Py::Tuple FemMeshPy::getFaces(void) const
{
std::set<int> ids;
SMDS_FaceIteratorPtr aFaceIter = getFemMeshPtr()->getSMesh()->GetMeshDS()->facesIterator();
while (aFaceIter->more()) {
const SMDS_MeshFace* aFace = aFaceIter->next();
ids.insert(aFace->GetID());
}
Py::Tuple tuple(ids.size());
int index = 0;
for (std::set<int>::iterator it = ids.begin(); it != ids.end(); ++it) {
tuple.setItem(index++, Py::Long(*it));
}
return tuple;
}
bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
SMESH_MesherHelper* aHelper)
{
MESSAGE("NETGENPlugin_NETGEN_3D::Compute with maxElmentsize = " << _maxElementVolume);
const int invalid_ID = -1;
bool _quadraticMesh = false;
typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
TNodeToIDMap nodeToNetgenID;
list< const SMDS_MeshElement* > triangles;
SMESHDS_Mesh* MeshDS = aHelper->GetMeshDS();
SMESH_MesherHelper::MType MeshType = aHelper->IsQuadraticMesh();
if(MeshType == SMESH_MesherHelper::COMP)
return error( COMPERR_BAD_INPUT_MESH,
SMESH_Comment("Mesh with linear and quadratic elements given."));
else if (MeshType == SMESH_MesherHelper::QUADRATIC)
_quadraticMesh = true;
StdMeshers_QuadToTriaAdaptor Adaptor;
Adaptor.Compute(aMesh);
SMDS_FaceIteratorPtr fIt = MeshDS->facesIterator();
TIDSortedElemSet sortedFaces; // 0020279: control the "random" use when using mesh algorithms
while( fIt->more()) sortedFaces.insert( fIt->next() );
TIDSortedElemSet::iterator itFace = sortedFaces.begin(), fEnd = sortedFaces.end();
for ( ; itFace != fEnd; ++itFace ) {
// check element
const SMDS_MeshElement* elem = *itFace;
if ( !elem )
return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
bool isTraingle = ( elem->NbNodes()==3 || (_quadraticMesh && elem->NbNodes()==6 ));
if ( !isTraingle ) {
//return error( COMPERR_BAD_INPUT_MESH,
// SMESH_Comment("Not triangle element ")<<elem->GetID());
// using adaptor
const list<const SMDS_FaceOfNodes*>* faces = Adaptor.GetTriangles(elem);
if(faces==0) {
return error( COMPERR_BAD_INPUT_MESH,
SMESH_Comment("Not triangles in adaptor for element ")<<elem->GetID());
}
list<const SMDS_FaceOfNodes*>::const_iterator itf = faces->begin();
for(; itf!=faces->end(); itf++ ) {
triangles.push_back( (*itf) );
// put triange's nodes to nodeToNetgenID map
SMDS_ElemIteratorPtr triangleNodesIt = (*itf)->nodesIterator();
while ( triangleNodesIt->more() ) {
const SMDS_MeshNode * node =
static_cast<const SMDS_MeshNode *>(triangleNodesIt->next());
if(aHelper->IsMedium(node))
continue;
nodeToNetgenID.insert( make_pair( node, invalid_ID ));
}
}
}
else {
// keep a triangle
triangles.push_back( elem );
// put elem nodes to nodeToNetgenID map
SMDS_ElemIteratorPtr triangleNodesIt = elem->nodesIterator();
while ( triangleNodesIt->more() ) {
const SMDS_MeshNode * node =
static_cast<const SMDS_MeshNode *>(triangleNodesIt->next());
if(aHelper->IsMedium(node))
continue;
nodeToNetgenID.insert( make_pair( node, invalid_ID ));
}
}
}
// ---------------------------------
// Feed the Netgen with surface mesh
// ---------------------------------
int Netgen_NbOfNodes = 0;
int Netgen_param2ndOrder = 0;
double Netgen_paramFine = 1.;
double Netgen_paramSize = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
double Netgen_point[3];
int Netgen_triangle[3];
int Netgen_tetrahedron[4];
Ng_Init();
Ng_Mesh * Netgen_mesh = Ng_NewMesh();
// set nodes and remember thier netgen IDs
