path: root/doc/classes/Area2D.xml

<?xml version="1.0" encoding="UTF-8" ?>
<class name="Area2D" inherits="CollisionObject2D" version="4.0">
	<brief_description>
		2D area for detection and physics and audio influence.
	</brief_description>
	<description>
		2D area that detects [CollisionObject2D] nodes overlapping, entering, or exiting. Can also alter or override local physics parameters (gravity, damping) and route audio to a custom audio bus.
	</description>
	<tutorials>
		<link title="Using Area2D">https://docs.godotengine.org/en/latest/tutorials/physics/using_area_2d.html</link>
		<link title="2D Dodge The Creeps Demo">https://godotengine.org/asset-library/asset/515</link>
		<link title="2D Pong Demo">https://godotengine.org/asset-library/asset/121</link>
		<link title="2D Platformer Demo">https://godotengine.org/asset-library/asset/120</link>
	</tutorials>
	<methods>
		<method name="get_collision_layer_bit" qualifiers="const">
			<return type="bool">
			</return>
			<argument index="0" name="bit" type="int">
			</argument>
			<description>
				Returns an individual bit on the layer mask. Describes whether other areas will collide with this one on the given layer.
			</description>
		</method>
		<method name="get_collision_mask_bit" qualifiers="const">
			<return type="bool">
			</return>
			<argument index="0" name="bit" type="int">
			</argument>
			<description>
				Returns an individual bit on the collision mask. Describes whether this area will collide with others on the given layer.
			</description>
		</method>
		<method name="get_overlapping_areas" qualifiers="const">
			<return type="Area2D[]">
			</return>
			<description>
				Returns a list of intersecting [Area2D]s. For performance reasons (collisions are all processed at the same time) this list is modified once during the physics step, not immediately after objects are moved. Consider using signals instead.
			</description>
		</method>
		<method name="get_overlapping_bodies" qualifiers="const">
			<return type="Node2D[]">
			</return>
			<description>
				Returns a list of intersecting [PhysicsBody2D]s. For performance reasons (collisions are all processed at the same time) this list is modified once during the physics step, not immediately after objects are moved. Consider using signals instead.
			</description>
		</method>
		<method name="overlaps_area" qualifiers="const">
			<return type="bool">
			</return>
			<argument index="0" name="area" type="Node">
			</argument>
			<description>
				If [code]true[/code], the given area overlaps the Area2D.
				[b]Note:[/b] The result of this test is not immediate after moving objects. For performance, list of overlaps is updated once per frame and before the physics step. Consider using signals instead.
			</description>
		</method>
		<method name="overlaps_body" qualifiers="const">
			<return type="bool">
			</return>
			<argument index="0" name="body" type="Node">
			</argument>
			<description>
				If [code]true[/code], the given physics body overlaps the Area2D.
				[b]Note:[/b] The result of this test is not immediate after moving objects. For performance, list of overlaps is updated once per frame and before the physics step. Consider using signals instead.
				The [code]body[/code] argument can either be a [PhysicsBody2D] or a [TileMap] instance (while TileMaps are not physics body themselves, they register their tiles with collision shapes as a virtual physics body).
			</description>
		</method>
		<method name="set_collision_layer_bit">
			<return type="void">
			</return>
			<argument index="0" name="bit" type="int">
			</argument>
			<argument index="1" name="value" type="bool">
			</argument>
			<description>
				Set/clear individual bits on the layer mask. This makes getting an area in/out of only one layer easier.
			</description>
		</method>
		<method name="set_collision_mask_bit">
			<return type="void">
			</return>
			<argument index="0" name="bit" type="int">
			</argument>
			<argument index="1" name="value" type="bool">
			</argument>
			<description>
				Set/clear individual bits on the collision mask. This makes selecting the areas scanned easier.
			</description>
		</method>
	</methods>
	<members>
		<member name="angular_damp" type="float" setter="set_angular_damp" getter="get_angular_damp" default="1.0">
			The rate at which objects stop spinning in this area. Represents the angular velocity lost per second.
			See [member ProjectSettings.physics/2d/default_angular_damp] for more details about damping.
		</member>
		<member name="audio_bus_name" type="StringName" setter="set_audio_bus_name" getter="get_audio_bus_name" default="@&quot;Master&quot;">
			The name of the area's audio bus.
		</member>
		<member name="audio_bus_override" type="bool" setter="set_audio_bus_override" getter="is_overriding_audio_bus" default="false">
			If [code]true[/code], the area's audio bus overrides the default audio bus.
