+bool StdMeshers_Sweeper::ComputeNodesOnStraight()
+{
+ prepareTopBotDelaunay();
+
+ const SMDS_MeshNode *botNode, *topNode;
+ const BRepMesh_Triangle *topTria;
+ double botBC[3], topBC[3]; // barycentric coordinates
+ int botTriaNodes[3], topTriaNodes[3];
+ bool checkUV = true;
+
+ int nbInternalNodes = myIntColumns.size();
+ myBotDelaunay->InitTraversal( nbInternalNodes );
+
+ while (( botNode = myBotDelaunay->NextNode( botBC, botTriaNodes )))
+ {
+ TNodeColumn* column = myIntColumns[ myNodeID2ColID( botNode->GetID() )];
+
+ // find a Delaunay triangle containing the topNode
+ topNode = column->back();
+ gp_XY topUV = myHelper->GetNodeUV( myTopFace, topNode, NULL, &checkUV );
+ // get a starting triangle basing on that top and bot boundary nodes have same index
+ topTria = myTopDelaunay->GetTriangleNear( botTriaNodes[0] );
+ topTria = myTopDelaunay->FindTriangle( topUV, topTria, topBC, topTriaNodes );
+ if ( !topTria )
+ return false;
+
+ // create nodes along a line
+ SMESH_NodeXYZ botP( botNode ), topP( topNode );
+ for ( size_t iZ = 0; iZ < myZColumns[0].size(); ++iZ )
+ {
+ // use barycentric coordinates as weight of Z of boundary columns
+ double botZ = 0, topZ = 0;
+ for ( int i = 0; i < 3; ++i )
+ {
+ botZ += botBC[i] * myZColumns[ botTriaNodes[i] ][ iZ ];
+ topZ += topBC[i] * myZColumns[ topTriaNodes[i] ][ iZ ];
+ }
+ double rZ = double( iZ + 1 ) / ( myZColumns[0].size() + 1 );
+ double z = botZ * ( 1 - rZ ) + topZ * rZ;
+ gp_XYZ p = botP * ( 1 - z ) + topP * z;
+ (*column)[ iZ+1 ] = myHelper->AddNode( p.X(), p.Y(), p.Z() );
+ }
+ }
+
+ return myBotDelaunay->NbVisitedNodes() == nbInternalNodes;
+}
+
+//================================================================================
+/*!
+ * \brief Compute Z of nodes of a straight column
+ */
+//================================================================================
+
+void StdMeshers_Sweeper::fillZColumn( TZColumn& zColumn,
+ TNodeColumn& nodes )