TNodeToIDMap::iterator n_id = nodeToNetgenID.begin();
for ( ; n_id != nodeToNetgenID.end(); ++n_id )
{
const SMDS_MeshNode* node = n_id->first;
Netgen_point [ 0 ] = node->X();
Netgen_point [ 1 ] = node->Y();
Netgen_point [ 2 ] = node->Z();
Ng_AddPoint(Netgen_mesh, Netgen_point);
n_id->second = ++Netgen_NbOfNodes; // set netgen ID
}
// set triangles
list< const SMDS_MeshElement* >::iterator tria = triangles.begin();
for ( ; tria != triangles.end(); ++tria)
{
int i = 0;
SMDS_ElemIteratorPtr triangleNodesIt = (*tria)->nodesIterator();
while ( triangleNodesIt->more() ) {
const SMDS_MeshNode * node =
static_cast<const SMDS_MeshNode *>(triangleNodesIt->next());
if(aHelper->IsMedium(node))
continue;
Netgen_triangle[ i ] = nodeToNetgenID[ node ];
++i;
}
Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
}
// -------------------------
// Generate the volume mesh
// -------------------------
Ng_Meshing_Parameters Netgen_param;
Netgen_param.secondorder = Netgen_param2ndOrder;
Netgen_param.fineness = Netgen_paramFine;
Netgen_param.maxh = Netgen_paramSize;
Ng_Result status;
try {
#if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
OCC_CATCH_SIGNALS;
#endif
status = Ng_GenerateVolumeMesh(Netgen_mesh, &Netgen_param);
}
catch (Standard_Failure& exc) {
error(COMPERR_OCC_EXCEPTION, exc.GetMessageString());
status = NG_VOLUME_FAILURE;
}
catch (...) {
error("Bad mesh input!!!");
status = NG_VOLUME_FAILURE;
}
if ( GetComputeError()->IsOK() ) {
error( status, "Bad mesh input!!!");
}
int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
int Netgen_NbOfTetra = Ng_GetNE(Netgen_mesh);
MESSAGE("End of Volume Mesh Generation. status=" << status <<
", nb new nodes: " << Netgen_NbOfNodesNew - Netgen_NbOfNodes <<
", nb tetra: " << Netgen_NbOfTetra);
// -------------------------------------------------------------------
// Feed back the SMESHDS with the generated Nodes and Volume Elements
// -------------------------------------------------------------------
bool isOK = ( Netgen_NbOfTetra > 0 );// get whatever built
if ( isOK )
{
// vector of nodes in which node index == netgen ID
vector< const SMDS_MeshNode* > nodeVec ( Netgen_NbOfNodesNew + 1 );
// insert old nodes into nodeVec
for ( n_id = nodeToNetgenID.begin(); n_id != nodeToNetgenID.end(); ++n_id ) {
nodeVec.at( n_id->second ) = n_id->first;
}
// create and insert new nodes into nodeVec
int nodeIndex = Netgen_NbOfNodes + 1;
for ( ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
{
Ng_GetPoint( Netgen_mesh, nodeIndex, Netgen_point );
SMDS_MeshNode * node = aHelper->AddNode(Netgen_point[0],
Netgen_point[1],
Netgen_point[2]);
nodeVec.at(nodeIndex) = node;
}
// create tetrahedrons
for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
{
Ng_GetVolumeElement(Netgen_mesh, elemIndex, Netgen_tetrahedron);
aHelper->AddVolume (nodeVec.at( Netgen_tetrahedron[0] ),
nodeVec.at( Netgen_tetrahedron[1] ),
nodeVec.at( Netgen_tetrahedron[2] ),
nodeVec.at( Netgen_tetrahedron[3] ));
}
}
Ng_DeleteMesh(Netgen_mesh);
Ng_Exit();
NETGENPlugin_Mesher::RemoveTmpFiles();
return (status == NG_OK);
}
Mesh::MeshObject* Mesher::createMesh() const
{
// OCC standard mesher
if (method == Standard) {
Handle_StlMesh_Mesh aMesh = new StlMesh_Mesh();
if (!shape.IsNull()) {
BRepTools::Clean(shape);
#if OCC_VERSION_HEX >= 0x060801
BRepMesh_IncrementalMesh bMesh(shape, deflection, Standard_False, angularDeflection);
StlTransfer::RetrieveMesh(shape,aMesh);
#else
StlTransfer::BuildIncrementalMesh(shape, deflection,
#if OCC_VERSION_HEX >= 0x060503
Standard_True,
#endif
aMesh);
#endif
}
std::map<uint32_t, std::vector<std::size_t> > colorMap;
for (std::size_t i=0; i<colors.size(); i++) {
colorMap[colors[i]].push_back(i);
}
bool createSegm = (static_cast<int>(colors.size()) == aMesh->NbDomains());
MeshCore::MeshFacetArray faces;
faces.reserve(aMesh->NbTriangles());
std::set<Vertex> vertices;
Standard_Real x1, y1, z1;
Standard_Real x2, y2, z2;
Standard_Real x3, y3, z3;
std::vector< std::vector<unsigned long> > meshSegments;
std::size_t numMeshFaces = 0;
StlMesh_MeshExplorer xp(aMesh);
for (Standard_Integer nbd=1;nbd<=aMesh->NbDomains();nbd++) {
std::size_t numDomainFaces = 0;
for (xp.InitTriangle(nbd); xp.MoreTriangle(); xp.NextTriangle()) {
xp.TriangleVertices(x1,y1,z1,x2,y2,z2,x3,y3,z3);
std::set<Vertex>::iterator it;
MeshCore::MeshFacet face;
// 1st vertex
Vertex v1(x1,y1,z1);
it = vertices.find(v1);
if (it == vertices.end()) {
v1.i = vertices.size();
face._aulPoints[0] = v1.i;
vertices.insert(v1);
}
else {
face._aulPoints[0] = it->i;
}
// 2nd vertex
Vertex v2(x2,y2,z2);
it = vertices.find(v2);
if (it == vertices.end()) {
v2.i = vertices.size();
face._aulPoints[1] = v2.i;
vertices.insert(v2);
}
else {
face._aulPoints[1] = it->i;
}
// 3rd vertex
Vertex v3(x3,y3,z3);
it = vertices.find(v3);
if (it == vertices.end()) {
v3.i = vertices.size();
face._aulPoints[2] = v3.i;
vertices.insert(v3);
}
else {
face._aulPoints[2] = it->i;
}
// make sure that we don't insert invalid facets
if (face._aulPoints[0] != face._aulPoints[1] &&
face._aulPoints[1] != face._aulPoints[2] &&
face._aulPoints[2] != face._aulPoints[0]) {
faces.push_back(face);
numDomainFaces++;
}
}
// add a segment for the face
if (createSegm || this->segments) {
std::vector<unsigned long> segment(numDomainFaces);
std::generate(segment.begin(), segment.end(), Base::iotaGen<unsigned long>(numMeshFaces));
numMeshFaces += numDomainFaces;
meshSegments.push_back(segment);
}
}
MeshCore::MeshPointArray verts;
verts.resize(vertices.size());
for (auto it : vertices)
verts[it.i] = it.toPoint();
MeshCore::MeshKernel kernel;
kernel.Adopt(verts, faces, true);
Mesh::MeshObject* meshdata = new Mesh::MeshObject();
meshdata->swap(kernel);
if (createSegm) {
int index = 0;
for (auto it : colorMap) {
Mesh::Segment segm(meshdata, false);
for (auto jt : it.second) {
segm.addIndices(meshSegments[jt]);
}
segm.save(true);
std::stringstream str;
str << "patch" << index++;
segm.setName(str.str());
meshdata->addSegment(segm);
}
}
else {
for (auto it : meshSegments) {
meshdata->addSegment(it);
}
}
return meshdata;
}
#ifndef HAVE_SMESH
throw Base::Exception("SMESH is not available on this platform");
#else
std::list<SMESH_Hypothesis*> hypoth;
SMESH_Gen* meshgen = SMESH_Gen::get();
SMESH_Mesh* mesh = meshgen->CreateMesh(0, true);
int hyp=0;
switch (method) {
#if defined (HAVE_NETGEN)
case Netgen: {
NETGENPlugin_Hypothesis_2D* hyp2d = new NETGENPlugin_Hypothesis_2D(hyp++,0,meshgen);
if (fineness >=0 && fineness < 5) {
hyp2d->SetFineness(NETGENPlugin_Hypothesis_2D::Fineness(fineness));
}
// user defined values
else {
if (growthRate > 0)
hyp2d->SetGrowthRate(growthRate);
if (nbSegPerEdge > 0)
hyp2d->SetNbSegPerEdge(nbSegPerEdge);
if (nbSegPerRadius > 0)
hyp2d->SetNbSegPerRadius(nbSegPerRadius);
}
hyp2d->SetQuadAllowed(allowquad);
hyp2d->SetOptimize(optimize);
hyp2d->SetSecondOrder(secondOrder); // apply bisecting to create four triangles out of one
hypoth.push_back(hyp2d);
NETGENPlugin_NETGEN_2D* alg2d = new NETGENPlugin_NETGEN_2D(hyp++,0,meshgen);
hypoth.push_back(alg2d);
} break;
#endif
#if defined (HAVE_MEFISTO)
case Mefisto: {
if (maxLength > 0) {
StdMeshers_MaxLength* hyp1d = new StdMeshers_MaxLength(hyp++, 0, meshgen);
hyp1d->SetLength(maxLength);
hypoth.push_back(hyp1d);
}
else if (localLength > 0) {
StdMeshers_LocalLength* hyp1d = new StdMeshers_LocalLength(hyp++,0,meshgen);
hyp1d->SetLength(localLength);
hypoth.push_back(hyp1d);
}
else if (maxArea > 0) {
StdMeshers_MaxElementArea* hyp2d = new StdMeshers_MaxElementArea(hyp++,0,meshgen);
hyp2d->SetMaxArea(maxArea);
hypoth.push_back(hyp2d);
}
else if (deflection > 0) {
StdMeshers_Deflection1D* hyp1d = new StdMeshers_Deflection1D(hyp++,0,meshgen);
hyp1d->SetDeflection(deflection);
hypoth.push_back(hyp1d);
}
else if (minLen > 0 && maxLen > 0) {
StdMeshers_Arithmetic1D* hyp1d = new StdMeshers_Arithmetic1D(hyp++,0,meshgen);
hyp1d->SetLength(minLen, false);
hyp1d->SetLength(maxLen, true);
hypoth.push_back(hyp1d);
}
else {
StdMeshers_AutomaticLength* hyp1d = new StdMeshers_AutomaticLength(hyp++,0,meshgen);
hypoth.push_back(hyp1d);
}
{
StdMeshers_NumberOfSegments* hyp1d = new StdMeshers_NumberOfSegments(hyp++,0,meshgen);
hyp1d->SetNumberOfSegments(1);
hypoth.push_back(hyp1d);
}
if (regular) {
StdMeshers_Regular_1D* hyp1d = new StdMeshers_Regular_1D(hyp++,0,meshgen);
hypoth.push_back(hyp1d);
}
StdMeshers_TrianglePreference* hyp2d_1 = new StdMeshers_TrianglePreference(hyp++,0,meshgen);
hypoth.push_back(hyp2d_1);
StdMeshers_MEFISTO_2D* alg2d = new StdMeshers_MEFISTO_2D(hyp++,0,meshgen);
hypoth.push_back(alg2d);
} break;
#endif
default:
break;
}
// Set new cout
MeshingOutput stdcout;
std::streambuf* oldcout = std::cout.rdbuf(&stdcout);
// Apply the hypothesis and create the mesh
mesh->ShapeToMesh(shape);
for (int i=0; i<hyp;i++)
mesh->AddHypothesis(shape, i);
meshgen->Compute(*mesh, mesh->GetShapeToMesh());
// Restore old cout
std::cout.rdbuf(oldcout);
// build up the mesh structure
SMDS_FaceIteratorPtr aFaceIter = mesh->GetMeshDS()->facesIterator();
SMDS_NodeIteratorPtr aNodeIter = mesh->GetMeshDS()->nodesIterator();
MeshCore::MeshPointArray verts;
MeshCore::MeshFacetArray faces;
verts.reserve(mesh->NbNodes());
faces.reserve(mesh->NbFaces());
int index=0;
std::map<const SMDS_MeshNode*, int> mapNodeIndex;
for (;aNodeIter->more();) {
const SMDS_MeshNode* aNode = aNodeIter->next();
MeshCore::MeshPoint p;
p.Set((float)aNode->X(), (float)aNode->Y(), (float)aNode->Z());
verts.push_back(p);
mapNodeIndex[aNode] = index++;
}
for (;aFaceIter->more();) {
const SMDS_MeshFace* aFace = aFaceIter->next();
if (aFace->NbNodes() == 3) {
MeshCore::MeshFacet f;
for (int i=0; i<3;i++) {
const SMDS_MeshNode* node = aFace->GetNode(i);
f._aulPoints[i] = mapNodeIndex[node];
}
faces.push_back(f);
}
else if (aFace->NbNodes() == 4) {
MeshCore::MeshFacet f1, f2;
const SMDS_MeshNode* node0 = aFace->GetNode(0);
const SMDS_MeshNode* node1 = aFace->GetNode(1);
const SMDS_MeshNode* node2 = aFace->GetNode(2);
const SMDS_MeshNode* node3 = aFace->GetNode(3);
f1._aulPoints[0] = mapNodeIndex[node0];
f1._aulPoints[1] = mapNodeIndex[node1];
f1._aulPoints[2] = mapNodeIndex[node2];
f2._aulPoints[0] = mapNodeIndex[node0];
f2._aulPoints[1] = mapNodeIndex[node2];
f2._aulPoints[2] = mapNodeIndex[node3];
faces.push_back(f1);
faces.push_back(f2);
}
else if (aFace->NbNodes() == 6) {
MeshCore::MeshFacet f1, f2, f3, f4;
const SMDS_MeshNode* node0 = aFace->GetNode(0);
const SMDS_MeshNode* node1 = aFace->GetNode(1);
const SMDS_MeshNode* node2 = aFace->GetNode(2);
const SMDS_MeshNode* node3 = aFace->GetNode(3);
const SMDS_MeshNode* node4 = aFace->GetNode(4);
const SMDS_MeshNode* node5 = aFace->GetNode(5);
f1._aulPoints[0] = mapNodeIndex[node0];
f1._aulPoints[1] = mapNodeIndex[node3];
f1._aulPoints[2] = mapNodeIndex[node5];
f2._aulPoints[0] = mapNodeIndex[node1];
f2._aulPoints[1] = mapNodeIndex[node4];
f2._aulPoints[2] = mapNodeIndex[node3];
f3._aulPoints[0] = mapNodeIndex[node2];
f3._aulPoints[1] = mapNodeIndex[node5];
f3._aulPoints[2] = mapNodeIndex[node4];
f4._aulPoints[0] = mapNodeIndex[node3];
f4._aulPoints[1] = mapNodeIndex[node4];
f4._aulPoints[2] = mapNodeIndex[node5];
faces.push_back(f1);
faces.push_back(f2);
faces.push_back(f3);
faces.push_back(f4);
}
else if (aFace->NbNodes() == 8) {
MeshCore::MeshFacet f1, f2, f3, f4, f5, f6;
const SMDS_MeshNode* node0 = aFace->GetNode(0);
const SMDS_MeshNode* node1 = aFace->GetNode(1);
const SMDS_MeshNode* node2 = aFace->GetNode(2);
const SMDS_MeshNode* node3 = aFace->GetNode(3);
const SMDS_MeshNode* node4 = aFace->GetNode(4);
const SMDS_MeshNode* node5 = aFace->GetNode(5);
const SMDS_MeshNode* node6 = aFace->GetNode(6);
const SMDS_MeshNode* node7 = aFace->GetNode(7);
f1._aulPoints[0] = mapNodeIndex[node0];
f1._aulPoints[1] = mapNodeIndex[node4];
f1._aulPoints[2] = mapNodeIndex[node7];
f2._aulPoints[0] = mapNodeIndex[node1];
f2._aulPoints[1] = mapNodeIndex[node5];
f2._aulPoints[2] = mapNodeIndex[node4];
f3._aulPoints[0] = mapNodeIndex[node2];
f3._aulPoints[1] = mapNodeIndex[node6];
f3._aulPoints[2] = mapNodeIndex[node5];
f4._aulPoints[0] = mapNodeIndex[node3];
f4._aulPoints[1] = mapNodeIndex[node7];
f4._aulPoints[2] = mapNodeIndex[node6];
// Two solutions are possible:
// <4,6,7>, <4,5,6> or <4,5,7>, <5,6,7>
Base::Vector3d v4(node4->X(),node4->Y(),node4->Z());
Base::Vector3d v5(node5->X(),node5->Y(),node5->Z());
Base::Vector3d v6(node6->X(),node6->Y(),node6->Z());
Base::Vector3d v7(node7->X(),node7->Y(),node7->Z());
double dist46 = Base::DistanceP2(v4,v6);
double dist57 = Base::DistanceP2(v5,v7);
if (dist46 > dist57) {
f5._aulPoints[0] = mapNodeIndex[node4];
f5._aulPoints[1] = mapNodeIndex[node6];
f5._aulPoints[2] = mapNodeIndex[node7];
f6._aulPoints[0] = mapNodeIndex[node4];
f6._aulPoints[1] = mapNodeIndex[node5];
f6._aulPoints[2] = mapNodeIndex[node6];
}
else {
f5._aulPoints[0] = mapNodeIndex[node4];
f5._aulPoints[1] = mapNodeIndex[node5];
f5._aulPoints[2] = mapNodeIndex[node7];
f6._aulPoints[0] = mapNodeIndex[node5];
f6._aulPoints[1] = mapNodeIndex[node6];
f6._aulPoints[2] = mapNodeIndex[node7];
}
faces.push_back(f1);
faces.push_back(f2);
faces.push_back(f3);
faces.push_back(f4);
faces.push_back(f5);
faces.push_back(f6);
}
else {
Base::Console().Warning("Face with %d nodes ignored\n", aFace->NbNodes());
}
}
// clean up
TopoDS_Shape aNull;
mesh->ShapeToMesh(aNull);
mesh->Clear();
delete mesh;
for (std::list<SMESH_Hypothesis*>::iterator it = hypoth.begin(); it != hypoth.end(); ++it)
delete *it;
MeshCore::MeshKernel kernel;
kernel.Adopt(verts, faces, true);
Mesh::MeshObject* meshdata = new Mesh::MeshObject();
meshdata->swap(kernel);
return meshdata;
#endif // HAVE_SMESH
}
void ViewProviderFEMMeshBuilder::createMesh(const App::Property* prop, SoCoordinate3* coords, SoIndexedFaceSet* faces) const
{
const Fem::PropertyFemMesh* mesh = static_cast<const Fem::PropertyFemMesh*>(prop);
SMESHDS_Mesh* data = const_cast<SMESH_Mesh*>(mesh->getValue().getSMesh())->GetMeshDS();
const SMDS_MeshInfo& info = data->GetMeshInfo();
int numNode = info.NbNodes();
int numTria = info.NbTriangles();
int numQuad = info.NbQuadrangles();
//int numPoly = info.NbPolygons();
//int numVolu = info.NbVolumes();
int numTetr = info.NbTetras();
//int numHexa = info.NbHexas();
//int numPyrd = info.NbPyramids();
//int numPris = info.NbPrisms();
//int numHedr = info.NbPolyhedrons();
int index=0;
std::map<const SMDS_MeshNode*, int> mapNodeIndex;
// set the point coordinates
coords->point.setNum(numNode);
SMDS_NodeIteratorPtr aNodeIter = data->nodesIterator();
unsigned int i=0;
SbVec3f* verts = coords->point.startEditing();
for (;aNodeIter->more();) {
const SMDS_MeshNode* aNode = aNodeIter->next();
verts[i++].setValue((float)aNode->X(),(float)aNode->Y(),(float)aNode->Z());
mapNodeIndex[aNode] = index++;
}
coords->point.finishEditing();
// set the face indices
index=0;
faces->coordIndex.setNum(4*numTria + 5*numQuad + 16*numTetr);
int32_t* indices = faces->coordIndex.startEditing();
SMDS_FaceIteratorPtr aFaceIter = data->facesIterator();
for (;aFaceIter->more();) {
const SMDS_MeshFace* aFace = aFaceIter->next();
int num = aFace->NbNodes();
if (num != 3 && num != 4)
continue;
for (int j=0; j<num;j++) {
const SMDS_MeshNode* node = aFace->GetNode(j);
indices[index++] = mapNodeIndex[node];
}
indices[index++] = SO_END_FACE_INDEX;
}
SMDS_VolumeIteratorPtr aVolIter = data->volumesIterator();
for (;aVolIter->more();) {
const SMDS_MeshVolume* aVol = aVolIter->next();
int num = aVol->NbNodes();
if (num != 4)
continue;
int i1 = mapNodeIndex[aVol->GetNode(0)];
int i2 = mapNodeIndex[aVol->GetNode(1)];
int i3 = mapNodeIndex[aVol->GetNode(2)];
int i4 = mapNodeIndex[aVol->GetNode(3)];
indices[index++] = i1;
indices[index++] = i3;
indices[index++] = i2;
indices[index++] = SO_END_FACE_INDEX;
indices[index++] = i1;
indices[index++] = i2;
indices[index++] = i4;
indices[index++] = SO_END_FACE_INDEX;
indices[index++] = i1;
indices[index++] = i4;
indices[index++] = i3;
indices[index++] = SO_END_FACE_INDEX;
indices[index++] = i2;
indices[index++] = i3;
indices[index++] = i4;
indices[index++] = SO_END_FACE_INDEX;
}
faces->coordIndex.finishEditing();
}
Mesh::MeshObject* Mesher::createMesh() const
{
#ifndef HAVE_SMESH
throw Base::Exception("SMESH is not available on this platform");
#else
std::list<SMESH_Hypothesis*> hypoth;
SMESH_Gen* meshgen = SMESH_Gen::get();
SMESH_Mesh* mesh = meshgen->CreateMesh(0, true);
int hyp=0;
switch (method) {
#if defined (HAVE_NETGEN)
case Netgen: {
NETGENPlugin_Hypothesis_2D* hyp2d = new NETGENPlugin_Hypothesis_2D(hyp++,0,meshgen);
if (fineness >=0 && fineness < 5) {
hyp2d->SetFineness(NETGENPlugin_Hypothesis_2D::Fineness(fineness));
}
// user defined values
else {
if (growthRate > 0)
hyp2d->SetGrowthRate(growthRate);
if (nbSegPerEdge > 0)
hyp2d->SetNbSegPerEdge(nbSegPerEdge);
if (nbSegPerRadius > 0)
hyp2d->SetNbSegPerRadius(nbSegPerRadius);
}
hyp2d->SetQuadAllowed(allowquad);
hyp2d->SetOptimize(optimize);
hyp2d->SetSecondOrder(secondOrder); // apply bisecting to create four triangles out of one
hypoth.push_back(hyp2d);
NETGENPlugin_NETGEN_2D* alg2d = new NETGENPlugin_NETGEN_2D(hyp++,0,meshgen);
hypoth.push_back(alg2d);
} break;
#endif
#if defined (HAVE_MEFISTO)
case Mefisto: {
if (maxLength > 0) {
StdMeshers_MaxLength* hyp1d = new StdMeshers_MaxLength(hyp++, 0, meshgen);
hyp1d->SetLength(maxLength);
hypoth.push_back(hyp1d);
}
else if (localLength > 0) {
StdMeshers_LocalLength* hyp1d = new StdMeshers_LocalLength(hyp++,0,meshgen);
hyp1d->SetLength(localLength);
hypoth.push_back(hyp1d);
}
else if (maxArea > 0) {
StdMeshers_MaxElementArea* hyp2d = new StdMeshers_MaxElementArea(hyp++,0,meshgen);
hyp2d->SetMaxArea(maxArea);
hypoth.push_back(hyp2d);
}
else if (deflection > 0) {
StdMeshers_Deflection1D* hyp1d = new StdMeshers_Deflection1D(hyp++,0,meshgen);
hyp1d->SetDeflection(deflection);
hypoth.push_back(hyp1d);
}
else if (minLen > 0 && maxLen > 0) {
StdMeshers_Arithmetic1D* hyp1d = new StdMeshers_Arithmetic1D(hyp++,0,meshgen);
hyp1d->SetLength(minLen, false);
hyp1d->SetLength(maxLen, true);
hypoth.push_back(hyp1d);
}
else {
StdMeshers_AutomaticLength* hyp1d = new StdMeshers_AutomaticLength(hyp++,0,meshgen);
hypoth.push_back(hyp1d);
}
{
StdMeshers_NumberOfSegments* hyp1d = new StdMeshers_NumberOfSegments(hyp++,0,meshgen);
hyp1d->SetNumberOfSegments(1);
hypoth.push_back(hyp1d);
}
if (regular) {
StdMeshers_Regular_1D* hyp1d = new StdMeshers_Regular_1D(hyp++,0,meshgen);
hypoth.push_back(hyp1d);
}
StdMeshers_TrianglePreference* hyp2d_1 = new StdMeshers_TrianglePreference(hyp++,0,meshgen);
hypoth.push_back(hyp2d_1);
StdMeshers_MEFISTO_2D* alg2d = new StdMeshers_MEFISTO_2D(hyp++,0,meshgen);
hypoth.push_back(alg2d);
} break;
#endif
default:
break;
}
// Set new cout
MeshingOutput stdcout;
std::streambuf* oldcout = std::cout.rdbuf(&stdcout);
// Apply the hypothesis and create the mesh
mesh->ShapeToMesh(shape);
for (int i=0; i<hyp;i++)
mesh->AddHypothesis(shape, i);
meshgen->Compute(*mesh, mesh->GetShapeToMesh());
// Restore old cout
std::cout.rdbuf(oldcout);
// build up the mesh structure
SMDS_FaceIteratorPtr aFaceIter = mesh->GetMeshDS()->facesIterator();
SMDS_NodeIteratorPtr aNodeIter = mesh->GetMeshDS()->nodesIterator();
MeshCore::MeshPointArray verts;
MeshCore::MeshFacetArray faces;
verts.reserve(mesh->NbNodes());
faces.reserve(mesh->NbFaces());
int index=0;
std::map<const SMDS_MeshNode*, int> mapNodeIndex;
for (;aNodeIter->more();) {
const SMDS_MeshNode* aNode = aNodeIter->next();
MeshCore::MeshPoint p;
p.Set((float)aNode->X(), (float)aNode->Y(), (float)aNode->Z());
verts.push_back(p);
mapNodeIndex[aNode] = index++;
}
for (;aFaceIter->more();) {
const SMDS_MeshFace* aFace = aFaceIter->next();
if (aFace->NbNodes() == 3) {
MeshCore::MeshFacet f;
for (int i=0; i<3;i++) {
const SMDS_MeshNode* node = aFace->GetNode(i);
f._aulPoints[i] = mapNodeIndex[node];
}
faces.push_back(f);
}
else if (aFace->NbNodes() == 4) {
MeshCore::MeshFacet f1, f2;
const SMDS_MeshNode* node0 = aFace->GetNode(0);
const SMDS_MeshNode* node1 = aFace->GetNode(1);
const SMDS_MeshNode* node2 = aFace->GetNode(2);
const SMDS_MeshNode* node3 = aFace->GetNode(3);
f1._aulPoints[0] = mapNodeIndex[node0];
f1._aulPoints[1] = mapNodeIndex[node1];
f1._aulPoints[2] = mapNodeIndex[node2];
f2._aulPoints[0] = mapNodeIndex[node0];
f2._aulPoints[1] = mapNodeIndex[node2];
f2._aulPoints[2] = mapNodeIndex[node3];
