return true;
}
- typedef list< pair< const SMDS_MeshNode*, const BRepMesh_Triangle* > > TNodeTriaList;
-
- //================================================================================
- /*!
- * \brief Add in-FACE nodes surrounding a given node to a queue
- */
- //================================================================================
-
- void addCloseNodes( const SMDS_MeshNode* srcNode,
- const BRepMesh_Triangle* bmTria,
- const int srcFaceID,
- TNodeTriaList & noTriQueue )
- {
- // find in-FACE nodes
- SMDS_ElemIteratorPtr elems = srcNode->GetInverseElementIterator(SMDSAbs_Face);
- while ( elems->more() )
- {
- const SMDS_MeshElement* elem = elems->next();
- if ( elem->getshapeId() == srcFaceID )
- {
- for ( int i = 0, nb = elem->NbNodes(); i < nb; ++i )
- {
- const SMDS_MeshNode* n = elem->GetNode( i );
- if ( !n->isMarked() )
- noTriQueue.push_back( make_pair( n, bmTria ));
- }
- }
- }
- }
-
- //================================================================================
- /*!
- * \brief Find a delauney triangle containing a given 2D point and return
- * barycentric coordinates within the found triangle
- */
- //================================================================================
-
- const BRepMesh_Triangle* findTriangle( const gp_XY& uv,
- const BRepMesh_Triangle* bmTria,
- Handle(BRepMesh_DataStructureOfDelaun)& triaDS,
- double bc[3] )
- {
- int nodeIDs[3];
- gp_XY nodeUVs[3];
- int linkIDs[3];
- Standard_Boolean ori[3];
-
- while ( bmTria )
- {
- // check bmTria
-
- triaDS->ElementNodes( *bmTria, nodeIDs );
- nodeUVs[0] = triaDS->GetNode( nodeIDs[0] ).Coord();
- nodeUVs[1] = triaDS->GetNode( nodeIDs[1] ).Coord();
- nodeUVs[2] = triaDS->GetNode( nodeIDs[2] ).Coord();
-
- SMESH_MeshAlgos::GetBarycentricCoords( uv,
- nodeUVs[0], nodeUVs[1], nodeUVs[2],
- bc[0], bc[1] );
- if ( bc[0] >= 0 && bc[1] >= 0 && bc[0] + bc[1] <= 1 )
- {
- bc[2] = 1 - bc[0] - bc[1];
- return bmTria;
- }
-
- // look for a neighbor triangle, which is adjacent to a link intersected
- // by a segment( triangle center -> uv )
-
- gp_XY gc = ( nodeUVs[0] + nodeUVs[1] + nodeUVs[2] ) / 3.;
- gp_XY seg = uv - gc;
-
- bmTria->Edges( linkIDs, ori );
- int triaID = triaDS->IndexOf( *bmTria );
- bmTria = 0;
-
- for ( int i = 0; i < 3; ++i )
- {
- const BRepMesh_PairOfIndex & triIDs = triaDS->ElementsConnectedTo( linkIDs[i] );
- if ( triIDs.Extent() < 2 )
- continue; // no neighbor triangle
-
- // check if a link intersects gc2uv
- const BRepMesh_Edge & link = triaDS->GetLink( linkIDs[i] );
- const BRepMesh_Vertex & n1 = triaDS->GetNode( link.FirstNode() );
- const BRepMesh_Vertex & n2 = triaDS->GetNode( link.LastNode() );
- gp_XY uv1 = n1.Coord();
- gp_XY lin = n2.Coord() - uv1; // link direction
-
- double crossSegLin = seg ^ lin;
- if ( Abs( crossSegLin ) < std::numeric_limits<double>::min() )
- continue; // parallel
-
- double uSeg = ( uv1 - gc ) ^ lin / crossSegLin;
- if ( 0. <= uSeg && uSeg <= 1. )
- {
- bmTria = & triaDS->GetElement( triIDs.Index( 1 + ( triIDs.Index(1) == triaID )));
- break;
- }
- }
- }
- return bmTria;
- }
-
- //================================================================================
- /*!
