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Reference documentation for deal.II version 9.6.0
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#include <deal.II/non_matching/mesh_classifier.h>
Public Member Functions | |
template<typename VectorType > | |
MeshClassifier (const DoFHandler< dim > &level_set_dof_handler, const VectorType &level_set) | |
MeshClassifier (const Triangulation< dim > &triangulation, const Function< dim > &level_set, const FiniteElement< dim > &element) | |
void | reclassify () |
LocationToLevelSet | location_to_level_set (const typename Triangulation< dim >::cell_iterator &cell) const |
LocationToLevelSet | location_to_level_set (const typename Triangulation< dim >::cell_iterator &cell, const unsigned int face_index) const |
template<class Archive > | |
void | serialize (Archive &ar, const unsigned int version) |
Subscriptor functionality | |
Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class. | |
void | subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const |
void | unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const |
unsigned int | n_subscriptions () const |
template<typename StreamType > | |
void | list_subscribers (StreamType &stream) const |
void | list_subscribers () const |
Static Public Member Functions | |
static ::ExceptionBase & | ExcInUse (int arg1, std::string arg2, std::string arg3) |
static ::ExceptionBase & | ExcNoSubscriber (std::string arg1, std::string arg2) |
Private Types | |
using | map_value_type = decltype(counter_map)::value_type |
using | map_iterator = decltype(counter_map)::iterator |
Private Member Functions | |
void | initialize () |
LocationToLevelSet | determine_face_location_to_levelset (const typename Triangulation< dim >::active_cell_iterator &cell, const unsigned int face_index) |
void | check_no_subscribers () const noexcept |
Private Attributes | |
const SmartPointer< const Triangulation< dim > > | triangulation |
const std::unique_ptr< internal::MeshClassifierImplementation::LevelSetDescription< dim > > | level_set_description |
std::vector< LocationToLevelSet > | cell_locations |
std::vector< LocationToLevelSet > | face_locations |
std::vector< std::array< LAPACKFullMatrix< double >, GeometryInfo< dim >::faces_per_cell > > | lagrange_to_bernstein_face |
std::atomic< unsigned int > | counter |
std::map< std::string, unsigned int > | counter_map |
std::vector< std::atomic< bool > * > | validity_pointers |
const std::type_info * | object_info |
Static Private Attributes | |
static std::mutex | mutex |
Class responsible for determining how the active cells and faces of a triangulation relate to the sign of a level set function. When calling the reclassify() function each of the active cells and faces are categorized as one of the values of LocationToLevelSet: inside, outside or intersected, depending on the sign of the level set function over the cell/face. This information is typically required in immersed/cut finite element methods, both when distributing degrees of freedom over the triangulation and when the system is assembled. The given class would then be used in the following way:
The level set function can either be described as a discrete function by a (DoFHandler, Vector)-pair or as a general Function. In the case of a discrete function, LocationToLevelSet for a given face is determined by looking at the local degrees of freedom on the face. Since the Lagrange basis functions are not positive definite, positive/negative definite dof values do not imply that the interpolated function is positive/negative definite. Thus, to classify a face this class internally transforms the local dofs to a basis spanning the same polynomial space over the face but where definite dof values imply a definite function. Currently, only the case of FE_Q-elements is implemented, where we internally change basis to FE_Bernstein. For cells, LocationToLevelSet is determined from the faces of the cell. That is, if all faces of the cell are inside/outside the LocationToLevelSet of the cell is set to inside/outside. LocationToLevelSet of the cell is set to intersected if at least one face is intersected or if its faces have different LocationToLevelSet. Note that, this procedure will incorrectly classify the cell as inside/outside, if the mesh refinement is so low that the whole zero-contour is contained in a single cell (so that none of its faces are intersected).
When the level set function is described as a Function, the level set function is locally interpolated to an FE_Q element and we proceed in the same way as for the discrete level set function.
Definition at line 108 of file mesh_classifier.h.
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privateinherited |
The data type used in counter_map.
Definition at line 229 of file subscriptor.h.
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privateinherited |
The iterator type used in counter_map.
Definition at line 234 of file subscriptor.h.
NonMatching::MeshClassifier< dim >::MeshClassifier | ( | const DoFHandler< dim > & | level_set_dof_handler, |
const VectorType & | level_set ) |
Constructor. Takes a level set function described as a DoFHandler and a Vector. The triangulation attached to DoFHandler is the one that will be classified.
Definition at line 306 of file mesh_classifier.cc.
NonMatching::MeshClassifier< dim >::MeshClassifier | ( | const Triangulation< dim > & | triangulation, |
const Function< dim > & | level_set, | ||
const FiniteElement< dim > & | element ) |
Constructor. Takes the triangulation that should be classified, a level set function described as a Function, and a scalar element that we interpolate the Function to in order to classify each cell/face.
