triangulate will take an ordered set of nodes in the current 2d mesh object that define a perimeter of a polygon and create a trangulation of the polygon. The nodes are assumed to lie in the xy plane; the z coordinate is ignored. No checks are performed to verify that the nodes define a legal perimeter (i.e. that segments of the perimeter do not cross). The code will connect the last node to the first node to complete the perimeter.
triangulate [/clockwise counterclockwise]
clockwise is the default. Orientation is defined with the viewer above the xy plane.