35 lines
No EOL
2.4 KiB
HTML
35 lines
No EOL
2.4 KiB
HTML
<!doctype html>
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<title>fixed — Ludic</title>
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<meta name="description" content="Convert an int (or a float) into a Q16.16 fixed-point value.">
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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="api.html#builtins">Builtin functions</a> <span>›</span> <span class="here">fixed</span></div>
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<div class="item-head">
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<span class="kind-badge kind-builtin">function</span>
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<h1 id="top">fixed</h1>
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</div>
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<code class="sig">fixed(x) -> fixed</code>
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<div class="desc"><p>Converts an integer into a <code>fixed</code> value (Ludic's Q16.16 fixed-point type), so it can take part in fractional arithmetic. <code>fixed</code> is how you carry deterministic sub-pixel precision for smooth movement and physics-like accumulation; a <code>float</code> or <code>double</code> converts too, truncated toward zero to Q16.16. Use <code>fixed</code> when you need to combine an <code>int</code> with fixed-point values or divide to get a fraction — for example <code>fixed(1) / fixed(4)</code> is <code>0.25</code>. Convert back to a whole number for drawing with <code>flr</code>.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-x"><code class="pname">x</code><span class="pdesc">the integer (or float) to convert</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program SmoothAccumulate {
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handler ComputeStep phase Start {
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let full_speed = fixed(3)
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let half_speed = full_speed / fixed(2)
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let two_steps = half_speed + half_speed
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print(floor(two_steps))
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}
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}</pre></div>
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<script src="ludic-highlight.js"></script>
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<script>Ludic.highlightAll(); Ludic.installCards(); Ludic.flashTarget();</script>
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