+
+ // Try to orient internal wires (0020996)
+ if ( nbEInW1.size() > 1 )
+ {
+ // Try by UV similarity. Check that Vec(VV1[0],VV1[1]) in 2D on face1 is the same
+ // as Vec(VV2[0],VV2[1]) on face2
+ double vTol = BRep_Tool::Tolerance( VV1[0] );
+ BRepAdaptor_Surface surface1( face1, false );
+ double vTolUV =
+ surface1.UResolution( vTol ) + surface1.VResolution( vTol ); // let's be tolerant
+ gp_Pnt2d v1UV = BRep_Tool::Parameters( VV1[0], face1 );
+ gp_Pnt2d v2UV = BRep_Tool::Parameters( VV2[0], face2 );
+ gp_Pnt2d v1UV1 = BRep_Tool::Parameters( VV1[1], face1 );
+ gp_Pnt2d v2UV1 = BRep_Tool::Parameters( VV2[1], face2 );
+ gp_Vec2d e1Vec( v1UV, v1UV1 );
+ gp_Vec2d e2Vec( v2UV, v2UV1 );
+ if ( Abs( e1Vec.X()-e2Vec.X()) < vTolUV && Abs( e1Vec.Y()-e2Vec.Y()) < vTolUV )
+ {
+ gp_XY dUV = v2UV.XY() - v1UV.XY();
+ // skip edges of the outer wire
+ list< int >::iterator nbEInW = nbEInW1.begin();
+ list< TopoDS_Edge >::iterator edge1Beg = edges1.begin(), edge2Beg = edges2.begin();
+ for ( int i = 0; i < *nbEInW; ++i )
+ ++edge1Beg, ++edge2Beg;
+ for ( ++nbEInW; nbEInW != nbEInW1.end(); ++nbEInW ) // loop on inner wires
+ {
+ // reach an end of edges of a current innner wire
+ list< TopoDS_Edge >::iterator edge1End = edge1Beg, edge2End = edge2Beg;
+ for ( int i = 0; i < *nbEInW; ++i )
+ ++edge1End, ++edge2End;
+ // rotate edges2 untill coincident with edges1 in 2D
+ v1UV = BRep_Tool::Parameters( TopExp::FirstVertex(*edge1Beg,true), face1 );
+ v2UV = BRep_Tool::Parameters( TopExp::LastVertex (*edge1Beg,true), face1 );
+ v1UV.ChangeCoord() += dUV;
+ v2UV.ChangeCoord() += dUV;
+ int i = *nbEInW;
+ while ( --i > 0 && !sameVertexUV( *edge2Beg, face2, 0, v1UV, vTolUV ))
+ edges2.splice( edge2End, edges2, edge2Beg++ ); // move edge2Beg to place before edge2End
+ // reverse edges2 if needed
+ if ( sameVertexUV( *edge2Beg, face2, 0, v1UV, vTolUV ) &&
+ !sameVertexUV( *edge2Beg, face2, 1, v2UV, vTolUV ))
+ {
+ Reverse( edges2 , *nbEInW, distance( edges2.begin(),edge2Beg ));
+ edge2End = edges2.begin();
+ std::advance( edge2End, std::accumulate( nbEInW1.begin(), nbEInW, *nbEInW));
+ }
+ // prepare to the next wire loop
+ edge1Beg = edge1End, edge2Beg = edge2End;
+ }
+ }
+ }
+ break; // OK
+
+ } // loop algos getting an outer wire
+
+ return nbEInW2.front();