faces.push_back(f1);
faces.push_back(f2);
}
else if (aFace->NbNodes() == 6) {
MeshCore::MeshFacet f1, f2, f3, f4;
const SMDS_MeshNode* node0 = aFace->GetNode(0);
const SMDS_MeshNode* node1 = aFace->GetNode(1);
const SMDS_MeshNode* node2 = aFace->GetNode(2);
const SMDS_MeshNode* node3 = aFace->GetNode(3);
const SMDS_MeshNode* node4 = aFace->GetNode(4);
const SMDS_MeshNode* node5 = aFace->GetNode(5);
f1._aulPoints[0] = mapNodeIndex[node0];
f1._aulPoints[1] = mapNodeIndex[node3];
f1._aulPoints[2] = mapNodeIndex[node5];
f2._aulPoints[0] = mapNodeIndex[node1];
f2._aulPoints[1] = mapNodeIndex[node4];
f2._aulPoints[2] = mapNodeIndex[node3];
f3._aulPoints[0] = mapNodeIndex[node2];
f3._aulPoints[1] = mapNodeIndex[node5];
f3._aulPoints[2] = mapNodeIndex[node4];
f4._aulPoints[0] = mapNodeIndex[node3];
f4._aulPoints[1] = mapNodeIndex[node4];
f4._aulPoints[2] = mapNodeIndex[node5];
faces.push_back(f1);
faces.push_back(f2);
faces.push_back(f3);
faces.push_back(f4);
}
else if (aFace->NbNodes() == 8) {
MeshCore::MeshFacet f1, f2, f3, f4, f5, f6;
const SMDS_MeshNode* node0 = aFace->GetNode(0);
const SMDS_MeshNode* node1 = aFace->GetNode(1);
const SMDS_MeshNode* node2 = aFace->GetNode(2);
const SMDS_MeshNode* node3 = aFace->GetNode(3);
const SMDS_MeshNode* node4 = aFace->GetNode(4);
const SMDS_MeshNode* node5 = aFace->GetNode(5);
const SMDS_MeshNode* node6 = aFace->GetNode(6);
const SMDS_MeshNode* node7 = aFace->GetNode(7);
f1._aulPoints[0] = mapNodeIndex[node0];
f1._aulPoints[1] = mapNodeIndex[node4];
f1._aulPoints[2] = mapNodeIndex[node7];
f2._aulPoints[0] = mapNodeIndex[node1];
f2._aulPoints[1] = mapNodeIndex[node5];
f2._aulPoints[2] = mapNodeIndex[node4];
f3._aulPoints[0] = mapNodeIndex[node2];
f3._aulPoints[1] = mapNodeIndex[node6];
f3._aulPoints[2] = mapNodeIndex[node5];
f4._aulPoints[0] = mapNodeIndex[node3];
f4._aulPoints[1] = mapNodeIndex[node7];
f4._aulPoints[2] = mapNodeIndex[node6];
// Two solutions are possible:
// <4,6,7>, <4,5,6> or <4,5,7>, <5,6,7>
Base::Vector3d v4(node4->X(),node4->Y(),node4->Z());
Base::Vector3d v5(node5->X(),node5->Y(),node5->Z());
Base::Vector3d v6(node6->X(),node6->Y(),node6->Z());
Base::Vector3d v7(node7->X(),node7->Y(),node7->Z());
double dist46 = Base::DistanceP2(v4,v6);
double dist57 = Base::DistanceP2(v5,v7);
if (dist46 > dist57) {
f5._aulPoints[0] = mapNodeIndex[node4];
f5._aulPoints[1] = mapNodeIndex[node6];
f5._aulPoints[2] = mapNodeIndex[node7];
f6._aulPoints[0] = mapNodeIndex[node4];
f6._aulPoints[1] = mapNodeIndex[node5];
f6._aulPoints[2] = mapNodeIndex[node6];
}
else {
f5._aulPoints[0] = mapNodeIndex[node4];
f5._aulPoints[1] = mapNodeIndex[node5];
f5._aulPoints[2] = mapNodeIndex[node7];
f6._aulPoints[0] = mapNodeIndex[node5];
f6._aulPoints[1] = mapNodeIndex[node6];
f6._aulPoints[2] = mapNodeIndex[node7];
}
faces.push_back(f1);
faces.push_back(f2);
faces.push_back(f3);
faces.push_back(f4);
faces.push_back(f5);
faces.push_back(f6);
}
else {
Base::Console().Warning("Face with %d nodes ignored\n", aFace->NbNodes());
}
}
// clean up
TopoDS_Shape aNull;
mesh->ShapeToMesh(aNull);
mesh->Clear();
delete mesh;
for (std::list<SMESH_Hypothesis*>::iterator it = hypoth.begin(); it != hypoth.end(); ++it)
delete *it;
MeshCore::MeshKernel kernel;
kernel.Adopt(verts, faces, true);
Mesh::MeshObject* meshdata = new Mesh::MeshObject();
meshdata->swap(kernel);
return meshdata;
#endif // HAVE_SMESH
}
