private void AppendToStart(LineStripElement <T, TK> newElement, TK edge = null)
{
if (edge != null)
{
Edges.Add(edge);
}
if (InternalEquals(Start, newElement.Position))
{
return;
}
var firstVertex = Elements.First;
if (edge != null)
{
if (firstVertex.Value.Elements.Count == 2)
{
throw new Exception();
}
firstVertex.Value.Elements.Add(edge);
}
// ReSharper disable once PossibleNullReferenceException
if (Collinear(
newElement.Position,
firstVertex.Value.Position,
firstVertex.Next.Value.Position))
{
firstVertex.Value = newElement;
}
else
{
Elements.AddFirst(newElement);
}
}
public void AppendToEnd(LineStripElement <T, TK> newElement, TK edge = null)
{
if (edge != null)
{
Edges.Add(edge);
}
if (InternalEquals(End, newElement.Position))
{
return;
}
var lastVertex = Elements.Last;
if (edge != null)
{
if (lastVertex.Value.Elements.Count == 2)
{
throw new Exception();
}
lastVertex.Value.Elements.Add(edge);
}
// ReSharper disable once PossibleNullReferenceException
if (Collinear(
lastVertex.Previous.Value.Position,
lastVertex.Value.Position,
newElement.Position))
{
lastVertex.Value = newElement;
}
else
{
Elements.AddLast(newElement);
}
}
public void AppendToStart(T vertex, TK edge = null)
{
var newElement = new LineStripElement <T, TK>(vertex, edge);
AppendToStart(newElement, edge);
}