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<!doctype html>
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<title>spawn — Ludic</title>
<meta name="description" content="Create a model instance carrying the listed properties, seeding their fields.">
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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#ecs">Entities &amp; the ECS</a> <span>›</span> <span class="here">spawn</span></div>
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<h1 id="top">spawn</h1>
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<code class="sig">spawn Label { Prop { field: v }; … }</code>
<div class="desc"><p>A <code>spawn</code> creates a new model instance and attaches the listed properties, each field starting from its default and then taking any overrides you give. The <code>Label</code> after <code>spawn</code> is just a readable name for the instance at that call site — it does not have to be a declared model — while the <code>{Prop { … }; …}</code> block is what actually determines which properties the instance carries. If you <code>spawn</code> a declared <code>model</code>, every property in that model comes along automatically. A newly spawned instance is visible to matching queries immediately, and one spawned mid-loop at a higher id is even visited in the same tick, so spawn into a later phase if you want to defer that.</p></div>
<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Waves {
property Position { column: int = 0, row: int = 0 }
property Velocity { delta_x: int = 0, delta_y: int = 0 }
property Health { current: int = 100, maximum: int = 100 }
model Enemy { Position, Velocity, Health }
handler SpawnWave phase Start {
spawn Grunt { Position { column: 18, row: 4 }; Velocity { delta_x: -1 }; Health { current: 20 } }
spawn Brute { Position { column: 18, row: 9 }; Velocity { delta_x: -1 }; Health { current: 60 } }
}
}</pre></div>
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