Normal classes: CrackCodeC Crackcode or Freeman code BVertexC Boundary vertex EdgeC Elementary boundary edge BoundaryC Crack code boundary Normal functions: CrackStep(const Index2dC &,CrackCodeT) CrackDirection(CrackCodeT) Crackcode or Freeman code operator <<(ostream &,const EdgeC &) Writes the elementary edge 'e' into the output stream 's'. operator <<(ostream &,const BoundaryC &) Line2Boundary(const BVertexC &,const BVertexC &)