A Mesh is defined by a set of control points and the many n-sided polygons as needed. This article eXplains how to define a Mesh...., 1 , 2 , 3 ]) # Right side (X+) mesh . create_polygon ([ 1 ...5 , 4 , 7 , 6 ]) # Left side (X-) mesh . create_polygon ([ 4 ...