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36 lines
No EOL
2.2 KiB
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<title>Tween.loop — Ludic</title>
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<meta name="description" content="A repeating 0..1 sawtooth amount over duration.">
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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-tween.html">Tween</a> <span>›</span> <span class="here">Tween.loop</span></div>
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<div class="item-head">
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<span class="kind-badge kind-method">method</span>
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<h1 id="top">Tween.loop</h1>
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</div>
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<code class="sig">Tween.loop(timer, duration) -> fixed</code>
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<div class="desc"><p>Returns the fractional part of <code>timer / duration</code> — a sawtooth that ramps <code>0.0</code>→<code>1.0</code> then jumps back to <code>0.0</code> and repeats. Use it for a continuously cycling value: a scrolling offset, a rotating hue, a repeating pulse.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-timer"><code class="pname">timer</code><span class="pdesc">elapsed seconds (a <code>fixed</code>)</span></div><div class="param" id="param-duration"><code class="pname">duration</code><span class="pdesc">seconds per cycle (a <code>fixed</code>)</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
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property Spin { timer: fixed = 0.0 }
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model Coin { Spin }
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handler Run phase Update {
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Spin.timer = Spin.timer + Time.delta()
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let t = Tween.loop(Spin.timer, fixed(2)) # a 2-second cycle
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print(t)
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}
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}</pre></div>
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