---
title: "ShaderGraph.Node.NodeData.definition(_:)"
framework: realitykit
role: symbol
role_heading: Case
platforms: [iOS 27.0+, iPadOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: "realitykit/shadergraph/node/nodedata/definition(_:)"
---

# ShaderGraph.Node.NodeData.definition(_:)

A node defined by a ShaderGraph.NodeDefinition from a ShaderGraph.NodeLibrary.

## Declaration

```swift
case definition(ShaderGraph.NodeDefinition)
```