721 lines
21 KiB
HTML
721 lines
21 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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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>awesome johnruina site</title>
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<link rel="preconnect" href="https://fonts.googleapis.com">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link href="https://fonts.googleapis.com/css2?family=Inter:wght@600;800;900&display=swap" rel="stylesheet">
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<style>
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* { margin: 0; padding: 0; box-sizing: border-box; }
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body {
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min-height: 100vh;
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background: #0f0f0f;
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font-family: 'Inter', sans-serif;
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display: flex;
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align-items: center;
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justify-content: center;
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overflow: hidden;
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}
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.layout {
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display: flex;
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align-items: center;
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justify-content: center;
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height: 100vh;
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width: 100vw;
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gap: 1.5rem;
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padding: 1.5rem;
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}
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.canvas-wrap {
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display: flex;
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align-items: center;
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justify-content: center;
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flex: 1;
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min-width: 0;
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align-self: stretch;
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}
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.canvas-wrap canvas {
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max-width: 100%;
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max-height: 100%;
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aspect-ratio: 1;
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border-radius: 12px;
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box-shadow: 0 0 60px rgba(74,74,138,0.15);
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cursor: crosshair;
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}
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.top-bar {
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position: fixed;
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top: 0; left: 0; right: 0;
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display: flex;
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justify-content: space-between;
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align-items: center;
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padding: 1rem 1.5rem;
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z-index: 10;
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pointer-events: none;
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}
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.top-bar > * { pointer-events: auto; }
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.back-btn {
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text-decoration: none;
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color: #888;
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font-family: 'Inter', sans-serif;
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font-size: 0.75rem;
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font-weight: 700;
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letter-spacing: 0.5px;
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text-transform: uppercase;
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transition: color 0.2s;
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background: rgba(15,15,15,0.7);
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padding: 0.4rem 0.8rem;
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border-radius: 6px;
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border: 1px solid #333;
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}
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.back-btn:hover { color: #fff; border-color: #555; }
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.settings {
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width: 200px;
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display: flex;
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flex-direction: column;
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gap: 0.85rem;
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padding: 1.2rem;
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background: rgba(20,20,35,0.85);
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border: 1px solid #2a2a4a;
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border-radius: 12px;
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max-height: 90vh;
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overflow-y: auto;
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flex-shrink: 0;
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}
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.settings::-webkit-scrollbar { width: 4px; }
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.settings::-webkit-scrollbar-thumb { background: #333; border-radius: 2px; }
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.settings-title {
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color: #aaa;
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font-weight: 800;
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font-size: 0.65rem;
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letter-spacing: 1.5px;
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text-transform: uppercase;
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border-bottom: 1px solid #2a2a4a;
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padding-bottom: 0.6rem;
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}
