concepts::Hexahedron Class Reference

#include <topology3D.hh>

Inheritance diagram for concepts::Hexahedron:

Public Member Functions
	Hexahedron (Quad &quad0, Quad &quad1, Quad &quad2, Quad &quad3, Quad &quad4, Quad &quad5, const Attribute attrib=Attribute())
virtual Hexahedron *	child (uint i, bool mode=0)
virtual const Hexahedron *	child (uint i) const
Edge *	edge (uint i) const
Quad *	face (uint i) const
Vertex *	vertex (uint i) const
Z2	rho (int i) const
Z4	tau (int i) const
void	setStrategy (const HexSubdivision *strategy=0)
const HexSubdivision *	getStrategy () const
int	operator== (const Connector &cntr) const
	Comparison operator.
const Key &	key () const
	Returns the key of the connector.
const Attribute &	attrib () const
	Returns the attribute of the connector.
void	setAttrib (uint attrb)
int	related (const Connector &conn) const

Protected Member Functions
virtual std::ostream &	info (std::ostream &os) const
	Returns information in an output stream.

Protected Attributes
Key	key_
	Unique key of the connector.
Attribute	attrib_
	Attribute.

Static Protected Attributes
static uint	cnt_

Friends
class	HexSubdiv8
class	HexSubdiv2x
class	HexSubdiv2y
class	HexSubdiv2z
class	HexSubdiv4x
class	HexSubdiv4y
class	HexSubdiv4z

Detailed Description

A hexahedron in the topology. Implements the abstract methods from the parent classes to query the children, the vertices, the edges and faces of the hexahedron.

Every face can have two different orientations in the hexahedron (this is stored in the array rho_ – similar to the orientation of an edge in a triangle or quadrilateral, see Triangle or Quad) and it can have four possible rotations (enumerating the vertices).

See also

Triangle

Quad

Author

Philipp Frauenfelder, 2000

Examples

meshes.cc.

Definition at line 134 of file topology3D.hh.

Constructor & Destructor Documentation

Hexahedron()

concepts::Hexahedron::Hexahedron	(	Quad &	quad0,
		Quad &	quad1,
		Quad &	quad2,
		Quad &	quad3,
		Quad &	quad4,
		Quad &	quad5,
		const Attribute	attrib = Attribute()
	)

Constructor. Creates a hexahedron out of six quadrilaterals. The faces must form a hexahedron.

The first quadrilateral is thought to be the floor of the hexahedron and its normal orientation is right screwed into the hexahedron. The normal orientation of the four walls is right screwed out of the hexahedron. The normal orientation of the last quadrilateral (the ceiling) is right screwed into the hexahedron.

The walls of the hexahedron (quadrilaterals 1 to 4) must be given in the proper order: they must follow the normal orientation of the floor.

Parameters

quad0	Floor of the hexahedron
quad1..quad4	Walls of the hexahedron
quad5	Ceiling of the hexahedron
attrib	Attribute of the hexahedron

Member Function Documentation

attrib()

const Attribute & concepts::Connector::attrib ( ) const

inlineinherited

Returns the attribute of the connector.

Definition at line 108 of file connector.hh.

child() [1/2]

virtual const Hexahedron * concepts::Hexahedron::child ( uint  i ) const

virtual

Implements concepts::Connector3.

child() [2/2]

virtual Hexahedron * concepts::Hexahedron::child ( uint  i, bool  mode = 0  )

virtual

Returns a child.

If children are created, all faces of the hexahedron are refined and one new edge is introduced. This gives one new hexahedron per vertex and one per face.

Parameters

i	Index of the child to be returned.
mode	mode = 1: No children are created mode = 0: If no childs exist, eight new children are created.

Implements concepts::Connector3.

edge()

Edge * concepts::Hexahedron::edge ( uint  i ) const

virtual

Returns a 1D component: edge. A 3D element consists of 2D, 1D and 0D elements, the edges can be queried here.

Parameters

i	Index of the edge

Implements concepts::Connector3.

face()

Quad * concepts::Hexahedron::face ( uint  i ) const

inlinevirtual

Returns a 2D component: face. A 3D element consists of 2D, 1D and 0D elements, the faces can be queried here.

