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40 lines
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2.5 KiB
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<title>world_model_id — Ludic</title>
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<meta name="description" content="Resolve a model's name to its stable numeric id.">
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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 & the ECS</a> <span>›</span> <span class="here">world_model_id</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">world_model_id</h1>
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</div>
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<code class="sig">world_model_id(name) -> int</code>
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<div class="desc"><p><code>world_model_id</code> looks up a model by name and returns its stable numeric id, or a negative value if no model of that name exists. It is part of Ludic's reflection ABI — the dynamic, id-based view of the world that mods and tools use alongside the static <code>spawn</code>/<code>query</code> forms. You typically resolve a name to an id once and then feed that id to id-based calls such as <code>world_spawn</code> or <code>world_kind</code>. Because the id is stable for a given build, it is safe to cache in a <code>var</code>.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-name"><code class="pname">name</code><span class="pdesc">the model's name, as a string, e.g. <code>"Player"</code></span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program ResolveModel {
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property Position { column: int = 0, row: int = 0 }
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model Player { Position }
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handler Boot phase Start {
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spawn Hero { Position { column: 3, row: 3 } }
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}
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handler Inspect phase Update {
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let player_model = world_model_id("Player")
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Screen.status(string(player_model))
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}
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}</pre></div>
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