VTKFile Class Reference

Output of meshes and functions in VTK/ParaView format. More...

#include <VTKFile.h>

Public Member Functions
	VTKFile (MPI_Comm comm, const std::filesystem::path &filename, const std::string &file_mode)
	Create VTK file.
	~VTKFile ()
	Destructor.
void	close ()
	Close file.
void	flush ()
	Flushes XML files to disk.
template<std::floating_point U>
void	write (const mesh::Mesh< U > &mesh, double time=0.0)
	Write a mesh to file. Supports arbitrary order Lagrange isoparametric cells.
template<dolfinx::scalar T, std::floating_point U = scalar_value_type_t<T>>
void	write (const std::vector< std::reference_wrapper< const fem::Function< T, U > > > &u, double t)
	Write finite elements function with an associated time step.

Detailed Description

Output of meshes and functions in VTK/ParaView format.

Isoparametric meshes of arbitrary degree are supported. For finite element functions, cell-based (DG0) and Lagrange (point-based) functions can be saved. For vertex-based functions the output must be isoparametic, i.e. the geometry and the finite element functions must be defined using the same basis.

Warning

This format is not suitable for checkpointing.

Member Function Documentation

write() [1/2]

template<std::floating_point U>

void write	(	const mesh::Mesh< U > &	mesh,
		double	time = 0.0
	)

Write a mesh to file. Supports arbitrary order Lagrange isoparametric cells.

Parameters

[in]	mesh	Mesh to write to file.
[in]	time	Time parameter to associate with mesh.

write() [2/2]

template<dolfinx::scalar T, std::floating_point U>

void write	(	const std::vector< std::reference_wrapper< const fem::Function< T, U > > > &	u,
		double	t
	)

Write finite elements function with an associated time step.

Precondition

Functions in u cannot be sub-Functions. Extract sub-Functions before output.

All Functions in u with point-wise data must use the same element type (up to the block size) and the element must be (discontinuous) Lagrange. Interpolate fem::Function before output if required.

Parameters

[in]	u	List of functions to write to file
[in]	t	Time parameter to associate with u

Precondition

All Functions in u must share the same mesh

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

• /__w/dolfinx/dolfinx/cpp/dolfinx/io/VTKFile.h
• /__w/dolfinx/dolfinx/cpp/dolfinx/io/VTKFile.cpp