Advanced: Combine 3D-SNFG with a Trajectory Smoothing Window

The internal averaging VMD applies to coordinates to achieve Trajectory Smoothing via the graphical Representations window is not currently accessible to the 3D-SNFG script; however, it is possible to prepare a version of the carbohydrate-containing trajectory with smoothing applied by using Trajectory Smooth within the Tk Console. This additional script produces a copy of the trajectory containing the average coordinates, which 3D-SNFG can then draw.