Element Class Reference
[Finite Element Mesh]

#include <Element.h>

Detailed Description

To store and treat finite element geometric information.

Class Element enables defining an element of a finite element mesh. The element is given in particular by its shape and a list of nodes. Each node can be accessed by the member function getPtrNode. Moreover, class Mesh can generate for each element its list of sides. The string that defines the element shape must be chosen according to the following list :

Shape	Shape Name	Dimension	Min. Number of nodes
Line	line	2	2
Triangle	tria	2	3
Quadrilateral	quad	2	4
Tetrahedron	tetra	3	4
Hexahedron	hexa	3	8


Public Member Functions
void	Add (Element *el)
	Add a neighbor element.
void	Add (Side *sd)
	Assign Side to Element.
void	Add (Node *node, int n)
	Insert a node and set its local node number.
void	Add (Node *node)
	Insert a node at end of list of nodes of element.
int	Contains (const Side *s) const
	Say if element contains given side.
int	Contains (const Node *n) const
	Say if element contains given node.
	Element (const Element &el)
	Copy constructor.
	Element (size_t label, int shape, int c)
	Constructor initializing label, shape and code of element.
	Element (size_t label, const string &shape, int c)
	Constructor initializing label, shape and code of element.
	Element (size_t label, int shape)
	Constructor initializing label, shape of element.
	Element (size_t label, const string &shape)
	Constructor initializing label, shape of element.
	Element ()
	Default constructor.
int	getCode () const
	Return code of element.
size_t	getDOF () const
	Return element DOF label.
size_t	getLabel () const
	Return label of element.
Material *	getMaterial () const
	Return pointer to Material instance.
double	getMeasure () const
	Return measure of element.
size_t	getNbDOF () const
	return element nb of d.DOF (fixed at 1)
size_t	getNbEq () const
	Return number of element equations.
size_t	getNbNeigElements () const
	Return number of neigboring elements.
size_t	getNbNodes () const
	Return number of element nodes.
size_t	getNbSides () const
	Return number of element sides (Constant version).
size_t	getNbVertices () const
	Return number of element vertices.
Element *	getNeighborElement (size_t i) const
	Return pointer to element Neighboring element.
size_t	getNodeLabel (size_t n) const
	Return global label of node of local label i.
Node *	getPtrNode (size_t i) const
	Return pointer to node of label i (Local labelling).
Side *	getPtrSide (size_t i) const
	Return pointer to side of label i (Local labelling).
int	getShape () const
	Return element shape.
size_t	getSideLabel (size_t n) const
	Return global label of side of local label i.
Point< double >	getUnitNormal (size_t i) const
	Return outward unit normal to i-th side of element.
bool	isOnBoundary () const
	Says if current element is a boundary element or not.
Node *	operator() (size_t i)
	Operator () : Return pointer to node of local label i.
void	Replace (size_t label, Side *side)
	Replace a side at a given local label.
void	Replace (size_t label, Node *node)
	Replace a node at a given local label.
void	setCode (size_t dof, int code)
	Assign code to a DOF.
void	setCode (int c)
	Define code of element.
void	setDOF (size_t i, size_t dof)
	Define label of DOF.
void	setLabel (size_t i)
	Define label of element.
void	setMaterial (Material &m)
	Assign material name to element.
void	setNode (size_t i, Node *node)
	Assign a node given by its pointer as the i-th node of element.
int	setSide (size_t n, size_t *nd, int shape)
	Initialize information about element sides.
	~Element ()
	Destructor.

Constructor & Destructor Documentation

Element	(	size_t	label,
		const string &	shape
	)

Constructor initializing label, shape of element.

Parameters:

`[in]`	label	Label to assign to element.
`[in]`	shape	Shape of element (See class description).

Element	(	size_t	label,
		int	shape
	)

Constructor initializing label, shape of element.

Parameters:

`[in]`	label	Label to assign to element.
`[in]`	shape	Shape of element (See enum ElementShape in Mesh).

