Floor grid types

Variables
const int	Renga::GridTypes::Floor::Undefined = 0
	Undefined.
const int	Renga::GridTypes::Floor::Side = 1
	Side faces of a floor.
const int	Renga::GridTypes::Floor::Bottom = 2
	Bottom face of a floor.
const int	Renga::GridTypes::Floor::Top = 3
	Top face of a floor.
const int	Renga::GridTypes::Floor::OpeningSide = 4
	Side faces appearing as a result of insertion of an aperture.
const int	Renga::GridTypes::Floor::OpeningBottom = 5
	Bottom face appearing as a result of insertion of an aperture.
const int	Renga::GridTypes::Floor::OpeningTop = 6
	Top face appearing as a result of insertion of an aperture.
const int	Renga::GridTypes::Floor::Cut = 7
	Faces appearing as a result of cutting a floor by other objects.

Possible grid types for a Floor mesh