lf::assemble::EntityVectorProvider Concept Reference

Provides the local element vector for a mesh entity. More...

#include <lf/assemble/assemble.h>

Concept definition

template<class EVP>
concept lf::assemble::EntityVectorProvider =  requires(EVP& evp, const mesh::Entity& e) {
  { evp.isActive(e) } -> std::same_as<bool>;
  { evp.Eval(e) } -> base::EigenMatrix<void, -1, 1>;
}

Detailed Description

Provides the local element vector for a mesh entity.

Description

An EntityVectorProvider is an object that provides a local element vector for a given mesh entity. EntityVectorProvider's are mostly used together with lf::assemble::AssembleVectorLocally to assemble a vector.

Requirements

The type EVP satisfies the Concept EntityVectorProvider if given

• evp an object of type EVP
• e is a const lf::mesh::Entity object
• SCALAR is an Eigen supported scalar datatype (e.g. double)
• ROWS is the number of rows of the local element vector or Eigen::Dynamic

the following expressions are valid:

expression	return type	semantics
evp.isActive(e)	bool	Defines whether the entity e is taken into account by the assembly routine.
evp.Eval(e)	Eigen::Matrix<SCALAR, ROWS, 1>	Returns the local element vector for mesh entity e. Is only called if evp.isActive(e)==true.

Usage scenarios

The concept of a EntityVectorProvider is widely used in the lf::assemble and lf::uscalfe modules:

• The function lf::assemble::AssembleVectorLocally() accepts an EntityVectorProvider which in turn defines the global vector is assembled.

Archetype

• EntityVectorProviderAT

See also

• The concept lf::assemble::EntityMatrixProvider
• AssembleVectorLocally()

Classes modelling this concept

• lf::fe::ScalarLoadElementVectorProvider
• lf::fe::ScalarLoadEdgeVectorProvider
• lf::uscalfe::LinearFELocalLoadVector
• lf::uscalfe::ScalarLoadElementVectorProvider
• lf::uscalfe::ScalarLoadEdgeVectorProvider

Definition at line 211 of file assemble_concepts.h.