---
title: "simd_smoothstep(_:_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_smoothstep(_:_:_:)-9hwr9"
---

# simd_smoothstep(_:_:_:)

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

## Declaration

```swift
func simd_smoothstep(_ edge0: simd_double3, _ edge1: simd_double3, _ x: simd_double3) -> simd_double3
```

## See Also

### Interpolation Functions

- [simd_mix(_:_:_:)](simd/simd_mix(_:_:_:)-46dv1.md)
- [mix(_:_:t:)](simd/mix(_:_:t:)-1dp7m.md)
- [mix(_:_:t:)](simd/mix(_:_:t:)-5ifg3.md)
- [smoothstep(_:edge0:edge1:)](simd/smoothstep(_:edge0:edge1:)-5ih1o.md)