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Fix growth vector calculation (do more vector reduction to avoid strange results from inverting badly conditioned matrix)

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This commit is contained in:
Matthias Hochsteger 2024-10-31 15:49:41 +01:00
parent c27650af0a
commit c27dbdef30
1 changed files with 14 additions and 11 deletions
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25
libsrc/meshing/boundarylayer.cpp
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@ -63,22 +63,25 @@ Vec<3> CalcGrowthVector (FlatArray<Vec<3>> ns)
for (auto j : Range(3))
mat(i, j) = ns[i][j];
if (fabs(mat.Det()) > 1e-6)
if (fabs(mat.Det()) > 1e-2)
{
DenseMatrix mat(3, 3);
for (auto i : Range(3))
for (auto j : Range(3))
mat(i, j) = ns[i] * ns[j];
Vector rhs(3);
rhs = 1.;
Vector res(3);
DenseMatrix inv(3, ns.Size());
CalcInverse(mat, inv);
inv.Mult(rhs, res);
Vec<3> growth = 0.;
for (auto i : Range(ns))
growth += res[i] * ns[i];
return growth;
if (fabs(mat.Det()) > 1e-2)
{
Vector rhs(3);
rhs = 1.;
Vector res(3);
DenseMatrix inv(3, ns.Size());
CalcInverse(mat, inv);
inv.Mult(rhs, res);
Vec<3> growth = 0.;
for (auto i : Range(ns))
growth += res[i] * ns[i];
return growth;
}
}
}
auto [maxpos1, maxpos2] = FindCloseVectors(ns);