#include "SMESH_Gen.hxx"
#include "SMESH_Mesh.hxx"
#include "SMESH_Comment.hxx"
+#include "SMESH_MesherHelper.hxx"
#include "SMDS_MeshElement.hxx"
#include "SMDS_MeshNode.hxx"
return true;
}
+//=======================================================================
+//function : writeFaces
+//purpose : Write Faces in case if generate 3D mesh w/o geometry
+//=======================================================================
+
+static bool writeFaces (ofstream & theFile,
+ SMESHDS_Mesh * theMesh,
+ vector <const SMDS_MeshNode*> & theNodeByGhs3dId)
+{
+ // record structure:
+ //
+ // NB_ELEMS DUMMY_INT
+ // Loop from 1 to NB_ELEMS
+ // NB_NODES NODE_NB_1 NODE_NB_2 ... (NB_NODES + 1) times: DUMMY_INT
+
+
+ int nbFaces = 0;
+ list< const SMDS_MeshElement* > faces;
+ list< const SMDS_MeshElement* >::iterator f;
+ map< const SMDS_MeshNode*,int >::iterator it;
+ SMDS_ElemIteratorPtr nodeIt;
+ const SMDS_MeshElement* elem;
+ int nbNodes;
+
+ const char* space = " ";
+ const int dummyint = 0;
+
+ //get all faces from mesh
+ SMDS_FaceIteratorPtr eIt = theMesh->facesIterator();
+ while ( eIt->more() ) {
+ const SMDS_MeshElement* elem = eIt->next();
+ if ( !elem )
+ return false;
+ faces.push_back( elem );
+ nbFaces++;
+ }
+
+ if ( nbFaces == 0 )
+ return false;
+
+ cout << "The initial 2D mesh contains " << nbFaces << " faces and ";
+
+ // NB_ELEMS DUMMY_INT
+ theFile << space << nbFaces << space << dummyint << endl;
+
+ // Loop from 1 to NB_ELEMS
+
+ map<const SMDS_MeshNode*,int> aNodeToGhs3dIdMap;
+ f = faces.begin();
+ for ( ; f != faces.end(); ++f )
+ {
+ // NB_NODES PER FACE
+ elem = *f;
+ nbNodes = elem->NbNodes();
+ theFile << space << nbNodes;
+
+ // NODE_NB_1 NODE_NB_2 ...
+ nodeIt = elem->nodesIterator();
+ while ( nodeIt->more() )
+ {
+ // find GHS3D ID
+ const SMDS_MeshNode* node = castToNode( nodeIt->next() );
+ int newId = aNodeToGhs3dIdMap.size() + 1; // ghs3d ids count from 1
+ it = aNodeToGhs3dIdMap.insert( make_pair( node, newId )).first;
+ theFile << space << it->second;
+ }
+
+ // (NB_NODES + 1) times: DUMMY_INT
+ for ( int i=0; i<=nbNodes; i++)
+ theFile << space << dummyint;
+
+ theFile << endl;
+ }
+
+ // put nodes to theNodeByGhs3dId vector
+ theNodeByGhs3dId.resize( aNodeToGhs3dIdMap.size() );
+ map<const SMDS_MeshNode*,int>::const_iterator n2id = aNodeToGhs3dIdMap.begin();
+ for ( ; n2id != aNodeToGhs3dIdMap.end(); ++ n2id)
+ {
+ theNodeByGhs3dId[ n2id->second - 1 ] = n2id->first; // ghs3d ids count from 1
+ }
+
+ return true;
+
+}
+
//=======================================================================
//function : writePoints
//purpose :
