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+<title>Light.gel — Ludic</title>
+<meta name="description" content="A colour cookie — later lights gel from their centre colour to this rim colour.">
+<link rel="stylesheet" href="base.css">
+<link rel="stylesheet" href="docs.css">
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+<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
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+  <div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-light.html">Light</a> <span>›</span> <span class="here">Light.gel</span></div>
+  <div class="item-head">
+    <span class="kind-badge kind-method">method</span>
+    <h1 id="top">Light.gel</h1>
+  </div>
+  <code class="sig">Light.gel(color)</code>
+  <div class="desc"><p>Sets a **gel** (a colour cookie) for lights emitted after it: the light blends from its own <code>color</code> at the centre to this <code>color</code> at the rim, so a single light can carry a two-tone tint — a warm core cooling to a blue edge, a fire that reddens outward. Clear it with <a href="light-clear_gel"><code>Light.clear_gel</code></a> to return to a flat single-colour light. The gel rides on both <a href="light-point"><code>Light.point</code></a> and <a href="light-spot"><code>Light.spot</code></a>, and persists until cleared. Per-channel Q16.16 interpolation — deterministic.</p></div>
+  <div class="params"><h2>Parameters</h2><div class="param" id="param-color"><code class="pname">color</code><span class="pdesc">the rim colour, <code>0x00RRGGBB</code></span></div></div>
+  <div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
+  property Torch { x: int = 0, y: int = 0 }
+  model Lamp { Torch }
+  handler Render phase Update {
+    Screen.clear(0)
+    Light.ambient(Color.rgb(24, 24, 32))
+    Light.gel(Color.rgb(40, 60, 160))                      # cool blue rim
+    Light.point(80, 60, 70, Color.rgb(255, 200, 120), 1.0)  # warm core
+    Light.clear_gel()
+    Screen.show()
+  }
+}</pre></div>
+  
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