Object

Inherited By: AudioServer, CameraServer, ClassDB, DisplayServer, EditorFileSystemDirectory, EditorPaths, EditorSelection, EditorVCSInterface, Engine, EngineDebugger, Geometry2D, Geometry3D, GodotSharp, Input, InputMap, IP, JavaClassWrapper, JavaScriptBridge, JNISingleton, JSONRPC, MainLoop, Marshalls, MovieWriter, NativeExtensionManager, NavigationMeshGenerator, NavigationServer2D, NavigationServer3D, Node, OS, Performance, PhysicsDirectBodyState2D, PhysicsDirectBodyState3D, PhysicsDirectSpaceState2D, PhysicsDirectSpaceState3D, PhysicsServer2D, PhysicsServer2DManager, PhysicsServer3D, PhysicsServer3DManager, PhysicsServer3DRenderingServerHandler, ProjectSettings, RefCounted, RenderingDevice, RenderingServer, ResourceLoader, ResourceSaver, ResourceUID, ScriptLanguage, TextServerManager, ThemeDB, TileData, Time, TranslationServer, TreeItem, UndoRedo, WorkerThreadPool, XRServer

Base class for all non-built-in types.

Description

Every class which is not a built-in type inherits from this class.

You can construct Objects from scripting languages, using Object.new() in GDScript, or new Object in C#.

Objects do not manage memory. If a class inherits from Object, you will have to delete instances of it manually. To do so, call the free method from your script or delete the instance from C++.

Some classes that extend Object add memory management. This is the case of RefCounted, which counts references and deletes itself automatically when no longer referenced. Node, another fundamental type, deletes all its children when freed from memory.

Objects export properties, which are mainly useful for storage and editing, but not really so much in programming. Properties are exported in _get_property_list and handled in _get and _set. However, scripting languages and C++ have simpler means to export them.

Property membership can be tested directly in GDScript using in:

var n = Node2D.new()
print("position" in n) # Prints "true".
print("other_property" in n) # Prints "false".

The in operator will evaluate to true as long as the key exists, even if the value is null.

Objects also receive notifications. Notifications are a simple way to notify the object about different events, so they can all be handled together. See _notification.

Note: Unlike references to a RefCounted, references to an Object stored in a variable can become invalid without warning. Therefore, it's recommended to use RefCounted for data classes instead of Object.

Note: The script property is not exposed like most properties, but it does have a setter and getter (set_script() and get_script()).

Tutorials

Methods

Variant

_get ( StringName property ) virtual

Dictionary[]

_get_property_list ( ) virtual

void

_init ( ) virtual

void

_notification ( int what ) virtual

bool

_property_can_revert ( StringName property ) virtual

Variant

_property_get_revert ( StringName property ) virtual

bool

_set ( StringName property, Variant value ) virtual

String

_to_string ( ) virtual

void

add_user_signal ( String signal, Array arguments=[] )

Variant

call ( StringName method, ... ) vararg

Variant

call_deferred ( StringName method, ... ) vararg

Variant

callv ( StringName method, Array arg_array )

bool

can_translate_messages ( ) const

Error

connect ( StringName signal, Callable callable, int flags=0 )

void

disconnect ( StringName signal, Callable callable )

Error

emit_signal ( StringName signal, ... ) vararg

void

free ( )

Variant

get ( StringName property ) const

String

get_class ( ) const

Dictionary[]

get_incoming_connections ( ) const

Variant

get_indexed ( NodePath property_path ) const

int

get_instance_id ( ) const

Variant

get_meta ( StringName name, Variant default=null ) const

PackedStringArray

get_meta_list ( ) const

Dictionary[]

get_method_list ( ) const

Dictionary[]

get_property_list ( ) const

Variant

get_script ( ) const

Dictionary[]

get_signal_connection_list ( StringName signal ) const

Dictionary[]

get_signal_list ( ) const

bool

has_meta ( StringName name ) const

bool

has_method ( StringName method ) const

bool

has_signal ( StringName signal ) const

bool

has_user_signal ( StringName signal ) const

bool

is_blocking_signals ( ) const

bool

is_class ( String class ) const

bool

is_connected ( StringName signal, Callable callable ) const

bool

is_queued_for_deletion ( ) const

void

notification ( int what, bool reversed=false )

void

notify_property_list_changed ( )

void

remove_meta ( StringName name )

void

set ( StringName property, Variant value )

void

set_block_signals ( bool enable )

void

set_deferred ( StringName property, Variant value )

void

set_indexed ( NodePath property_path, Variant value )

void

set_message_translation ( bool enable )

void

set_meta ( StringName name, Variant value )

void

set_script ( Variant script )

String

to_string ( )

String

tr ( StringName message, StringName context="" ) const

String

tr_n ( StringName message, StringName plural_message, int n, StringName context="" ) const

Signals

  • property_list_changed ( )


  • script_changed ( )

Emitted whenever the object's script is changed.