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.s-group {
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display: flex;
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flex-direction: column;
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gap: 0.25rem;
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}
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.s-group label {
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display: flex;
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justify-content: space-between;
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color: #888;
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font-size: 0.6rem;
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font-weight: 600;
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letter-spacing: 0.5px;
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text-transform: uppercase;
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}
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.s-group label span { color: #bbb; font-weight: 800; }
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.s-group input[type="range"] {
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-webkit-appearance: none;
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appearance: none;
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width: 100%;
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height: 3px;
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background: #2a2a4a;
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border-radius: 2px;
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outline: none;
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cursor: pointer;
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}
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.s-group input[type="range"]::-webkit-slider-thumb {
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-webkit-appearance: none;
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appearance: none;
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width: 12px;
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height: 12px;
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background: #4a4a8a;
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border-radius: 50%;
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cursor: pointer;
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transition: background 0.2s;
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}
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.s-group input[type="range"]::-webkit-slider-thumb:hover { background: #6a6aaa; }
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.s-group input[type="range"]::-moz-range-thumb {
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width: 12px; height: 12px;
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background: #4a4a8a;
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border-radius: 50%;
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border: none;
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cursor: pointer;
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}
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.subtitle {
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color: #888;
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font-size: 0.6rem;
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font-weight: 600;
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letter-spacing: 0.5px;
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text-transform: uppercase;
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}
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.palette-row {
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display: flex;
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gap: 4px;
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flex-wrap: wrap;
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}
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.palette-swatch {
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width: 28px; height: 20px;
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border-radius: 4px;
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border: 2px solid transparent;
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cursor: pointer;
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transition: all 0.2s;
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}
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.palette-swatch:hover { border-color: #666; transform: scale(1.1); }
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.palette-swatch.active { border-color: #4a4a8a; box-shadow: 0 0 8px rgba(74,74,138,0.4); }
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.info-row {
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color: #555;
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font-size: 0.55rem;
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letter-spacing: 0.3px;
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line-height: 1.5;
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}
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.info-row strong { color: #777; }
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.s-btn {
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padding: 0.5rem 0;
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background: transparent;
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color: #666;
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border: 1px solid #333;
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border-radius: 6px;
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font-family: 'Inter', sans-serif;
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font-weight: 700;
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font-size: 0.6rem;
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cursor: pointer;
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transition: all 0.25s;
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text-transform: uppercase;
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letter-spacing: 0.5px;
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text-align: center;
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}
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.s-btn:hover { color: #ccc; border-color: #555; background: rgba(255,255,255,0.03); }
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.s-btn.active { color: #fff; border-color: #4a4a8a; background: #1a1a2e; }
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@media (max-width: 800px) {
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.layout { flex-direction: column; padding: 0.75rem; padding-top: 3rem; gap: 0.75rem; }
