11 #include <dolfinx/fem/utils.h>
12 #include <dolfinx/mesh/Mesh.h>
26 Eigen::Ref<Eigen::Array<T, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor>>
35 Eigen::Array<T, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor> coeffs
45 = mesh->geometry().dofmap();
49 mesh->topology_mutable().create_entity_permutations();
50 const std::vector<std::uint32_t>& cell_info
51 = mesh->topology().get_cell_permutation_info();
54 const int num_dofs_g = x_dofmap.
num_links(0);
55 const Eigen::Array<double, Eigen::Dynamic, 3, Eigen::RowMajor>& x_g
56 = mesh->geometry().x();
59 const int gdim = mesh->geometry().dim();
60 Eigen::Array<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor>
61 coordinate_dofs(num_dofs_g, gdim);
65 for (std::size_t i = 0; i < active_cells.size(); ++i)
67 const std::int32_t c = active_cells[i];
68 auto x_dofs = x_dofmap.
links(c);
69 for (
int j = 0; j < num_dofs_g; ++j)
71 const auto x_dof = x_dofs[j];
72 for (
int k = 0; k < gdim; ++k)
73 coordinate_dofs(j, k) = x_g(x_dof, k);
76 auto coeff_cell = coeffs.row(c);
77 std::fill(values_e.begin(), values_e.end(), 0.0);
78 fn(values_e.data(), coeff_cell.data(), constant_values.data(),
79 coordinate_dofs.data());
81 for (std::size_t j = 0; j < values_e.size(); ++j)
82 values(i, j) = values_e[j];
This class manages coordinate mappings for isoparametric cells.
Definition: CoordinateElement.h:26
Represents a mathematical expression evaluated at a pre-defined set of points on the reference cell....
Definition: Expression.h:39
const std::size_t value_size() const
Get value size.
Definition: Expression.h:136
std::shared_ptr< const mesh::Mesh > mesh() const
Get mesh.
Definition: Expression.h:124
const std::function< void(T *, const T *, const T *, const double *)> & get_tabulate_expression() const
Get function for tabulate_expression.
Definition: Expression.h:108
const Eigen::Index num_points() const
Get number of points.
Definition: Expression.h:140
This class provides a static adjacency list data structure. It is commonly used to store directed gra...
Definition: AdjacencyList.h:46
tcb::span< T > links(int node)
Get the links (edges) for given node.
Definition: AdjacencyList.h:128
int num_links(int node) const
Number of connections for given node.
Definition: AdjacencyList.h:118
Finite element method functionality.
Definition: assemble_matrix_impl.h:24
std::vector< typename U::scalar_type > pack_constants(const U &u)
Pack constants of u of generic type U ready for assembly.
Definition: utils.h:455
Eigen::Array< typename U::scalar_type, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor > pack_coefficients(const U &u)
Pack coefficients of u of generic type U ready for assembly.
Definition: utils.h:400
void eval(Eigen::Ref< Eigen::Array< T, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor >> values, const fem::Expression< T > &e, const std::vector< std::int32_t > &active_cells)
Evaluate a UFC expression.
Definition: evaluate.h:25