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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>WebGL2 Lighting Playground</title>
<meta name="description" content="A browser-based 3D scene editor for experimenting with real-time lighting, shadows, and translucent color mixing - built with vanilla JavaScript and WebGL2.">
<meta name="keywords" content="Eetu Rantanen, XeduR, WebGL2, lighting, shadows, 3D, scene editor, JavaScript, real-time rendering, open source">
<meta name="author" content="Eetu Rantanen">
<link rel="apple-touch-icon" sizes="57x57" href="apple-icon-57x57.png">
<link rel="apple-touch-icon" sizes="60x60" href="apple-icon-60x60.png">
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<link rel="apple-touch-icon" sizes="76x76" href="apple-icon-76x76.png">
<link rel="apple-touch-icon" sizes="114x114" href="apple-icon-114x114.png">
<link rel="apple-touch-icon" sizes="120x120" href="apple-icon-120x120.png">
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<link rel="apple-touch-icon" sizes="180x180" href="apple-icon-180x180.png">
<link rel="icon" type="image/png" sizes="192x192" href="android-icon-192x192.png">
<link rel="icon" type="image/png" sizes="32x32" href="favicon-32x32.png">
<link rel="icon" type="image/png" sizes="96x96" href="favicon-96x96.png">
<link rel="icon" type="image/png" sizes="16x16" href="favicon-16x16.png">
<link rel="manifest" href="manifest.json">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-TileImage" content="ms-icon-144x144.png">
<meta name="theme-color" content="#ffffff">
<!-- Open Graph meta tags -->
<meta property="og:site_name" content="WebGL2 Lighting Playground">
<meta property="og:title" content="WebGL2 Lighting Playground">
<meta property="og:description" content="A browser-based 3D scene editor for experimenting with real-time lighting, shadows, and translucent color mixing - built with vanilla JavaScript and WebGL2.">
<meta property="og:image" content="https://xedur.github.io/webgl2-lighting-playground/webgl2-lighting-playground.png">
<meta property="og:image:alt" content="WebGL2 Lighting Playground - 3D scene with colored cubes casting tinted light and shadows">
<!-- Twitter/X card meta tags -->
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="WebGL2 Lighting Playground">
<meta name="twitter:description" content="A browser-based 3D scene editor for experimenting with real-time lighting, shadows, and translucent color mixing - built with vanilla JavaScript and WebGL2.">
<meta name="twitter:image" content="https://xedur.github.io/webgl2-lighting-playground/webgl2-lighting-playground.png">
<meta name="twitter:image:alt" content="WebGL2 Lighting Playground - 3D scene with colored cubes casting tinted light and shadows">
<link rel="stylesheet" href="css/style.css">
<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap" rel="stylesheet">
</head>
<body>
<div id="app">
<main id="viewport">
<canvas id="gl-canvas"></canvas>
</main>
<div id="panel-backdrop"></div>
<!-- Mobile viewport warning (hidden on desktop, dismissible) -->
<div id="small-viewport-banner" role="alert">
<span>This playground works best on a desktop.</span>
<button id="dismiss-viewport-banner" aria-label="Dismiss banner">×</button>
</div>
<!-- Top Bar -->
<header id="top-bar">
<div class="logo">
<h1 class="logo-text">WebGL2 Lighting Playground</h1>
</div>
<div class="top-controls">
<div class="quality-selector">
<label for="quality-preset">Quality:</label>
<select id="quality-preset">
<option value="low">Low</option>
<option value="medium">Medium</option>
<option value="high" selected>High</option>
<option value="ultra">Ultra</option>
</select>
</div>
<div class="shadow-toggle">
<label>
<input type="checkbox" id="soft-shadows" checked>
Soft Shadows
</label>
</div>
<button id="reset-scene" class="btn btn-secondary">Reset Scene</button>
</div>
<div class="stats">
<span id="fps-counter">60 FPS</span>
<span id="draw-calls">0 draws</span>
</div>
</header>
