G3D::MeshAlg::Face Class Reference

#include <MeshAlg.h>

Public Member Functions
	Face ()
bool	containsVertex (int v) const
bool	containsEdge (int e) const
bool	containsDirectedEdge (int e) const

Public Attributes
int	vertexIndex [3]
int	edgeIndex [3]

Static Public Attributes
static const int	NONE = INT_MIN

Detailed Description

Oriented, indexed triangle.

Constructor & Destructor Documentation

G3D::MeshAlg::Face::Face

(

)

 {
 for (int i = 0; i < 3; ++i) {
 edgeIndex[i] = 0;
 vertexIndex[i] = 0;
 }
}

Member Function Documentation

bool G3D::MeshAlg::Face::containsDirectedEdge ( int  e ) const

inline

Contains the forward edge e if e >= 0 and the backward edge ~e otherwise.

 {
 return contains(edgeIndex, 3, e);
 }

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bool G3D::MeshAlg::Face::containsEdge ( int  e ) const

inline

 {
 if (e < 0) {
 e = ~e;
 }
 return contains(edgeIndex, 3, e) || contains(edgeIndex, 3, ~e);
 }

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bool G3D::MeshAlg::Face::containsVertex ( int  v ) const

inline

 {
 return contains(vertexIndex, 3, v);
 }

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Member Data Documentation

int G3D::MeshAlg::Face::edgeIndex[3]

Edge indices in counter-clockwise order. Edges are undirected, so it is important to know which way each edge is pointing in a face. This is encoded using negative indices.

If edgeIndex[i] >= 0 then this face contains the directed edge between vertex indices edgeArray[face.edgeIndex[i]].vertexIndex[0] and edgeArray[face.edgeIndex[i]].vertexIndex[1].

If edgeIndex[i] < 0 then ~edgeIndex[i] (i.e. the two's complement of) is used and this face contains the directed edge between vertex indices edgeArray[~face.edgeIndex[i]].vertexIndex[0] and edgeArray[~face.edgeIndex[i]].vertexIndex[1].

Degenerate faces may include the same edge multiple times.

const int G3D::MeshAlg::Face::NONE = INT_MIN

static

Used by Edge::faceIndex to indicate a missing face. This is a large negative value.

int G3D::MeshAlg::Face::vertexIndex[3]

Vertices in the face in counter-clockwise order. Degenerate faces may include the same vertex multiple times.

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

• dep/g3dlite/include/G3D/MeshAlg.h
• dep/g3dlite/source/MeshAlg.cpp