Stores one element of a mesh. More...

#include <element.h>

Public Member Functions
void	calc_area (bool precise_for_curvature=false)
	This takes much longer. More...

void	calc_diameter ()
	Calculates the diameter.

void	get_center (double &x, double &y)
	Returns the center of gravity.

bool	get_edge_orientation (int ie) const

ElementMode2D	get_mode () const

bool	is_triangle () const

bool	is_quad () const

bool	is_curved () const

unsigned char	get_nvert () const

bool	is_parallelogram () const

bool	has_const_ref_map () const

bool	hsplit () const

bool	vsplit () const

bool	bsplit () const

unsigned char	next_vert (unsigned char i) const
	Helper functions to obtain the index of the next or previous vertex/edge.

unsigned char	prev_vert (unsigned char i) const

Element *	get_neighbor (int ie) const

void	ref_all_nodes ()
	Internal.

void	unref_all_nodes (HashTable *ht)
	Internal.

Public Attributes
int	id
	element id number

bool	active
	0 = active, no sons; 1 = inactive (refined), has sons

bool	used
	array item usage flag

Element *	parent
	pointer to the parent element for the current son

bool	visited
	true if the element has been visited during assembling

Node *	vn [H2D_MAX_NUMBER_VERTICES]
	vertex node pointers

union {
Node * en [H2D_MAX_NUMBER_EDGES]
	edge node pointers

Element * sons [H2D_MAX_ELEMENT_SONS]
	son elements (up to four)

};

int	marker
	element marker

CurvMap *	cm
	curved mapping, nullptr if not curvilinear

double	area
	Serves for saving the once calculated area of this element.

bool	center_set

double	x_center

double	y_center

double	diameter
	Serves for saving the once calculated diameter of this element.

unsigned short	iro_cache
	Increase in integration order, see RefMap::calc_inv_ref_order()

unsigned char	nvert
	number of vertices (3 or 4)

Detailed Description

Stores one element of a mesh.

The element can be a triangle or a quad (nvert == 3 or nvert = 4), active or inactive.

Vertex/node index number [2] (3)----—(2) | | [3]| quad. |[1] | | (0)----—(1) [0] Active elements are actual existing elements in the mesh, which take part in the computation. Inactive elements are those which have once been active, but were refined, ie., replaced by several other (smaller) son elements. The purpose of the union is the following. Active elements store pointers to their vertex and edge nodes. Inactive elements store pointers to thier son elements and to vertex nodes.

If an element has curved edges, the member 'cm' points to an associated CurvMap structure, otherwise it is nullptr.

Definition at line 107 of file element.h.

Member Function Documentation

void Hermes::Hermes2D::Element::calc_area ( bool precise_for_curvature = false )

This takes much longer.

Calculates the area of the element.

Parameters

[in] precise_for_curvature If curved elements should be evaluated exactly. \

Definition at line 128 of file element.cpp.

Referenced by ref_all_nodes(), and unref_all_nodes().

Element * Hermes::Hermes2D::Element::get_neighbor ( int ie ) const

Returns a pointer to the neighboring element across the edge 'ie', or nullptr if it does not exist or is across an irregular edge.

Definition at line 117 of file element.cpp.

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

Public Member Functions

Public Attributes

Detailed Description

Member Function Documentation