		</member>
		<member name="collision_layer" type="int" setter="set_collision_layer" getter="get_collision_layer" default="1">
			The area's physics layer(s). Collidable objects can exist in any of 32 different layers. A contact is detected if object A is in any of the layers that object B scans, or object B is in any layers that object A scans. See also [member collision_mask]. See [url=https://docs.godotengine.org/en/latest/tutorials/physics/physics_introduction.html#collision-layers-and-masks]Collision layers and masks[/url] in the documentation for more information.
		</member>
		<member name="collision_mask" type="int" setter="set_collision_mask" getter="get_collision_mask" default="1">
			The physics layers this area scans to determine collision detection. See [url=https://docs.godotengine.org/en/latest/tutorials/physics/physics_introduction.html#collision-layers-and-masks]Collision layers and masks[/url] in the documentation for more information.
		</member>
		<member name="gravity" type="float" setter="set_gravity" getter="get_gravity" default="98.0">
			The area's gravity intensity (ranges from -1024 to 1024). This value multiplies the gravity vector. This is useful to alter the force of gravity without altering its direction.
		</member>
		<member name="gravity_distance_scale" type="float" setter="set_gravity_distance_scale" getter="get_gravity_distance_scale" default="0.0">
			The falloff factor for point gravity. The greater the value, the faster gravity decreases with distance.
		</member>
		<member name="gravity_point" type="bool" setter="set_gravity_is_point" getter="is_gravity_a_point" default="false">
			If [code]true[/code], gravity is calculated from a point (set via [member gravity_vec]). See also [member space_override].
		</member>
		<member name="gravity_vec" type="Vector2" setter="set_gravity_vector" getter="get_gravity_vector" default="Vector2( 0, 1 )">
			The area's gravity vector (not normalized). If gravity is a point (see [member gravity_point]), this will be the point of attraction.
		</member>
		<member name="linear_damp" type="float" setter="set_linear_damp" getter="get_linear_damp" default="0.1">
			The rate at which objects stop moving in this area. Represents the linear velocity lost per second.
			See [member ProjectSettings.physics/2d/default_linear_damp] for more details about damping.
		</member>
		<member name="monitorable" type="bool" setter="set_monitorable" getter="is_monitorable" default="true">
			If [code]true[/code], other monitoring areas can detect this area.
		</member>
		<member name="monitoring" type="bool" setter="set_monitoring" getter="is_monitoring" default="true">
			If [code]true[/code], the area detects bodies or areas entering and exiting it.
		</member>
		<member name="priority" type="float" setter="set_priority" getter="get_priority" default="0.0">
			The area's priority. Higher priority areas are processed first.
		</member>
		<member name="space_override" type="int" setter="set_space_override_mode" getter="get_space_override_mode" enum="Area2D.SpaceOverride" default="0">
			Override mode for gravity and damping calculations within this area. See [enum SpaceOverride] for possible values.
		</member>
	</members>
	<signals>
		<signal name="area_entered">
			<argument index="0" name="area" type="Area2D">
			</argument>
			<description>
				Emitted when another Area2D enters this Area2D. Requires [member monitoring] to be set to [code]true[/code].
				[code]area[/code] the other Area2D.
			</description>
		</signal>
		<signal name="area_exited">
			<argument index="0" name="area" type="Area2D">
			</argument>
			<description>
				Emitted when another Area2D exits this Area2D. Requires [member monitoring] to be set to [code]true[/code].
				[code]area[/code] the other Area2D.
			</description>
		</signal>
		<signal name="area_shape_entered">
			<argument index="0" name="area_id" type="int">
			</argument>
			<argument index="1" name="area" type="Area2D">
			</argument>
			<argument index="2" name="area_shape" type="int">
			</argument>
			<argument index="3" name="local_shape" type="int">
			</argument>
			<description>
				Emitted when one of another Area2D's [Shape2D]s enters one of this Area2D's [Shape2D]s. Requires [member monitoring] to be set to [code]true[/code].
				[code]area_id[/code] the [RID] of the other Area2D's [CollisionObject2D] used by the [PhysicsServer2D].
				[code]area[/code] the other Area2D.
				[code]area_shape[/code] the index of the [Shape2D] of the other Area2D used by the [PhysicsServer2D].
				[code]local_shape[/code] the index of the [Shape2D] of this Area2D used by the [PhysicsServer2D].
			</description>
		</signal>
		<signal name="area_shape_exited">
			<argument index="0" name="area_id" type="int">
			</argument>
			<argument index="1" name="area" type="Area2D">
			</argument>
			<argument index="2" name="area_shape" type="int">
			</argument>
			<argument index="3" name="local_shape" type="int">
			</argument>
			<description>
				Emitted when one of another Area2D's [Shape2D]s exits one of this Area2D's [Shape2D]s. Requires [member monitoring] to be set to [code]true[/code].
