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* Visual and Computer Graphics Library                            o     o   *
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This folders contains most common FACE configuration files
The name of the file specify the members that are added to the vertex class
The name is a sequence of letters, in strict alphabetical order.
The possible admitted letters pairs are

FA - face-face adjacency
FC - Per-Face Color
FN - Per-Face Normal
FQ - Per-Face Quality
VA - Vertex-face adjacency
WC - Per-Wedge Color
WN - Per-Wedge Normal
WQ - Per-Wedge Quality
WT - Per-Wedge Texture Coords
SA - Shared Vertex-Face and Face-Face Adjacency
RT - Data for Optimized Point-Face Distance and Ray-Tracing Stuff

E.g. 

#include<vcg/simplex/vertex/with/fafnwc.h> 

generate a type 
VertexFAFNWC<VertexType> 

that can store F-F adjacency, Per face normal color and per wedge color.