//purpose :
//=======================================================================
+static bool readResultFile(const int fileOpen,
+ SMESHDS_Mesh* theMeshDS,
+ TopoDS_Shape aSolid,
+ vector <const SMDS_MeshNode*>& theNodeByGhs3dId) {
+
+ struct stat status;
+ size_t length;
+
+ char *ptr, *mapPtr;
+ char *tetraPtr;
+ char *shapePtr;
+
+ int fileStat;
+ int nbElems, nbNodes, nbInputNodes;
+ int nodeId, triangleId;
+ int tab[3];
+ int nbTriangle;
+ int ID, shapeID;
+
+ double coord [3];
+
+ SMDS_MeshNode * aNewNode;
+ const SMDS_MeshNode * node[4];
+ map <int,const SMDS_MeshNode*>::iterator IdNode;
+ SMDS_MeshElement* aTet;
+
+ // Read the file state
+ fileStat = fstat(fileOpen, &status);
+ length = status.st_size;
+
+ // Mapping the result file into memory
+ ptr = (char *) mmap(0,length,PROT_READ,MAP_PRIVATE,fileOpen,0);
+ mapPtr = ptr;
+
+ ptr = readMapIntLine(ptr, tab);
+ tetraPtr = ptr;
+
+ nbElems = tab[0];
+ nbNodes = tab[1];
+ nbInputNodes = tab[2];
+
+ theNodeByGhs3dId.resize( nbNodes );
+
+ // Reading the nodeId
+ for (int i=0; i < 4*nbElems; i++)
+ nodeId = strtol(ptr, &ptr, 10);
+
+ // Reading the nodeCoor and update the nodeMap
+ shapeID = theMeshDS->ShapeToIndex( aSolid );
+ for (int iNode=0; iNode < nbNodes; iNode++) {
+ for (int iCoor=0; iCoor < 3; iCoor++)
+ coord[ iCoor ] = strtod(ptr, &ptr);
+ if ((iNode+1) > nbInputNodes) {
+ aNewNode = theMeshDS->AddNode( coord[0],coord[1],coord[2] );
+ theMeshDS->SetNodeInVolume( aNewNode, shapeID );
+ theNodeByGhs3dId[ iNode ] = aNewNode;
+ }
+ }
+
+ // Reading the triangles
+ nbTriangle = strtol(ptr, &ptr, 10);
+
+ for (int i=0; i < 3*nbTriangle; i++)
+ triangleId = strtol(ptr, &ptr, 10);
+
+ shapePtr = ptr;
+
+ // Associating the tetrahedrons to the shapes
+ for (int iElem = 0; iElem < nbElems; iElem++) {
+ for (int iNode = 0; iNode < 4; iNode++) {
+ ID = strtol(tetraPtr, &tetraPtr, 10);
+ node[ iNode ] = theNodeByGhs3dId[ ID-1 ];
+ }
+ aTet = theMeshDS->AddVolume( node[1], node[0], node[2], node[3] );
+ shapeID = theMeshDS->ShapeToIndex( aSolid );
+ theMeshDS->SetMeshElementOnShape( aTet, shapeID );
+ }
+ if ( nbElems )
+ cout << nbElems << " tetrahedrons have been associated to " << nbTriangle << " shapes" << endl;
+ munmap(mapPtr, length);
+ close(fileOpen);
+ return true;
+}
+
static bool readResultFile(const int fileOpen,
SMESHDS_Mesh* theMeshDS,
TopoDS_Shape tabShape[],
return true;
}
+
+
//=======================================================================
//function : getTmpDir
//purpose :
return Ok;
}
+
+
+//=============================================================================
+/*!