<!-- Panel toggle buttons (shared desktop and mobile) -->
<button id="btn-toggle-left" class="panel-toggle panel-toggle-left" title="Hide left panel" aria-label="Toggle left panel" data-icon="chevronLeft"></button>
<button id="btn-toggle-right" class="panel-toggle panel-toggle-right" title="Hide right panel" aria-label="Toggle right panel" data-icon="chevronRight"></button>
<!-- Left Panel: Scene Hierarchy -->
<aside id="left-panel" class="panel">
<div class="panel-header">
<h2>Scene</h2>
<div class="panel-actions">
<button id="add-object-btn" class="btn btn-add" title="Add Object">ADD +</button>
</div>
</div>
<div class="panel-content">
<div class="add-menu" id="add-menu">
<div class="add-menu-section">
<h3>Objects</h3>
<button data-type="cube" class="add-item">
<span class="icon" data-icon="cube"></span> Cube
</button>
<button data-type="sphere" class="add-item">
<span class="icon" data-icon="sphere"></span> Sphere
</button>
</div>
<div class="add-menu-section">
<h3>Lights</h3>
<button data-type="directional" class="add-item">
<span class="icon" data-icon="directional"></span> Directional
</button>
<button data-type="point" class="add-item">
<span class="icon" data-icon="point"></span> Point Light
</button>
<button data-type="spot" class="add-item">
<span class="icon" data-icon="spot"></span> Spotlight
</button>
</div>
</div>
<ul id="scene-list" class="scene-list" role="listbox" aria-label="Scene items"></ul>
</div>
</aside>
<!-- Right Panel: Properties -->
<aside id="right-panel" class="panel">
<div class="panel-header">
<h2>Properties</h2>
</div>
<div class="panel-content" id="properties-content">
<div class="no-selection">
<p>Select an object or light to edit its properties</p>
</div>
</div>
</aside>
<!-- Bottom Toolbar -->
<footer id="toolbar">
<div class="tool-group">
<span class="tool-group-tag">Object</span>
<button id="tool-select" class="tool-btn active" title="Select (Q)" aria-label="Select tool">
<span class="tool-icon" data-icon="select"></span>
</button>
<button id="tool-move" class="tool-btn" title="Move (W)" aria-label="Move tool">
<span class="tool-icon" data-icon="move"></span>
</button>
<button id="tool-rotate" class="tool-btn" title="Rotate (E)" aria-label="Rotate tool">
<span class="tool-icon" data-icon="rotate"></span>
</button>
<button id="tool-scale" class="tool-btn" title="Scale (R)" aria-label="Scale tool">
<span class="tool-icon" data-icon="scale"></span>
</button>
<span class="tool-group-divider"></span>
<button id="delete-btn" class="tool-btn" title="Delete (Del)" aria-label="Delete">
<span class="tool-icon" data-icon="delete"></span>
</button>
<button id="duplicate-btn" class="tool-btn" title="Duplicate (Ctrl+D)" aria-label="Duplicate">
<span class="tool-icon" data-icon="duplicate"></span>
</button>
</div>
<div class="tool-group">
<span class="tool-group-tag">History</span>
<button id="undo-btn" class="tool-btn" title="Undo (Ctrl+Z)" aria-label="Undo">
<span class="tool-icon" data-icon="undo"></span>
</button>
<button id="redo-btn" class="tool-btn" title="Redo (Ctrl+Y)" aria-label="Redo">
<span class="tool-icon" data-icon="redo"></span>
</button>
</div>
<div class="tool-group">
<span class="tool-group-tag">Camera</span>
<button id="reset-camera-btn" class="tool-btn" title="Reset Camera" aria-label="Reset camera">
<span class="tool-icon" data-icon="camera"></span>
</button>
</div>
<div class="camera-controls-hint" id="camera-controls-hint">
<span>Left drag: Orbit</span>
<span>Right drag: Pan</span>
<span>Scroll: Zoom</span>
</div>
<span class="footer-right">
<a href="https://www.erantanen.com" target="_blank" rel="noopener">© 2025-2026 Eetu Rantanen</a>
<a class="repo-link" href="https://github.com/XeduR/webgl2-lighting-playground" target="_blank" rel="noopener">Source available at: <img src="images/GitHub_Lockup_White.svg" alt="GitHub" height="16"></a>
</span>
</footer>
</div>
<script src="js/detectMobile.js"></script>
<script type="module" src="js/main.js"></script>
</body>
</html>