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2.1 KiB
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34 lines
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2.1 KiB
HTML
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<title>Input.poll — Ludic</title>
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<meta name="description" content="Advance one frame of input; the single per-frame read behind actions and replay.">
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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-input.html">Input</a> <span>›</span> <span class="here">Input.poll</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">Input.poll</h1>
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</div>
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<code class="sig">Input.poll() -> int</code>
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<div class="desc"><p>Advances the input by one frame and returns the frame's key. Call it once at the top of a frame; the action reads (<a href="input-down.html"><code>Input.down</code></a>, <a href="input-pressed.html"><code>Input.pressed</code></a>) then report on the key it captured. It is the single place input crosses into the frame, which is what makes recording and replay possible: in record mode it saves the live key, and in replay mode it takes the next key from the tape instead of the device — so "read input" and "read a recorded snapshot" are the same call.</p></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Poll {
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entry {
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Input.bind("up", 'w')
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Input.poll()
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if Input.down("up") { print(1) }
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}
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}</pre></div>
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