/// <summary>
        /// Called by Unity. Updates controller.
        /// </summary>
        /// <remarks>Must be call after animation update.</remarks>
        private void LateUpdate()
        {
            var deltaTime = Time.deltaTime;


            // Use fixed delta time if required.
            if (CubismPhysics.UseFixedDeltaTime)
            {
                deltaTime = Time.fixedDeltaTime;
            }


            // Evaluate rig.
            Rig.Evaluate(deltaTime);
        }