Stores one element of a mesh. More...

#include <mesh.h>

Public Member Functions
double	get_area ()

double	get_diameter ()

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

int	get_edge_orientation (int ie) const

ElementMode2D	get_mode () const

bool	is_triangle () const

bool	is_quad () const

bool	is_curved () const

int	get_nvert () const

bool	hsplit () const

bool	vsplit () const

bool	bsplit () const

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

Protected Member Functions
int	next_vert (int i) const
	Helper functions to obtain the index of the next or previous vertex/edge.

int	prev_vert (int i) const

Element *	get_neighbor (int ie) const

void	ref_all_nodes ()
	Internal.

void	unref_all_nodes (HashTable *ht)
	Internal.

Protected Attributes
CurvMap *	cm

bool	areaCalculated
	Serves for saving the once calculated area of this element.

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

bool	diameterCalculated
	Serves for saving the once calculated diameter of this element.

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

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

Friends
class	Mesh

class	MeshReader

class	MeshReaderH2D

class	MeshReaderH1DXML

class	MeshReaderH2DXML

class	PrecalcShapeset

template<typename Scalar >
class	Space

template<typename Scalar >
class	Adapt

template<typename Scalar >
class	H1Space

template<typename Scalar >
class	HcurlSpace

template<typename Scalar >
class	HdivSpace

template<typename Scalar >
class	L2Space

template<typename Scalar >
class	KellyTypeAdapt

template<typename Scalar >
class	DiscreteProblem

template<typename Scalar >
class	Solution

template<typename Scalar >
class	NeighborSearch

template<typename Scalar >
class	Filter

template<typename Scalar >
class	MeshFunction

template<typename Scalar >
class	Global

template<typename Scalar >
class	RefinementSelectors::Selector

template<typename Scalar >
class	RefinementSelectors::POnlySelector

template<typename Scalar >
class	RefinementSelectors::HOnlySelector

template<typename Scalar >
class	RefinementSelectors::OptimumSelector

template<typename Scalar >
class	RefinementSelectors::ProjBasedSelector

template<typename Scalar >
class	RefinementSelectors::H1ProjBasedSelector

template<typename Scalar >
class	RefinementSelectors::L2ProjBasedSelector

template<typename Scalar >
class	RefinementSelectors::HcurlProjBasedSelector

class	Views::ScalarView

class	Views::Linearizer

class	RefMap

class	Traverse

class	Transformable

class	CurvMap

class	Views::Orderizer

class	Views::Vectorizer

bool	is_twin_nurbs (Element *e, int i)

int	rtb_criterion (Element *e)

CurvMap *	create_son_curv_map (Element *e, int son)

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 NULL.

Definition at line 120 of file mesh.h.

Member Function Documentation

double Hermes::Hermes2D::Element::get_area ( )

Calculates the area of the element. For curved elements, this is only an approximation: the curvature is not accounted for.

Definition at line 168 of file mesh.cpp.

Referenced by Hermes::Hermes2D::init_geom_surf(), and Hermes::Hermes2D::init_geom_vol().

double Hermes::Hermes2D::Element::get_diameter ( )

Returns the length of the longest edge for triangles, and the length of the longer diagonal for quads. Ignores element curvature.

Definition at line 215 of file mesh.cpp.

Referenced by Hermes::Hermes2D::KellyTypeAdapt< Scalar >::calc_err_internal(), Hermes::Hermes2D::init_geom_surf(), and Hermes::Hermes2D::init_geom_vol().

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

protected

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

Definition at line 157 of file mesh.cpp.

Member Data Documentation

CurvMap* Hermes::Hermes2D::Element::cm

protected

curved mapping, NULL if not curvilinear

Definition at line 164 of file mesh.h.

Referenced by Hermes::Hermes2D::Mesh::copy(), Hermes::Hermes2D::Mesh::copy_base(), Hermes::Hermes2D::Mesh::copy_converted(), Hermes::Hermes2D::Mesh::free(), Hermes::Hermes2D::MeshReaderH2D::load(), Hermes::Hermes2D::MeshReaderH2DXML::load(), Hermes::Hermes2D::Mesh::refine_quad(), Hermes::Hermes2D::Mesh::rescale(), Hermes::Hermes2D::MeshReaderH2DXML::save(), Hermes::Hermes2D::RefMap::set_active_element(), and Hermes::Hermes2D::RefMap::untransform().

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

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Friends

Detailed Description

Member Function Documentation

Member Data Documentation