DuplicateNodes Class Reference

#include <duplicate_nodes.h>

Collaboration diagram for DuplicateNodes:

Public Member Functions
	DuplicateNodes (Mesh *mesh)
Mesh *	mesh () const
unsigned int	n_nodes () const
const std::vector< unsigned int > &	node_dim () const
const std::vector< MeshObject > &	objects (unsigned int dim) const
const std::vector< unsigned int > &	obj_4_el () const
const std::vector< unsigned int > &	obj_4_edg () const

Private Member Functions
void	init_nodes ()
	Initialize the vector of nodes from mesh. More...
void	init_from_edges ()
	Initialize objects from mesh edges. More...
void	init_from_elements ()
	Initialize objects from mesh elements. More...
void	duplicate_nodes ()
	Duplicate nodes that are lying on interfaces with fractures. More...

Private Attributes
Mesh *	mesh_
	The mesh object. More...
unsigned int	n_duplicated_nodes_
	Number of nodes (including duplicated ones). More...
std::vector< unsigned int >	node_dim_
	Vector of space dimensions of elements using the particular duplicated node. More...
std::vector< MeshObject >	objects_ [4]
	Array of n-faces by their dimension. More...
std::vector< unsigned int >	obj_4_el_
std::vector< unsigned int >	obj_4_edg_
	Vector of object indices for each mesh edge. More...

Detailed Description

Class DuplicateNodes constructs the graph structure of elements, their faces and nodes without any other data such as coordinates or region numbers. The nodes are then duplicated where the elements are separated by fractures (elements of lower dim.). E.g.:

Consider a domain containing fracture like this: +--—+--—+ | | |

+

+--------—+

with the mesh nodes numbered as follows: 0--—1--—2 | | |

3

4--------—5

The class duplicates node 1 and node 3 because in these nodes FE functions can be discontinuous (schematic view): 0-6 1 7-2 | \ | / | | \ 3 / | | \ / | | 8 | | | 4--------—5

Now, nodes 1,6,7 have the same coordinates but belong to different groups of elements and analogously nodes 3 and 8.

The structure is used in DOF handler to distribute dofs for FE spaces sharing dofs between elements.

TODO: Currently we do not create faces of faces, i.e. 1d edges of tetrahedra are not available. This should be implemented if we need to distribute dofs on edges.

Definition at line 96 of file duplicate_nodes.h.

Constructor & Destructor Documentation

DuplicateNodes::DuplicateNodes

(

Mesh *

mesh

)

Definition at line 40 of file duplicate_nodes.cc.

Member Function Documentation

void DuplicateNodes::duplicate_nodes ( )

private

Duplicate nodes that are lying on interfaces with fractures.

The main functionality of the class creates duplicate nodes at interfaces with fractures.

For each node: 1) Create the lists of elements (node_elements) sharing the node. 2) Divide node_elements into groups (components) connected by edges. 3) If more than one component was created, create for each extra component a new node and update its index in the elements from this component. Also set node_dim_ (dimension of elements using the node).

Definition at line 101 of file duplicate_nodes.cc.

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void DuplicateNodes::init_from_edges ( )

private

Initialize objects from mesh edges.

Definition at line 61 of file duplicate_nodes.cc.

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void DuplicateNodes::init_from_elements ( )

private

Initialize objects from mesh elements.

Definition at line 75 of file duplicate_nodes.cc.

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void DuplicateNodes::init_nodes ( )

private

Initialize the vector of nodes from mesh.

Definition at line 52 of file duplicate_nodes.cc.

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Mesh* DuplicateNodes::mesh ( ) const

inline

Definition at line 102 of file duplicate_nodes.h.

unsigned int DuplicateNodes::n_nodes ( ) const

inline

Definition at line 104 of file duplicate_nodes.h.

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const std::vector<unsigned int>& DuplicateNodes::node_dim ( ) const

inline

Definition at line 105 of file duplicate_nodes.h.

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const std::vector<unsigned int>& DuplicateNodes::obj_4_edg ( ) const

inline

Definition at line 111 of file duplicate_nodes.h.

const std::vector<unsigned int>& DuplicateNodes::obj_4_el ( ) const

inline

Definition at line 110 of file duplicate_nodes.h.

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const std::vector<MeshObject>& DuplicateNodes::objects ( unsigned int  dim ) const

inline

Definition at line 107 of file duplicate_nodes.h.

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Member Data Documentation

Mesh* DuplicateNodes::mesh_

private

The mesh object.

Definition at line 130 of file duplicate_nodes.h.

unsigned int DuplicateNodes::n_duplicated_nodes_

private

Number of nodes (including duplicated ones).

Definition at line 133 of file duplicate_nodes.h.

std::vector<unsigned int> DuplicateNodes::node_dim_

private

Vector of space dimensions of elements using the particular duplicated node.

Definition at line 136 of file duplicate_nodes.h.

std::vector<unsigned int> DuplicateNodes::obj_4_edg_

private

Vector of object indices for each mesh edge.

Definition at line 148 of file duplicate_nodes.h.

std::vector<unsigned int> DuplicateNodes::obj_4_el_

private

Vector of object indices for each mesh element. For an element with index el_idx, obj_4_el_[el_idx] is the index of the corresponding object in the vector tetras_/triangles_/lines_/points_, depending on the element dimension.

Definition at line 145 of file duplicate_nodes.h.

std::vector<MeshObject> DuplicateNodes::objects_[4]

private

Array of n-faces by their dimension.

Definition at line 139 of file duplicate_nodes.h.

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

• /opt/flow123d/flow123d/src/mesh/duplicate_nodes.h
• /opt/flow123d/flow123d/src/mesh/duplicate_nodes.cc