Fix the direction issue if generating multiple layers of BCE particles from ANCF shell elements
Fix the direction issue if generating multiple layers of BCE particles from ANCF shell elements

rserban/chrono,projectchrono/chrono,projectchrono/chrono,projectchrono/chrono,rserban/chrono,rserban/chrono,projectchrono/chrono,projectchrono/chrono,rserban/chrono,rserban/chrono,rserban/chrono,rserban/chrono,projectchrono/chrono