godot-docs/classes/class_aabb.rst

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.. _class_AABB:

AABB
====

Axis-Aligned Bounding Box.

Description
-----------

``AABB`` consists of a position, a size, and several utility functions. It is typically used for fast overlap tests.

It uses floating-point coordinates. The 2D counterpart to ``AABB`` is :ref:`Rect2<class_Rect2>`.

**Note:** Unlike :ref:`Rect2<class_Rect2>`, ``AABB`` does not have a variant that uses integer coordinates.

Tutorials
---------

- :doc:`../tutorials/math/index`

- :doc:`../tutorials/math/vector_math`

- :doc:`../tutorials/math/vectors_advanced`

Properties
----------

+-------------------------------+-----------------------------------------------+------------------------+
| :ref:`Vector3<class_Vector3>` | :ref:`end<class_AABB_property_end>`           | ``Vector3( 0, 0, 0 )`` |
+-------------------------------+-----------------------------------------------+------------------------+
| :ref:`Vector3<class_Vector3>` | :ref:`position<class_AABB_property_position>` | ``Vector3( 0, 0, 0 )`` |
+-------------------------------+-----------------------------------------------+------------------------+
| :ref:`Vector3<class_Vector3>` | :ref:`size<class_AABB_property_size>`         | ``Vector3( 0, 0, 0 )`` |
+-------------------------------+-----------------------------------------------+------------------------+

Methods
-------

+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`AABB<class_AABB>`       | :ref:`AABB<class_AABB_method_AABB>` **(** :ref:`Vector3<class_Vector3>` position, :ref:`Vector3<class_Vector3>` size **)**                       |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`AABB<class_AABB>`       | :ref:`abs<class_AABB_method_abs>` **(** **)**                                                                                                    |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`encloses<class_AABB_method_encloses>` **(** :ref:`AABB<class_AABB>` with **)**                                                             |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`AABB<class_AABB>`       | :ref:`expand<class_AABB_method_expand>` **(** :ref:`Vector3<class_Vector3>` to_point **)**                                                       |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`     | :ref:`get_area<class_AABB_method_get_area>` **(** **)**                                                                                          |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Vector3<class_Vector3>` | :ref:`get_endpoint<class_AABB_method_get_endpoint>` **(** :ref:`int<class_int>` idx **)**                                                        |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Vector3<class_Vector3>` | :ref:`get_longest_axis<class_AABB_method_get_longest_axis>` **(** **)**                                                                          |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`         | :ref:`get_longest_axis_index<class_AABB_method_get_longest_axis_index>` **(** **)**                                                              |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`     | :ref:`get_longest_axis_size<class_AABB_method_get_longest_axis_size>` **(** **)**                                                                |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Vector3<class_Vector3>` | :ref:`get_shortest_axis<class_AABB_method_get_shortest_axis>` **(** **)**                                                                        |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`         | :ref:`get_shortest_axis_index<class_AABB_method_get_shortest_axis_index>` **(** **)**                                                            |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>`     | :ref:`get_shortest_axis_size<class_AABB_method_get_shortest_axis_size>` **(** **)**                                                              |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Vector3<class_Vector3>` | :ref:`get_support<class_AABB_method_get_support>` **(** :ref:`Vector3<class_Vector3>` dir **)**                                                  |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`AABB<class_AABB>`       | :ref:`grow<class_AABB_method_grow>` **(** :ref:`float<class_float>` by **)**                                                                     |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`has_no_area<class_AABB_method_has_no_area>` **(** **)**                                                                                    |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`has_no_surface<class_AABB_method_has_no_surface>` **(** **)**                                                                              |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`has_point<class_AABB_method_has_point>` **(** :ref:`Vector3<class_Vector3>` point **)**                                                    |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`AABB<class_AABB>`       | :ref:`intersection<class_AABB_method_intersection>` **(** :ref:`AABB<class_AABB>` with **)**                                                     |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`intersects<class_AABB_method_intersects>` **(** :ref:`AABB<class_AABB>` with **)**                                                         |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`intersects_plane<class_AABB_method_intersects_plane>` **(** :ref:`Plane<class_Plane>` plane **)**                                          |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`intersects_segment<class_AABB_method_intersects_segment>` **(** :ref:`Vector3<class_Vector3>` from, :ref:`Vector3<class_Vector3>` to **)** |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`       | :ref:`is_equal_approx<class_AABB_method_is_equal_approx>` **(** :ref:`AABB<class_AABB>` aabb **)**                                               |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`AABB<class_AABB>`       | :ref:`merge<class_AABB_method_merge>` **(** :ref:`AABB<class_AABB>` with **)**                                                                   |
+-------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+

Property Descriptions
---------------------

.. _class_AABB_property_end:

- :ref:`Vector3<class_Vector3>` **end**

+-----------+------------------------+
| *Default* | ``Vector3( 0, 0, 0 )`` |
+-----------+------------------------+

Ending corner. This is calculated as ``position + size``. Setting this value will change the size.

----

.. _class_AABB_property_position:

- :ref:`Vector3<class_Vector3>` **position**

+-----------+------------------------+
| *Default* | ``Vector3( 0, 0, 0 )`` |
+-----------+------------------------+

Beginning corner. Typically has values lower than :ref:`end<class_AABB_property_end>`.

----

.. _class_AABB_property_size:

- :ref:`Vector3<class_Vector3>` **size**

+-----------+------------------------+
| *Default* | ``Vector3( 0, 0, 0 )`` |
+-----------+------------------------+

Size from :ref:`position<class_AABB_property_position>` to :ref:`end<class_AABB_property_end>`. Typically, all components are positive.

If the size is negative, you can use :ref:`abs<class_AABB_method_abs>` to fix it.

