How does three.js handle rotations by non-unit quaternions?

[hofk]

See also

Quaternion - method .setFromBasis( e1, e2, e3 )

These posts and examples are about movement on a curve. Struggling with paths - #14 by hofk Car Racing - For lovers of fast cars! MotionAlongCurve MovementOnCurve CarRacing However, the solution via matrices requires computational effort. I have been looking for a solution with quaternions that requires fewer formula steps. The solution is a new method in the quaternion class. I added it to three.module.129.Quaternion.js in the example BasisToQuaternion. This makes the calculat…