- * \brief Morph mesh on the target face to lie within FACE boundary w/o distortion
- *
- * algo:
- * - make a CDT on the src FACE
- * - find a triangle containing a src node and get its barycentric coordinates
- * - move the node to a point with the same barycentric coordinates in a corresponding
- * tgt triangle
- */
- //================================================================================
-
- bool morph( SMESH_MesherHelper& tgtHelper,
- const TopoDS_Face& tgtFace,
- const TopoDS_Face& srcFace,
- const TSideVector& tgtWires,
- const TSideVector& srcWires,
- const TAssocTool::TNodeNodeMap& src2tgtNodes )
- {
- if ( srcWires.size() != tgtWires.size() ) return false;
- if ( srcWires.size() == 1 ) return false; // tmp
-
- // count boundary points
- int iP = 1, nbP = 0;
- for ( size_t iW = 0; iW < srcWires.size(); ++iW )
- nbP += srcWires[iW]->NbPoints() - 1; // 1st and last points coincide
-
- // fill boundary points
- BRepMesh::Array1OfVertexOfDelaun srcVert( 1, 1 + nbP ), tgtVert( 1, 1 + nbP );
- vector< const SMDS_MeshNode* > bndSrcNodes( nbP + 1 ); bndSrcNodes[0] = 0;
- BRepMesh_Vertex v( 0, 0, BRepMesh_Frontier );
- for ( size_t iW = 0; iW < srcWires.size(); ++iW )
- {
- const UVPtStructVec& srcPnt = srcWires[iW]->GetUVPtStruct();
- const UVPtStructVec& tgtPnt = tgtWires[iW]->GetUVPtStruct();
- if ( srcPnt.size() != tgtPnt.size() ) return false;
-
- for ( int i = 0, nb = srcPnt.size() - 1; i < nb; ++i, ++iP )
- {
- bndSrcNodes[ iP ] = srcPnt[i].node;
- srcPnt[i].node->setIsMarked( true );
-
- v.ChangeCoord() = srcPnt[i].UV();
- srcVert( iP ) = v;
- v.ChangeCoord() = tgtPnt[i].UV();
- tgtVert( iP ) = v;
- }
- }
- // triangulate the srcFace in 2D
- BRepMesh_Delaun delauney( srcVert );
- Handle(BRepMesh_DataStructureOfDelaun) triaDS = delauney.Result();
-
- Handle(ShapeAnalysis_Surface) tgtSurface = tgtHelper.GetSurface( tgtFace );
- SMESHDS_Mesh* srcMesh = srcWires[0]->GetMesh()->GetMeshDS();
- SMESHDS_Mesh* tgtMesh = tgtHelper.GetMeshDS();
- const SMDS_MeshNode *srcNode, *tgtNode;
- const BRepMesh_Triangle *bmTria;
-
- // un-mark internal src nodes; later we will mark moved nodes
- SMDS_NodeIteratorPtr nIt = srcMesh->MeshElements( srcFace )->GetNodes();
- if ( !nIt || !nIt->more() ) return true;
- while ( nIt->more() )
- ( srcNode = nIt->next() )->setIsMarked( false );
-
- // initialize a queue of nodes with starting triangles
- const int srcFaceID = srcNode->getshapeId();
- TNodeTriaList noTriQueue;
- size_t iBndSrcN = 1;
- for ( ; iBndSrcN < bndSrcNodes.size() && noTriQueue.empty(); ++iBndSrcN )
- {
- // get a triangle
- const BRepMesh::ListOfInteger & linkIds = triaDS->LinksConnectedTo( iBndSrcN );
- const BRepMesh_PairOfIndex & triaIds = triaDS->ElementsConnectedTo( linkIds.First() );
- const BRepMesh_Triangle& tria = triaDS->GetElement( triaIds.Index(1) );
-
- addCloseNodes( bndSrcNodes[ iBndSrcN ], &tria, srcFaceID, noTriQueue );
- }
-
- // Move tgt nodes
-
- double bc[3]; // barycentric coordinates
- int nodeIDs[3];
- bool checkUV = true;
- const SMDS_FacePosition* pos;
-
- while ( !noTriQueue.empty() )
- {
- srcNode = noTriQueue.front().first;
- bmTria = noTriQueue.front().second;
- noTriQueue.pop_front();
- if ( srcNode->isMarked() )
- continue;
- srcNode->setIsMarked( true );
-
- // find a delauney triangle containing the src node
- gp_XY uv = tgtHelper.GetNodeUV( srcFace, srcNode, NULL, &checkUV );
- bmTria = findTriangle( uv, bmTria, triaDS, bc );
- if ( !bmTria )
- continue;
-
- // compute new coordinates for a corresponding tgt node
- gp_XY uvNew( 0., 0. ), nodeUV;
- triaDS->ElementNodes( *bmTria, nodeIDs );
- for ( int i = 0; i < 3; ++i )
- uvNew += bc[i] * tgtVert( nodeIDs[i]).Coord();
- gp_Pnt xyz = tgtSurface->Value( uvNew );
-
- // find and move tgt node
- TAssocTool::TNodeNodeMap::const_iterator n2n = src2tgtNodes.find( srcNode );
- if ( n2n == src2tgtNodes.end() ) continue;
- tgtNode = n2n->second;
- tgtMesh->MoveNode( tgtNode, xyz.X(), xyz.Y(), xyz.Z() );
-
- if (( pos = dynamic_cast< const SMDS_FacePosition* >( tgtNode->GetPosition() )))
- const_cast<SMDS_FacePosition*>( pos )->SetParameters( uvNew.X(), uvNew.Y() );
-
- addCloseNodes( srcNode, bmTria, srcFaceID, noTriQueue );
-
- // assure that all src nodes are visited
- for ( ; iBndSrcN < bndSrcNodes.size() && noTriQueue.empty(); ++iBndSrcN )
- {
- const BRepMesh::ListOfInteger & linkIds = triaDS->LinksConnectedTo( iBndSrcN );
- const BRepMesh_PairOfIndex & triaIds = triaDS->ElementsConnectedTo( linkIds.First() );
- const BRepMesh_Triangle& tria = triaDS->GetElement( triaIds.Index(1) );
- addCloseNodes( bndSrcNodes[ iBndSrcN ], &tria, srcFaceID, noTriQueue );
- }
- }
-
- return true;
- }
-
//=======================================================================
/*
* Set initial association of VERTEXes for the case of projection
// ----------------------------------------------------------------
if ( helper.IsDistorted2D( tgtSubMesh, /*checkUV=*/false, &helper ))
{
- morph( helper, tgtFace, srcFace, tgtWires, srcWires, _src2tgtNodes );
+ TAssocTool::Morph morph( srcWires );
+ morph.Perform( helper, tgtWires, helper.GetSurface( tgtFace ),
+ _src2tgtNodes, /*moveAll=*/true );
if ( !fixDistortedFaces( helper, tgtWires ))
return error("Invalid mesh generated");
