From 1ea4e6ee790a9cca02f184dfb81c2cfb3775d3be Mon Sep 17 00:00:00 2001 From: eap Date: Wed, 23 Mar 2016 19:07:59 +0300 Subject: [PATCH] 23256: [CEA 1796] Merge nodes suppresses some elements --- src/SMESH/SMESH_MeshEditor.cxx | 570 +++++++++++++-------------------- 1 file changed, 214 insertions(+), 356 deletions(-) diff --git a/src/SMESH/SMESH_MeshEditor.cxx b/src/SMESH/SMESH_MeshEditor.cxx index e54f01846..a37950e41 100644 --- a/src/SMESH/SMESH_MeshEditor.cxx +++ b/src/SMESH/SMESH_MeshEditor.cxx @@ -7215,76 +7215,52 @@ int SMESH_MeshEditor::SimplifyFace (const vector& faceNod vector& quantities) const { int nbNodes = faceNodes.size(); - - if (nbNodes < 3) + while ( faceNodes[ 0 ] == faceNodes[ nbNodes-1 ] && nbNodes > 2 ) + --nbNodes; + if ( nbNodes < 3 ) return 0; + size_t prevNbQuant = quantities.size(); - set nodeSet; - - // get simple seq of nodes - vector simpleNodes( nbNodes ); - int iSimple = 0; - - simpleNodes[iSimple++] = faceNodes[0]; - for (int iCur = 1; iCur < nbNodes; iCur++) { - if (faceNodes[iCur] != simpleNodes[iSimple - 1]) { - simpleNodes[iSimple++] = faceNodes[iCur]; - nodeSet.insert( faceNodes[iCur] ); - } - } - int nbUnique = nodeSet.size(); - int nbSimple = iSimple; - if (simpleNodes[nbSimple - 1] == simpleNodes[0]) { - nbSimple--; - iSimple--; - } + vector< const SMDS_MeshNode* > simpleNodes; simpleNodes.reserve( nbNodes ); + map< const SMDS_MeshNode*, int > nodeIndices; // indices within simpleNodes + map< const SMDS_MeshNode*, int >::iterator nInd; - if (nbUnique < 3) - return 0; - - // separate loops - int nbNew = 0; - bool foundLoop = (nbSimple > nbUnique); - while (foundLoop) { - foundLoop = false; - set loopSet; - for (iSimple = 0; iSimple < nbSimple && !foundLoop; iSimple++) { - const SMDS_MeshNode* n = simpleNodes[iSimple]; - if (!loopSet.insert( n ).second) { - foundLoop = true; - - // separate loop - int iC = 0, curLast = iSimple; - for (; iC < curLast; iC++) { - if (simpleNodes[iC] == n) break; - } - int loopLen = curLast - iC; - if (loopLen > 2) { - // create sub-element - nbNew++; - quantities.push_back(loopLen); - for (; iC < curLast; iC++) { - poly_nodes.push_back(simpleNodes[iC]); - } - } - // shift the rest nodes (place from the first loop position) - for (iC = curLast + 1; iC < nbSimple; iC++) { - simpleNodes[iC - loopLen] = simpleNodes[iC]; + nodeIndices.insert( make_pair( faceNodes[0], 0 )); + simpleNodes.push_back( faceNodes[0] ); + for ( int iCur = 1; iCur < nbNodes; iCur++ ) + { + if ( faceNodes[ iCur ] != simpleNodes.back() ) + { + int index = simpleNodes.size(); + nInd = nodeIndices.insert( make_pair( faceNodes[ iCur ], index )).first; + int prevIndex = nInd->second; + if ( prevIndex < index ) + { + // a sub-loop found + int loopLen = index - prevIndex; + if ( loopLen > 2 ) + { + // store the sub-loop + quantities.push_back( loopLen ); + for ( int i = prevIndex; i < index; i++ ) + poly_nodes.push_back( simpleNodes[ i ]); } - nbSimple -= loopLen; - iSimple -= loopLen; + simpleNodes.resize( prevIndex+1 ); } - } // for (iSimple = 0; iSimple < nbSimple; iSimple++) - } // while (foundLoop) + else + { + simpleNodes.push_back( faceNodes[ iCur ]); + } + } + } - if (iSimple > 2) { - nbNew++; - quantities.push_back(iSimple); - for (int i = 0; i < iSimple; i++) - poly_nodes.push_back(simpleNodes[i]); + if ( simpleNodes.size() > 2 ) + { + quantities.push_back( simpleNodes.size() ); + poly_nodes.insert ( poly_nodes.end(), simpleNodes.begin(), simpleNodes.end() ); } - return nbNew; + return quantities.size() - prevNbQuant; } //======================================================================= @@ -7348,6 +7324,7 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) const SMDS_MeshElement* elem = *eIt; const int nbNodes = elem->NbNodes(); const int aShapeId = FindShape( elem ); + SMDSAbs_EntityType entity = elem->GetEntityType(); nodeSet.clear(); curNodes.resize( nbNodes ); @@ -7373,7 +7350,7 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) if ( nnIt_i != nodeNodeMap.end() ) { // n sticks n = (*nnIt_i).second; if (!nodesRecur.insert(n).second) { - // error: recursive dependancy + // error: recursive dependency stopRecur = true; } } @@ -7397,9 +7374,9 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) int nbUniqueNodes = nodeSet.size(); if ( nbNodes != nbUniqueNodes ) // some nodes stick { - if (elem->IsPoly()) // Polygons and Polyhedral volumes + if ( elem->IsPoly() ) // Polygons and Polyhedral volumes { - if (elem->GetType() == SMDSAbs_Face) // Polygon + if ( elem->GetType() == SMDSAbs_Face ) // Polygon { elemType.Init( elem ); const bool isQuad = elemType.myIsQuad; @@ -7434,7 +7411,7 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) } elemType.SetPoly(( nbNewNodes / ( elemType.myIsQuad + 1 ) > 4 )); - SMDS_MeshElement* newElem = AddElement( face_nodes, elemType ); + SMDS_MeshElement* newElem = AddElement( face_nodes, elemType.SetID(-1)); if ( aShapeId ) aMesh->SetMeshElementOnShape(newElem, aShapeId); } @@ -7443,53 +7420,53 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) } // Polygon - else if (elem->GetType() == SMDSAbs_Volume) // Polyhedral volume + else if ( elem->GetType() == SMDSAbs_Volume ) // Polyhedral volume { - if (nbUniqueNodes < 4) { + if ( nbUniqueNodes < 4 ) { rmElemIds.push_back(elem->GetID()); } else { // each face has to be analyzed in order to check volume validity const SMDS_VtkVolume* aPolyedre = dynamic_cast( elem ); - if (aPolyedre) + if ( aPolyedre ) { int nbFaces = aPolyedre->NbFaces(); vector poly_nodes; - vector quantities; + vector quantities; + vector faceNodes; - for (int iface = 1; iface <= nbFaces; iface++) { + for (int iface = 1; iface <= nbFaces; iface++) + { int nbFaceNodes = aPolyedre->NbFaceNodes(iface); - vector faceNodes (nbFaceNodes); - - for (int inode = 1; inode <= nbFaceNodes; inode++) { + faceNodes.resize( nbFaceNodes ); + for (int inode = 1; inode <= nbFaceNodes; inode++) + { const SMDS_MeshNode * faceNode = aPolyedre->GetFaceNode(iface, inode); TNodeNodeMap::iterator nnIt = nodeNodeMap.find(faceNode); - if (nnIt != nodeNodeMap.end()) { // faceNode sticks + if ( nnIt != nodeNodeMap.end() ) // faceNode sticks faceNode = (*nnIt).second; - } faceNodes[inode - 1] = faceNode; } - SimplifyFace(faceNodes, poly_nodes, quantities); } - if (quantities.size() > 3) { - // to be done: remove coincident faces + if ( quantities.size() > 3 ) { + // TODO: remove coincident faces } - if (quantities.size() > 3) + if ( quantities.size() > 3 ) { const SMDS_MeshElement* newElem = - aMesh->AddPolyhedralVolume(poly_nodes, quantities); - myLastCreatedElems.Append(newElem); + aMesh->AddPolyhedralVolume( poly_nodes, quantities ); + myLastCreatedElems.Append( newElem ); if ( aShapeId && newElem ) aMesh->SetMeshElementOnShape( newElem, aShapeId ); - rmElemIds.push_back(elem->GetID()); + rmElemIds.push_back( elem->GetID() ); } } else { - rmElemIds.push_back(elem->GetID()); + rmElemIds.push_back( elem->GetID() ); } } } @@ -7501,195 +7478,154 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) // Regular elements // TODO not all the possible cases are solved. Find something more generic? - switch ( nbNodes ) { - case 2: ///////////////////////////////////// EDGE - isOk = false; break; - case 3: ///////////////////////////////////// TRIANGLE - isOk = false; break; - case 4: - if ( elem->GetType() == SMDSAbs_Volume ) // TETRAHEDRON + switch ( entity ) { + case SMDSEntity_Edge: //////// EDGE + case SMDSEntity_Triangle: //// TRIANGLE + case SMDSEntity_Quad_Triangle: + case SMDSEntity_Tetra: + case SMDSEntity_Quad_Tetra: // TETRAHEDRON + { + isOk = false; + break; + } + case SMDSEntity_Quad_Edge: + { + isOk = false; // to linear EDGE ??????? + break; + } + case SMDSEntity_Quadrangle: //////////////////////////////////// QUADRANGLE + { + if ( nbUniqueNodes < 3 ) isOk = false; - else { //////////////////////////////////// QUADRANGLE - if ( nbUniqueNodes < 3 ) - isOk = false; - else if ( nbRepl == 2 && iRepl[ 1 ] - iRepl[ 0 ] == 2 ) - isOk = false; // opposite nodes stick - //MESSAGE("isOk " << isOk); + else if ( nbRepl == 1 && curNodes[ iRepl[0]] == curNodes[( iRepl[0]+2 )%4 ]) + isOk = false; // opposite nodes stick + break; + } + case SMDSEntity_Quad_Quadrangle: // Quadratic QUADRANGLE + { + // 1 5 2 + // +---+---+ + // | | + // 4+ +6 + // | | + // +---+---+ + // 0 7 3 + if (( nbUniqueNodes == 6 && nbRepl == 2 ) && + (( iRepl[0] == 1 && iRepl[1] == 4 && curNodes[1] == curNodes[0] ) || + ( iRepl[0] == 2 && iRepl[1] == 5 && curNodes[2] == curNodes[1] ) || + ( iRepl[0] == 3 && iRepl[1] == 6 && curNodes[3] == curNodes[2] ) || + ( iRepl[0] == 3 && iRepl[1] == 7 && curNodes[3] == curNodes[0] ))) + { + isOk = true; } break; - case 