GEOM_FADE2D::Edge2 Class Reference

Edge2 is a directed edge. More...

#include <Edge2.h>

Public Member Functions
	Edge2 (const Edge2 &e_)
	Edge2 (Triangle2 *pT, int oppIdx_)
	Constructor. More...
int	getIndex () const
double	getLength2D () const
void	getPoints (Point2 *&p1, Point2 *&p2) const
	Get the endpoints. More...
Point2 *	getSrc () const
	Get the source point. More...
Point2 *	getTrg () const
	Get the target point. More...
Triangle2 *	getTriangle () const
void	getTriangles (Triangle2 *&pT0, Triangle2 *&pT1, int &idx0, int &idx1) const
bool	operator!= (const Edge2 &e) const
	operator!=() More...
bool	operator< (const Edge2 &e) const
	operator<() More...
Edge2 &	operator= (const Edge2 &other)
bool	operator== (const Edge2 &e) const
	operator==() More...

Protected Attributes
int	oppIdx
Triangle2 *	pT

Friends
std::ostream &	operator<< (std::ostream &stream, const Edge2 &e)

Detailed Description

Edge2 is a directed edge.

Constructor & Destructor Documentation

Edge2()

GEOM_FADE2D::Edge2::Edge2	(	Triangle2 *	pT,
		int	oppIdx_
	)

Constructor.

Parameters

pT	is the triangle from which the edge is constructed
oppIdx_	is intra-triangle-index of the opposite vertex (of the edge) in pT

The orientation of the constructed Edge2 is counterclockwise (CCW) with respect to pT. Example: Edge2(pT,0) creates an edge from pT->getCorner(1) to pT->getCorner(2).

Member Function Documentation

getIndex()

int GEOM_FADE2D::Edge2::getIndex

(

)

const

Get the opposite index

Returns

the intra-triangle-index of the opposite vertex

getLength2D()

double GEOM_FADE2D::Edge2::getLength2D

(

)

const

Get the length

Returns

the length of the edge

getPoints()

void GEOM_FADE2D::Edge2::getPoints	(	Point2 *&	p1,
		Point2 *&	p2
	)		const

Get the endpoints.

returns the source point of the edge as p1 and the target point as p2

getSrc()

Point2* GEOM_FADE2D::Edge2::getSrc

(

)

const

Get the source point.

Returns

the source point of the edge, i.e. pT->getCorner((oppIdx+1)%3)

getTrg()

Point2* GEOM_FADE2D::Edge2::getTrg

(

)

const

Get the target point.

Returns

the target point of the edge, i.e. pT->getCorner((oppIdx+2)%3)

getTriangle()

Triangle2* GEOM_FADE2D::Edge2::getTriangle

(

)

const

Get the triangle

Returns

the triangle whose directed edge the present edge is

getTriangles()

void GEOM_FADE2D::Edge2::getTriangles	(	Triangle2 *&	pT0,
		Triangle2 *&	pT1,
		int &	idx0,
		int &	idx1
	)		const

Get the triangles

Returns

the two adjacent triangles of the present edge along with their intra-triangle-indices

Parameters

pT0	is used to return the triangle whose directed edge the present edge is
idx0	is the opposite intra-triangle-index in pT0 of the present edge
pT1	is the other adjacent triangle at the present edge (or NULL)
idx1	is the intra-triangle index of the present edge in pT1 (or -1)

operator!=()

bool GEOM_FADE2D::Edge2::operator!= ( const Edge2 &  e ) const

inline

operator!=()

operator!=() returns true if the compared edges are different. Be aware that edges are directed and therefore two adjacent triangles do not share the same Edge2.

operator<()

bool GEOM_FADE2D::Edge2::operator< ( const Edge2 &  e ) const

inline

operator<()

operator<() does NOT compare edge lengths but the associated triangle pointers and intra-triangle indices. This is useful when edges are used in STL containers.

operator==()

bool GEOM_FADE2D::Edge2::operator== ( const Edge2 &  e ) const

inline

operator==()

operator==() compares oriented edges, i.e., it returns only true when the two edges have been made from the same triangle and the same intra-triangle-index i.e., an edge with two adjacent triangles has two Edge2 objects, one in each direction.

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

• Edge2.h