void shift ( size_t nb, bool keepUnitOri, bool keepGrid=false );
int & nbNodeOut( int iSide ) { return side[ iSide ].nbNodeOut; }
bool findCell ( const gp_XY& uv, int & i, int & j );
void shift ( size_t nb, bool keepUnitOri, bool keepGrid=false );
int & nbNodeOut( int iSide ) { return side[ iSide ].nbNodeOut; }
bool findCell ( const gp_XY& uv, int & i, int & j );