Definition at line 336 of file mesh_classifier.cc.
void NonMatching::MeshClassifier< dim >::reclassify | ( | ) |
Perform the classification of the non artificial cells and faces in the triangulation.
Definition at line 354 of file mesh_classifier.cc.
LocationToLevelSet NonMatching::MeshClassifier< dim >::location_to_level_set | ( | const typename Triangulation< dim >::cell_iterator & | cell | ) | const |
Return how the incoming cell is located relative to the level set function.
Definition at line 442 of file mesh_classifier.cc.
LocationToLevelSet NonMatching::MeshClassifier< dim >::location_to_level_set | ( | const typename Triangulation< dim >::cell_iterator & | cell, |
const unsigned int | face_index ) const |
Return how a face of the incoming cell is located relative to the level set function.
Definition at line 457 of file mesh_classifier.cc.
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private |
For each element in the hp::FECollection returned by level_set_description, sets up the local transformation matrices.
Definition at line 474 of file mesh_classifier.cc.
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private |
Computes how the face with the given index on the incoming cell is located relative to the level set function.
Definition at line 391 of file mesh_classifier.cc.
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inherited |
Subscribes a user of the object by storing the pointer validity
. The subscriber may be identified by text supplied as identifier
.
Definition at line 135 of file subscriptor.cc.
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inherited |
Unsubscribes a user from the object.
identifier
and the validity
pointer must be the same as the one supplied to subscribe(). Definition at line 155 of file subscriptor.cc.
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inlineinherited |
Return the present number of subscriptions to this object. This allows to use this class for reference counted lifetime determination where the last one to unsubscribe also deletes the object.
Definition at line 300 of file subscriptor.h.
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inlineinherited |
List the subscribers to the input stream
.
Definition at line 317 of file subscriptor.h.
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inherited |
List the subscribers to deallog
.
Definition at line 203 of file subscriptor.cc.
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inlineinherited |
Read or write the data of this object to or from a stream for the purpose of serialization using the BOOST serialization library.
This function does not actually serialize any of the member variables of this class. The reason is that what this class stores is only who subscribes to this object, but who does so at the time of storing the contents of this object does not necessarily have anything to do with who subscribes to the object when it is restored. Consequently, we do not want to overwrite the subscribers at the time of restoring, and then there is no reason to write the subscribers out in the first place.
Definition at line 309 of file subscriptor.h.
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privatenoexceptinherited |
Check that there are no objects subscribing to this object. If this check passes then it is safe to destroy the current object. It this check fails then this function will either abort or print an error message to deallog (by using the AssertNothrow mechanism), but will not throw an exception.
Definition at line 52 of file subscriptor.cc.
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private |
Pointer to the triangulation that should be classified.
Definition at line 175 of file mesh_classifier.h.
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private |
Pointer to an object that describes what we need to know about the level set function. The underlying object will be of different type depending on whether the level set function is discrete (DoFHandler, Vector) or described by a Function.
Definition at line 185 of file mesh_classifier.h.
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private |
A vector that stores how each active cell is located relative to the level set function, based on the cells active index.
Definition at line 191 of file mesh_classifier.h.
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private |
A vector that stores how each active face is located relative to the level set function, based on the face's global index.
Definition at line 197 of file mesh_classifier.h.
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private |
For each element in the hp::FECollection returned by the LevelSetDescription, and for each local face, this vector stores a transformation matrix to a basis where positive/negative definite face dofs implies that the underlying function is positive/negative definite over the face.
Definition at line 208 of file mesh_classifier.h.
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mutableprivateinherited |
Store the number of objects which subscribed to this object. Initially, this number is zero, and upon destruction it shall be zero again (i.e. all objects which subscribed should have unsubscribed again).
The creator (and owner) of an object is counted in the map below if HE manages to supply identification.
We use the mutable
keyword in order to allow subscription to constant objects also.
This counter may be read from and written to concurrently in multithreaded code: hence we use the std::atomic
class template.
Definition at line 218 of file subscriptor.h.
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mutableprivateinherited |
In this map, we count subscriptions for each different identification string supplied to subscribe().
Definition at line 224 of file subscriptor.h.
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mutableprivateinherited |
In this vector, we store pointers to the validity bool in the SmartPointer objects that subscribe to this class.
Definition at line 240 of file subscriptor.h.
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mutableprivateinherited |
Pointer to the typeinfo object of this object, from which we can later deduce the class name. Since this information on the derived class is neither available in the destructor, nor in the constructor, we obtain it in between and store it here.
Definition at line 248 of file subscriptor.h.
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staticprivateinherited |
A mutex used to ensure data consistency when accessing the mutable
members of this class. This lock is used in the subscribe() and unsubscribe() functions, as well as in list_subscribers()
.
Definition at line 271 of file subscriptor.h.