CNAT - Contact Attachment

In multiple places the engine uses ContactAttachment values (a bitmask) to manage the orientation of objects and processes. For example, a vertex of an object can have the CNAT bit left. If that object has

Bit	Value	CNAT	Description
0	1	CNAT_Left	Direction: Left
1	2	CNAT_Right	Direction: Right
2	4	CNAT_Top	Direction: Up
3	8	CNAT_Bottom	Direction: Down
4	16	CNAT_Center	Direction: Center (not for attachment)
5	32	CNAT_MultiAttach	Special flag: new attachment behaviour for objects with the same direction value at several vertices (from version 4.95.4).
6	64	CNAT_NoCollision	Extra flag: non-colliding vertex (from version 4.95.4)

CNAT: