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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="A render node that can be added to a `RenderGraph`."><meta name="keywords" content="rust, rustlang, rust-lang, Node"><title>Node in maplibre::render::graph - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script src="../../../crates.js"></script><script defer src="../../../main.js"></script>
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<nav class="sidebar"><a class="sidebar-logo" href="../../../maplibre/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div>
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</a><h2 class="location"><a href="#">Node</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#required-methods">Required Methods</a></h3><ul><li><a href="#tymethod.run">run</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#provided-methods">Provided Methods</a></h3><ul><li><a href="#method.input">input</a></li><li><a href="#method.output">output</a></li><li><a href="#method.update">update</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#implementations">Methods</a></h3><ul><li><a href="#method.downcast">downcast</a></li><li><a href="#method.downcast_mut">downcast_mut</a></li><li><a href="#method.downcast_rc">downcast_rc</a></li><li><a href="#method.downcast_ref">downcast_ref</a></li><li><a href="#method.is">is</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#implementors">Implementors</a></h3></div></section><h2 class="location"><a href="index.html">In maplibre::render::graph</a></h2><div id="sidebar-vars" data-name="Node" data-ty="trait" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../../maplibre/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><nav class="sub"><div class="theme-picker hidden"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="22" height="22" alt="Pick another theme!" src="../../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="main-heading">
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<h1 class="fqn"><span class="in-band">Trait <a href="../../index.html">maplibre</a>::<wbr><a href="../index.html">render</a>::<wbr><a href="index.html">graph</a>::<wbr><a class="trait" href="#">Node</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#45-70">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust trait"><code>pub trait Node: Downcast + <a class="trait" href="https://doc.rust-lang.org/1.62.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/1.62.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> + 'static {
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fn <a href="#tymethod.run" class="fnname">run</a>(<br> &self, <br> graph: &mut <a class="struct" href="context/struct.RenderGraphContext.html" title="struct maplibre::render::graph::context::RenderGraphContext">RenderGraphContext</a><'_>, <br> render_context: &mut <a class="struct" href="node/struct.RenderContext.html" title="struct maplibre::render::graph::node::RenderContext">RenderContext</a><'_>, <br> state: &<a class="struct" href="../struct.RenderState.html" title="struct maplibre::render::RenderState">RenderState</a><br> ) -> <a class="enum" href="https://doc.rust-lang.org/1.62.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.62.0/std/primitive.unit.html">()</a>, <a class="enum" href="node/enum.NodeRunError.html" title="enum maplibre::render::graph::node::NodeRunError">NodeRunError</a>>;
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fn <a href="#method.input" class="fnname">input</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="struct" href="node_slot/struct.SlotInfo.html" title="struct maplibre::render::graph::node_slot::SlotInfo">SlotInfo</a>> { ... }
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<span class="item-spacer"></span> fn <a href="#method.output" class="fnname">output</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="struct" href="node_slot/struct.SlotInfo.html" title="struct maplibre::render::graph::node_slot::SlotInfo">SlotInfo</a>> { ... }
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<span class="item-spacer"></span> fn <a href="#method.update" class="fnname">update</a>(&mut self, _state: &mut <a class="struct" href="../struct.RenderState.html" title="struct maplibre::render::RenderState">RenderState</a>) { ... }
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}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A render node that can be added to a <a href="graph/struct.RenderGraph.html"><code>RenderGraph</code></a>.</p>
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<p>Nodes are the fundamental part of the graph and used to extend its functionality, by
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generating draw calls and/or running subgraphs.
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They are added via the <code>render_graph::add_node(my_node)</code> method.</p>
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<p>To determine their position in the graph and ensure that all required dependencies (inputs)
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are already executed, <a href="edge/enum.Edge.html"><code>Edges</code></a> are used.</p>
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<p>A node can produce outputs used as dependencies by other nodes.
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Those inputs and outputs are called slots and are the default way of passing render data
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inside the graph. For more information see <a href="node_slot/enum.SlotType.html"><code>SlotType</code></a>.</p>
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</div></details><h2 id="required-methods" class="small-section-header">Required Methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="tymethod.run" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#64-69">source</a></div><h4 class="code-header">fn <a href="#tymethod.run" class="fnname">run</a>(<br> &self, <br> graph: &mut <a class="struct" href="context/struct.RenderGraphContext.html" title="struct maplibre::render::graph::context::RenderGraphContext">RenderGraphContext</a><'_>, <br> render_context: &mut <a class="struct" href="node/struct.RenderContext.html" title="struct maplibre::render::graph::node::RenderContext">RenderContext</a><'_>, <br> state: &<a class="struct" href="../struct.RenderState.html" title="struct maplibre::render::RenderState">RenderState</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/1.62.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.62.0/std/primitive.unit.html">()</a>, <a class="enum" href="node/enum.NodeRunError.html" title="enum maplibre::render::graph::node::NodeRunError">NodeRunError</a>></h4></div></summary><div class="docblock"><p>Runs the graph node logic, issues draw calls, updates the output slots and
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optionally queues up subgraphs for execution. The graph data, input and output values are
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passed via the <a href="context/struct.RenderGraphContext.html" title="RenderGraphContext"><code>RenderGraphContext</code></a>.</p>
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</div></details></div><h2 id="provided-methods" class="small-section-header">Provided Methods<a href="#provided-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="method.input" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#48-50">source</a></div><h4 class="code-header">fn <a href="#method.input" class="fnname">input</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="struct" href="node_slot/struct.SlotInfo.html" title="struct maplibre::render::graph::node_slot::SlotInfo">SlotInfo</a>></h4></div></summary><div class="docblock"><p>Specifies the required input slots for this node.
