---
title: "dilationRates(forSourceIndex:)"
framework: metalperformanceshaders
role: symbol
role_heading: Instance Method
path: "metalperformanceshaders/mpsndarraymultiarybase/dilationrates(forsourceindex:)"
---

# dilationRates(forSourceIndex:)

## Declaration

```swift
func dilationRates(forSourceIndex sourceIndex: Int) -> MPSNDArraySizes
```