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.. _class_AStar2D:
AStar2D
=======
**继承：** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`
A\* 的一种实现，用于查找 2D 空间中连通图上两个顶点之间的最短路径。
.. rst-class:: classref-introduction-group
描述
----
A\* 算法的一种实现，用于在 2D 空间中的连通图上找到两个顶点之间的最短路径。
有关如何使用该类的更详尽的解释，请参阅 :ref:`AStar3D<class_AStar3D>`\ 。\ **AStar2D** 是 :ref:`AStar3D<class_AStar3D>` 的包装器，它强制执行 2D 坐标。
.. rst-class:: classref-introduction-group
教程
----
- `AStarGrid2D 的网格导航演示 <https://godotengine.org/asset-library/asset/2723>`__
.. rst-class:: classref-reftable-group
属性
----
.. table::
:widths: auto
+-------------------------+--------------------------------------------------------------------------------+-----------+
| :ref:`bool<class_bool>` | :ref:`neighbor_filter_enabled<class_AStar2D_property_neighbor_filter_enabled>` | ``false`` |
+-------------------------+--------------------------------------------------------------------------------+-----------+
.. rst-class:: classref-reftable-group
方法
----
.. table::
:widths: auto
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>` | :ref:`_compute_cost<class_AStar2D_private_method__compute_cost>`\ (\ from_id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`\ ) |virtual| |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>` | :ref:`_estimate_cost<class_AStar2D_private_method__estimate_cost>`\ (\ from_id\: :ref:`int<class_int>`, end_id\: :ref:`int<class_int>`\ ) |virtual| |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`_filter_neighbor<class_AStar2D_private_method__filter_neighbor>`\ (\ from_id\: :ref:`int<class_int>`, neighbor_id\: :ref:`int<class_int>`\ ) |virtual| |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`add_point<class_AStar2D_method_add_point>`\ (\ id\: :ref:`int<class_int>`, position\: :ref:`Vector2<class_Vector2>`, weight_scale\: :ref:`float<class_float>` = 1.0\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`are_points_connected<class_AStar2D_method_are_points_connected>`\ (\ id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, bidirectional\: :ref:`bool<class_bool>` = true\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`clear<class_AStar2D_method_clear>`\ (\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`connect_points<class_AStar2D_method_connect_points>`\ (\ id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, bidirectional\: :ref:`bool<class_bool>` = true\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`disconnect_points<class_AStar2D_method_disconnect_points>`\ (\ id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, bidirectional\: :ref:`bool<class_bool>` = true\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`get_available_point_id<class_AStar2D_method_get_available_point_id>`\ (\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`get_closest_point<class_AStar2D_method_get_closest_point>`\ (\ to_position\: :ref:`Vector2<class_Vector2>`, include_disabled\: :ref:`bool<class_bool>` = false\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Vector2<class_Vector2>` | :ref:`get_closest_position_in_segment<class_AStar2D_method_get_closest_position_in_segment>`\ (\ to_position\: :ref:`Vector2<class_Vector2>`\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedInt64Array<class_PackedInt64Array>` | :ref:`get_id_path<class_AStar2D_method_get_id_path>`\ (\ from_id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, allow_partial_path\: :ref:`bool<class_bool>` = false\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`get_point_capacity<class_AStar2D_method_get_point_capacity>`\ (\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedInt64Array<class_PackedInt64Array>` | :ref:`get_point_connections<class_AStar2D_method_get_point_connections>`\ (\ id\: :ref:`int<class_int>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`get_point_count<class_AStar2D_method_get_point_count>`\ (\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedInt64Array<class_PackedInt64Array>` | :ref:`get_point_ids<class_AStar2D_method_get_point_ids>`\ (\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedVector2Array<class_PackedVector2Array>` | :ref:`get_point_path<class_AStar2D_method_get_point_path>`\ (\ from_id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, allow_partial_path\: :ref:`bool<class_bool>` = false\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Vector2<class_Vector2>` | :ref:`get_point_position<class_AStar2D_method_get_point_position>`\ (\ id\: :ref:`int<class_int>`\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>` | :ref:`get_point_weight_scale<class_AStar2D_method_get_point_weight_scale>`\ (\ id\: :ref:`int<class_int>`\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`has_point<class_AStar2D_method_has_point>`\ (\ id\: :ref:`int<class_int>`\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`is_point_disabled<class_AStar2D_method_is_point_disabled>`\ (\ id\: :ref:`int<class_int>`\ ) |const| |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`remove_point<class_AStar2D_method_remove_point>`\ (\ id\: :ref:`int<class_int>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`reserve_space<class_AStar2D_method_reserve_space>`\ (\ num_nodes\: :ref:`int<class_int>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`set_point_disabled<class_AStar2D_method_set_point_disabled>`\ (\ id\: :ref:`int<class_int>`, disabled\: :ref:`bool<class_bool>` = true\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`set_point_position<class_AStar2D_method_set_point_position>`\ (\ id\: :ref:`int<class_int>`, position\: :ref:`Vector2<class_Vector2>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`set_point_weight_scale<class_AStar2D_method_set_point_weight_scale>`\ (\ id\: :ref:`int<class_int>`, weight_scale\: :ref:`float<class_float>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
属性说明
--------
.. _class_AStar2D_property_neighbor_filter_enabled:
.. rst-class:: classref-property
:ref:`bool<class_bool>` **neighbor_filter_enabled** = ``false`` :ref:`🔗<class_AStar2D_property_neighbor_filter_enabled>`
.. rst-class:: classref-property-setget
- |void| **set_neighbor_filter_enabled**\ (\ value\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **is_neighbor_filter_enabled**\ (\ )
如果为 ``true``\ ，则启用通过 :ref:`_filter_neighbor()<class_AStar2D_private_method__filter_neighbor>` 过滤邻接点。
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
方法说明
--------
.. _class_AStar2D_private_method__compute_cost:
.. rst-class:: classref-method
:ref:`float<class_float>` **_compute_cost**\ (\ from_id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`\ ) |virtual| |const| :ref:`🔗<class_AStar2D_private_method__compute_cost>`
计算两个连接点之间的成本时调用。
请注意，这个函数在默认的 **AStar2D** 类中是隐藏的。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_private_method__estimate_cost:
.. rst-class:: classref-method
:ref:`float<class_float>` **_estimate_cost**\ (\ from_id\: :ref:`int<class_int>`, end_id\: :ref:`int<class_int>`\ ) |virtual| |const| :ref:`🔗<class_AStar2D_private_method__estimate_cost>`
估算某个点和路径终点之间的成本时调用。
请注意，这个函数在默认的 **AStar2D** 类中是隐藏的。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_private_method__filter_neighbor:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **_filter_neighbor**\ (\ from_id\: :ref:`int<class_int>`, neighbor_id\: :ref:`int<class_int>`\ ) |virtual| |const| :ref:`🔗<class_AStar2D_private_method__filter_neighbor>`