+ *Here we are going to use the GHS3D mesher w/o geometry
+ */
+//=============================================================================
+bool GHS3DPlugin_GHS3D::Compute(SMESH_Mesh& theMesh,
+ SMESH_MesherHelper* aHelper)
+{
+ MESSAGE("GHS3DPlugin_GHS3D::Compute()");
+
+ SMESHDS_Mesh* meshDS = theMesh.GetMeshDS();
+ TopoDS_Shape theShape = aHelper->GetSubShape();
+
+ // make a unique working file name
+ // to avoid access to the same files by eg different users
+
+ TCollection_AsciiString aGenericName, aTmpDir = getTmpDir();
+ aGenericName = aTmpDir + "GHS3D_";
+#ifdef WIN32
+ aGenericName += GetCurrentProcessId();
+#else
+ aGenericName += getpid();
+#endif
+ aGenericName += "_";
+ aGenericName += meshDS->ShapeToIndex( theShape );
+
+ TCollection_AsciiString aFacesFileName, aPointsFileName, aResultFileName;
+ TCollection_AsciiString aBadResFileName, aBbResFileName, aLogFileName;
+ aFacesFileName = aGenericName + ".faces"; // in faces
+ aPointsFileName = aGenericName + ".points"; // in points
+ aResultFileName = aGenericName + ".noboite";// out points and volumes
+ aBadResFileName = aGenericName + ".boite"; // out bad result
+ aBbResFileName = aGenericName + ".bb"; // out vertex stepsize
+ aLogFileName = aGenericName + ".log"; // log
+
+ // -----------------
+ // make input files
+ // -----------------
+
+ ofstream aFacesFile ( aFacesFileName.ToCString() , ios::out);
+ ofstream aPointsFile ( aPointsFileName.ToCString() , ios::out);
+ bool Ok =
+#ifdef WIN32
+ aFacesFile->is_open() && aPointsFile->is_open();
+#else
+ aFacesFile.rdbuf()->is_open() && aPointsFile.rdbuf()->is_open();
+#endif
+
+ if (!Ok)
+ return error( SMESH_Comment("Can't write into ") << aTmpDir.ToCString());
+
+ vector <const SMDS_MeshNode*> aNodeByGhs3dId;
+
+ Ok = (writeFaces ( aFacesFile, meshDS, aNodeByGhs3dId ) &&
+ writePoints( aPointsFile, meshDS, aNodeByGhs3dId));
+
+ aFacesFile.close();
+ aPointsFile.close();
+
+ if ( ! Ok ) {
+ if ( !getenv("GHS3D_KEEP_FILES") ) {
+ OSD_File( aFacesFileName ).Remove();
+ OSD_File( aPointsFileName ).Remove();
+ }
+ return error(COMPERR_BAD_INPUT_MESH);
+ }
+
+ // -----------------
+ // run ghs3d mesher WIN32???
+ // -----------------
+
+ // ghs3d need to know amount of memory it may use (MB).
+ // Default memory is defined at ghs3d installation but it may be not enough,
+ // so allow to use about all available memory
+ TCollection_AsciiString memory;
+#ifdef WIN32
+ // ????
+#else
+ struct sysinfo si;
+ int err = sysinfo( &si );
+ if ( !err ) {
+ int freeMem = si.totalram * si.mem_unit / 1024 / 1024;
+ memory = "-m ";
+ memory += int( 0.7 * freeMem );
+ }
+#endif
+
+ TCollection_AsciiString cmd( "ghs3d " ); // command to run
+ cmd +=
+ memory + // memory
+ " -f " + aGenericName + // file to read
+ " 1>" + aLogFileName; // dump into file
+
+
+
+ system( cmd.ToCString() ); // run
+
+ // --------------
+ // read a result
+ // --------------
+ int fileOpen;
+ fileOpen = open( aResultFileName.ToCString(), O_RDONLY);
+ if ( fileOpen < 0 ) {
+ cout << endl;
+ cout << "Error when opening the " << aResultFileName.ToCString() << " file" << endl;
+ cout << endl;
+ Ok = false;
+ }
+ else {
+ Ok = readResultFile( fileOpen, meshDS, theShape ,aNodeByGhs3dId );
+ }
+
+ // ---------------------
+ // remove working files
+ // ---------------------
+
+ if ( Ok ) {
+ OSD_File( aLogFileName ).Remove();
+ }
+ else if ( OSD_File( aLogFileName ).Size() > 0 ) {
+ Ok = error( SMESH_Comment("See ")<< aLogFileName.ToCString() );
+ }
+ else {
+ OSD_File( aLogFileName ).Remove();
+ }
+
+ if ( !getenv("GHS3D_KEEP_FILES") )
+ {
+ OSD_File( aFacesFileName ).Remove();
+ OSD_File( aPointsFileName ).Remove();
+ OSD_File( aResultFileName ).Remove();
+ OSD_File( aBadResFileName ).Remove();
+ OSD_File( aBbResFileName ).Remove();
+ }
+
+ return Ok;
+}
+
+
+
+
+
+
