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add a flexible sparse matrix class designed for fast matrix assembly

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This commit is contained in:
Gael Guennebaud
2009-01-19 15:20:45 +00:00
parent 385fd3d918
commit 178858f1bd
12 changed files with 512 additions and 117 deletions
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43
test/sparse.h
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@@ -94,6 +94,49 @@ initSparse(double density,
sparseMat.endFill();
}
template<typename Scalar> void
initSparse(double density,
Matrix<Scalar,Dynamic,Dynamic>& refMat,
DynamicSparseMatrix<Scalar>& sparseMat,
int flags = 0,
std::vector<Vector2i>* zeroCoords = 0,
std::vector<Vector2i>* nonzeroCoords = 0)
{
sparseMat.startFill(int(refMat.rows()*refMat.cols()*density));
for(int j=0; j<refMat.cols(); j++)
{
for(int i=0; i<refMat.rows(); i++)
{
Scalar v = (ei_random<double>(0,1) < density) ? ei_random<Scalar>() : Scalar(0);
if ((flags&ForceNonZeroDiag) && (i==j))
{
v = ei_random<Scalar>()*Scalar(3.);
v = v*v + Scalar(5.);
}
if ((flags & MakeLowerTriangular) && j>i)
v = Scalar(0);
else if ((flags & MakeUpperTriangular) && j<i)
v = Scalar(0);
if ((flags&ForceRealDiag) && (i==j))
v = ei_real(v);
if (v!=Scalar(0))
{
sparseMat.fill(i,j) = v;
if (nonzeroCoords)
nonzeroCoords->push_back(Vector2i(i,j));
}
else if (zeroCoords)
{
zeroCoords->push_back(Vector2i(i,j));
}
refMat(i,j) = v;
}
}
sparseMat.endFill();
}
template<typename Scalar> void
initSparse(double density,
Matrix<Scalar,Dynamic,1>& refVec,