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Add multiple thread kdtree build support for KDTreeEigenMatrixAdaptor #246

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Aug 19, 2024
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Add multiple thread kdtree build support for KDTreeEigenMatrixAdaptor #246

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7 changes: 5 additions & 2 deletions include/nanoflann.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2620,7 +2620,8 @@ struct KDTreeEigenMatrixAdaptor
explicit KDTreeEigenMatrixAdaptor(
const Dimension dimensionality,
const std::reference_wrapper<const MatrixType>& mat,
const int leaf_max_size = 10)
const int leaf_max_size = 10,
const unsigned int n_thread_build = 1)
: m_data_matrix(mat)
{
const auto dims = row_major ? mat.get().cols() : mat.get().rows();
Expand All @@ -2634,7 +2635,9 @@ struct KDTreeEigenMatrixAdaptor
"argument");
index_ = new index_t(
dims, *this /* adaptor */,
nanoflann::KDTreeSingleIndexAdaptorParams(leaf_max_size));
nanoflann::KDTreeSingleIndexAdaptorParams(leaf_max_size,
nanoflann::KDTreeSingleIndexAdaptorFlags::None,
n_thread_build));
}

public:
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