int GeomAssocPairSide::get_all_entities(int dimension,
iBase_EntityHandle **entities,
int *entities_alloc,
int *entities_size)
{
int this_type = (dimension == -1 ? iBase_ALL_TYPES : dimension);
int result;
iGeom_getEntities(instance_, 0, this_type, entities, entities_alloc,
entities_size, &result);
PROCESS_ERROR;
RETURNR(iBase_SUCCESS);
}
void Discretize_Geometric_Model(GeomMesh &geomesh)
{
char *options = NULL;
int optlen = 0;
int err;
iMesh_Instance mesh = geomesh.mesh;
iGeom_Instance geom = geomesh.geom;
iRel_Instance assoc = geomesh.assoc;
iRel_RelationHandle relation00 = geomesh.relation00;
iBase_EntitySetHandle geomRootSet = geomesh.geomRootSet;
///////////////////////////////////////////////////////////////////////////////
// Step I: Collect all the feature nodes in Geometry:
///////////////////////////////////////////////////////////////////////////////
SimpleArray<iBase_EntityHandle> geoNodes;
iGeom_getEntities(geom, geomRootSet, iBase_VERTEX, ARRAY_INOUT(geoNodes), &err);
double x, y, z;
iBase_EntityHandle newHandle;
for (int i = 0; i < geoNodes.size(); i++)
{
iGeom_getVtxCoord(geom, geoNodes[i], &x, &y, &z, &err);
iMesh_createVtx(mesh, x, y, z, &newHandle, &err);
iRel_setEntEntAssociation(assoc, relation00, geoNodes[i], newHandle, &err);
}
///////////////////////////////////////////////////////////////////////////////
// Step II: Collect all the geometric edges and discretize them.
///////////////////////////////////////////////////////////////////////////////
SimpleArray<iBase_EntityHandle> geoEdges;
iGeom_getEntities(geom, geomRootSet, iBase_EDGE, ARRAY_INOUT(geoEdges), &err);
int numGeoEdges = geoEdges.size();
vector<double> elen(numGeoEdges);
for (int i = 0; i < numGeoEdges; i++) {
elen[i] = get_geom_edge_length(geom, geoEdges[i]);
}
vector<double> tmpelen;
tmpelen = elen;
sort( tmpelen.begin(), tmpelen.end() );
double mean_edge_length = tmpelen[numGeoEdges/2];
cout << " Minimum Edge Length : " << *min_element( elen.begin(), elen.end() ) << endl;
cout << " Maximum Edge Length : " << *max_element( elen.begin(), elen.end() ) << endl;
cout << " Mean Length : " << mean_edge_length << endl;
double spacing = mean_edge_length /(double) 10.0;
int numEdges;
EdgeMesher *edgeMesher = geomesh.edgeMesher;
for (int i = 0; i < numGeoEdges; i++) {
if( elen[i] < 0.5*mean_edge_length)
numEdges = 1;
else
numEdges = elen[i]/ spacing;
edgeMesher->discretize(geomesh, geoEdges[i], numEdges);
}
//return;
///////////////////////////////////////////////////////////////////////////////
//Step III: Collect all the geometric faces and discretize them.
///////////////////////////////////////////////////////////////////////////////
SimpleArray<iBase_EntityHandle> geoFaces;
iGeom_getEntities(geom, geomRootSet, iBase_FACE, ARRAY_INOUT(geoFaces), &err);
int numGeomFaces = geoFaces.size();
SurfaceMesher *surfMesher = geomesh.surfMesher;
for (int i = 2; i < numGeomFaces; i++) {
surfMesher->discretize(geomesh, geoFaces[i]);
//exit(0);
}
//return ;
///////////////////////////////////////////////////////////////////////////////
//Step IV: Collect all the geometric regions and discretize them.
///////////////////////////////////////////////////////////////////////////////
SimpleArray<iBase_EntityHandle> geoCells;
iGeom_getEntities(geom, geomRootSet, iBase_REGION, ARRAY_INOUT(geoCells), &err);
VolumeMesher *volMesher = geomesh.volMesher;
for (int i = 0; i < geoCells.size(); i++)
volMesher->discretize(geomesh, geoCells[i]);
///////////////////////////////////////////////////////////////////////////////
//Step V: Generate Spectral (Higher order) elements:
///////////////////////////////////////////////////////////////////////////////
//generate_spectral_elements(geomesh, 10); // 10 noded tetrahedra.
}
