2<html lang="en">
3 <head>
4 <meta charset="utf-8" />
5 <meta name="viewport" content="width=device-width, initial-scale=1" />
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7 <title>turing-sphere — reaction-diffusion on the sphere, live in the browser</title>
8 <style>
9 :root {
10 --bg: #ffffff;
11 --ink: #1f2328;
12 --ink-2: #57606a;
13 --line: #d0d7de;
14 --accent: #0969da;
15 --sphere-bg: #f4f6f8;
16 color-scheme: light dark;
17 }
18 @media (prefers-color-scheme: dark) {
19 :root {
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22 --ink-2: #9aa4af;
23 --line: #333b44;
24 --accent: #58a6ff;
25 --sphere-bg: #14161c;
26 }
27 }
28 body {
29 margin: 0;
30 background: var(--bg);
31 color: var(--ink);
32 font: 15px/1.5 system-ui, -apple-system, sans-serif;
33 }
34 main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 48px; }
35 h1 { font-size: 20px; margin: 0 0 2px; }
36 .sub { color: var(--ink-2); margin: 0 0 12px; font-size: 13px; }
37 .sub a { color: var(--accent); }
38 .controls {
39 display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center;
40 padding: 6px 0;
41 }
42 .controls label { color: var(--ink-2); font-size: 13px; white-space: nowrap; }
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52 button.primary { border-color: var(--accent); color: var(--accent); font-weight: 600; min-width: 5.5em; }
53 #panels {
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55 }
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58 border: 1px solid var(--line); border-radius: 8px; overflow: hidden;
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60 }
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68 }
69 .colorbar {
70 display: flex; flex-direction: column; align-items: center; justify-content: center;
71 gap: 4px; padding: 8px 4px; background: var(--sphere-bg);
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79 #err { color: #b35900; white-space: pre-wrap; font-size: 13px; }
80 </style>
81 </head>
82 <body>
83 <main>
84 <h1>turing-sphere</h1>
85 <p class="sub">
86 Reaction-diffusion on the sphere, solved live with spherical harmonics:
87 implicit spectral diffusion + explicit reaction (IMEX Euler), transforms on WebGPU via
88 <a href="https://github.com/concept-collection/shtns-webgpu">shtns-webgpu</a>.
89 Drag to rotate.
90 </p>
91 <div class="controls">
92 <label>preset
93 <select id="model"></select>
94 </label>
95 <label>lmax
96 <select id="lmax">
97 <option value="31">31</option>
98 <option value="63" selected>63</option>
99 <option value="127">127</option>
100 <option value="255">255</option>
101 </select>
102 </label>
103 <label>colormap
104 <select id="colormap"></select>
105 </label>
106 <label>backend
107 <select id="backend">
108 <option value="webgpu" selected>WebGPU (fp32)</option>
109 <option value="cpu">CPU (f64)</option>
110 </select>
111 </label>
112 <button id="runpause" class="primary">Run</button>
113 <button id="reseed">Re-seed</button>
114 <button id="resetview">Reset view</button>
115 </div>
116 <div class="controls" id="params"></div>
117 <div id="panels"></div>
118 <p class="stats" id="stats"></p>
119 <p id="blurb"></p>
120 <p id="err"></p>
121 </main>
122 <script type="module" src="/src/main.ts"></script>
123 </body>
124</html>