Geometry bitfields

Definition of bits used to describe geometry types. Most common bits are contained in the low byte,extra bytes are needed for less common cases. Some bits are reused, depending on the context.

00000001	Faces
00000002	Edges
00000004	Lines
00000008	Markers
00000010	Text
00000020	Windows
00000040	Images
00000080	indicates additional byte(s) required
00000100	Ambient for color settings, String Cursors otherwise
00000200	Lights for color settings, Face Lighting otherwise
00000400	Face Contrast for color settings, Edge Lighting otherwise
00000800	Window Contrast for color settings, Marker Lighting otherwise
00001000	Front side for color settings, Silhouette Edges otherwise
00002000	Back side for color settings, Perimeter Edges otherwise
00004000	Mesh Quad Edges for visibility settings, Vertex otherwise
00008000	Hard Edges for visibility settings, indicates additional byte(s) required for color settings
00010000	Cutting Planes
00020000	Shadow Emission
00040000	Shadow Casting
00080000	Shadow Receiving
00100000	Cut Edges
00200000	Vertex for visibility settings
00400000	Cut Faces