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

# init(source:a:b:c:)

## Declaration

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