Assembler.h¶

Note

The documentation on this page was automatically extracted from the DOLFIN C++ code and may need to be edited or expanded.

class Assembler¶

Parent class(es)

AssemblerBase

This class provides automated assembly of linear systems, or more generally, assembly of a sparse tensor from a given variational form.

Subdomains for cells and facets may be specified by assigning subdomain indicators specified by MeshFunction to the Form being assembled:

@code{.cpp}

form.dx = cell_domains form.ds = exterior_facet_domains form.dS = interior_facet_domains

@endcode

Assembler()¶: Constructor

void assemble(GenericTensor &A, const Form &a)¶

Assemble tensor from given form

@param[out] A (GenericTensor): The tensor to assemble.
@param[in] a (Form&): The form to assemble the tensor from.

void assemble_cells(GenericTensor &A, const Form &a, UFC &ufc, std::shared_ptr<const MeshFunction<std::size_t>> domains, std::vector<double> *values)¶

Assemble tensor from given form over cells. This function is provided for users who wish to build a customized assembler.

@param[out] A (GenericTensor&): The tensor to assemble.
@param[in] a (Form&): The form to assemble the tensor from.

@param[in] ufc (UFC&) @param[in] domains (MeshFunction<std::size_t>) @param[in] values (std::vector<double>*)

void assemble_exterior_facets(GenericTensor &A, const Form &a, UFC &ufc, std::shared_ptr<const MeshFunction<std::size_t>> domains, std::vector<double> *values)¶

Assemble tensor from given form over exterior facets. This function is provided for users who wish to build a customized assembler.

@param[out] A (GenericTensor): The tensor to assemble.
@param[in] a (Form): The form to assemble the tensor from.

@param[in] ufc (UFC) @param[in] domains (MeshFunction) @param[in] values (std::vector<double>*)

void assemble_interior_facets(GenericTensor &A, const Form &a, UFC &ufc, std::shared_ptr<const MeshFunction<std::size_t>> domains, std::shared_ptr<const MeshFunction<std::size_t>> cell_domains, std::vector<double> *values)¶

Assemble tensor from given form over interior facets. This function is provided for users who wish to build a customized assembler.

@param[out] A (GenericTensor): The tensor to assemble.
@param[in] a (Form): The form to assemble the tensor from.

@param[in] ufc (UFC) @param[in] domains (MeshFunction<std::size_t>) @param[in] cell_domains (MeshFunction<std::size_t>) @param[in] values (std::vector<double>*)

void assemble_vertices(GenericTensor &A, const Form &a, UFC &ufc, std::shared_ptr<const MeshFunction<std::size_t>> domains)¶

Assemble tensor from given form over vertices. This function is provided for users who wish to build a customized assembler.

@param[out] A (GenericTersn): The tensor to assemble.
@param[in] a (Form): The form to assemble the tensor from.

@param[in] ufc (UFC) @param[in] domains (MeshFunction)