---
title: "simd_spline(_:_:_:_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_spline(_:_:_:_:_:)-4ojmq"
---

# simd_spline(_:_:_:_:_:)

## Declaration

```swift
func simd_spline(_ q0: simd_quath, _ q1: simd_quath, _ q2: simd_quath, _ q3: simd_quath, _ t: Float16) -> simd_quath
```

## Discussion

Discussion Interpolate between quaternions along a spherical cubic spline. The function interpolates between q1 and q2. q0 is the left endpoint of the previous interval, and q3 is the right endpoint of the next interval. Use this function to smoothly interpolate between a sequence of rotations.