---
title: "init(sourceGradient:sourceImage:gradientState:descriptor:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpscnnneurongradientnode/init(sourcegradient:sourceimage:gradientstate:descriptor:)"
---

# init(sourceGradient:sourceImage:gradientState:descriptor:)

## Declaration

```swift
init(sourceGradient: MPSNNImageNode, sourceImage: MPSNNImageNode, gradientState: MPSNNGradientStateNode, descriptor: MPSNNNeuronDescriptor)
```