Functions
template<int dim, typename AdditionalData >
void	categorize_by_boundary_ids (const Triangulation< dim > &tria, AdditionalData &additional_data)

template<int dim, int fe_degree, int n_q_points_1d, int n_components, typename Number , typename VectorizedArrayType , typename VectorType >
void	compute_diagonal (const MatrixFree< dim, Number, VectorizedArrayType > &matrix_free, VectorType &diagonal_global, const std::function< void(FEEvaluation< dim, fe_degree, n_q_points_1d, n_components, Number, VectorizedArrayType > &)> &local_vmult, const unsigned int dof_no=0, const unsigned int quad_no=0, const unsigned int first_selected_component=0)

template<typename CLASS , int dim, int fe_degree, int n_q_points_1d, int n_components, typename Number , typename VectorizedArrayType , typename VectorType >
void	compute_diagonal (const MatrixFree< dim, Number, VectorizedArrayType > &matrix_free, VectorType &diagonal_global, void(CLASS::cell_operation)(FEEvaluation< dim, fe_degree, n_q_points_1d, n_components, Number, VectorizedArrayType > &) const, const CLASS owning_class, const unsigned int dof_no=0, const unsigned int quad_no=0, const unsigned int first_selected_component=0)

template<int dim, int fe_degree, int n_q_points_1d, int n_components, typename Number , typename VectorizedArrayType , typename MatrixType >
void	compute_matrix (const MatrixFree< dim, Number, VectorizedArrayType > &matrix_free, const AffineConstraints< Number > &constraints, MatrixType &matrix, const std::function< void(FEEvaluation< dim, fe_degree, n_q_points_1d, n_components, Number, VectorizedArrayType > &)> &local_vmult, const unsigned int dof_no=0, const unsigned int quad_no=0, const unsigned int first_selected_component=0)

template<typename CLASS , int dim, int fe_degree, int n_q_points_1d, int n_components, typename Number , typename VectorizedArrayType , typename MatrixType >
void	compute_matrix (const MatrixFree< dim, Number, VectorizedArrayType > &matrix_free, const AffineConstraints< Number > &constraints, MatrixType &matrix, void(CLASS::cell_operation)(FEEvaluation< dim, fe_degree, n_q_points_1d, n_components, Number, VectorizedArrayType > &) const, const CLASS owning_class, const unsigned int dof_no=0, const unsigned int quad_no=0, const unsigned int first_selected_component=0)

Detailed Description

A namespace for utility functions in the context of matrix-free operator evaluation.

Function Documentation

◆ categorize_by_boundary_ids()

template<int dim, typename AdditionalData >

void MatrixFreeTools::categorize_by_boundary_ids	(	const Triangulation< dim > &	tria,
		AdditionalData &	additional_data
	)

Modify additional_data so that cells are categorized according to their boundary IDs, making face integrals in the case of cell-centric loop simpler.

◆ compute_diagonal() [1/2]

template<int dim, int fe_degree, int n_q_points_1d, int n_components, typename Number , typename VectorizedArrayType , typename VectorType >

void MatrixFreeTools::compute_diagonal	(	const MatrixFree< dim, Number, VectorizedArrayType > &	matrix_free,
		VectorType &	diagonal_global,
		const std::function< void(FEEvaluation< dim, fe_degree, n_q_points_1d, n_components, Number, VectorizedArrayType > &)> &	local_vmult,
		const unsigned int	dof_no = `0`,
		const unsigned int	quad_no = `0`,
		const unsigned int	first_selected_component = `0`
	)

Compute the diagonal of a linear operator (diagonal_global), given matrix_free and the local cell integral operation local_vmult. The vector is initialized to the right size in the function.

The parameters dof_no, quad_no, and first_selected_component are passed to the constructor of the FEEvaluation that is internally set up.

◆ compute_diagonal() [2/2]

template<typename CLASS , int dim, int fe_degree, int n_q_points_1d, int n_components, typename Number , typename VectorizedArrayType , typename VectorType >

void MatrixFreeTools::compute_diagonal	(	const MatrixFree< dim, Number, VectorizedArrayType > &	matrix_free,
		VectorType &	diagonal_global,
		void(CLASS::*)(FEEvaluation< dim, fe_degree, n_q_points_1d, n_components, Number, VectorizedArrayType > &) const	cell_operation,
		const CLASS *	owning_class,
		const unsigned int	dof_no = `0`,
		const unsigned int	quad_no = `0`,
		const unsigned int	first_selected_component = `0`
	)

Same as above but with a class and a function pointer.

◆ compute_matrix() [1/2]

template<int dim, int fe_degree, int n_q_points_1d, int n_components, typename Number , typename VectorizedArrayType , typename MatrixType >

void MatrixFreeTools::compute_matrix	(	const MatrixFree< dim, Number, VectorizedArrayType > &	matrix_free,
		const AffineConstraints< Number > &	constraints,
		MatrixType &	matrix,
		const std::function< void(FEEvaluation< dim, fe_degree, n_q_points_1d, n_components, Number, VectorizedArrayType > &)> &	local_vmult,
		const unsigned int	dof_no = `0`,
		const unsigned int	quad_no = `0`,
		const unsigned int	first_selected_component = `0`
	)

Compute the matrix representation of a linear operator (matrix), given matrix_free and the local cell integral operation local_vmult. Constrained entries on the diagonal are set to one.