Dune::Vtk::LagrangeGridCreator< GridType > Class Template Reference

#include <dune/vtk/gridcreators/lagrangegridcreator.hh>

Public Member Functions
void	insertVerticesImpl (std::vector< GlobalCoordinate > const &points, std::vector< std::uint64_t > const &)
	Implementation of the interface function insertVertices()
void	insertElementsImpl (std::vector< std::uint8_t > const &types, std::vector< std::int64_t > const &offsets, std::vector< std::int64_t > const &connectivity)
	Implementation of the interface function insertElements()
LocalParametrization	localParametrization (unsigned int insertionIndex) const
	Construct an element parametrization. More...
LocalParametrization	localParametrization (Element const &element) const
	Construct an element parametrization. More...
LocalGeometry	localGeometry (Element const &element) const
	Construct a transformation of local element coordinates. More...
int	order (GeometryType type, std::size_t nNodes) const
	Determine lagrange order from number of points.
int	order () const
	Determine lagrange order from number of points from the first element parametrization.
EntitySet	entitySet () const
	Dummy function returning a placeholder entityset.
GlobalCoordinate	operator() (GlobalCoordinate const &) const
	Dummy function returning a placeholder entityset.
GridFactory< Grid > &	factory ()
	Return the associated GridFactory.
GridFactory< Grid > const &	factory () const
	Return the associated (const) GridFactory.
void	insertVertices (std::vector< GlobalCoordinate > const &points, std::vector< std::uint64_t > const &point_ids)
	Insert all points as vertices into the factory.
void	insertElements (std::vector< std::uint8_t > const &types, std::vector< std::int64_t > const &offsets, std::vector< std::int64_t > const &connectivity)
	Create elements based on type and connectivity description.
void	insertPieces (std::vector< std::string > const &pieces)
	Insert part of a grid stored in file into factory.
std::unique_ptr< Grid >	createGrid () const
	Construct the actual grid using the GridFactory.
auto	comm () const
	Return the mpi collective communicator.

Friends
LocalFunction	localFunction (LagrangeGridCreator &gridCreator)
	Local function representing the parametrization of the grid. More...

Detailed Description

template<class GridType>
class Dune::Vtk::LagrangeGridCreator< GridType >

The grid is created from the first nodes of a cell parametrization, representing the corner vertices. Thus a piecewise "flat" grid is constructed. The parametrization is 1. passed as a local element parametrization to the insertElement() function of a gridFactory to allow the grid itself to handle the parametrization and 2. is stored internally that can be accessed by using this GridCreator object as a grid function, or by extracting locally the parametrization on each existing grid element after creation of the grid.

So, the LagrangeGridCreator models both, a GridCreator and a GridFunction.

Member Function Documentation

localGeometry()

template<class GridType >

LocalGeometry Dune::Vtk::LagrangeGridCreator< GridType >::localGeometry ( Element const &  element ) const

inline

Construct a transformation of local element coordinates.

An element might have a different local coordinate system than the coordinate system used to defined the element parametrization. Thus coordinate transform of the local parametrization is needed for element-local evaluations. This local geometry transform is obtained by figuring out the permutation of corners in the element corresponding to the inserted corner vertices.

References Dune::Vtk::LagrangeGridCreator< GridType >::factory(), Dune::GridFactoryInterface< GridType >::insertionIndex(), Dune::Vtk::LagrangeGridCreator< GridType >::localGeometry(), and VTK_ASSERT.

Referenced by Dune::Vtk::LagrangeGridCreator< GridType >::localGeometry(), and Dune::Vtk::LagrangeGridCreator< GridType >::localParametrization().

localParametrization() [1/2]

template<class GridType >

LocalParametrization Dune::Vtk::LagrangeGridCreator< GridType >::localParametrization ( Element const &  element ) const

inline

Construct an element parametrization.

The returned LocalParametrization is a mapping GlobalCoordinate(LocalCoordinate) where LocalCoordinate is w.r.t. the local coordinate system in the passed element andGlobalCoordinate` a world coordinate in the parametrized grid.

References Dune::Vtk::LagrangeGridCreator< GridType >::factory(), Dune::GridFactoryInterface< GridType >::insertionIndex(), Dune::Vtk::LagrangeGridCreator< GridType >::localGeometry(), Dune::Vtk::LagrangeGridCreator< GridType >::order(), and VTK_ASSERT.

localParametrization() [2/2]

template<class GridType >

LocalParametrization Dune::Vtk::LagrangeGridCreator< GridType >::localParametrization ( unsigned int  insertionIndex ) const

inline

Construct an element parametrization.

The returned LocalParametrization is a mapping GlobalCoordinate(LocalCoordinate) where LocalCoordinate is w.r.t. the local coordinate system in an element with giveninsertionIndex<tt>(defined by the inserted corner vertices) and GlobalCoordinate` a world coordinate in the parametrized grid.

References Dune::Vtk::LagrangeGridCreator< GridType >::order(), and VTK_ASSERT.

Referenced by Dune::Vtk::LagrangeGridCreator< GridType >::insertElementsImpl().

Friends And Related Function Documentation

localFunction

template<class GridType >

LocalFunction localFunction ( LagrangeGridCreator< GridType > &  gridCreator )

friend

Local function representing the parametrization of the grid.

The returned object models Functions::Concept::LocalFunction and can thus be bound to an element of the created grid and evaluated in the local coordinates of the bound element.

It is implemented in terms of the LocalParametrization function returned by the method localParametrization(element). See comments there for further details.

Note, this methods requires the GridCreator to be based by lvalue-reference. This is necessary, since we want to guarantee that all internal storage is preserved while evaluating the local function.

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The documentation for this class was generated from the following file:

• dune/vtk/gridcreators/lagrangegridcreator.hh