进入邻接处理且 :ref:`neighbor_filter_enabled<class_AStar2D_property_neighbor_filter_enabled>` 为 ``true`` 时调用。如果返回 ``true``\ ，则不会处理对应的点。
请注意，这个函数在默认的 **AStar2D** 类中是隐藏的。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_add_point:
.. rst-class:: classref-method
|void| **add_point**\ (\ id\: :ref:`int<class_int>`, position\: :ref:`Vector2<class_Vector2>`, weight_scale\: :ref:`float<class_float>` = 1.0\ ) :ref:`🔗<class_AStar2D_method_add_point>`
在具有给定标识符的给定位置添加一个新点。\ ``id`` 必须为 0 或更大，\ ``weight_scale`` 必须为 0.0 或更大。
在确定从相邻点到此点的一段路程的总成本时，\ ``weight_scale`` 要乘以 :ref:`_compute_cost()<class_AStar2D_private_method__compute_cost>` 的结果。因此，在其他条件相同的情况下，算法优先选择 ``weight_scale`` 较低的点来形成路径。
.. tabs::
.. code-tab:: gdscript
var astar = AStar2D.new()
astar.add_point(1, Vector2(1, 0), 4) # 添加点 (1, 0)、权重为 4、ID 为 1
.. code-tab:: csharp
var astar = new AStar2D();
astar.AddPoint(1, new Vector2(1, 0), 4); // 添加点 (1, 0)、权重为 4、ID 为 1
如果已经存在一个给定 ``id`` 的点，则它的位置和权重缩放将被更新为给定值。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_are_points_connected:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **are_points_connected**\ (\ id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, bidirectional\: :ref:`bool<class_bool>` = true\ ) |const| :ref:`🔗<class_AStar2D_method_are_points_connected>`
返回两个给定点之间是否存在连接/线段。如果 ``bidirectional`` 为 ``false``\ ，则返回是否可以通过此段从 ``id`` 移动到 ``to_id``\ 。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_clear:
.. rst-class:: classref-method
|void| **clear**\ (\ ) :ref:`🔗<class_AStar2D_method_clear>`
清除所有点和线段。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_connect_points:
.. rst-class:: classref-method
|void| **connect_points**\ (\ id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, bidirectional\: :ref:`bool<class_bool>` = true\ ) :ref:`🔗<class_AStar2D_method_connect_points>`
在给定的点之间创建一个线段。如果 ``bidirectional`` 为 ``false``\ ，则只允许从 ``id`` 到 ``to_id`` 的移动，而不允许反向移动。
.. tabs::
.. code-tab:: gdscript
var astar = AStar2D.new()
astar.add_point(1, Vector2(1, 1))
astar.add_point(2, Vector2(0, 5))
astar.connect_points(1, 2, false)
.. code-tab:: csharp
var astar = new AStar2D();
astar.AddPoint(1, new Vector2(1, 1));
astar.AddPoint(2, new Vector2(0, 5));
astar.ConnectPoints(1, 2, false);
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_disconnect_points:
.. rst-class:: classref-method
|void| **disconnect_points**\ (\ id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, bidirectional\: :ref:`bool<class_bool>` = true\ ) :ref:`🔗<class_AStar2D_method_disconnect_points>`
删除给定点之间的线段。如果 ``bidirectional`` 为 ``false``\ ，则仅阻止从 ``id`` 到 ``to_id`` 的移动，并且可能会保留一个单向线段。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_available_point_id:
.. rst-class:: classref-method
:ref:`int<class_int>` **get_available_point_id**\ (\ ) |const| :ref:`🔗<class_AStar2D_method_get_available_point_id>`
返回下一个没有关联点的可用点 ID。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_closest_point:
.. rst-class:: classref-method
:ref:`int<class_int>` **get_closest_point**\ (\ to_position\: :ref:`Vector2<class_Vector2>`, include_disabled\: :ref:`bool<class_bool>` = false\ ) |const| :ref:`🔗<class_AStar2D_method_get_closest_point>`
返回距离 ``to_position`` 最近的点的 ID，可以选择将禁用的点考虑在内。如果点池中没有点，则返回 ``-1``\ 。
\ **注意：**\ 如果有多个点距离 ``to_position`` 最近，则返回 ID 最小的那个点，以保证结果的确定性。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_closest_position_in_segment:
.. rst-class:: classref-method
:ref:`Vector2<class_Vector2>` **get_closest_position_in_segment**\ (\ to_position\: :ref:`Vector2<class_Vector2>`\ ) |const| :ref:`🔗<class_AStar2D_method_get_closest_position_in_segment>`
返回最接近 ``to_position`` 的位置，该位置位于两个连接点之间的线段内。
.. tabs::
.. code-tab:: gdscript
var astar = AStar2D.new()
