x = sin * axis.x; y = sin * axis.y; z = sin * axis.z;
x = sin * normAxis.x; y = sin * normAxis.y; z = sin * normAxis.z;
    public void fromAngleAxis(float angle, Vector3f axis) {        float halfAngle = 0.5f * angle;        float sin = (float) Math.sin(halfAngle);        w = (float) Math.cos(halfAngle);        x = sin * axis.x;        y = sin * axis.y;        z = sin * axis.z;    }