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.settings { width: 100%; max-height: 170px; flex-direction: row; flex-wrap: wrap; align-items: flex-start; gap: 0.4rem; padding: 0.6rem; }
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.settings .settings-title { width: 100%; font-size: 0.55rem; }
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.settings .s-group { flex: 1; min-width: 80px; }
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.settings .s-group label { font-size: 0.5rem; }
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.settings .palette-row { width: 100%; }
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.palette-swatch { width: 24px; height: 16px; }
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.subtitle { font-size: 0.5rem; }
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.s-btn { font-size: 0.5rem; padding: 0.35rem 0; }
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}
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@media (max-width: 480px) {
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.layout { padding: 0.5rem; padding-top: 2.6rem; gap: 0.5rem; }
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.settings { max-height: 130px; padding: 0.4rem; gap: 0.3rem; }
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.settings .s-group { min-width: 60px; }
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.canvas-wrap canvas { border-radius: 8px; }
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.s-group input[type="range"]::-webkit-slider-thumb { width: 16px; height: 16px; }
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.s-group input[type="range"]::-moz-range-thumb { width: 16px; height: 16px; }
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.info-row { font-size: 0.5rem; }
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}
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</style>
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</head>
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<body>
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<div class="top-bar">
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<a class="back-btn" href="index.html">← Back</a>
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</div>
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<div class="layout">
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<div class="canvas-wrap">
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<canvas id="aeroCanvas"></canvas>
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</div>
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<div class="settings">
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<div class="settings-title">Aerodynamics</div>
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<div class="s-group">
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<label>Viscosity <span id="viscVal">1.0e-6</span></label>
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<input type="range" id="viscSlider" min="0" max="10" step="0.1" value="1">
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</div>
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<div class="s-group">
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<label>Wind Speed <span id="windVal">3.0</span></label>
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<input type="range" id="windSlider" min="0.5" max="15" step="0.5" value="3">
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</div>
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<div class="s-group">
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<label>Particles <span id="partVal">600</span></label>
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<input type="range" id="partSlider" min="100" max="2000" step="50" value="600">
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</div>
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<div>
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<div class="subtitle">Display</div>
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<div style="display:flex;gap:4px;margin-top:4px">
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<button class="s-btn" style="flex:1" id="showSpeedBtn">Speed</button>
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<button class="s-btn" style="flex:1" id="showDyeBtn">Dye</button>
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</div>
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</div>
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<div>
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<div class="subtitle">Obstacle</div>
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<div style="display:flex;gap:4px;margin-top:4px">
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<button class="s-btn active" style="flex:1" id="obsOnBtn">On</button>
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<button class="s-btn" style="flex:1" id="obsOffBtn">Off</button>
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</div>
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</div>
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<div>
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<div class="subtitle">Palette</div>
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<div class="palette-row" id="paletteRow"></div>
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</div>
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<div class="info-row">
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Particles: <strong id="particleCount">0</strong>
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</div>
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<button class="s-btn" id="resetBtn">Reset</button>
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</div>
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</div>
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<script>
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// ─── palette ───
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const palettes = [
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{ name: 'neon', stops: [
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[0,0,0], [10,10,50], [20,40,120], [60,120,200],
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[100,200,220], [200,220,80], [240,140,40], [200,40,80], [100,10,60]
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]},
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{ name: 'fire', stops: [
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[0,0,0], [40,10,0], [100,20,0], [180,60,0],
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[240,140,20], [255,220,80], [255,255,200]