				[code]area_id[/code] the [RID] of the other Area2D's [CollisionObject2D] used by the [PhysicsServer2D].
				[code]area[/code] the other Area2D.
				[code]area_shape[/code] the index of the [Shape2D] of the other Area2D used by the [PhysicsServer2D].
				[code]local_shape[/code] the index of the [Shape2D] of this Area2D used by the [PhysicsServer2D].
			</description>
		</signal>
		<signal name="body_entered">
			<argument index="0" name="body" type="Node2D">
			</argument>
			<description>
				Emitted when a [PhysicsBody2D] or [TileMap] enters this Area2D. Requires [member monitoring] to be set to [code]true[/code]. [TileMap]s are detected if the [TileSet] has Collision [Shape2D]s.
				[code]body[/code] the [Node], if it exists in the tree, of the other [PhysicsBody2D] or [TileMap].
			</description>
		</signal>
		<signal name="body_exited">
			<argument index="0" name="body" type="Node2D">
			</argument>
			<description>
				Emitted when a [PhysicsBody2D] or [TileMap] exits this Area2D. Requires [member monitoring] to be set to [code]true[/code]. [TileMap]s are detected if the [TileSet] has Collision [Shape2D]s.
				[code]body[/code] the [Node], if it exists in the tree, of the other [PhysicsBody2D] or [TileMap].
			</description>
		</signal>
		<signal name="body_shape_entered">
			<argument index="0" name="body_id" type="int">
			</argument>
			<argument index="1" name="body" type="Node2D">
			</argument>
			<argument index="2" name="body_shape" type="int">
			</argument>
			<argument index="3" name="local_shape" type="int">
			</argument>
			<description>
				Emitted when one of a [PhysicsBody2D] or [TileMap]'s [Shape2D]s enters one of this Area2D's [Shape2D]s. Requires [member monitoring] to be set to [code]true[/code]. [TileMap]s are detected if the [TileSet] has Collision [Shape2D]s.
				[code]body_id[/code] the [RID] of the [PhysicsBody2D] or [TileSet]'s [CollisionObject2D] used by the [PhysicsServer2D].
				[code]body[/code] the [Node], if it exists in the tree, of the [PhysicsBody2D] or [TileMap].
				[code]body_shape[/code] the index of the [Shape2D] of the [PhysicsBody2D] or [TileMap] used by the [PhysicsServer2D].
				[code]local_shape[/code] the index of the [Shape2D] of this Area2D used by the [PhysicsServer2D].
			</description>
		</signal>
		<signal name="body_shape_exited">
			<argument index="0" name="body_id" type="int">
			</argument>
			<argument index="1" name="body" type="Node2D">
			</argument>
			<argument index="2" name="body_shape" type="int">
			</argument>
			<argument index="3" name="local_shape" type="int">
			</argument>
			<description>
				Emitted when one of a [PhysicsBody2D] or [TileMap]'s [Shape2D]s exits one of this Area2D's [Shape2D]s. Requires [member monitoring] to be set to [code]true[/code]. [TileMap]s are detected if the [TileSet] has Collision [Shape2D]s.
				[code]body_id[/code] the [RID] of the [PhysicsBody2D] or [TileSet]'s [CollisionObject2D] used by the [PhysicsServer2D].
				[code]body[/code] the [Node], if it exists in the tree, of the [PhysicsBody2D] or [TileMap].
				[code]body_shape[/code] the index of the [Shape2D] of the [PhysicsBody2D] or [TileMap] used by the [PhysicsServer2D].
				[code]local_shape[/code] the index of the [Shape2D] of this Area2D used by the [PhysicsServer2D].
			</description>
		</signal>
	</signals>
	<constants>
		<constant name="SPACE_OVERRIDE_DISABLED" value="0" enum="SpaceOverride">
			This area does not affect gravity/damping.
		</constant>
		<constant name="SPACE_OVERRIDE_COMBINE" value="1" enum="SpaceOverride">
			This area adds its gravity/damping values to whatever has been calculated so far (in [member priority] order).
		</constant>
		<constant name="SPACE_OVERRIDE_COMBINE_REPLACE" value="2" enum="SpaceOverride">
			This area adds its gravity/damping values to whatever has been calculated so far (in [member priority] order), ignoring any lower priority areas.
		</constant>
		<constant name="SPACE_OVERRIDE_REPLACE" value="3" enum="SpaceOverride">
			This area replaces any gravity/damping, even the defaults, ignoring any lower priority areas.
		</constant>
		<constant name="SPACE_OVERRIDE_REPLACE_COMBINE" value="4" enum="SpaceOverride">
			This area replaces any gravity/damping calculated so far (in [member priority] order), but keeps calculating the rest of the areas.
		</constant>
	</constants>
</class>