#pragma once
#ifndef TCG_EDGE_H
#define TCG_EDGE_H
// STD includes
#include "assert.h"
namespace tcg
{
template <typename E>
struct edge_traits {
typedef typename E::vertices_const_iterator vertices_const_iterator;
typedef typename E::vertices_iterator vertices_iterator;
typedef typename E::faces_const_iterator faces_const_iterator;
typedef typename E::faces_iterator faces_iterator;
};
//-------------------------------------------------------------------------------
class Edge
{
public:
typedef const int *vertices_const_iterator;
typedef int *vertices_iterator;
typedef const int *faces_const_iterator;
typedef int *faces_iterator;
protected:
int m_v[2];
int m_f[2];
int m_index;
public:
Edge() : m_index(-1)
{
m_v[0] = -1, m_v[1] = -1;
m_f[0] = -1, m_f[1] = -1;
}
Edge(int v1, int v2) : m_index(-1)
{
m_v[0] = v1, m_v[1] = v2;
m_f[0] = -1, m_f[1] = -1;
}
~Edge() {}
void setIndex(int idx) { m_index = idx; }
int getIndex() const { return m_index; }
int vertex(int i) const { return m_v[i]; }
int verticesCount() const { return m_v[0] < 0 ? 0 : m_v[1] < 0 ? 1 : 2; }
int otherVertex(int v) const { return m_v[0] == v ? m_v[1] : m_v[0]; }
void addVertex(int v)
{
assert(verticesCount() < 2);
m_v[verticesCount()] = v;
}
void setVertex(int i, int v) { assert(i < verticesCount()), m_v[i] = v; }
vertices_iterator eraseVertex(vertices_iterator it)
{
*std::copy(it + 1, verticesEnd(), it) = -1;
return it;
}
vertices_const_iterator verticesBegin() const { return m_v; }
vertices_const_iterator verticesEnd() const { return m_v + verticesCount(); }
vertices_iterator verticesBegin() { return m_v; }
vertices_iterator verticesEnd() { return m_v + verticesCount(); }
int face(int i) const { return m_f[i]; }
int facesCount() const { return m_f[0] < 0 ? 0 : m_f[1] < 0 ? 1 : 2; }
int otherFace(int f) const { return m_f[0] == f ? m_f[1] : m_f[0]; }
void addFace(int f)
{
assert(facesCount() < 2);
m_f[facesCount()] = f;
}
void setFace(int i, int f) { assert(i < facesCount()), m_f[i] = f; }
faces_iterator eraseFace(faces_iterator it)
{
*std::copy(it + 1, facesEnd(), it) = -1;
return it;
}
faces_const_iterator facesBegin() const { return m_f; }
faces_const_iterator facesEnd() const { return m_f + facesCount(); }
faces_iterator facesBegin() { return m_f; }
faces_iterator facesEnd() { return m_f + facesCount(); }
};
} // namespace tcg
#endif // TCG_EDGE_H