facet Class Reference

#include <gfan.h>

Public Member Functions
	facet ()
	The default constructor.
	facet (const int &n)
	Constructor for lower dimensional faces.
	facet (const facet &f)
	The copy constructor.
facet *	shallowCopy (const facet &f)
	A shallow copy of facets.
void	shallowDelete ()
	~facet ()
	The default destructor.
void	setFacetNormal (int64vec *iv)
	Comparison operator.
int64vec *	getFacetNormal () const
	Returns the facet normal.
const int64vec *	getRef2FacetNormal () const
	Return a reference to the facet normal.
void	printNormal () const
	Method to print the facet normal.
void	setFlipGB (ideal I)
	Store the flipped GB.
ideal	getFlipGB ()
	Return the flipped GB.
void	printFlipGB ()
	Print the flipped GB.
void	setUCN (int n)
	Set the UCN.
int	getUCN ()
	Get the UCN Returns the UCN iff this != NULL, else -1.
void	setInteriorPoint (int64vec *iv)
	Store an interior point of the facet.
int64vec *	getInteriorPoint ()
const int64vec *	getRef2InteriorPoint ()
volatile void	fDebugPrint ()
	Debugging function prints the facet normal an all (codim-2)-facets that belong to it.

Data Fields
bool	isFlippable
	Boolean value to indicate whether a facet is flippable or not This is also used to mark facets that nominally are flippable but which do not intersect with the positive orthant.
facet *	next
facet *	prev
facet *	codim2Ptr
int	numCodim2Facets
unsigned	numRays
ring	flipRing

Private Attributes
int64vec *	fNormal
	Inner normal of the facet, describing it uniquely up to isomorphism.
int64vec *	interiorPoint
	An interior point of the facet.
int	UCN
	Universal Cone Number The number of the cone the facet belongs to, Set in getConeNormals().
short	codim
	The codim of the facet.
ideal	flipGB
	The Groebner basis on the other side of a shared facet.

Friends
class	gcone

Detailed Description

Definition at line 45 of file gfan.h.

Constructor & Destructor Documentation

facet() [1/3]

facet::facet

(

)

The default constructor.

facet() [2/3]

facet::facet

(

const int &

n

)

Constructor for lower dimensional faces.

facet() [3/3]

facet::facet

(

const facet &

f

)

The copy constructor.

~facet()

facet::~facet

(

)

The default destructor.

Member Function Documentation

fDebugPrint()

volatile void facet::fDebugPrint

(

)

Debugging function prints the facet normal an all (codim-2)-facets that belong to it.

getFacetNormal()

int64vec * facet::getFacetNormal ( ) const

inline

Returns the facet normal.

getFlipGB()

ideal facet::getFlipGB ( )

inline

Return the flipped GB.

getInteriorPoint()

int64vec * facet::getInteriorPoint ( )

inline

getRef2FacetNormal()

const int64vec * facet::getRef2FacetNormal ( ) const

inline

Return a reference to the facet normal.

getRef2InteriorPoint()

const int64vec * facet::getRef2InteriorPoint ( )

inline

getUCN()

int facet::getUCN ( )

inline

Get the UCN Returns the UCN iff this != NULL, else -1.

printFlipGB()

void facet::printFlipGB ( )

inline

Print the flipped GB.

printNormal()

void facet::printNormal ( ) const

inline

Method to print the facet normal.

setFacetNormal()

void facet::setFacetNormal ( int64vec * iv )

inline

Comparison operator.

Comparison of facets Stores the facet normal

Parameters

int64vec

setFlipGB()

void facet::setFlipGB ( ideal I )

inline

Store the flipped GB.

setInteriorPoint()

void facet::setInteriorPoint ( int64vec * iv )

inline

Store an interior point of the facet.

setUCN()

void facet::setUCN ( int n )

inline

Set the UCN.

shallowCopy()

facet * facet::shallowCopy

(

const facet &

f

)

A shallow copy of facets.

shallowDelete()

void facet::shallowDelete

(

)

Friends And Related Symbol Documentation

gcone

friend class gcone

friend

Definition at line 130 of file gfan.h.

Field Documentation

codim

short facet::codim

private

The codim of the facet.

Definition at line 61 of file gfan.h.

codim2Ptr

facet* facet::codim2Ptr

Definition at line 81 of file gfan.h.

flipGB

ideal facet::flipGB

private

The Groebner basis on the other side of a shared facet.

In order not to have to compute the flipped GB twice we store the basis we already get when identifying search facets. Thus in the next step of the reverse search we can just copy the old cone and update the facet and the gcBasis. facet::flibGB is set via facet::setFlipGB() and printed via facet::printFlipGB

Definition at line 70 of file gfan.h.

flipRing

ring facet::flipRing

Definition at line 84 of file gfan.h.

fNormal

int64vec* facet::fNormal

private

Inner normal of the facet, describing it uniquely up to isomorphism.

Definition at line 49 of file gfan.h.

interiorPoint

int64vec* facet::interiorPoint

private

An interior point of the facet.

Definition at line 52 of file gfan.h.

isFlippable

bool facet::isFlippable

Boolean value to indicate whether a facet is flippable or not This is also used to mark facets that nominally are flippable but which do not intersect with the positive orthant.

This check is done in gcone::getCodim2Normals

Definition at line 77 of file gfan.h.

next

facet* facet::next

Definition at line 79 of file gfan.h.

numCodim2Facets

int facet::numCodim2Facets

Definition at line 82 of file gfan.h.

numRays

unsigned facet::numRays

Definition at line 83 of file gfan.h.

prev

facet* facet::prev

Definition at line 80 of file gfan.h.

UCN

int facet::UCN

private

Universal Cone Number The number of the cone the facet belongs to, Set in getConeNormals().

Definition at line 57 of file gfan.h.

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

• Singular/dyn_modules/gfanlib/gfan.h