godot-docs/classes/class_physicsbody2d.rst

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.. _class_PhysicsBody2D:

PhysicsBody2D
=============

**Inherits:** :ref:`CollisionObject2D<class_CollisionObject2D>` **<** :ref:`Node2D<class_Node2D>` **<** :ref:`CanvasItem<class_CanvasItem>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

**Inherited By:** :ref:`KinematicBody2D<class_KinematicBody2D>`, :ref:`RigidBody2D<class_RigidBody2D>`, :ref:`StaticBody2D<class_StaticBody2D>`

**Category:** Core

Brief Description
-----------------

Base class for all objects affected by physics in 2D space.

Properties
----------

+-----------------------+----------------------------------------------------------------------+---+
| :ref:`int<class_int>` | :ref:`collision_layer<class_PhysicsBody2D_property_collision_layer>` | 1 |
+-----------------------+----------------------------------------------------------------------+---+
| :ref:`int<class_int>` | :ref:`collision_mask<class_PhysicsBody2D_property_collision_mask>`   | 1 |
+-----------------------+----------------------------------------------------------------------+---+
| :ref:`int<class_int>` | :ref:`layers<class_PhysicsBody2D_property_layers>`                   |   |
+-----------------------+----------------------------------------------------------------------+---+

Methods
-------

+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                      | :ref:`add_collision_exception_with<class_PhysicsBody2D_method_add_collision_exception_with>` **(** :ref:`Node<class_Node>` body **)**                   |
+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Array<class_Array>` | :ref:`get_collision_exceptions<class_PhysicsBody2D_method_get_collision_exceptions>` **(** **)**                                                        |
+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`   | :ref:`get_collision_layer_bit<class_PhysicsBody2D_method_get_collision_layer_bit>` **(** :ref:`int<class_int>` bit **)** const                          |
+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`   | :ref:`get_collision_mask_bit<class_PhysicsBody2D_method_get_collision_mask_bit>` **(** :ref:`int<class_int>` bit **)** const                            |
+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                      | :ref:`remove_collision_exception_with<class_PhysicsBody2D_method_remove_collision_exception_with>` **(** :ref:`Node<class_Node>` body **)**             |
+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                      | :ref:`set_collision_layer_bit<class_PhysicsBody2D_method_set_collision_layer_bit>` **(** :ref:`int<class_int>` bit, :ref:`bool<class_bool>` value **)** |
+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                      | :ref:`set_collision_mask_bit<class_PhysicsBody2D_method_set_collision_mask_bit>` **(** :ref:`int<class_int>` bit, :ref:`bool<class_bool>` value **)**   |
+---------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------+

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

PhysicsBody2D is an abstract base class for implementing a physics body. All \*Body2D types inherit from it.

Tutorials
---------

- :doc:`../tutorials/physics/physics_introduction`

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

.. _class_PhysicsBody2D_property_collision_layer:

- :ref:`int<class_int>` **collision_layer**

+-----------+----------------------------+
| *Default* | 1                          |
+-----------+----------------------------+
| *Setter*  | set_collision_layer(value) |
+-----------+----------------------------+
| *Getter*  | get_collision_layer()      |
+-----------+----------------------------+

The physics layers this area is in.

Collidable objects can exist in any of 32 different layers. These layers work like a tagging system, and are not visual. A collidable can use these layers to select with which objects it can collide, using the :ref:`collision_mask<class_PhysicsBody2D_property_collision_mask>` property.

A contact is detected if object A is in any of the layers that object B scans, or object B is in any layer scanned by object A.

.. _class_PhysicsBody2D_property_collision_mask:

- :ref:`int<class_int>` **collision_mask**

+-----------+---------------------------+
| *Default* | 1                         |
+-----------+---------------------------+
| *Setter*  | set_collision_mask(value) |
+-----------+---------------------------+
| *Getter*  | get_collision_mask()      |
+-----------+---------------------------+

The physics layers this area scans for collisions.

.. _class_PhysicsBody2D_property_layers:

- :ref:`int<class_int>` **layers**

Both :ref:`collision_layer<class_PhysicsBody2D_property_collision_layer>` and :ref:`collision_mask<class_PhysicsBody2D_property_collision_mask>`. Returns :ref:`collision_layer<class_PhysicsBody2D_property_collision_layer>` when accessed. Updates :ref:`collision_layer<class_PhysicsBody2D_property_collision_layer>` and :ref:`collision_mask<class_PhysicsBody2D_property_collision_mask>` when modified.

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

.. _class_PhysicsBody2D_method_add_collision_exception_with:

- void **add_collision_exception_with** **(** :ref:`Node<class_Node>` body **)**

Adds a body to the list of bodies that this body can't collide with.

.. _class_PhysicsBody2D_method_get_collision_exceptions:

- :ref:`Array<class_Array>` **get_collision_exceptions** **(** **)**

Returns an array of nodes that were added as collision exceptions for this body.

.. _class_PhysicsBody2D_method_get_collision_layer_bit:

- :ref:`bool<class_bool>` **get_collision_layer_bit** **(** :ref:`int<class_int>` bit **)** const

Returns an individual bit on the :ref:`collision_layer<class_PhysicsBody2D_property_collision_layer>`.

.. _class_PhysicsBody2D_method_get_collision_mask_bit:

- :ref:`bool<class_bool>` **get_collision_mask_bit** **(** :ref:`int<class_int>` bit **)** const

Returns an individual bit on the :ref:`collision_mask<class_PhysicsBody2D_property_collision_mask>`.

.. _class_PhysicsBody2D_method_remove_collision_exception_with:

- void **remove_collision_exception_with** **(** :ref:`Node<class_Node>` body **)**

Removes a body from the list of bodies that this body can't collide with.

.. _class_PhysicsBody2D_method_set_collision_layer_bit:

- void **set_collision_layer_bit** **(** :ref:`int<class_int>` bit, :ref:`bool<class_bool>` value **)**

Sets individual bits on the :ref:`collision_layer<class_PhysicsBody2D_property_collision_layer>` bitmask. Use this if you only need to change one layer's value.

.. _class_PhysicsBody2D_method_set_collision_mask_bit:

- void **set_collision_mask_bit** **(** :ref:`int<class_int>` bit, :ref:`bool<class_bool>` value **)**

Sets individual bits on the :ref:`collision_mask<class_PhysicsBody2D_property_collision_mask>` bitmask. Use this if you only need to change one layer's value.