// 增加顶点
public void AddPathNode(PathPoint point)
{
if (_points.Count == 0)
{
_points.Add(point);
}
else
{
PathPoint temp = _points[_points.Count - 1];
temp.SetNext(point);
point.SetPrev(temp);
_points.Add(point);
}
}
// 删除顶点，point 必须是_points中的对象
public void DeletePathNode(PathPoint point)
{
if (point == null || _points.Contains(point) == false)
{
return;
}
PathPoint prev = point.GetPrev();
PathPoint next = point.GetNext();
if (prev != null)
{
prev.SetNext(next); // 目标节点的上一个顶点指向目标的下一个顶点
}
if (next != null)
{
next.SetPrev(prev); // 目标节点的下一个节点指向目标的上一个节点
}
_points.Remove(point);
}