void AddEdge(int NewEdgeID, int n1, int n2, int n12);
void AddFace(int NewFaceID, int n1, int n2, int n3,
int n12, int n23, int n31);
+ void AddFace(int NewFaceID, int n1, int n2, int n3,
+ int n12, int n23, int n31, int nCenter);
void AddFace(int NewFaceID, int n1, int n2, int n3, int n4,
int n12, int n23, int n34, int n41);
void AddFace(int NewFaceID, int n1, int n2, int n3, int n4,