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]},
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{ name: 'ocean', stops: [
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[0,0,10], [5,20,60], [10,60,120], [40,120,180],
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[80,180,200], [160,220,220], [200,240,240]
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]},
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{ name: 'psych', stops: [
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[0,0,0], [80,0,80], [200,0,100], [255,100,0],
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[255,255,0], [0,200,100], [0,100,200], [80,0,120]
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]},
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];
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let currentPalette = 0;
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function buildPalette(name) {
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const p = palettes.find(x => x.name === name) || palettes[0];
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const arr = [];
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const segs = p.stops.length - 1;
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for (let i = 0; i < 256; i++) {
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const t = i / 255;
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const seg = Math.min(segs - 1, Math.floor(t * segs));
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const f = (t * segs) - seg;
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const a = p.stops[seg];
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const b = p.stops[seg + 1];
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arr.push([
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Math.round(a[0] + (b[0] - a[0]) * f),
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Math.round(a[1] + (b[1] - a[1]) * f),
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Math.round(a[2] + (b[2] - a[2]) * f),
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]);
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}
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return arr;
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}
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let palette = buildPalette('neon');
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function getPaletteColor(t) {
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const i = Math.max(0, Math.min(255, Math.floor(t * 255)));
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return palette[i];
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}
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function setPalette(name) {
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const idx = palettes.findIndex(x => x.name === name);
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if (idx >= 0) currentPalette = idx;
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palette = buildPalette(name);
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document.querySelectorAll('#paletteRow .palette-swatch').forEach(s => {
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s.classList.toggle('active', s.dataset.name === name);
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});
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}
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// ─── key state ───
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const keyState = {};
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document.addEventListener('keydown', (e) => { keyState[e.key.toLowerCase()] = true; });
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document.addEventListener('keyup', (e) => { keyState[e.key.toLowerCase()] = false; });
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// ─── aero sim ───
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const canvas = document.getElementById('aeroCanvas');
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const ctx = canvas.getContext('2d');
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const offscreen = document.createElement('canvas');
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const offCtx = offscreen.getContext('2d');
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const N = 160;
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const S = N + 2;
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const IX = (i, j) => i + j * S;
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let u = new Float32Array(S * S);
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let v = new Float32Array(S * S);
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let d = new Float32Array(S * S);
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let u0 = new Float32Array(S * S);
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let v0 = new Float32Array(S * S);
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let d0 = new Float32Array(S * S);
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let visc = 1e-6;
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let windSpeed = 3;
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let targetParticles = 600;
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let showSpeed = true;
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let showDye = false;
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let obstacleOn = true;
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const particles = [];
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let running = true;
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let animId = null;
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let startTime = 0;
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const dt = 0.12;
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// ─── slider refs ───
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const viscSlider = document.getElementById('viscSlider');
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const windSlider = document.getElementById('windSlider');
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const partSlider = document.getElementById('partSlider');
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const viscVal = document.getElementById('viscVal');
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const windVal = document.getElementById('windVal');
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const partVal = document.getElementById('partVal');
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const particleCount = document.getElementById('particleCount');
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function updateSliders() {
