Quat.Slerp

static Quat Slerp(Quat a, Quat b, float slerp)

   
Quat a Start quaternion, should be normalized/unit length.
Quat b End quaternion, should be normalized/unit length.
float slerp The interpolation amount! This’ll be a if 0, and b if 1. Unclamped.
RETURNS: Quat A blend between the two quaternions!

Spherical Linear intERPolation. Interpolates between two quaternions! Both Quats should be normalized/unit quaternions, or you may get unexpected results.