Method Descriptions
-------------------

.. _class_AABB_method_AABB:

- :ref:`AABB<class_AABB>` **AABB** **(** :ref:`Vector3<class_Vector3>` position, :ref:`Vector3<class_Vector3>` size **)**

Constructs an ``AABB`` from a position and size.

----

.. _class_AABB_method_abs:

- :ref:`AABB<class_AABB>` **abs** **(** **)**

Returns an AABB with equivalent position and size, modified so that the most-negative corner is the origin and the size is positive.

----

.. _class_AABB_method_encloses:

- :ref:`bool<class_bool>` **encloses** **(** :ref:`AABB<class_AABB>` with **)**

Returns ``true`` if this ``AABB`` completely encloses another one.

----

.. _class_AABB_method_expand:

- :ref:`AABB<class_AABB>` **expand** **(** :ref:`Vector3<class_Vector3>` to_point **)**

Returns a copy of this ``AABB`` expanded to include a given point.

**Example:**

::

    # position (-3, 2, 0), size (1, 1, 1)
    var box = AABB(Vector3(-3, 2, 0), Vector3(1, 1, 1))
    # position (-3, -1, 0), size (3, 4, 2), so we fit both the original AABB and Vector3(0, -1, 2)
    var box2 = box.expand(Vector3(0, -1, 2))

----

.. _class_AABB_method_get_area:

- :ref:`float<class_float>` **get_area** **(** **)**

Returns the volume of the ``AABB``.

----

.. _class_AABB_method_get_endpoint:

- :ref:`Vector3<class_Vector3>` **get_endpoint** **(** :ref:`int<class_int>` idx **)**

Gets the position of the 8 endpoints of the ``AABB`` in space.

----

.. _class_AABB_method_get_longest_axis:

- :ref:`Vector3<class_Vector3>` **get_longest_axis** **(** **)**

Returns the normalized longest axis of the ``AABB``.

----

.. _class_AABB_method_get_longest_axis_index:

- :ref:`int<class_int>` **get_longest_axis_index** **(** **)**

Returns the index of the longest axis of the ``AABB`` (according to :ref:`Vector3<class_Vector3>`'s ``AXIS_*`` constants).

----

.. _class_AABB_method_get_longest_axis_size:

- :ref:`float<class_float>` **get_longest_axis_size** **(** **)**

Returns the scalar length of the longest axis of the ``AABB``.

----

.. _class_AABB_method_get_shortest_axis:

- :ref:`Vector3<class_Vector3>` **get_shortest_axis** **(** **)**

Returns the normalized shortest axis of the ``AABB``.

----

.. _class_AABB_method_get_shortest_axis_index:

- :ref:`int<class_int>` **get_shortest_axis_index** **(** **)**

Returns the index of the shortest axis of the ``AABB`` (according to :ref:`Vector3<class_Vector3>`::AXIS\* enum).

----

.. _class_AABB_method_get_shortest_axis_size:

- :ref:`float<class_float>` **get_shortest_axis_size** **(** **)**

Returns the scalar length of the shortest axis of the ``AABB``.

----

.. _class_AABB_method_get_support:

- :ref:`Vector3<class_Vector3>` **get_support** **(** :ref:`Vector3<class_Vector3>` dir **)**

Returns the support point in a given direction. This is useful for collision detection algorithms.

----

.. _class_AABB_method_grow:

- :ref:`AABB<class_AABB>` **grow** **(** :ref:`float<class_float>` by **)**

Returns a copy of the ``AABB`` grown a given amount of units towards all the sides.

----

.. _class_AABB_method_has_no_area:

- :ref:`bool<class_bool>` **has_no_area** **(** **)**

Returns ``true`` if the ``AABB`` is flat or empty.

----

.. _class_AABB_method_has_no_surface:

- :ref:`bool<class_bool>` **has_no_surface** **(** **)**

Returns ``true`` if the ``AABB`` is empty.

----

.. _class_AABB_method_has_point:

- :ref:`bool<class_bool>` **has_point** **(** :ref:`Vector3<class_Vector3>` point **)**

Returns ``true`` if the ``AABB`` contains a point.

----

.. _class_AABB_method_intersection:

- :ref:`AABB<class_AABB>` **intersection** **(** :ref:`AABB<class_AABB>` with **)**

Returns the intersection between two ``AABB``. An empty AABB (size 0,0,0) is returned on failure.

----

.. _class_AABB_method_intersects:

- :ref:`bool<class_bool>` **intersects** **(** :ref:`AABB<class_AABB>` with **)**

Returns ``true`` if the ``AABB`` overlaps with another.

----

.. _class_AABB_method_intersects_plane:

- :ref:`bool<class_bool>` **intersects_plane** **(** :ref:`Plane<class_Plane>` plane **)**

Returns ``true`` if the ``AABB`` is on both sides of a plane.

----

.. _class_AABB_method_intersects_segment:

- :ref:`bool<class_bool>` **intersects_segment** **(** :ref:`Vector3<class_Vector3>` from, :ref:`Vector3<class_Vector3>` to **)**

Returns ``true`` if the ``AABB`` intersects the line segment between ``from`` and ``to``.

----

.. _class_AABB_method_is_equal_approx:

- :ref:`bool<class_bool>` **is_equal_approx** **(** :ref:`AABB<class_AABB>` aabb **)**

Returns ``true`` if this ``AABB`` and ``aabb`` are approximately equal, by calling :ref:`@GDScript.is_equal_approx<class_@GDScript_method_is_equal_approx>` on each component.

----

.. _class_AABB_method_merge:

- :ref:`AABB<class_AABB>` **merge** **(** :ref:`AABB<class_AABB>` with **)**

Returns a larger ``AABB`` that contains both this ``AABB`` and ``with``.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`