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visc = parseFloat(viscSlider.value) * 1e-6;
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windSpeed = parseFloat(windSlider.value);
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targetParticles = parseInt(partSlider.value);
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viscVal.textContent = visc.toExponential(1);
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windVal.textContent = windSpeed.toFixed(1);
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partVal.textContent = targetParticles;
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}
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viscSlider.addEventListener('input', updateSliders);
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windSlider.addEventListener('input', updateSliders);
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partSlider.addEventListener('input', updateSliders);
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// ─── palette swatches ───
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(function buildPaletteSwatches() {
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const row = document.getElementById('paletteRow');
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palettes.forEach((p) => {
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const swatch = document.createElement('div');
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swatch.className = 'palette-swatch' + (p.name === 'neon' ? ' active' : '');
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const col = buildPalette(p.name);
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const avg = col[Math.floor(col.length * 0.6)];
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swatch.style.background = `rgb(${avg[0]},${avg[1]},${avg[2]})`;
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swatch.title = p.name;
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swatch.dataset.name = p.name;
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swatch.addEventListener('click', () => setPalette(p.name));
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row.appendChild(swatch);
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});
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})();
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// ─── display mode ───
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document.getElementById('showSpeedBtn').addEventListener('click', () => {
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showSpeed = true; showDye = false;
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document.getElementById('showSpeedBtn').classList.add('active');
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document.getElementById('showDyeBtn').classList.remove('active');
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});
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document.getElementById('showDyeBtn').addEventListener('click', () => {
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showSpeed = false; showDye = true;
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document.getElementById('showDyeBtn').classList.add('active');
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document.getElementById('showSpeedBtn').classList.remove('active');
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});
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// ─── obstacle toggle ───
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document.getElementById('obsOnBtn').addEventListener('click', () => { obstacleOn = true;
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document.getElementById('obsOnBtn').classList.add('active');
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document.getElementById('obsOffBtn').classList.remove('active');
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});
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document.getElementById('obsOffBtn').addEventListener('click', () => { obstacleOn = false;
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document.getElementById('obsOffBtn').classList.add('active');
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document.getElementById('obsOnBtn').classList.remove('active');
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});
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// ─── fluid core ───
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function setBnd(b, x) {
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for (let i = 1; i <= N; i++) {
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x[IX(0, i)] = b === 1 ? -x[IX(1, i)] : x[IX(1, i)];
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x[IX(N+1, i)] = b === 1 ? -x[IX(N, i)] : x[IX(N, i)];
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x[IX(i, 0)] = b === 2 ? -x[IX(i, 1)] : x[IX(i, 1)];
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x[IX(i, N+1)] = b === 2 ? -x[IX(i, N)] : x[IX(i, N)];
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}
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x[IX(0, 0)] = 0.5 * (x[IX(1, 0)] + x[IX(0, 1)]);
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x[IX(0, N+1)] = 0.5 * (x[IX(1, N+1)] + x[IX(0, N)]);
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x[IX(N+1, 0)] = 0.5 * (x[IX(N, 0)] + x[IX(N+1, 1)]);
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x[IX(N+1, N+1)] = 0.5 * (x[IX(N, N+1)] + x[IX(N+1, N)]);
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}
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function linSolve(b, x, x0, a, c, iter) {
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const cRecip = 1 / c;
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for (let k = 0; k < iter; k++) {
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for (let j = 1; j <= N; j++) {
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for (let i = 1; i <= N; i++) {
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x[IX(i,j)] = (x0[IX(i,j)] + a * (
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x[IX(i-1,j)] + x[IX(i+1,j)] + x[IX(i,j-1)] + x[IX(i,j+1)]
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)) * cRecip;
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}
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}
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setBnd(b, x);
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}
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}
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function diffuse(b, x, x0, vsc) {
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const a = dt * vsc * N * N;
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linSolve(b, x, x0, a, 1 + 4 * a, 20);
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}
