySize * 0.25;
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248 |
+
this.eyes[1].size = this.bodySize * 0.25;
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249 |
+
}
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display(target) {
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251 |
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p.push();
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252 |
+
p.translate(this.pos.x, this.pos.y);
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253 |
+
p.drawingContext.shadowBlur = 60;
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254 |
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p.drawingContext.shadowColor = p.color(200, 80, 100, 50);
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255 |
+
p.fill(210, 80, 80);
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256 |
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p.noStroke();
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257 |
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p.ellipse(0, 0, this.bodySize, this.bodySize);
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258 |
+
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259 |
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p.fill(120, 60, 65);
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260 |
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p.noStroke();
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261 |
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p.beginShape();
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262 |
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p.curveVertex(this.bodySize * -0.15, this.bodySize * -0.4);
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263 |
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p.curveVertex(this.bodySize * -0.1, this.bodySize * -0.4);
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264 |
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p.curveVertex(this.bodySize * -0.2, this.bodySize * -0.2);
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265 |
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p.curveVertex(this.bodySize * -0.15, 0.05);
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266 |
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p.curveVertex(this.bodySize * -0.3, this.bodySize * 0.3);
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267 |
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p.curveVertex(this.bodySize * -0.2, this.bodySize * 0.45);
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268 |
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p.curveVertex(this.bodySize * 0.05, this.bodySize * 0.4);
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269 |
+
p.curveVertex(this.bodySize * 0.1, 0.1);
|
270 |
+
p.curveVertex(this.bodySize * -0.1, this.bodySize * -0.4);
|
271 |
+
p.curveVertex(this.bodySize * -0.1, this.bodySize * -0.4);
|
272 |
+
p.endShape(p.CLOSE);
|
273 |
+
|
274 |
+
p.beginShape();
|
275 |
+
p.curveVertex(this.bodySize * 0.4, this.bodySize * -0.3);
|
276 |
+
p.curveVertex(this.bodySize * 0.45, this.bodySize * -0.2);
|
277 |
+
p.curveVertex(this.bodySize * 0.35, 0);
|
278 |
+
p.curveVertex(this.bodySize * 0.4, this.bodySize * 0.25);
|
279 |
+
p.curveVertex(this.bodySize * 0.2, this.bodySize * 0.4);
|
280 |
+
p.curveVertex(this.bodySize * 0.15, this.bodySize * 0.2);
|
281 |
+
p.curveVertex(this.bodySize * 0.25, 0);
|
282 |
+
p.endShape(p.CLOSE);
|
283 |
+
|
284 |
+
p.fill(200, 5, 100, 90);
|
285 |
+
p.noStroke();
|
286 |
+
p.arc(0, 0, this.bodySize, this.bodySize, 250, 290, p.CHORD);
|
287 |
+
p.arc(0, 0, this.bodySize, this.bodySize, 70, 110, p.CHORD);
|
288 |
+
|
289 |
+
p.drawingContext.shadowBlur = 0;
|
290 |
+
|
291 |
+
this.eyes.forEach(eye => this.drawEye(eye.offset.x, eye.offset.y, eye.size, target));
|
292 |
+
|
293 |
+
p.noFill();
|
294 |
+
p.stroke(210, 20, 20, 80);
|
295 |
+
p.strokeWeight(4);
|
296 |
+
p.arc(0, this.bodySize * 0.15, this.bodySize * 0.4, this.bodySize * 0.27, 0, 180);
|
297 |
+
|
298 |
+
p.pop();
|
299 |
+
}
|
300 |
+
drawEye(x, y, size, target) {
|
301 |
+
let eyePos = p.createVector(this.pos.x + x, this.pos.y + y);
|
302 |
+
let angle = p.atan2(target.y - eyePos.y, target.x - eyePos.x);
|
303 |
+
let dist = p5.Vector.dist(target, eyePos);
|
304 |
+
let pupilOffset = p.min(dist, size / 2 - (size / 1.8 / 2));
|
305 |
+
p.push();
|
306 |
+
p.translate(x, y);
|
307 |
+
p.stroke(200, 10, 20, 80);
|
308 |
+
p.strokeWeight(2);
|
309 |
+
p.fill(200, 5, 100);
|
310 |
+
p.ellipse(0, 0, size, size);
|
311 |
+
p.rotate(angle);
|
312 |
+
p.noStroke();
|
313 |
+
p.fill(0);
|
314 |
+
p.ellipse(pupilOffset, 0, size / 1.8, size / 1.8);
|
315 |
+
p.pop();
|
316 |
+
}
|
317 |
+
}
|
318 |
+
class Moon {
|
319 |
+
constructor(centerX, centerY, radius) {
|
320 |
+
this.center = p.createVector(centerX, centerY);
|
321 |
+
this.radius = radius;
|
322 |
+
this.size = p.min(p.width, p.height) * 0.08;
|
323 |
+
this.orbitalAngle = 0;
|
324 |
+
this.selfRotationAngle = 0;
|
325 |
+
this.speed = 0.5;
|
326 |
+
this.pos = p.createVector();
|
327 |
+
}
|
328 |
+
update() {
|
329 |
+
this.size = p.min(p.width, p.height) * 0.08;
|
330 |
+
this.orbitalAngle += this.speed;
|
331 |
+
this.selfRotationAngle += 4;
|
332 |
+
this.pos.x = this.center.x + this.radius * p.cos(this.orbitalAngle);
|
333 |
+
this.pos.y = this.center.y + this.radius * p.sin(this.orbitalAngle);
|
334 |
+
}
|
335 |
+
display() {
|
336 |
+
p.noFill();
|
337 |
+
p.stroke(100, 0, 100, 10);
|
338 |
+
p.strokeWeight(1);
|
339 |
+
p.ellipse(this.center.x, this.center.y, this.radius * 2, this.radius * 2);
|
340 |
+
|
341 |
+
p.push();
|
342 |
+
p.translate(this.pos.x, this.pos.y);
|
343 |
+
|
344 |
+
if (rotationMode === 'locked') {
|
345 |
+
let angleToEarth = p.atan2(this.center.y - this.pos.y, this.center.x - this.pos.x);
|
346 |
+
p.rotate(angleToEarth);
|
347 |
+
} else if (rotationMode === 'fast') {
|
348 |
+
p.rotate(this.selfRotationAngle);
|
349 |
+
}
|
350 |
+
|
351 |
+
p.fill(0, 0, 50);
|
352 |
+
p.noStroke();
|
353 |
+
p.arc(0, 0, this.size, this.size, 90, 270);
|
354 |
+
|
355 |
+
p.fill(0, 0, 85);
|
356 |
+
p.arc(0, 0, this.size, this.size, -90, 90);
|
357 |
+
|
358 |
+
p.stroke(0, 100, 100);
|
359 |
+
p.strokeWeight(3);
|
360 |
+
p.line(0, -this.size * 0.5, 0, this.size * 0.5);
|
361 |
+
|
362 |
+
p.pop();
|
363 |
+
}
|
364 |
+
}
|
365 |
+
};
|
366 |
+
|
367 |
+
new p5(sketch);
|
368 |
+
});
|
369 |
+
</script>
|
370 |
+
</body>
|
371 |
</html>
|