vtkPolyData* Foam::vtkPV4Foam::lagrangianVTKMesh
(
const fvMesh& mesh,
const word& cloudName
)
{
vtkPolyData* vtkmesh = NULL;
if (debug)
{
Info<< "<beg> Foam::vtkPV4Foam::lagrangianVTKMesh - timePath "
<< mesh.time().timePath()/cloud::prefix/cloudName << endl;
printMemory();
}
// the region name is already in the mesh db
IOobjectList sprayObjs
(
mesh,
mesh.time().timeName(),
cloud::prefix/cloudName
);
IOobject* positionsPtr = sprayObjs.lookup(word("positions"));
if (positionsPtr)
{
Cloud<passiveParticle> parcels(mesh, cloudName, false);
if (debug)
{
Info<< "cloud with " << parcels.size() << " parcels" << endl;
}
vtkmesh = vtkPolyData::New();
vtkPoints* vtkpoints = vtkPoints::New();
vtkCellArray* vtkcells = vtkCellArray::New();
vtkpoints->Allocate(parcels.size());
vtkcells->Allocate(parcels.size());
vtkIdType particleId = 0;
forAllConstIter(Cloud<passiveParticle>, parcels, iter)
{
vtkInsertNextOpenFOAMPoint(vtkpoints, iter().position());
vtkcells->InsertNextCell(1, &particleId);
particleId++;
}
vtkmesh->SetPoints(vtkpoints);
vtkpoints->Delete();
vtkmesh->SetVerts(vtkcells);
vtkcells->Delete();
}
void mapLagrangian(const meshToMesh& interp)
{
// Determine which particles are in meshTarget
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
const polyMesh& meshSource = interp.srcRegion();
const polyMesh& meshTarget = interp.tgtRegion();
const labelListList& sourceToTarget = interp.srcToTgtCellAddr();
const pointField& targetCc = meshTarget.cellCentres();
fileNameList cloudDirs
(
readDir
(
meshSource.time().timePath()/cloud::prefix,
fileName::DIRECTORY
)
);
forAll(cloudDirs, cloudI)
{
// Search for list of lagrangian objects for this time
IOobjectList objects
(
meshSource,
meshSource.time().timeName(),
cloud::prefix/cloudDirs[cloudI]
);
IOobject* positionsPtr = objects.lookup(word("positions"));
if (positionsPtr)
{
Info<< nl << " processing cloud " << cloudDirs[cloudI] << endl;
// Read positions & cell
passiveParticleCloud sourceParcels
(
meshSource,
cloudDirs[cloudI],
false
);
Info<< " read " << sourceParcels.size()
<< " parcels from source mesh." << endl;
// Construct empty target cloud
passiveParticleCloud targetParcels
(
meshTarget,
cloudDirs[cloudI],
IDLList<passiveParticle>()
);
particle::TrackingData<passiveParticleCloud> td(targetParcels);
label sourceParticleI = 0;
// Indices of source particles that get added to targetParcels
DynamicList<label> addParticles(sourceParcels.size());
// Unmapped particles
labelHashSet unmappedSource(sourceParcels.size());
// Initial: track from fine-mesh cell centre to particle position
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// This requires there to be no boundary in the way.
forAllConstIter(Cloud<passiveParticle>, sourceParcels, iter)
{
bool foundCell = false;
// Assume that cell from read parcel is the correct one...
if (iter().cell() >= 0)
{
const labelList& targetCells =
sourceToTarget[iter().cell()];
// Particle probably in one of the targetcells. Try
// all by tracking from their cell centre to the parcel
// position.
forAll(targetCells, i)
{
// Track from its cellcentre to position to make sure.
autoPtr<passiveParticle> newPtr
(
new passiveParticle
(
meshTarget,
targetCc[targetCells[i]],
targetCells[i]
)
);
passiveParticle& newP = newPtr();
label facei = newP.track(iter().position(), td);
if (facei < 0 && newP.cell() >= 0)
{
// Hit position.
foundCell = true;
addParticles.append(sourceParticleI);
targetParcels.addParticle(newPtr.ptr());
break;
}
}
}
if (!foundCell)
{
// Store for closer analysis
unmappedSource.insert(sourceParticleI);
}
sourceParticleI++;
}