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function advect(b, d, d0, u, v) {
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const dt0 = dt * N;
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for (let j = 1; j <= N; j++) {
|
|
for (let i = 1; i <= N; i++) {
|
|
let x = i - dt0 * u[IX(i,j)];
|
|
let y = j - dt0 * v[IX(i,j)];
|
|
if (x < 0.5) x = 0.5; if (x > N + 0.5) x = N + 0.5;
|
|
if (y < 0.5) y = 0.5; if (y > N + 0.5) y = N + 0.5;
|
|
const i0 = Math.floor(x); const i1 = i0 + 1;
|
|
const j0 = Math.floor(y); const j1 = j0 + 1;
|
|
const s1 = x - i0; const s0 = 1 - s1;
|
|
const t1 = y - j0; const t0 = 1 - t1;
|
|
d[IX(i,j)] = s0 * (t0 * d0[IX(i0,j0)] + t1 * d0[IX(i0,j1)])
|
|
+ s1 * (t0 * d0[IX(i1,j0)] + t1 * d0[IX(i1,j1)]);
|
|
}
|
|
}
|
|
setBnd(b, d);
|
|
}
|
|
|
|
function project(u, v, p, div) {
|
|
for (let j = 1; j <= N; j++) {
|
|
for (let i = 1; i <= N; i++) {
|
|
div[IX(i,j)] = -0.5 * (
|
|
u[IX(i+1,j)] - u[IX(i-1,j)] + v[IX(i,j+1)] - v[IX(i,j-1)]
|
|
) / N;
|
|
p[IX(i,j)] = 0;
|
|
}
|
|
}
|
|
setBnd(0, div); setBnd(0, p);
|
|
linSolve(0, p, div, 1, 4, 20);
|
|
for (let j = 1; j <= N; j++) {
|
|
for (let i = 1; i <= N; i++) {
|
|
u[IX(i,j)] -= 0.5 * N * (p[IX(i+1,j)] - p[IX(i-1,j)]);
|
|
v[IX(i,j)] -= 0.5 * N * (p[IX(i,j+1)] - p[IX(i,j-1)]);
|
|
}
|
|
}
|
|
setBnd(1, u); setBnd(2, v);
|
|
}
|
|
|
|
function step() {
|
|
diffuse(1, u0, u, visc);
|
|
diffuse(2, v0, v, visc);
|
|
project(u0, v0, u, v);
|
|
advect(1, u, u0, u0, v0);
|
|
advect(2, v, v0, u0, v0);
|
|
project(u, v, u0, v0);
|
|
|
|
d0.set(d);
|
|
diffuse(0, d0, d, 1e-7);
|
|
const tmp = d; d = d0; d0 = tmp;
|
|
advect(0, d, d0, u, v);
|
|
|
|
for (let i = 0; i < S * S; i++) d[i] *= 0.995;
|
|
}
|
|
|
|
function applyInflow() {
|
|
for (let j = 1; j <= N; j++) {
|
|
u[IX(1, j)] = windSpeed;
|
|
d[IX(1, j)] = Math.max(d[IX(1, j)], 0.3 + Math.random() * 0.2);
|
|
}
|
|
}
|
|
|
|
function applyObstacle() {
|
|
if (!obstacleOn) return;
|
|
const cx = N / 2;
|
|
const cy = N / 2;
|
|
const r = N * 0.08;
|
|
for (let j = 1; j <= N; j++) {
|
|
for (let i = 1; i <= N; i++) {
|
|
const dist = Math.sqrt((i - cx) ** 2 + (j - cy) ** 2);
|
|
if (dist <= r) {
|
|
u[IX(i, j)] = 0;
|
|
v[IX(i, j)] = 0;
|
|
d[IX(i, j)] = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// ─── particles ───
|
|
function spawnParticle() {
|
|
return {
|
|
x: Math.random() * 0.1,
|
|
y: 0.1 + Math.random() * 0.8,
|
|
age: 0,
|
|
};
|
|
}
|
|
|
|
function updateParticles() {
|
|
while (particles.length < targetParticles) {
|
|
particles.push(spawnParticle());
|
|
}
|
|
while (particles.length > targetParticles) {
|
|
particles.pop();
|
|
}
|
|
|
|
for (let i = particles.length - 1; i >= 0; i--) {
|
|
const p = particles[i];
|
|
p.age++;
|
|
|
|
const gi = Math.floor(p.x * N) + 1;
|
|
const gj = Math.floor(p.y * N) + 1;
|
|
const ig = Math.min(N, Math.max(1, gi));
|
|
const jg = Math.min(N, Math.max(1, gj));
|
|
|
|
p.x += u[IX(ig, jg)] * dt / N;
|
|
p.y += v[IX(ig, jg)] * dt / N;
|
|
|
|
if (p.x > 1 || p.x < 0 || p.y > 1 || p.y < 0 || p.age > 500) {
|
|
particles.splice(i, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
// ─── render ───
|
|
function render() {
|
|
const w = canvas.width;
|
|
const h = canvas.height;
|
|
if (w === 0 || h === 0) return;
|
|
|
|
const paletteShift = (performance.now() - startTime) * 0.0001;
|
|
|
|
const imgData = offCtx.createImageData(N, N);
|
|
const data = imgData.data;
|
|
|
|
let maxVel = 0.001;
|
|
if (showSpeed) {
|
|
for (let j = 1; j <= N; j++) {
|
|
for (let i = 1; i <= N; i++) {
|
|
const vel = Math.sqrt(u[IX(i,j)] ** 2 + v[IX(i,j)] ** 2);
|
|
if (vel > maxVel) maxVel = vel;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (let j = 0; j < N; j++) {
|
|
for (let i = 0; i < N; i++) {
|
|
const idx = (j * N + i) * 4;
|
|
let val;
|
|
if (showSpeed) {
|
|
const vel = Math.sqrt(u[IX(i+1, j+1)] ** 2 + v[IX(i+1, j+1)] ** 2);
|
|
val = Math.min(vel / maxVel, 1);
|
|
} else {
|
|
val = Math.min(d[IX(i+1, j+1)] * 0.5, 0.95);
|
|
}
|
|
const t = (val + paletteShift) % 1.0;
|
|
const c = getPaletteColor(t);
|
|
data[idx] = c[0];
|
|
data[idx + 1] = c[1];
|
|
data[idx + 2] = c[2];
|
|
data[idx + 3] = 255;
|
|
}
|
|
}
|
|
|
|
if (obstacleOn) {
|
|
const cx = N / 2;
|
|
const cy = N / 2;
|
|
const r = N * 0.08;
|
|
for (let j = 0; j < N; j++) {
|
|
for (let i = 0; i < N; i++) {
|
|
const dist = Math.sqrt((i - cx) ** 2 + (j - cy) ** 2);
|
|
if (dist <= r + 0.5) {
|
|
const idx = (j * N + i) * 4;
|
|
data[idx] = 30; data[idx+1] = 30; data[idx+2] = 40;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
offCtx.putImageData(imgData, 0, 0);
|
|
|
|
ctx.clearRect(0, 0, w, h);
|
|
ctx.fillStyle = '#05050a';
|
|
ctx.fillRect(0, 0, w, h);
|
|
ctx.imageSmoothingEnabled = true;
|
|
ctx.drawImage(offscreen, 0, 0, w, h);
|
|
|
|
// draw particles
|
|
ctx.fillStyle = 'rgba(200,220,255,0.6)';
|
|
const sx = w / N;
|
|
const sy = h / N;
|
|
for (const p of particles) {
|
|
const px = p.x * N * sx;
|
|
const py = p.y * N * sy;
|
|
const alpha = Math.min(1, 1 - p.age / 500);
|
|
ctx.globalAlpha = alpha * 0.7;
|
|
ctx.beginPath();
|
|
ctx.arc(px, py, 1.5, 0, Math.PI * 2);
|
|
ctx.fill();
|
|
}
|
|
ctx.globalAlpha = 1;
|
|
|
|
particleCount.textContent = particles.length;
|
|
}
|
|
|
|
function resizeSim() {
|
|
const wrap = document.querySelector('.canvas-wrap');
|
|
const rect = wrap.getBoundingClientRect();
|
|
let size = Math.floor(Math.min(rect.width, rect.height, 800));
|
|
if (size < 50) size = 400;
|
|
canvas.width = size;
|
|
canvas.height = size;
|
|
offscreen.width = N;
|
|
offscreen.height = N;
|
|
}
|
|
|
|
function loop() {
|
|
if (!running) return;
|
|
applyInflow();
|
|
step();
|
|
applyObstacle();
|
|
updateParticles();
|
|
render();
|
|
animId = requestAnimationFrame(loop);
|
|
}
|
|
|
|
function reset() {
|
|
u.fill(0); v.fill(0); d.fill(0);
|
|
u0.fill(0); v0.fill(0); d0.fill(0);
|
|
particles.length = 0;
|
|
}
|
|
|
|
// ─── events ───
|
|
canvas.addEventListener('mousedown', (e) => {
|
|
const rect = canvas.getBoundingClientRect();
|
|
const mx = (e.clientX - rect.left) / rect.width;
|
|
const my = (e.clientY - rect.top) / rect.height;
|
|
const gi = Math.floor(mx * N) + 1;
|
|
const gj = Math.floor(my * N) + 1;
|
|
const ig = Math.min(N, Math.max(1, gi));
|
|
const jg = Math.min(N, Math.max(1, gj));
|
|
u[IX(ig, jg)] += 5;
|
|
v[IX(ig, jg)] += 5;
|
|
});
|
|
|
|
document.getElementById('resetBtn').addEventListener('click', reset);
|
|
document.addEventListener('keydown', (e) => {
|
|
if (e.key === 'Escape') window.location.href = 'index.html';
|
|
});
|
|
window.addEventListener('resize', resizeSim);
|
|
|
|
// ─── start ───
|
|
updateSliders();
|
|
resizeSim();
|
|
startTime = performance.now();
|
|
loop();
|
|
</script>
|
|
</body>
|
|
</html>
|