6: ///////////////////////////////////// PENTAHEDRON + } + case SMDSEntity_BiQuad_Quadrangle: // Bi-Quadratic QUADRANGLE + { + // 1 5 2 + // +---+---+ + // | | + // 4+ 8+ +6 + // | | + // +---+---+ + // 0 7 3 + if (( nbUniqueNodes == 7 && nbRepl == 2 && iRepl[1] != 8 ) && + (( iRepl[0] == 1 && iRepl[1] == 4 && curNodes[1] == curNodes[0] ) || + ( iRepl[0] == 2 && iRepl[1] == 5 && curNodes[2] == curNodes[1] ) || + ( iRepl[0] == 3 && iRepl[1] == 6 && curNodes[3] == curNodes[2] ) || + ( iRepl[0] == 3 && iRepl[1] == 7 && curNodes[3] == curNodes[0] ))) + { + isOk = true; + } + break; + } + case SMDSEntity_Penta: ///////////////////////////////////// PENTAHEDRON + { + isOk = false; if ( nbUniqueNodes == 4 ) { // ---------------------------------> tetrahedron - if (nbRepl == 3 && - iRepl[ 0 ] > 2 && iRepl[ 1 ] > 2 && iRepl[ 2 ] > 2 ) { - // all top nodes stick: reverse a bottom - uniqueNodes[ 0 ] = curNodes [ 1 ]; - uniqueNodes[ 1 ] = curNodes [ 0 ]; + if ( curNodes[3] == curNodes[4] && + curNodes[3] == curNodes[5] ) { + // top nodes stick + isOk = true; } - else if (nbRepl == 3 && - iRepl[ 0 ] < 3 && iRepl[ 1 ] < 3 && iRepl[ 2 ] < 3 ) { - // all bottom nodes stick: set a top before + else if ( curNodes[0] == curNodes[1] && + curNodes[0] == curNodes[2] ) { + // bottom nodes stick: set a top before uniqueNodes[ 3 ] = uniqueNodes [ 0 ]; - uniqueNodes[ 0 ] = curNodes [ 3 ]; + uniqueNodes[ 0 ] = curNodes [ 5 ]; uniqueNodes[ 1 ] = curNodes [ 4 ]; - uniqueNodes[ 2 ] = curNodes [ 5 ]; + uniqueNodes[ 2 ] = curNodes [ 3 ]; + isOk = true; } - else if (nbRepl == 4 && - iRepl[ 2 ] - iRepl [ 0 ] == 3 && iRepl[ 3 ] - iRepl [ 1 ] == 3 ) { - // a lateral face turns into a line: reverse a bottom - uniqueNodes[ 0 ] = curNodes [ 1 ]; - uniqueNodes[ 1 ] = curNodes [ 0 ]; + else if (( curNodes[0] == curNodes[3] ) + + ( curNodes[1] == curNodes[4] ) + + ( curNodes[2] == curNodes[5] ) == 2 ) { + // a lateral face turns into a line + isOk = true; } - else - isOk = false; } else if ( nbUniqueNodes == 5 ) { - // PENTAHEDRON --------------------> 2 tetrahedrons - if ( nbRepl == 2 && iRepl[ 1 ] - iRepl [ 0 ] == 3 ) { - // a bottom node sticks with a linked top one - // 1. - SMDS_MeshElement* newElem = - aMesh->AddVolume(curNodes[ 3 ], - curNodes[ 4 ], - curNodes[ 5 ], - curNodes[ iRepl[ 0 ] == 2 ? 1 : 2 ]); - myLastCreatedElems.Append(newElem); - if ( aShapeId ) - aMesh->SetMeshElementOnShape( newElem, aShapeId ); - // 2. : reverse a bottom - uniqueNodes[ 0 ] = curNodes [ 1 ]; - uniqueNodes[ 1 ] = curNodes [ 0 ]; - nbUniqueNodes = 4; - } - else - isOk = false; - } - else - isOk = false; - break; - case 8: { - if(elem->IsQuadratic()) { // Quadratic quadrangle - // 1 5 2 - // +---+---+ - // | | - // | | - // 4+ +6 - // | | - // | | - // +---+---+ - // 0 7 3 - isOk = false; - if(nbRepl==2) { - MESSAGE("nbRepl=2: " << iRepl[0] << " " << iRepl[1]); - } - if(nbRepl==3) { - MESSAGE("nbRepl=3: " << iRepl[0] << " " << iRepl[1] << " " << iRepl[2]); - nbUniqueNodes = 6; - if( iRepl[0]==0 && iRepl[1]==1 && iRepl[2]==4 ) { - uniqueNodes[0] = curNodes[0]; - uniqueNodes[1] = curNodes[2]; - uniqueNodes[2] = curNodes[3]; - uniqueNodes[3] = curNodes[5]; - uniqueNodes[4] = curNodes[6]; - uniqueNodes[5] = curNodes[7]; - isOk = true; - } - if( iRepl[0]==0 && iRepl[1]==3 && iRepl[2]==7 ) { - uniqueNodes[0] = curNodes[0]; - uniqueNodes[1] = curNodes[1]; - uniqueNodes[2] = curNodes[2]; - uniqueNodes[3] = curNodes[4]; - uniqueNodes[4] = curNodes[5]; - uniqueNodes[5] = curNodes[6]; - isOk = true; - } - if( iRepl[0]==0 && iRepl[1]==4 && iRepl[2]==7 ) { - uniqueNodes[0] = curNodes[1]; - uniqueNodes[1] = curNodes[2]; - uniqueNodes[2] = curNodes[3]; - uniqueNodes[3] = curNodes[5]; - uniqueNodes[4] = curNodes[6]; - uniqueNodes[5] = curNodes[0]; - isOk = true; - } - if( iRepl[0]==1 && iRepl[1]==2 && iRepl[2]==5 ) { - uniqueNodes[0] = curNodes[0]; - uniqueNodes[1] = curNodes[1]; - uniqueNodes[2] = curNodes[3]; - uniqueNodes[3] = curNodes[4]; - uniqueNodes[4] = curNodes[6]; - uniqueNodes[5] = curNodes[7]; - isOk = true; - } - if( iRepl[0]==1 && iRepl[1]==4 && iRepl[2]==5 ) { - uniqueNodes[0] = curNodes[0]; - uniqueNodes[1] = curNodes[2]; - uniqueNodes[2] = curNodes[3]; - uniqueNodes[3] = curNodes[1]; - uniqueNodes[4] = curNodes[6]; - uniqueNodes[5] = curNodes[7]; - isOk = true; - } - if( iRepl[0]==2 && iRepl[1]==3 && iRepl[2]==6 ) { - uniqueNodes[0] = curNodes[0]; - uniqueNodes[1] = curNodes[1]; - uniqueNodes[2] = curNodes[2]; - uniqueNodes[3] = curNodes[4]; - uniqueNodes[4] = curNodes[5]; - uniqueNodes[5] = curNodes[7]; - isOk = true; - } - if( iRepl[0]==2 && iRepl[1]==5 && iRepl[2]==6 ) { - uniqueNodes[0] = curNodes[0]; - uniqueNodes[1] = curNodes[1]; - uniqueNodes[2] = curNodes[3]; - uniqueNodes[3] = curNodes[4]; - uniqueNodes[4] = curNodes[2]; - uniqueNodes[5] = curNodes[7]; - isOk = true; - } - if( iRepl[0]==3 && iRepl[1]==6 && iRepl[2]==7 ) { - uniqueNodes[0] = curNodes[0]; - uniqueNodes[1] = curNodes[1]; - uniqueNodes[2] = curNodes[2]; - uniqueNodes[3] = curNodes[4]; - uniqueNodes[4] = curNodes[5]; - uniqueNodes[5] = curNodes[3]; - isOk = true; - } + // PENTAHEDRON --------------------> pyramid + if ( curNodes[0] == curNodes[3] ) + { + uniqueNodes[ 0 ] = curNodes[ 1 ]; + uniqueNodes[ 1 ] = curNodes[ 4 ]; + uniqueNodes[ 2 ] = curNodes[ 5 ]; + uniqueNodes[ 3 ] = curNodes[ 2 ]; + uniqueNodes[ 4 ] = curNodes[ 0 ]; + isOk = true; } - if(nbRepl==4) { - MESSAGE("nbRepl=4: " << iRepl[0] << " " << iRepl[1] << " " << iRepl[2] << " " << iRepl[3]); + if ( curNodes[1] == curNodes[4] ) + { + uniqueNodes[ 0 ] = curNodes[ 0 ]; + uniqueNodes[ 1 ] = curNodes[ 2 ]; + uniqueNodes[ 2 ] = curNodes[ 5 ]; + uniqueNodes[ 3 ] = curNodes[ 3 ]; + uniqueNodes[ 4 ] = curNodes[ 1 ]; + isOk = true; } - if(nbRepl==5) { - MESSAGE("nbRepl=5: " << iRepl[0] << " " << iRepl[1] << " " << iRepl[2] << " " << iRepl[3] << " " << iRepl[4]); + if ( curNodes[2] == curNodes[5] ) + { + uniqueNodes[ 0 ] = curNodes[ 0 ]; + uniqueNodes[ 1 ] = curNodes[ 3 ]; + uniqueNodes[ 2 ] = curNodes[ 4 ]; + uniqueNodes[ 3 ] = curNodes[ 1 ]; + uniqueNodes[ 4 ] = curNodes[ 2 ]; + isOk = true; } - break; } + break; + } + case SMDSEntity_Hexa: + { //////////////////////////////////// HEXAHEDRON isOk = false; SMDS_VolumeTool hexa (elem); hexa.SetExternalNormal(); if ( nbUniqueNodes == 4 && nbRepl == 4 ) { - //////////////////////// HEX ---> 1 tetrahedron + //////////////////////// HEX ---> tetrahedron for ( int iFace = 0; iFace < 6; iFace++ ) { const int *ind = hexa.GetFaceNodesIndices( iFace ); // indices of face nodes if (curNodes[ind[ 0 ]] == curNodes[ind[ 1 ]] && curNodes[ind[ 0 ]] == curNodes[ind[ 2 ]] && curNodes[ind[ 0 ]] == curNodes[ind[ 3 ]] ) { // one face turns into a point ... + int pickInd = ind[ 0 ]; int iOppFace = hexa.GetOppFaceIndex( iFace ); ind = hexa.GetFaceNodesIndices( iOppFace ); int nbStick = 0; + uniqueNodes.clear(); for ( iCur = 0; iCur < 4 && nbStick < 2; iCur++ ) { if ( curNodes[ind[ iCur ]] == curNodes[ind[ iCur + 1 ]] ) nbStick++; + else + uniqueNodes.push_back( curNodes[ind[ iCur ]]); } if ( nbStick == 1 ) { // ... and the opposite one - into a triangle. // set a top node - ind = hexa.GetFaceNodesIndices( iFace ); - uniqueNodes[ 3 ] = curNodes[ind[ 0 ]]; + uniqueNodes.push_back( curNodes[ pickInd ]); isOk = true; } break; @@ -7697,7 +7633,7 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) } } else if ( nbUniqueNodes == 6 && nbRepl == 2 ) { - //////////////////////// HEX ---> 1 prism + //////////////////////// HEX ---> prism int nbTria = 0, iTria[3]; const int *ind; // indices of face nodes // look for triangular faces @@ -7712,7 +7648,6 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) // check if triangles are opposite if ( nbTria == 2 && iTria[0] == hexa.GetOppFaceIndex( iTria[1] )) { - isOk = true; // set nodes of the bottom triangle ind = hexa.GetFaceNodesIndices( iTria[ 0 ]); vector indB; @@ -7732,11 +7667,12 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) uniqueNodes[ iCur + 3 ] = curNodes[ indT[ j ]]; break; } + isOk = true; + break; } - break; } - else if (nbUniqueNodes == 5 && nbRepl == 4 ) { - //////////////////// HEXAHEDRON ---> 2 tetrahedrons + else if (nbUniqueNodes == 5 && nbRepl == 3 ) { + //////////////////// HEXAHEDRON ---> pyramid for ( int iFace = 0; iFace < 6; iFace++ ) { const int *ind = hexa.GetFaceNodesIndices( iFace ); // indices of face nodes if (curNodes[ind[ 0 ]] == curNodes[ind[ 1 ]] && @@ -7745,139 +7681,61 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) // one face turns into a point ... int iOppFace = hexa.GetOppFaceIndex( iFace ); ind = hexa.GetFaceNodesIndices( iOppFace ); - int nbStick = 0; - iUnique = 2; // reverse a tetrahedron 1 bottom - for ( iCur = 0; iCur < 4 && nbStick == 0; iCur++ ) { + uniqueNodes.clear(); + for ( iCur = 0; iCur < 4; iCur++ ) { if ( curNodes[ind[ iCur ]] == curNodes[ind[ iCur + 1 ]] ) - nbStick++; - else if ( iUnique >= 0 ) - uniqueNodes[ iUnique-- ] = curNodes[ind[ iCur ]]; + break; + else + uniqueNodes.push_back( curNodes[ind[ iCur ]]); } - if ( nbStick == 0 ) { + if ( uniqueNodes.size() == 4 ) { // ... and the opposite one is a quadrangle // set a top node const int* indTop = hexa.GetFaceNodesIndices( iFace ); - uniqueNodes[ 3 ] = curNodes[indTop[ 0 ]]; - nbUniqueNodes = 4; - // tetrahedron 2 - SMDS_MeshElement* newElem = - aMesh->AddVolume(curNodes[ind[ 0 ]], - curNodes[ind[ 3 ]], - curNodes[ind[ 2 ]], - curNodes[indTop[ 0 ]]); - myLastCreatedElems.Append(newElem); - if ( aShapeId ) - aMesh->SetMeshElementOnShape( newElem, aShapeId ); + uniqueNodes.push_back( curNodes[indTop[ 0 ]]); isOk = true; } break; } } } - else if ( nbUniqueNodes == 6 && nbRepl == 4 ) { - ////////////////// HEXAHEDRON ---> 2 tetrahedrons or 1 prism - // find indices of quad and tri faces - int iQuadFace[ 6 ], iTriFace[ 6 ], nbQuad = 0, nbTri = 0, iFace; - for ( iFace = 0; iFace < 6; iFace++ ) { + + if ( !isOk && nbUniqueNodes > 4 ) { + ////////////////// HEXAHEDRON ---> polyhedron + hexa.SetExternalNormal(); + vector poly_nodes; poly_nodes.reserve( 6 * 4 ); + vector quantities; quantities.reserve( 6 ); + for ( int iFace = 0; iFace < 6; iFace++ ) + { const int *ind = hexa.GetFaceNodesIndices( iFace ); // indices of face nodes + if ( curNodes[ind[0]] == curNodes[ind[2]] || + curNodes[ind[1]] == curNodes[ind[3]] ) + { + quantities.clear(); + break; // opposite nodes stick + } nodeSet.clear(); for ( iCur = 0; iCur < 4; iCur++ ) - nodeSet.insert( curNodes[ind[ iCur ]] ); - nbUniqueNodes = nodeSet.size(); - if ( nbUniqueNodes == 3 ) - iTriFace[ nbTri++ ] = iFace; - else if ( nbUniqueNodes == 4 ) - iQuadFace[ nbQuad++ ] = iFace; - } - if (nbQuad == 2 && nbTri == 4 && - hexa.GetOppFaceIndex( iQuadFace[ 0 ] ) == iQuadFace[ 1 ]) { - // 2 opposite quadrangles stuck with a diagonal; - // sample groups of merged indices: (0-4)(2-6) - // --------------------------------------------> 2 tetrahedrons - const int *ind1 = hexa.GetFaceNodesIndices( iQuadFace[ 0 ]); // indices of quad1 nodes - const int *ind2 = hexa.GetFaceNodesIndices( iQuadFace[ 1 ]); - int i0, i1d, i2, i3d, i0t, i2t; // d-daigonal, t-top - if (curNodes[ind1[ 0 ]] == curNodes[ind2[ 0 ]] && - curNodes[ind1[ 2 ]] == curNodes[ind2[ 2 ]]) { - // stuck with 0-2 diagonal - i0 = ind1[ 3 ]; - i1d = ind1[ 0 ]; - i2 = ind1[ 1 ]; - i3d = ind1[ 2 ]; - i0t = ind2[ 1 ]; - i2t = ind2[ 3 ]; - } - else if (curNodes[ind1[ 1 ]] == curNodes[ind2[ 3 ]] && - curNodes[ind1[ 3 ]] == curNodes[ind2[ 1 ]]) { - // stuck with 1-3 diagonal - i0 = ind1[ 0 ]; - i1d = ind1[ 1 ]; - i2 = ind1[ 2 ]; - i3d = ind1[ 3 ]; - i0t = ind2[ 0 ]; - i2t = ind2[ 1 ]; - } - else { - ASSERT(0); + { + if ( nodeSet.insert( curNodes[ind[ iCur ]] ).second ) + poly_nodes.push_back( curNodes[ind[ iCur ]]); } - // tetrahedron 1 - uniqueNodes[ 0 ] = curNodes [ i0 ]; - uniqueNodes[ 1 ] = curNodes [ i1d ]; - uniqueNodes[ 2 ] = curNodes [ i3d ]; - uniqueNodes[ 3 ] = curNodes [ i0t ]; - nbUniqueNodes = 4; - // tetrahedron 2 - SMDS_MeshElement* newElem = aMesh->AddVolume(curNodes[ i1d ], - curNodes[ i2 ], - curNodes[ i3d ], - curNodes[ i2t ]); - myLastCreatedElems.Append(newElem); - if ( aShapeId ) - aMesh->SetMeshElementOnShape( newElem, aShapeId ); - isOk = true; + if ( nodeSet.size() < 3 ) + poly_nodes.resize( poly_nodes.size() - nodeSet.size() ); + else + quantities.push_back( nodeSet.size() ); } - else if (( nbTri == 2 && nbQuad == 3 ) || // merged (0-4)(1-5) - ( nbTri == 4 && nbQuad == 2 )) { // merged (7-4)(1-5) - // --------------------------------------------> prism - // find 2 opposite triangles - nbUniqueNodes = 6; - for ( iFace = 0; iFace + 1 < nbTri; iFace++ ) { - if ( hexa.GetOppFaceIndex( iTriFace[ iFace ] ) == iTriFace[ iFace + 1 ]) { - // find indices of kept and replaced nodes - // and fill unique nodes of 2 opposite triangles - const int *ind1 = hexa.GetFaceNodesIndices( iTriFace[ iFace ]); - const int *ind2 = hexa.GetFaceNodesIndices( iTriFace[ iFace + 1 ]); - const SMDS_MeshNode** hexanodes = hexa.GetNodes(); - // fill unique nodes - iUnique = 0; - isOk = true; - for ( iCur = 0; iCur < 4 && isOk; iCur++ ) { - const SMDS_MeshNode* n = curNodes[ind1[ iCur ]]; - const SMDS_MeshNode* nInit = hexanodes[ind1[ iCur ]]; - if ( n == nInit ) { - // iCur of a linked node of the opposite face (make normals co-directed): - int iCurOpp = ( iCur == 1 || iCur == 3 ) ? 4 - iCur : iCur; - // check that correspondent corners of triangles are linked - if ( !hexa.IsLinked( ind1[ iCur ], ind2[ iCurOpp ] )) - isOk = false; - else { - uniqueNodes[ iUnique ] = n; - uniqueNodes[ iUnique + 3 ] = curNodes[ind2[ iCurOpp ]]; - iUnique++; - } - } - } - break; - } - } + if ( quantities.size() >= 4 ) + { + const SMDS_MeshElement* newElem = aMesh->AddPolyhedralVolume( poly_nodes, quantities ); + myLastCreatedElems.Append( newElem ); + if ( aShapeId && newElem ) + aMesh->SetMeshElementOnShape( newElem, aShapeId ); + rmElemIds.push_back( elem->GetID() ); } - } // if ( nbUniqueNodes == 6 && nbRepl == 4 ) - else - { - MESSAGE("MergeNodes() removes hexahedron "<< elem); } break; - } // HEXAHEDRON + } // case HEXAHEDRON default: isOk = false; @@ -7885,7 +7743,7 @@ void SMESH_MeshEditor::MergeNodes (TListOfListOfNodes & theGroupsOfNodes) } // if ( nbNodes != nbUniqueNodes ) // some nodes stick - if ( isOk ) // the non-poly elem remains valid after sticking nodes + if ( isOk ) // a non-poly elem remains valid after sticking nodes { if ( nbNodes != nbUniqueNodes || !aMesh->ChangeElementNodes( elem, & curNodes[0], nbNodes )) -- 2.39.2