Reference documentation for deal.II version GIT relicensing-214-g6e74dec06b 2024-03-27 18:10:01+00:00
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Public Attributes | List of all members
Triangulation< dim, spacedim >::Signals Struct Reference

#include <deal.II/grid/tria.h>

Public Attributes

boost::signals2::signal< void()> create
 
boost::signals2::signal< void()> pre_refinement
 
boost::signals2::signal< void()> post_refinement
 
boost::signals2::signal< void()> pre_partition
 
boost::signals2::signal< void()> mesh_movement
 
boost::signals2::signal< void(const typename Triangulation< dim, spacedim >::cell_iterator &cell)> pre_coarsening_on_cell
 
boost::signals2::signal< void(const typename Triangulation< dim, spacedim >::cell_iterator &cell)> post_refinement_on_cell
 
boost::signals2::signal< void(const Triangulation< dim, spacedim > &destination_tria)> copy
 
boost::signals2::signal< void()> clear
 
boost::signals2::signal< void()> any_change
 
boost::signals2::signal< unsigned int(const cell_iterator &, const ::CellStatus), CellWeightSum< unsigned int > > weight
 
boost::signals2::signal< void()> pre_distributed_refinement
 
boost::signals2::signal< void()> post_p4est_refinement
 
boost::signals2::signal< void()> post_distributed_refinement
 
boost::signals2::signal< void()> pre_distributed_repartition
 
boost::signals2::signal< void()> post_distributed_repartition
 
boost::signals2::signal< void()> pre_distributed_save
 
boost::signals2::signal< void()> post_distributed_save
 
boost::signals2::signal< void()> pre_distributed_load
 
boost::signals2::signal< void()> post_distributed_load
 

Detailed Description

template<int dim, int spacedim = dim>
struct Triangulation< dim, spacedim >::Signals

A structure that has boost::signal objects for a number of actions that a triangulation can do to itself. Please refer to the "Getting notice when a triangulation changes" section in the general documentation of the Triangulation class for more information and examples.

For documentation on signals, see http://www.boost.org/doc/libs/release/libs/signals2 .

Definition at line 2302 of file tria.h.

Member Data Documentation

◆ create

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::create

This signal is triggered whenever the Triangulation::create_triangulation or Triangulation::copy_triangulation() is called. This signal is also triggered when loading a triangulation from an archive via Triangulation::load().

Definition at line 2311 of file tria.h.

◆ pre_refinement

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::pre_refinement

This signal is triggered at the beginning of execution of the Triangulation::execute_coarsening_and_refinement() function (which is itself called by other functions such as Triangulation::refine_global() ). At the time this signal is triggered, the triangulation is still unchanged.

Definition at line 2320 of file tria.h.

◆ post_refinement

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::post_refinement

This signal is triggered at the end of execution of the Triangulation::execute_coarsening_and_refinement() function when the triangulation has reached its final state.

Definition at line 2327 of file tria.h.

◆ pre_partition

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::pre_partition

This signal is triggered at the beginning of execution of the GridTools::partition_triangulation() and GridTools::partition_triangulation_zorder() functions. At the time this signal is triggered, the triangulation is still unchanged.

Definition at line 2335 of file tria.h.

◆ mesh_movement

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::mesh_movement

This signal is triggered when a function in deal.II moves the grid points of a mesh, e.g. GridTools::transform. Unfortunately, modification of a vertex in user code through cell_iterator->vertex(v) = xxxx cannot be detected by this method.

Definition at line 2344 of file tria.h.

◆ pre_coarsening_on_cell

template<int dim, int spacedim = dim>
boost::signals2::signal<void( const typename Triangulation<dim, spacedim>::cell_iterator &cell)> Triangulation< dim, spacedim >::Signals::pre_coarsening_on_cell

This signal is triggered for each cell that is going to be coarsened.

Note
This signal is triggered with the immediate parent cell of a set of active cells as argument. The children of this parent cell will subsequently be coarsened away.

Definition at line 2355 of file tria.h.

◆ post_refinement_on_cell

template<int dim, int spacedim = dim>
boost::signals2::signal<void( const typename Triangulation<dim, spacedim>::cell_iterator &cell)> Triangulation< dim, spacedim >::Signals::post_refinement_on_cell

This signal is triggered for each cell that just has been refined.

Note
The signal parameter cell corresponds to the immediate parent cell of a set of newly created active cells.

Definition at line 2365 of file tria.h.

◆ copy

template<int dim, int spacedim = dim>
boost::signals2::signal<void( const Triangulation<dim, spacedim> &destination_tria)> Triangulation< dim, spacedim >::Signals::copy

This signal is triggered whenever the triangulation owning the signal is copied by another triangulation using Triangulation::copy_triangulation() (i.e. it is triggered on the old triangulation, but the new one is passed as an argument).

Definition at line 2375 of file tria.h.

◆ clear

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::clear

This signal is triggered whenever the Triangulation::clear() function is called and in the destructor of the triangulation. This signal is also triggered when loading a triangulation from an archive via Triangulation::load() as the previous content of the triangulation is first destroyed.