Parameters

i	Index of the face

Implements concepts::Connector3.

Definition at line 182 of file topology3D.hh.

getStrategy()

const HexSubdivision * concepts::Hexahedron::getStrategy ( ) const

inline

Returns the subdivision strategy of this quad.

If you want to find check against another strategy use

quad.getStrategy() == QuadSubdiv2V::instance()

Definition at line 215 of file topology3D.hh.

info()

virtual std::ostream & concepts::Hexahedron::info ( std::ostream &  os ) const

protectedvirtual

Returns information in an output stream.

Reimplemented from concepts::Connector.

key()

const Key & concepts::Connector::key ( ) const

inlineinherited

Returns the key of the connector.

Definition at line 105 of file connector.hh.

operator==()

int concepts::Connector::operator== ( const Connector &  cntr ) const

inlineinherited

Comparison operator.

Definition at line 102 of file connector.hh.

related()

int concepts::Connector::related ( const Connector &  conn ) const

inherited

Checks if this connector is related to conn. It is being checked if one of the two is an ancestor of the other.

Parameters

conn	Other connector

Returns

An integer i.
i=0 if there is no relationship or the connectors are identical
i>0 if conn is an ancestor of this connector
i<0 if conn is a descendant of this connector
|i| gives the number of generations between the connectors

rho()

Z2 concepts::Hexahedron::rho ( int  i ) const

inline

Returns the orientation of a face. See the description of rho_.

Parameters

i	Index of the face

Definition at line 188 of file topology3D.hh.

setAttrib()

void concepts::Connector::setAttrib ( uint  attrb )

inlineinherited

Definition at line 111 of file connector.hh.

setStrategy()

void concepts::Hexahedron::setStrategy

(

const HexSubdivision *

strategy = 0

)

Sets the subdivision strategy of this hexahedron.

If the parameter is set to 0 (or if the method is called without parameter) the strategy is set to the default (if not already set). The default subdivision strategy is subdivision into 8 children.

  @param strategy Pointer to an instance of a subdivision strategy.

Exceptions

StrategyChange

if the change is not allowed (the change is not allowed if there are children present)

tau()

Z4 concepts::Hexahedron::tau ( int  i ) const

inline

Returns the rotation of a face. See the description of tau_.

Parameters

i	Index of the face

Definition at line 193 of file topology3D.hh.

vertex()

Vertex * concepts::Hexahedron::vertex ( uint  i ) const

virtual

Returns a 0D component: vertex A 3D element consists of 2D, 1D and 0D elements, the vertices can be queried here.

Parameters

i	Index of the vertex

Implements concepts::Connector3.

Friends And Related Symbol Documentation

HexSubdiv2x

friend class HexSubdiv2x

friend

Definition at line 136 of file topology3D.hh.

HexSubdiv2y

friend class HexSubdiv2y

friend

Definition at line 137 of file topology3D.hh.

HexSubdiv2z

friend class HexSubdiv2z

friend

Definition at line 138 of file topology3D.hh.

HexSubdiv4x

friend class HexSubdiv4x

friend

Definition at line 139 of file topology3D.hh.

HexSubdiv4y

friend class HexSubdiv4y

friend

Definition at line 140 of file topology3D.hh.

HexSubdiv4z

friend class HexSubdiv4z

friend

Definition at line 141 of file topology3D.hh.

HexSubdiv8

friend class HexSubdiv8

friend

Definition at line 135 of file topology3D.hh.

Member Data Documentation

attrib_

Attribute concepts::Connector::attrib_

protectedinherited

Attribute.

Definition at line 132 of file connector.hh.

cnt_

uint concepts::Connector3::cnt_

staticprotectedinherited

Counter for the connectors. This counter is used to create the unique key of the connector.

Definition at line 322 of file connector.hh.

key_

Key concepts::Connector::key_

protectedinherited

Unique key of the connector.

Definition at line 129 of file connector.hh.

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

• geometry/topology3D.hh