astar.add_point(1, Vector2(0, 0))
astar.add_point(2, Vector2(0, 5))
astar.connect_points(1, 2)
var res = astar.get_closest_position_in_segment(Vector2(3, 3)) # 返回 (0, 3)
.. code-tab:: csharp
var astar = new AStar2D();
astar.AddPoint(1, new Vector2(0, 0));
astar.AddPoint(2, new Vector2(0, 5));
astar.ConnectPoints(1, 2);
Vector2 res = astar.GetClosestPositionInSegment(new Vector2(3, 3)); // 返回 (0, 3)
结果位于从 ``y = 0`` 到 ``y = 5`` 的线段中。它是线段中距给定点最近的位置。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_id_path:
.. rst-class:: classref-method
:ref:`PackedInt64Array<class_PackedInt64Array>` **get_id_path**\ (\ from_id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, allow_partial_path\: :ref:`bool<class_bool>` = false\ ) :ref:`🔗<class_AStar2D_method_get_id_path>`
返回一个数组，其中包含构成由 AStar2D 在给定点之间找到的路径的点的 ID。数组从路径的起点到终点进行排序。
如果没有能够到达目标的有效路径，并且 ``allow_partial_path`` 为\ ``true``\ ，则返回能够到达的最接近目标点的路径。
\ **注意：**\ 如果 ``allow_partial_path`` 为 ``true`` 并且 ``to_id`` 处于禁用状态，搜索耗时可能异常地大。
.. tabs::
.. code-tab:: gdscript
var astar = AStar2D.new()
astar.add_point(1, Vector2(0, 0))
astar.add_point(2, Vector2(0, 1), 1) # 默认权重为 1
astar.add_point(3, Vector2(1, 1))
astar.add_point(4, Vector2(2, 0))
astar.connect_points(1, 2, false)
astar.connect_points(2, 3, false)
astar.connect_points(4, 3, false)
astar.connect_points(1, 4, false)
var res = astar.get_id_path(1, 3) # 返回 [1, 2, 3]
.. code-tab:: csharp
var astar = new AStar2D();
astar.AddPoint(1, new Vector2(0, 0));
astar.AddPoint(2, new Vector2(0, 1), 1); // 默认权重为 1
astar.AddPoint(3, new Vector2(1, 1));
astar.AddPoint(4, new Vector2(2, 0));
astar.ConnectPoints(1, 2, false);
astar.ConnectPoints(2, 3, false);
astar.ConnectPoints(4, 3, false);
astar.ConnectPoints(1, 4, false);
long[] res = astar.GetIdPath(1, 3); // 返回 [1, 2, 3]
如果将第 2 个点的权重更改为 3，则结果将改为 ``[1, 4, 3]``\ ，因为现在即使距离更长，通过第 4 点也比通过第 2 点“更容易”。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_point_capacity:
.. rst-class:: classref-method
:ref:`int<class_int>` **get_point_capacity**\ (\ ) |const| :ref:`🔗<class_AStar2D_method_get_point_capacity>`
该函数返回支持点的数据结构的容量，可以与 :ref:`reserve_space()<class_AStar2D_method_reserve_space>` 方法一起使用。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_point_connections:
.. rst-class:: classref-method
:ref:`PackedInt64Array<class_PackedInt64Array>` **get_point_connections**\ (\ id\: :ref:`int<class_int>`\ ) :ref:`🔗<class_AStar2D_method_get_point_connections>`
返回一个数组，其中包含与给定点形成连接的点的 ID。
.. tabs::
.. code-tab:: gdscript
var astar = AStar2D.new()
astar.add_point(1, Vector2(0, 0))
astar.add_point(2, Vector2(0, 1))
astar.add_point(3, Vector2(1, 1))
astar.add_point(4, Vector2(2, 0))
astar.connect_points(1, 2, true)
astar.connect_points(1, 3, true)
var neighbors = astar.get_point_connections(1) # 返回 [2, 3]
.. code-tab:: csharp
var astar = new AStar2D();
astar.AddPoint(1, new Vector2(0, 0));
astar.AddPoint(2, new Vector2(0, 1));
astar.AddPoint(3, new Vector2(1, 1));
astar.AddPoint(4, new Vector2(2, 0));
astar.ConnectPoints(1, 2, true);
astar.ConnectPoints(1, 3, true);
long[] neighbors = astar.GetPointConnections(1); // 返回 [2, 3]
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_point_count:
.. rst-class:: classref-method
:ref:`int<class_int>` **get_point_count**\ (\ ) |const| :ref:`🔗<class_AStar2D_method_get_point_count>`
返回点池中当前的点数。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_point_ids:
.. rst-class:: classref-method
:ref:`PackedInt64Array<class_PackedInt64Array>` **get_point_ids**\ (\ ) :ref:`🔗<class_AStar2D_method_get_point_ids>`
返回所有点 ID 的数组。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_point_path:
.. rst-class:: classref-method
