concepts::HexSubdiv4x Class Reference

#include <hexsubdiv.hh>

Inheritance diagram for concepts::HexSubdiv4x:

Public Member Functions
virtual void	createChildren (Hexahedron &q) const
virtual void	removeChildren (Hexahedron &q) const

Static Public Member Functions
static const HexSubdiv4x *	instance ()

Protected Member Functions
virtual std::ostream &	info (std::ostream &os) const
	Returns information in an output stream.
void	subFace0011 (Quad &q, Z2 rho, Z4 tau, Quad *&A, Quad *&B) const
void	subFace1100 (Quad &q, Z2 rho, Z4 tau, Quad *&A, Quad *&B) const
void	subFace0110 (Quad &q, Z2 rho, Z4 tau, Quad *&A, Quad *&B) const
void	subFace1001 (Quad &q, Z2 rho, Z4 tau, Quad *&A, Quad *&B) const
void	subFace0123 (Quad &q, Z2 rho, Z4 tau, Quad *&A, Quad *&B, Quad *&C, Quad *&D) const
void	subFace1230 (Quad &q, Z2 rho, Z4 tau, Quad *&A, Quad *&B, Quad *&C, Quad *&D) const
void	subFace2301 (Quad &q, Z2 rho, Z4 tau, Quad *&A, Quad *&B, Quad *&C, Quad *&D) const
bool	faceSubdiv4 (Quad &q) const
Quad *	findFace (const Vertex *const v, Quad *const q[4], const unsigned int tau, const unsigned int rho, const unsigned int vtxIdx) const
void	subdivFace0 (Hexahedron &h, Quad *&A, Quad *&B, Quad *&C, Quad *&D, bool normal) const
void	subdivFace1 (Hexahedron &h, Quad *&A, Quad *&B, Quad *&C, Quad *&D, bool normal) const
void	subdivFace2 (Hexahedron &h, Quad *&A, Quad *&B, Quad *&C, Quad *&D, bool normal) const
void	subdivFace3 (Hexahedron &h, Quad *&A, Quad *&B, Quad *&C, Quad *&D, bool normal) const
void	subdivFace4 (Hexahedron &h, Quad *&A, Quad *&B, Quad *&C, Quad *&D, bool normal) const
void	subdivFace5 (Hexahedron &h, Quad *&A, Quad *&B, Quad *&C, Quad *&D, bool normal) const

Detailed Description

Subdivision strategy for hexahedrons which generates 4 children along the x direction.

The children are generated by subdividing the respective faces into 2 or 4 quadrilaterals and introducing one new edge and 4 new faces.

Author

Philipp Frauenfelder, 2002

Definition at line 255 of file hexsubdiv.hh.

Member Function Documentation

createChildren()

virtual void concepts::HexSubdiv4x::createChildren ( Hexahedron &  q ) const

virtual

If no children of q exist, they are created.

Implements concepts::HexSubdivision.

faceSubdiv4()

bool concepts::HexSubdivision::faceSubdiv4 ( Quad &  q ) const

protectedinherited

Takes a face and tries to subdivide it into 4 (by setting the strategy to QuadSubdiv4). Firstly, a normal subdivision in one shot into 4 children is tried. If this fails (by catching a StrategyChange exception), then a previous subdivision into 2 children was executed on this face. The orthogonal subdivision into 2 children is then reserved (by setting the strategy accordingly) on the two children of the face. This can be called a subdivision into 4 children in two shots.

Parameters

q	Face to be subdivided into 4

Returns

true if the subdivision in one shot succeeded, false otherwise

Exceptions

StrategyChange

if the subdivision in two shots fails too

findFace()

Quad * concepts::HexSubdivision::findFace ( const Vertex *const  v, Quad *const  q[4], const unsigned int  tau, const unsigned int  rho, const unsigned int  vtxIdx  ) const

protectedinherited

Looks for the quad in q which contains the vertex v. This is done by a loop over the four entries of q and checking the indicated vertex (given by the index location vtxIdx).

Parameters

v	Vertex to look for
q	List of quads to search through
tau	Orientation flags of the quads
rho	Rotation flags of the quads
vtxIdx	Index location of the vertex in the quads counted from vertex 0 in the quad in rho = 0 direction

Returns

the matching quad

info()

virtual std::ostream & concepts::HexSubdiv4x::info ( std::ostream &  os ) const

protectedvirtual

Returns information in an output stream.

Reimplemented from concepts::OutputOperator.

removeChildren()

virtual void concepts::HexSubdiv4x::removeChildren ( Hexahedron &  q ) const

virtual

If there are children, they are removed. The additional faces, edges and vertices are removed as well.

Implements concepts::HexSubdivision.

subdivFace0()

void concepts::HexSubdivision::subdivFace0 ( Hexahedron &  h, Quad *&  A, Quad *&  B, Quad *&  C, Quad *&  D, bool  normal  ) const

protectedinherited

Subdivides a face of a hexehedron h into 4 children. normal is taken into account: true means that the face is to be subdivided in one shot, false means two shots.

Parameters

h	Hexahedron of which the face has to be subdivided
A	Result
B	Result
C	Result
D	Result
normal	one or two shots

subFace0011()

void concepts::HexSubdivision::subFace0011 ( Quad &  q, Z2  rho, Z4  tau, Quad *&  A, Quad *&  B  ) const

protectedinherited

Gets the two children of q and sorts them. The sorting rule is given in the name and parametrized by the orientation flags rho and tau.

The code 0011 means the following:

rho \ tau	0	1	2	3
0	0	0	1	1
1	1	1	0	0

The indices 0 and 1 denote the index in the call to Quad::child which has to be used to get the correct face back.

Returns

A and B

subFace0123()

void concepts::HexSubdivision::subFace0123 ( Quad &  q, Z2  rho, Z4  tau, Quad *&  A, Quad *&  B, Quad *&  C, Quad *&  D  ) const

protectedinherited

Gets the four children of q and sorts them. The sorting rule is given in the name and and parametrized by the orientation flags rho and tau.

The code 0123 means the following:

rho \ tau	0	1	2	3
0	0	1	2	3
1	1	2	3	0

The indices 0, 1, 2 and 3 denote the index in the call to Quad::child which has to be used to get the correct face back.

Returns

A, B, C and D

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

• geometry/hexsubdiv.hh