This node implements simulated 2D physics. You do not control a RigidDynamicBody2D directly. Instead, you apply forces to it (gravity, impulses, etc.) and the physics simulation calculates the resulting movement based on its mass, friction, and other physical properties.
[b]Note:[/b] You should not change a RigidDynamicBody2D's [code]position[/code] or [code]linear_velocity[/code] every frame or even very often. If you need to directly affect the body's state, use [method _integrate_forces], which allows you to directly access the physics state.
Please also keep in mind that physics bodies manage their own transform which overwrites the ones you set. So any direct or indirect transformation (including scaling of the node or its parent) will be visible in the editor only, and immediately reset at runtime.
If you need to override the default physics behavior or add a transformation at runtime, you can write a custom force integration. See [member custom_integrator].
Allows you to read and safely modify the simulation state for the object. Use this instead of [method Node._physics_process] if you need to directly change the body's [code]position[/code] or other physics properties. By default, it works in addition to the usual physics behavior, but [member custom_integrator] allows you to disable the default behavior and write custom force integration for a body.
Adds a constant directional force without affecting rotation that keeps being applied over time until cleared with [code]constant_force = Vector2(0, 0)[/code].
This is equivalent to using [method add_constant_force] at the body's center of mass.
An impulse is time-independent! Applying an impulse every frame would result in a framerate-dependent force. For this reason, it should only be used when simulating one-time impacts (use the "_force" functions otherwise).
This is equivalent to using [method apply_impulse] at the body's center of mass.
An impulse is time-independent! Applying an impulse every frame would result in a framerate-dependent force. For this reason, it should only be used when simulating one-time impacts (use the "_force" functions otherwise).
[code]position[/code] is the offset from the body origin in global coordinates.
</description>
</method>
<methodname="apply_torque">
<returntype="void"/>
<argumentindex="0"name="torque"type="float"/>
<description>
Applies a rotational force without affecting position. A force is time dependent and meant to be applied every physics update.
Applies a rotational impulse to the body without affecting the position.
An impulse is time-independent! Applying an impulse every frame would result in a framerate-dependent force. For this reason, it should only be used when simulating one-time impacts (use the "_force" functions otherwise).
Returns a list of the bodies colliding with this one. Requires [member contact_monitor] to be set to [code]true[/code] and [member contacts_reported] to be set high enough to detect all the collisions.
[b]Note:[/b] The result of this test is not immediate after moving objects. For performance, list of collisions is updated once per frame and before the physics step. Consider using signals instead.
Sets the body's velocity on the given axis. The velocity in the given vector axis will be set as the given vector length. This is useful for jumping behavior.
Damps the body's rotation. By default, the body will use the [b]Default Angular Damp[/b] in [b]Project > Project Settings > Physics > 2d[/b] or any value override set by an [Area2D] the body is in. Depending on [member angular_damp_mode], you can set [member angular_damp] to be added to or to replace the body's damping value.
The body's custom center of mass, relative to the body's origin position, when [member center_of_mass_mode] is set to [constant CENTER_OF_MASS_MODE_CUSTOM]. This is the balanced point of the body, where applied forces only cause linear acceleration. Applying forces outside of the center of mass causes angular acceleration.
When [member center_of_mass_mode] is set to [constant CENTER_OF_MASS_MODE_AUTO] (default value), the center of mass is automatically computed.
[b]Note:[/b] The number of contacts is different from the number of collisions. Collisions between parallel edges will result in two contacts (one at each end).
Continuous collision detection tries to predict where a moving body will collide instead of moving it and correcting its movement after collision. Continuous collision detection is slower, but more precise and misses fewer collisions with small, fast-moving objects. Raycasting and shapecasting methods are available. See [enum CCDMode] for details.
If [code]true[/code], internal force integration is disabled for this body. Aside from collision response, the body will only move as determined by the [method _integrate_forces] function.
Multiplies the gravity applied to the body. The body's gravity is calculated from the [b]Default Gravity[/b] value in [b]Project > Project Settings > Physics > 2d[/b] and/or any additional gravity vector applied by [Area2D]s.
The body's moment of inertia. This is like mass, but for rotation: it determines how much torque it takes to rotate the body. The moment of inertia is usually computed automatically from the mass and the shapes, but this property allows you to set a custom value.
If set to [code]0[/code], inertia is automatically computed (default value).
Damps the body's movement. By default, the body will use the [b]Default Linear Damp[/b] in [b]Project > Project Settings > Physics > 2d[/b] or any value override set by an [Area2D] the body is in. Depending on [member linear_damp_mode], you can set [member linear_damp] to be added to or to replace the body's damping value.
The body's linear velocity in pixels per second. Can be used sporadically, but [b]don't set this every frame[/b], because physics may run in another thread and runs at a different granularity. Use [method _integrate_forces] as your process loop for precise control of the body state.
If [code]true[/code], the body will not move and will not calculate forces until woken up by another body through, for example, a collision, or by using the [method apply_impulse] or [method apply_force] methods.
Emitted when a collision with another [PhysicsBody2D] or [TileMap] occurs. Requires [member contact_monitor] to be set to [code]true[/code] and [member contacts_reported] to be set high enough to detect all the collisions. [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].
Emitted when the collision with another [PhysicsBody2D] or [TileMap] ends. Requires [member contact_monitor] to be set to [code]true[/code] and [member contacts_reported] to be set high enough to detect all the collisions. [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].
Emitted when one of this RigidDynamicBody2D's [Shape2D]s collides with another [PhysicsBody2D] or [TileMap]'s [Shape2D]s. Requires [member contact_monitor] to be set to [code]true[/code] and [member contacts_reported] to be set high enough to detect all the collisions. [TileMap]s are detected if the [TileSet] has Collision [Shape2D]s.
[code]body_shape_index[/code] the index of the [Shape2D] of the other [PhysicsBody2D] or [TileMap] used by the [PhysicsServer2D]. Get the [CollisionShape2D] node with [code]body.shape_owner_get_owner(body_shape_index)[/code].
[code]local_shape_index[/code] the index of the [Shape2D] of this RigidDynamicBody2D used by the [PhysicsServer2D]. Get the [CollisionShape2D] node with [code]self.shape_owner_get_owner(local_shape_index)[/code].
Emitted when the collision between one of this RigidDynamicBody2D's [Shape2D]s and another [PhysicsBody2D] or [TileMap]'s [Shape2D]s ends. Requires [member contact_monitor] to be set to [code]true[/code] and [member contacts_reported] to be set high enough to detect all the collisions. [TileMap]s are detected if the [TileSet] has Collision [Shape2D]s.
[code]body_shape_index[/code] the index of the [Shape2D] of the other [PhysicsBody2D] or [TileMap] used by the [PhysicsServer2D]. Get the [CollisionShape2D] node with [code]body.shape_owner_get_owner(body_shape_index)[/code].
[code]local_shape_index[/code] the index of the [Shape2D] of this RigidDynamicBody2D used by the [PhysicsServer2D]. Get the [CollisionShape2D] node with [code]self.shape_owner_get_owner(local_shape_index)[/code].
Emitted when the physics engine changes the body's sleeping state.
[b]Note:[/b] Changing the value [member sleeping] will not trigger this signal. It is only emitted if the sleeping state is changed by the physics engine or [code]emit_signal("sleeping_state_changed")[/code] is used.
Static body freeze mode (default). The body is not affected by gravity and forces. It can be only moved by user code and doesn't collide with other bodies along its path.
Kinematic body freeze mode. Similar to [constant FREEZE_MODE_STATIC], but collides with other bodies along its path when moved. Useful for a frozen body that needs to be animated.