:ref:`PackedVector2Array<class_PackedVector2Array>` **get_point_path**\ (\ from_id\: :ref:`int<class_int>`, to_id\: :ref:`int<class_int>`, allow_partial_path\: :ref:`bool<class_bool>` = false\ ) :ref:`🔗<class_AStar2D_method_get_point_path>`
返回一个数组，其中包含 AStar2D 在给定点之间找到的路径中的点。数组从路径的起点到终点进行排序。
如果没有通往目标的有效路径并且 ``allow_partial_path`` 为 ``true``\ ，则会返回通往距离目标最近的可达点的路径。
\ **注意：**\ 该方法不是线程安全的，同一时间只能有一个 :ref:`Thread<class_Thread>` 使用。请考虑使用 :ref:`Mutex<class_Mutex>` 来确保线程独占访问，避免竞态条件。
另外，如果 ``allow_partial_path`` 为 ``true`` 并且 ``to_id`` 处于禁用状态，搜索耗时可能异常地大。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_point_position:
.. rst-class:: classref-method
:ref:`Vector2<class_Vector2>` **get_point_position**\ (\ id\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_AStar2D_method_get_point_position>`
返回与给定 ``id`` 相关联的点的位置。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_get_point_weight_scale:
.. rst-class:: classref-method
:ref:`float<class_float>` **get_point_weight_scale**\ (\ id\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_AStar2D_method_get_point_weight_scale>`
返回与给定 ``id`` 关联的点的权重比例。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_has_point:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **has_point**\ (\ id\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_AStar2D_method_has_point>`
返回与给定 ``id`` 相关联的点是否存在。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_is_point_disabled:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **is_point_disabled**\ (\ id\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_AStar2D_method_is_point_disabled>`
返回用于寻路时点是否被禁用。默认情况下，所有点均被启用。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_remove_point:
.. rst-class:: classref-method
|void| **remove_point**\ (\ id\: :ref:`int<class_int>`\ ) :ref:`🔗<class_AStar2D_method_remove_point>`
从点池中移除与给定 ``id`` 关联的点。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_reserve_space:
.. rst-class:: classref-method
|void| **reserve_space**\ (\ num_nodes\: :ref:`int<class_int>`\ ) :ref:`🔗<class_AStar2D_method_reserve_space>`
在内部预留 ``num_nodes`` 个点的空间。适用于需要一次性添加大量已知数量的点的情况，例如添加网格上的点。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_set_point_disabled:
.. rst-class:: classref-method
|void| **set_point_disabled**\ (\ id\: :ref:`int<class_int>`, disabled\: :ref:`bool<class_bool>` = true\ ) :ref:`🔗<class_AStar2D_method_set_point_disabled>`
用于寻路时禁用或启用指定的点。适用于制作临时障碍物。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_set_point_position:
.. rst-class:: classref-method
|void| **set_point_position**\ (\ id\: :ref:`int<class_int>`, position\: :ref:`Vector2<class_Vector2>`\ ) :ref:`🔗<class_AStar2D_method_set_point_position>`
为具有给定 ``id`` 的点设置位置 ``position``\ 。
.. rst-class:: classref-item-separator
----
.. _class_AStar2D_method_set_point_weight_scale:
.. rst-class:: classref-method
|void| **set_point_weight_scale**\ (\ id\: :ref:`int<class_int>`, weight_scale\: :ref:`float<class_float>`\ ) :ref:`🔗<class_AStar2D_method_set_point_weight_scale>`
为给定的 ``id`` 的点设置 ``weight_scale``\ 。在确定从邻接点到这个点的一段路程的总成本时，\ ``weight_scale`` 要乘以 :ref:`_compute_cost()<class_AStar2D_private_method__compute_cost>` 的结果。
.. |virtual| replace:: :abbr:`virtual (本方法通常需要用户覆盖才能生效。)`
.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
.. |const| replace:: :abbr:`const (本方法无副作用，不会修改该实例的任何成员变量。)`
.. |vararg| replace:: :abbr:`vararg (本方法除了能接受在此处描述的参数外，还能够继续接受任意数量的参数。)`
.. |constructor| replace:: :abbr:`constructor (本方法用于构造某个类型。)`
.. |static| replace:: :abbr:`static (调用本方法无需实例，可直接使用类名进行调用。)`
.. |operator| replace:: :abbr:`operator (本方法描述的是使用本类型作为左操作数的有效运算符。)`
.. |bitfield| replace:: :abbr:`BitField (这个值是由下列位标志构成位掩码的整数。)`
.. |void| replace:: :abbr:`void (无返回值。)`
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