QEM::Edge Class Reference

This represents the adjacency of two connected vertices in a mesh, and is only to be used with the ProgMesh class. More...

#include <QEM_Edge.h>

List of all members.

Public Methods
	Edge (int FaceIndex1, int whichEdge, int VertexIndex1, int VertexIndex2)
void	assertValid ()
void	printDebugString ()
int	edgeIndexFirst () const
	If we're adjacent to a first face, we actually know not only the index of the face, but also which of its 3 iterators points to us. More...
int	edgeIndexSecond () const
int	faceIndexFirst () const
int	faceIndexSecond () const
bool	hasFirstNeighbor () const
bool	hasSecondNeighbor () const
bool	hasFace (int faceIndex) const
bool	isBorder () const
bool	hasVertex (int vertexIndex) const
int	getV1 () const
int	getV2 () const
bool	operator< (const Edge &e) const
	Edges are compared primarily by their Quadric Error Metric. More...
bool	operator== (const Edge &e) const
bool	operator!= (const Edge &e) const
mfloat	getCachedCost () const
void	setFace1 (int faceIndex, int whichEdge)
void	setFace2 (int faceIndex, int whichEdge)
void	removeFace1 ()
void	removeFace2 ()
void	setCachedCost (mfloat cost)
bool	swapVertexIndex (int from1, int from2, int to)
	Every edge has two vertices. More...
Static Public Attributes
VertexArray *	varray
	the "Edge" class has a static vertex array in it, which serves to help comparison of edge lengths, in "operator<()". More...

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Detailed Description

This represents the adjacency of two connected vertices in a mesh, and is only to be used with the ProgMesh class.

Definition at line 25 of file QEM_Edge.h.

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Member Function Documentation

int Edge::edgeIndexFirst (    )  const

If we're adjacent to a first face, we actually know not only the index of the face, but also which of its 3 iterators points to us. Member variables "face1" and "face2" are actually the (face-index * 3) + edge-index-in-face. If our first face had index 5, and it's second (out of 3) edge iterator pointed to us, then we'd return (5*3) + 2. So faceIndexFirst() returns a subset of the information returned by this method. Definition at line 132 of file QEM_Edge.cpp.

int Edge::edgeIndexSecond (    )  const

See also: Edge::edgeIndexFirst() Definition at line 145 of file QEM_Edge.cpp.

bool Edge::operator< (  const Edge &    e )  const

Edges are compared primarily by their Quadric Error Metric. If those are equal, then they're compared by length. Definition at line 38 of file QEM_Edge.cpp.

bool Edge::swapVertexIndex (  int    from1, int    from2, int    to )

Every edge has two vertices. If one of the vertices matches the "from", parameter, we replace it. Note: this method will not allow creation of degenerate edges, and it cannot be called on degenerate edges. Definition at line 61 of file QEM_Edge.cpp.

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Member Data Documentation

VertexArray * Edge::varray [static]

the "Edge" class has a static vertex array in it, which serves to help comparison of edge lengths, in "operator<()". Todo: Find a way to not have this be static. It's not thread safe, etc. Definition at line 32 of file QEM_Edge.cpp. Referenced by operator<(), and swapVertexIndex().

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

• QEM_Edge.h
• QEM_Edge.cpp

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