Vector StructuredGridBase::cellCenter(Index elem) const
{
Index dims[3];
for (int c=0; c<3; ++c) {
dims[c] = getNumDivisions(c);
}
auto verts = cellVertices(elem, dims);
Vector center(0);
for (auto v: verts) {
center += getVertex(v);
}
center *= 1./8;
return center;
}
// GET INTERPOLATOR
//-------------------------------------------------------------------------
GridInterface::Interpolator RectilinearGrid::getInterpolator(Index elem, const Vector &point, DataBase::Mapping mapping, GridInterface::InterpolationMode mode) const {
vassert(inside(elem, point));
#ifdef INTERPOL_DEBUG
if (!inside(elem, point)) {
return Interpolator();
}
#endif
if (mapping == DataBase::Element) {
std::vector<Scalar> weights(1, 1.);
std::vector<Index> indices(1, elem);
return Interpolator(weights, indices);
}
std::array<Index,3> n = cellCoordinates(elem, m_numDivisions);
std::array<Index,8> cl = cellVertices(elem, m_numDivisions);
Vector corner0(m_coords[0][n[0]], m_coords[1][n[1]], m_coords[2][n[2]]);
Vector corner1(m_coords[0][n[0]+1], m_coords[1][n[1]+1], m_coords[2][n[2]+1]);
const Vector diff = point-corner0;
const Vector size = corner1-corner0;
const Index nvert = 8;
std::vector<Index> indices((mode==Linear || mode==Mean) ? nvert : 1);
std::vector<Scalar> weights((mode==Linear || mode==Mean) ? nvert : 1);
if (mode == Mean) {
const Scalar w = Scalar(1)/nvert;
for (Index i=0; i<nvert; ++i) {
indices[i] = cl[i];
weights[i] = w;
}
} else if (mode == Linear) {
vassert(nvert == 8);
for (Index i=0; i<nvert; ++i) {
indices[i] = cl[i];
}
Vector ss = diff;
for (int c=0; c<3; ++c) {
ss[c] /= size[c];
}
weights[0] = (1-ss[0])*(1-ss[1])*(1-ss[2]);
weights[1] = ss[0]*(1-ss[1])*(1-ss[2]);
weights[2] = ss[0]*ss[1]*(1-ss[2]);
weights[3] = (1-ss[0])*ss[1]*(1-ss[2]);
weights[4] = (1-ss[0])*(1-ss[1])*ss[2];
weights[5] = ss[0]*(1-ss[1])*ss[2];
weights[6] = ss[0]*ss[1]*ss[2];
weights[7] = (1-ss[0])*ss[1]*ss[2];
} else {
weights[0] = 1;
if (mode == First) {
indices[0] = cl[0];
} else if(mode == Nearest) {
Vector ss = diff;
int nearest=0;
for (int c=0; c<3; ++c) {
nearest <<= 1;
ss[c] /= size[c];
if (ss[c] < 0.5)
nearest |= 1;
}
indices[0] = cl[nearest];
}
}
return Interpolator(weights, indices);
}
bool Foam::conformalVoronoiMesh::distributeBackground(const Triangulation& mesh)
{
if (!Pstream::parRun())
{
return false;
}
Info<< nl << "Redistributing points" << endl;
timeCheck("Before distribute");
label iteration = 0;
scalar previousLoadUnbalance = 0;
while (true)
{
scalar maxLoadUnbalance = mesh.calculateLoadUnbalance();
if
(
maxLoadUnbalance <= foamyHexMeshControls().maxLoadUnbalance()
|| maxLoadUnbalance <= previousLoadUnbalance
)
{
// If this is the first iteration, return false, if it was a
// subsequent one, return true;
return iteration != 0;
}
previousLoadUnbalance = maxLoadUnbalance;
Info<< " Total number of vertices before redistribution "
<< returnReduce(label(mesh.number_of_vertices()), sumOp<label>())
<< endl;
const fvMesh& bMesh = decomposition_().mesh();
volScalarField cellWeights
(
IOobject
(
"cellWeights",
bMesh.time().timeName(),
bMesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
bMesh,
dimensionedScalar("weight", dimless, 1e-2),
zeroGradientFvPatchScalarField::typeName
);
meshSearch cellSearch(bMesh, polyMesh::FACE_PLANES);
labelList cellVertices(bMesh.nCells(), label(0));
for
(
typename Triangulation::Finite_vertices_iterator vit
= mesh.finite_vertices_begin();
vit != mesh.finite_vertices_end();
++vit
)
{
// Only store real vertices that are not feature vertices
if (vit->real() && !vit->featurePoint())
{
pointFromPoint v = topoint(vit->point());
label cellI = cellSearch.findCell(v);
if (cellI == -1)
{
// Pout<< "findCell conformalVoronoiMesh::distribute "
// << "findCell "
// << vit->type() << " "
// << vit->index() << " "
// << v << " "
// << cellI
// << " find nearest cellI ";
cellI = cellSearch.findNearestCell(v);
}
cellVertices[cellI]++;
}
}
forAll(cellVertices, cI)
{
// Give a small but finite weight for empty cells. Some
// decomposition methods have difficulty with integer overflows in
// the sum of the normalised weight field.
cellWeights.internalField()[cI] = max
(
cellVertices[cI],
1e-2
);
}
autoPtr<mapDistributePolyMesh> mapDist = decomposition_().distribute
(
cellWeights
);
cellShapeControl_.shapeControlMesh().distribute(decomposition_);
distribute();
timeCheck("After distribute");
iteration++;
}