DOFMatrix.hpp 2.83 KB
 Praetorius, Simon committed Oct 03, 2018 1 2 3 4 5 6 7 8 9 10 11 12 #pragma once #include #include #include #include #include #include #include  Praetorius, Simon committed Feb 28, 2019 13 14 #include #include  Praetorius, Simon committed Oct 03, 2018 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  namespace AMDiS { /// \brief The basic container that stores a base matrix and a corresponding /// row/column feSpace. template class EigenMatrix { public: /// The matrix type of the underlying base matrix using BaseMatrix = Eigen::SparseMatrix; /// The type of the elements of the DOFMatrix using value_type = ValueType; /// The index/size - type using size_type = typename BaseMatrix::Index; public: /// Constructor. Constructs new BaseMatrix. EigenMatrix() = default; /// Return a reference to the data-matrix \ref matrix BaseMatrix& matrix() { return matrix_; } /// Return a reference to the data-matrix \ref matrix BaseMatrix const& matrix() const { return matrix_; } /// \brief Returns an update-proxy of the inserter, to inserte/update a value at /// position (\p r, \p c) in the matrix. Need an insertionMode inserter, that can /// be created by \ref init and must be closed by \ref finish after insertion. void insert(size_type r, size_type c, value_type const& value) { test_exit_dbg(r < matrix_.rows() && c < matrix_.cols(), "Indices out of range [0,{})x[0,{})", matrix_.rows(), matrix_.cols()); tripletList_.emplace_back(r, c, value); } /// Create inserter. Assumes that no inserter is currently active on this matrix. template void init(RowBasis const& rowBasis, ColBasis const& colBasis, bool prepareForInsertion) { matrix_.resize(rowBasis.dimension(), colBasis.dimension()); if (prepareForInsertion) { matrix_.setZero(); // maybe not necessary } } /// Delete inserter -> finish insertion. Must be called in order to fill the /// final construction of the matrix. void finish() { matrix_.setFromTriplets(tripletList_.begin(), tripletList_.end()); matrix_.makeCompressed(); tripletList_.clear(); // NOTE: this does not free the memory } /// Return the number of nonzeros in the matrix std::size_t nnz() const { return matrix_.nonZeros(); } private: /// The data-matrix BaseMatrix matrix_; /// A list of row,col indices and values std::vector> tripletList_; }; template using DOFMatrix = DOFMatrixBase>; } // end namespace AMDiS