Node Class Reference

To describe a node. More...

#include <Node.h>

Public Member Functions
	Node ()
	Default constructor.
	Node (size_t label, const Point< real_t > &x)
	Constructor with label and coordinates.
	Node (const Node &node)
	Copy Constructor.
	~Node ()
	Destructor.
void	setLabel (size_t label)
	Define label of node.
void	setNbDOF (size_t n)
	Define number of DOF.
void	setFirstDOF (size_t n)
	Define First DOF.
void	setCode (size_t dof, int code)
	Define code for a given DOF of node.
void	setCode (const vector< int > &code)
	Define codes for all node DOFs.
void	setCode (int *code)
	Define codes for all node DOFs.
void	setCode (const string &exp, int code, size_t dof=1)
	Define code by a boolean algebraic expression invoking node coordinates.
void	setCoord (size_t i, real_t x)
	Set i-th coordinate.
void	DOF (size_t i, size_t dof)
	Define label of DOF.
void	setDOF (size_t &first_dof, size_t nb_dof)
	Define number of DOF.
void	setOnBoundary ()
	Set node as boundary node.
size_t	n () const
	Return label of node.
size_t	getNbDOF () const
	Return number of degrees of freedom (DOF)
int	getCode (size_t dof=1) const
	Return code for a given DOF of node.
real_t	getCoord (size_t i) const
	Return i-th coordinate of node. i = 1..3.
Point< real_t >	getCoord () const
	Return coordinates of node.
real_t	getX () const
	Return x-coordinate of node.
real_t	getY () const
	Return y-coordinate of node.
real_t	getZ () const
	Return z-coordinate of node.
Point< real_t >	getXYZ () const
	Return coordinates of node.
size_t	getDOF (size_t i) const
	Return label of i-th dof.
size_t	getNbNeigEl () const
	Return number of neighbor elements.
Element *	getNeigEl (size_t i) const
	Return i-th neighbor element.
size_t	getFirstDOF () const
	Return label of first DOF of node.
bool	isOnBoundary () const
	Say if node is a boundary node.
void	Add (Element *el)
	Add element pointed by el as neighbor element to node.
void	setLevel (int level)
	Assign a level to current node.
int	getLevel () const
	Return node level.

Detailed Description

To describe a node.

A node is characterized by its label, its coordinates, its number of degrees of freedom (DOF) and codes that are associated to each DOF.

Remarks

Once the mesh is constructed, information on neighboring elements of node can be retrieved (see appropriate member functions). However, the member function getNodeNeighborElements of Mesh must have been called before. If this is not the case, the program crashes down since no preliminary checking is done for efficiency reasons.

Constructor & Destructor Documentation

Node() [1/2]

Node

(

)

Default constructor.

Initialize data to zero

Node() [2/2]

Node	(	size_t	label,
		const Point< real_t > &	x
	)

Constructor with label and coordinates.

Parameters

[in]	label	Label of node
[in]	x	Node coordinates

Member Function Documentation

DOF()

void DOF	(	size_t	i,
		size_t	dof
	)

Define label of DOF.

Parameters

[in]	i	DOF index
[in]	dof	Label of DOF

getCode()

int getCode

(

size_t

dof = 1

)

const

Return code for a given DOF of node.

Parameters

[in]

dof

label of degree of freedom for which code is to be returned. Default value is 1.

getCoord()

Point< real_t > getCoord

(

)

const

Return coordinates of node.

Return value is an instance of class Point

getLevel()

int getLevel

(

)

const

Return node level.

Node level decreases when element is refined (starting from 0). If the level is 0, then the element has no parents

getNbNeigEl()

size_t getNbNeigEl

(

)

const

Return number of neighbor elements.

Neighbor elements are those that share node. Note that the returned information is valid only if the Mesh member function getNodeNeighborElements() has been invoked before

getNeigEl()

Element * getNeigEl

(

size_t

i

)

const

Return i-th neighbor element.

Note that the returned information is valid only if the Mesh member function getNodeNeighborElements() has been invoked before

getXYZ()

Point< real_t > getXYZ

(

)

const

Return coordinates of node.

Return value is an instance of class Point

isOnBoundary()

bool isOnBoundary

(

)

const

Say if node is a boundary node.

Note this information is available only if boundary sides (and nodes) were determined (See class Mesh).

setCode() [1/4]

void setCode	(	const string &	exp,
		int	code,
		size_t	dof = 1
	)

Define code by a boolean algebraic expression invoking node coordinates.

Parameters

[in]	exp	Boolean algebraic expression as required by fparser
[in]	code	Code to assign to node if the algebraic expression is true
[in]	dof	Degree of Freedom for which code is assigned [Default: 1]

setCode() [2/4]

void setCode

(

const vector< int > &

code

)

Define codes for all node DOFs.

Parameters

[in]

code

vector instance that contains code for each DOF of current node

setCode() [3/4]

void setCode

(

int *

code

)

Define codes for all node DOFs.

Parameters

[in]

code

C-array that contains code for each DOF of current node

setCode() [4/4]

void setCode	(	size_t	dof,
		int	code
	)

Define code for a given DOF of node.

Parameters

[in]	dof	DOF index
[in]	code	Code to assign to DOF

setCoord()

void setCoord	(	size_t	i,
		real_t	x
	)

Set i-th coordinate.

Parameters

[in]	i	Coordinate index (1..3)
[in]	x	Coordinate value

setDOF()

void setDOF	(	size_t &	first_dof,
		size_t	nb_dof
	)

Define number of DOF.

Parameters

[in,out]	first_dof	Label of the first DOF in input that is actualized
[in]	nb_dof	Number of DOF

setLevel()

void setLevel

(

int

level

)

Assign a level to current node.

This member function is useful for mesh adaption.
Default node's level is zero

setOnBoundary()

void setOnBoundary

(

)

Set node as boundary node.

This function is mostly internally used (Especially in class Mesh)