simd_quaternion(_:_:)
Declaration
func simd_quaternion(_ from: simd_half3, _ to: simd_half3) -> simd_quathParameters
- from:
A normalized three-element vector.
- to:
A normalized three-element vector.
Discussion
Construct a quaternion that rotates from one vector to another.
The rotation axis is simd_cross(from, to). If from and to point in opposite directions (to within machine precision), an arbitrary rotation axis is chosen, and the angle is pi radians.