---
title: "init(source:a:b:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpscnnneuronrelunnode/init(source:a:b:)"
---

# init(source:a:b:)

## Declaration

```swift
init(source sourceNode: MPSNNImageNode, a: Float, b: Float)
```