Face Class Reference

The Face class represents a face of a 3D object. More...

#include <face.h>

List of all members.

Public Member Functions
	Face ()
	Face (int i0, int i1, int i2, int i3=-1)
void	addVertexIndex (int i)
int	numVertices () const
int	vertexIndex (int i) const
Vector	normal () const
void	computeNormal (const vector< Vertex > &verts)

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Detailed Description

Each face keeps a list of vertices (actually vertex indices) and a normal vector. The face is assumed to be convex.

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Constructor & Destructor Documentation

Face::Face

(

)

Constructs an empty face.

Face::Face	(	int	i0,
		int	i1,
		int	i2,
		int	i3 = -1
	)

Constructs a face with 3 or 4 vertices (actually vertex indices).

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Member Function Documentation

void Face::addVertexIndex

(

int

i

)

Adds a new vertex index i to the face (at the end, i.e. push_back).

void Face::computeNormal

(

const vector< Vertex > &

verts

)

Recomputes the normal vector of the face. This method must be called explicitly after constructing/modifying the face.

Parameters:

verts

contains actual vertex coordinates from the object containing the face.

Vector Face::normal

(

)

const

Returns the current normal vector of the face (undefined by default). The return value is thus undefined unless computeNormal() has been called for this face.

int Face::numVertices

(

)

const

Returns the number of vertices forming the face.

int Face::vertexIndex

(

int

i

)

const

Returns the vertex index at the i-th position. First vertex has index 0.