EntityVectorProvider

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 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.

Implementing Classes
class	lf::fe::ScalarLoadElementVectorProvider< SCALAR, MESH_FUNCTION >
	Local computation of general element (load) vector for scalar finite elements; volume contributions only. More...
class	lf::fe::ScalarLoadEdgeVectorProvider< SCALAR, FUNCTOR, EDGESELECTOR >
	Local edge contributions to element vector. More...
class	lf::uscalfe::LinearFELocalLoadVector< SCALAR, FUNCTOR >
	Class for computation of local load vector for linear finite elements. More...
class	lf::uscalfe::ScalarLoadElementVectorProvider< SCALAR, MESH_FUNCTION >
	Local computation of general element (load) vector for scalar finite elements; volume contributions only. More...
class	lf::uscalfe::ScalarLoadEdgeVectorProvider< SCALAR, FUNCTOR, EDGESELECTOR >
	Local edge contributions to element vector. More...