/// <summary>
/// 寻路
/// </summary>
/// <param name="nodes">地图信息</param>
/// <param name="start">起点</param>
/// <param name="end">终点</param>
/// <returns>路径是否存在</returns>
public bool Search(Vector2 start, Vector2 end)
{
bool result = false;
if (!m_nodes.ContainsKey(start) || !m_nodes.ContainsKey(end))
{
return(result);
}
if (m_nodes[start].type != NodeType.Movable || m_nodes[end].type != NodeType.Movable)
{
return(result);
}
//设置终点
position_target = end;
//重置路径
for (int i = 0; i < t_nodes.GetLength(0); i++)
{
for (int j = 0; j < t_nodes.GetLength(1); j++)
{
t_nodes[i, j].Reset();
}
}
list_close.Clear();
list_open.Clear();
Node A = t_nodes[(int)start.x, (int)start.y];
A.G = 0;
A.H = Vector2.Distance(position_target, A.position);
A.F = A.G + A.H;
A.parent = null;
A.state = NodeState.Close;
list_close.Add(A);
do
{
if (list_open.Count > 0)
{
A = list_open[0];
}
for (int i = 0; i < list_open.Count; i++)
{
if (list_open[i].F < A.F)
{
A = list_open[i];
}
}
if (A.Compare(position_target))
{
result = true;
}
Node B = Search(A);
if (B != null)
{
do
{
B.type = NodeType.Route;
B = B.parent;
}while (B != null);
}
list_close.Add(A);
list_open.Remove(A);
A.state = NodeState.Close;
}while (list_open.Count > 0);
return(result);
}