Column grid types

Variables
const int	Bottom = 2
	Bottom face of a column.
const int	Cut = 4
	Faces appearing as a result of cutting a column by other objects.
const int	Side = 1
	Side faces of a column.
const int	Top = 3
	Top face of a column.
const int	Undefined = 0
	Undefined.

Possible grid types for a Column mesh