The signal is triggered before the data structures of the triangulation are destroyed. In other words, the functions attached to this signal get a last look at the triangulation, for example to save information stored as part of the triangulation.

Definition at line 2390 of file tria.h.

◆ any_change

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::any_change

This is a catch-all signal that is triggered whenever the create, post_refinement, or clear signals are triggered. In effect, it can be used to indicate to an object connected to the signal that the triangulation has been changed, whatever the exact cause of the change.

Note
The cell-level signals pre_coarsening_on_cell and post_refinement_on_cell are not connected to this signal.

Definition at line 2401 of file tria.h.

◆ weight

template<int dim, int spacedim = dim>
boost::signals2::signal<unsigned int(const cell_iterator &, const ::CellStatus), CellWeightSum<unsigned int> > Triangulation< dim, spacedim >::Signals::weight

This signal is triggered for each cell during every automatic or manual repartitioning. It is intended to allow a weighted repartitioning of the domain to balance the computational load across processes in a different way than balancing the number of cells. Any connected function is expected to take an iterator to a cell, and a CellStatus argument that indicates whether this cell is going to be refined, coarsened or left untouched (see the documentation of the CellStatus enum for more information). The function is expected to return an unsigned integer, which is interpreted as the additional computational load of this cell.

In serial and parallel shared applications, partitioning happens after refinement. So all cells will have the CellStatus::cell_will_persist status.

In parallel distributed applications, partitioning happens during refinement. If this cell is going to be coarsened, the signal is called for the parent cell and you need to provide the weight of the future parent cell. If this cell is going to be refined, the function is called on all children while cell_iterator refers to their parent cell. In this case, you need to pick a weight for each individual child based on information given by the parent cell.

If several functions are connected to this signal, their return values will be summed to calculate the final weight of a cell. This allows different parts of a larger code base to have their own functions computing the weight of a cell; for example in a code that does both finite element and particle computations on each cell, the code could separate the computation of a cell's weight into two functions, each implemented in their respective files, that provide the finite element-based and the particle-based weights.

This function is used in step-68 and implicitly in step-75 using the parallel::CellWeights class.

Definition at line 2442 of file tria.h.

◆ pre_distributed_refinement

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::pre_distributed_refinement

This signal is triggered at the beginning of execution of the parallel::distributed::Triangulation::execute_coarsening_and_refinement() function (which is itself called by other functions such as Triangulation::refine_global() ). At the time this signal is triggered, the triangulation is still unchanged. This signal is different from the pre_refinement signal, because in the parallel distributed case the pre_refinement signal is triggered multiple times without a way to distinguish the last signal call.

Definition at line 2455 of file tria.h.

◆ post_p4est_refinement

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::post_p4est_refinement

This signal is triggered during execution of the parallel::distributed::Triangulation::execute_coarsening_and_refinement() function. At the time this signal is triggered, the p4est oracle has been refined and the cell relations have been updated. The triangulation is unchanged otherwise, and the p4est oracle has not yet been repartitioned.

Definition at line 2464 of file tria.h.

◆ post_distributed_refinement

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::post_distributed_refinement

This signal is triggered at the end of execution of the parallel::distributed::Triangulation::execute_coarsening_and_refinement() function when the triangulation has reached its final state. This signal is different from the post_refinement signal, because in the parallel distributed case the post_refinement signal is triggered multiple times without a way to distinguish the last signal call.

Definition at line 2474 of file tria.h.

◆ pre_distributed_repartition

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::pre_distributed_repartition

This signal is triggered at the beginning of execution of the parallel::distributed::Triangulation::repartition() function. At the time this signal is triggered, the triangulation is still unchanged.

Definition at line 2481 of file tria.h.

◆ post_distributed_repartition

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::post_distributed_repartition

This signal is triggered at the end of execution of the parallel::distributed::Triangulation::repartition() function when the triangulation has reached its final state.

Definition at line 2488 of file tria.h.

◆ pre_distributed_save

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::pre_distributed_save

This signal is triggered at the beginning of execution of the parallel::distributed::Triangulation::save() function. At the time this signal is triggered, the triangulation is still unchanged.

Definition at line 2496 of file tria.h.

◆ post_distributed_save

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::post_distributed_save

This signal is triggered at the end of execution of the parallel::distributed::Triangulation::save() function when the triangulation has reached its final state.

Definition at line 2503 of file tria.h.

◆ pre_distributed_load

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::pre_distributed_load

This signal is triggered at the beginning of execution of the parallel::distributed::Triangulation::load() function. At the time this signal is triggered, the triangulation is still unchanged.

Definition at line 2511 of file tria.h.

◆ post_distributed_load

template<int dim, int spacedim = dim>
boost::signals2::signal<void()> Triangulation< dim, spacedim >::Signals::post_distributed_load

This signal is triggered at the end of execution of the parallel::distributed::Triangulation::load() function when the triangulation has reached its final state.

Definition at line 2518 of file tria.h.


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