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They will then be available during the run method inside the <a href="context/struct.RenderGraphContext.html" title="RenderGraphContext"><code>RenderGraphContext</code></a>.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="method.output" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#54-56">source</a></div><h4 class="code-header">fn <a href="#method.output" class="fnname">output</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="struct" href="node_slot/struct.SlotInfo.html" title="struct maplibre::render::graph::node_slot::SlotInfo">SlotInfo</a>></h4></div></summary><div class="docblock"><p>Specifies the produced output slots for this node.
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They can then be passed one inside <a href="context/struct.RenderGraphContext.html" title="RenderGraphContext"><code>RenderGraphContext</code></a> during the run method.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="method.update" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#59">source</a></div><h4 class="code-header">fn <a href="#method.update" class="fnname">update</a>(&mut self, _state: &mut <a class="struct" href="../struct.RenderState.html" title="struct maplibre::render::RenderState">RenderState</a>)</h4></div></summary><div class="docblock"><p>Updates internal node state using the current <a href="../struct.RenderState.html" title="RenderState"><code>RenderState</code></a> prior to the run method.</p>
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</div></details></div><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#72">source</a></span><a href="#impl" class="anchor"></a><h3 class="code-header in-band">impl dyn <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#72">source</a></span><a href="#method.is" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.is" class="fnname">is</a><__T: <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a>>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.62.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if the trait object wraps an object of type <code>__T</code>.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.downcast" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#72">source</a></span><a href="#method.downcast" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.downcast" class="fnname">downcast</a><__T: <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a>>(self: <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><Self>) -> <a class="enum" href="https://doc.rust-lang.org/1.62.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><__T>, <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><Self>></h4></section></summary><div class="docblock"><p>Returns a boxed object from a boxed trait object if the underlying object is of type
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<code>__T</code>. Returns the original boxed trait if it isn’t.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.downcast_rc" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#72">source</a></span><a href="#method.downcast_rc" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.downcast_rc" class="fnname">downcast_rc</a><__T: <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a>>(self: <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/rc/struct.Rc.html" title="struct alloc::rc::Rc">Rc</a><Self>) -> <a class="enum" href="https://doc.rust-lang.org/1.62.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/rc/struct.Rc.html" title="struct alloc::rc::Rc">Rc</a><__T>, <a class="struct" href="https://doc.rust-lang.org/1.62.0/alloc/rc/struct.Rc.html" title="struct alloc::rc::Rc">Rc</a><Self>></h4></section></summary><div class="docblock"><p>Returns an <code>Rc</code>-ed object from an <code>Rc</code>-ed trait object if the underlying object is of
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type <code>__T</code>. Returns the original <code>Rc</code>-ed trait if it isn’t.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.downcast_ref" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#72">source</a></span><a href="#method.downcast_ref" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.downcast_ref" class="fnname">downcast_ref</a><__T: <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a>>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.62.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.62.0/std/primitive.reference.html">&</a>__T></h4></section></summary><div class="docblock"><p>Returns a reference to the object within the trait object if it is of type <code>__T</code>, or
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<code>None</code> if it isn’t.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.downcast_mut" class="method has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#72">source</a></span><a href="#method.downcast_mut" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.downcast_mut" class="fnname">downcast_mut</a><__T: <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a>>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.62.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.62.0/std/primitive.reference.html">&mut </a>__T></h4></section></summary><div class="docblock"><p>Returns a mutable reference to the object within the trait object if it is of type
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<code>__T</code>, or <code>None</code> if it isn’t.</p>
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</div></details></div></details></div><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"><section id="impl-Node" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/main_pass.rs.html#114-125">source</a></span><a href="#impl-Node" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a> for <a class="struct" href="../main_pass/struct.MainPassDriverNode.html" title="struct maplibre::render::main_pass::MainPassDriverNode">MainPassDriverNode</a></h3></section><section id="impl-Node-1" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/main_pass.rs.html#33-110">source</a></span><a href="#impl-Node-1" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a> for <a class="struct" href="../main_pass/struct.MainPassNode.html" title="struct maplibre::render::main_pass::MainPassNode">MainPassNode</a></h3></section><section id="impl-Node-2" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/graph.rs.html#549-570">source</a></span><a href="#impl-Node-2" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a> for <a class="struct" href="graph/struct.GraphInputNode.html" title="struct maplibre::render::graph::graph::GraphInputNode">GraphInputNode</a></h3></section><section id="impl-Node-3" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../../src/maplibre/render/graph/node.rs.html#325-334">source</a></span><a href="#impl-Node-3" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="node/trait.Node.html" title="trait maplibre::render::graph::node::Node">Node</a> for <a class="struct" href="node/struct.EmptyNode.html" title="struct maplibre::render::graph::node::EmptyNode">EmptyNode</a></h3></section></div><script type="text/javascript" src="../../../implementors/maplibre/render/graph/node/trait.Node.js" data-ignore-extern-crates="" async></script></section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="maplibre" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.62.0 (a8314ef7d 2022-06-27)" ></div>
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