---
title: "simd_smoothstep(_:_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_smoothstep(_:_:_:)-33ugy"
---

# simd_smoothstep(_:_:_:)

Returns an element-wise smoothly interpolated value between two vectors.

## Declaration

```swift
func simd_smoothstep(_ edge0: simd_float4, _ edge1: simd_float4, _ x: simd_float4) -> simd_float4
```

## See Also

### Interpolation Functions

- [simd_mix(_:_:_:)](simd/simd_mix(_:_:_:)-5fpv1.md)
- [mix(_:_:t:)](simd/mix(_:_:t:)-2uufx.md)
- [mix(_:_:t:)](simd/mix(_:_:t:)-8qz2g.md)
- [smoothstep(_:edge0:edge1:)](simd/smoothstep(_:edge0:edge1:)-3gx0q.md)