/// <summary>
/// 入力した辺に含まれない頂点を返す
/// </summary>
/// <returns>The vertex.</returns>
/// <param name="e">E.</param>
public Vertex2D ExcludeVertex(Edge2D e)
{
if (!e.HasVertex(a))
{
return(a);
}
else if (!e.HasVertex(b))
{
return(b);
}
else
{
return(c);
}
}
public Vertex2D IncludeVertex(Edge2D e)
{
if (e.HasVertex(a))
{
return(a);
}
else
{
return(b);
}
}