---
title: "simd_slerp_longest(_:_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_slerp_longest(_:_:_:)-816ko"
---

# simd_slerp_longest(_:_:_:)

## Declaration

```swift
func simd_slerp_longest(_ q0: simd_quath, _ q1: simd_quath, _ t: Float16) -> simd_quath
```

## Discussion

Discussion Spherical linear interpolation along the longest arc between quaternions q0 and q1.