Element	(	size_t	label,
		const string &	shape,
		int	c
	)

Constructor initializing label, shape and code of element.

Parameters:

`[in]`	label	Label to assign to element.
`[in]`	shape	Shape of element (See class description).
`[in]`	c	Code tpo assign to element (useful for media properties).

Element	(	size_t	label,
		int	shape,
		int	c
	)

Constructor initializing label, shape and code of element.

Parameters:

`[in]`	label	Label to assign to element.
`[in]`	shape	Shape of element (See enum ElementShape in Mesh).
`[in]`	c	Code tpo assign to element (useful for media properties).

Member Function Documentation

void Add ( Element * el )

Add a neighbor element.

Parameters:

[in] el Pointer to Element instance

void Add ( Side * sd )

Assign Side to Element.

Parameters:

[in] sd Pointer to Side instance.

void Add	(	Node *	node,
		int	n
	)

Insert a node and set its local node number.

Parameters:

	node	[in] Pointer to Node instance
`[in]`	n	Element node number to assign

void Add ( Node * node )

Insert a node at end of list of nodes of element.

Parameters:

[in] node Pointer to Node instance.

int Contains ( const Side * s ) const

Say if element contains given side.

Parameters:

[in] s Pointer to Side instance.

int Contains ( const Node * n ) const

Say if element contains given node.

Parameters:

n

[in] Pointer to Node instance.

double getMeasure ( ) const

Return measure of element.

This member function returns length, area or volume of element. In case of quadrilaterals and hexahedrals it returns determinant of Jacobian of mapping between reference and actual element

size_t getNbNeigElements ( ) const

Return number of neigboring elements.

Note:: This method returns valid information only if the Mesh member function Mesh::getElementNeighborElements() has been called before.

Element* getNeighborElement ( size_t i ) const

Return pointer to element Neighboring element.

Parameters:

[in] i Index of element to look for.

Note:: This method returns valid information only if the Mesh member function Mesh::getElementNeighborElements() has been called before.

Point<double> getUnitNormal ( size_t i ) const

Return outward unit normal to i-th side of element.

Sides are ordered [node_1,node_2], [node_2,node_3], ...

bool isOnBoundary ( ) const

Says if current element is a boundary element or not.

Note:: this information is available only if boundary elements were determined i.e., if Member function Mesh::getBoundarySides or Mesh::getAllSides has been invoked before.

void Replace	(	size_t	label,
		Side *	side
	)

Replace a side at a given local label.

Parameters:

`[in]`	label	Side to replace.
`[in]`	side	Pointer to Side instance to copy to current instance.

void Replace	(	size_t	label,
		Node *	node
	)

Replace a node at a given local label.

Parameters:

`[in]`	label	Node to replace.
`[in]`	node	Pointer to Node instance to copy to current instance.

void setCode	(	size_t	dof,
		int	code
	)

Assign code to a DOF.

Parameters:

`[in]`	dof	Index of dof for assignment.
`[in]`	code	Code to assign.

void setCode ( int c )

Define code of element.

Parameters:

[in] c Code to assign to element.

void setDOF	(	size_t	i,
		size_t	dof
	)

Define label of DOF.

Parameters:

`[in]`	i	Index of DOF.
`[in]`	dof	Label of DOF to assign.

void setLabel ( size_t i )

Define label of element.

Parameters:

[in] i Label to assign to element

void setMaterial ( Material & m )

Assign material name to element.

Parameters:

[in] m Pointer to Material instance.

int setSide	(	size_t	n,
		size_t *	nd,
		int	shape
	)

Initialize information about element sides.

This function is to be used to initialize loops over sides.

Parameters:

`[in]`	n	Label of element.
`[in]`	nd	List
`[in]`	shape	Shape of side (See Side class description).

Element Class Reference [Finite Element Mesh]

Detailed Description

Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation

Element Class Reference
[Finite Element Mesh]