Enumerations

enum ConnectFlags:

  • CONNECT_DEFERRED = 1 --- Connects a signal in deferred mode. This way, signal emissions are stored in a queue, then set on idle time.

  • CONNECT_PERSIST = 2 --- Persisting connections are saved when the object is serialized to file.

  • CONNECT_ONE_SHOT = 4 --- One-shot connections disconnect themselves after emission.

  • CONNECT_REFERENCE_COUNTED = 8 --- Connect a signal as reference-counted. This means that a given signal can be connected several times to the same target, and will only be fully disconnected once no references are left.

Constants

  • NOTIFICATION_POSTINITIALIZE = 0 --- Called right when the object is initialized. Not available in script.

  • NOTIFICATION_PREDELETE = 1 --- Called before the object is about to be deleted.

Method Descriptions

Virtual method which can be overridden to customize the return value of get.

Returns the given property. Returns null if the property does not exist.


Virtual method which can be overridden to customize the return value of get_property_list.

Returns the object's property list as an Array of dictionaries.

Each property's Dictionary must contain at least name: String and type: int (see Variant.Type) entries. Optionally, it can also include hint: int (see PropertyHint), hint_string: String, and usage: int (see PropertyUsageFlags).


  • void _init ( ) virtual

Called when the object is initialized in memory. Can be defined to take in parameters, that are passed in when constructing.

Note: If _init is defined with required parameters, then explicit construction is the only valid means of creating an Object of the class. If any other means (such as PackedScene.instantiate) is used, then initialization will fail.


  • void _notification ( int what ) virtual

Called whenever the object receives a notification, which is identified in what by a constant. The base Object has two constants NOTIFICATION_POSTINITIALIZE and NOTIFICATION_PREDELETE, but subclasses such as Node define a lot more notifications which are also received by this method.


Virtual methods that can be overridden to customize the property revert behavior in the editor.

Returns true if the property identified by name can be reverted to a default value. Override _property_get_revert to return the actual value.


Virtual methods that can be overridden to customize the property revert behavior in the editor.

Returns the default value of the property identified by name. _property_can_revert must be overridden as well for this method to be called.


Virtual method which can be overridden to customize the return value of set.

Sets a property. Returns true if the property exists.


  • String _to_string ( ) virtual

Virtual method which can be overridden to customize the return value of to_string, and thus the object's representation where it is converted to a string, e.g. with print(obj).

Returns a String representing the object. If not overridden, defaults to "[ClassName:RID]".


  • void add_user_signal ( String signal, Array arguments=[] )

Adds a user-defined signal. Arguments are optional, but can be added as an Array of dictionaries, each containing name: String and type: int (see Variant.Type) entries.


Calls the method on the object and returns the result. This method supports a variable number of arguments, so parameters are passed as a comma separated list.

Example:

var node = Node3D.new()
node.call("rotate", Vector3(1.0, 0.0, 0.0), 1.571)

Note: In C#, the method name must be specified as snake_case if it is defined by a built-in Godot node. This doesn't apply to user-defined methods where you should use the same convention as in the C# source (typically PascalCase).


Calls the method on the object during idle time. This method supports a variable number of arguments, so parameters are passed as a comma separated list.

Example:

var node = Node3D.new()
node.call_deferred("rotate", Vector3(1.0, 0.0, 0.0), 1.571)

Note: In C#, the method name must be specified as snake_case if it is defined by a built-in Godot node. This doesn't apply to user-defined methods where you should use the same convention as in the C# source (typically PascalCase).


Calls the method on the object and returns the result. Contrarily to call, this method does not support a variable number of arguments but expects all parameters to be via a single Array.

var node = Node3D.new()
node.callv("rotate", [Vector3(1.0, 0.0, 0.0), 1.571])

  • bool can_translate_messages ( ) const

Returns true if the object can translate strings. See set_message_translation and tr.


Connects a signal to a callable. Use flags to set deferred or one-shot connections. See ConnectFlags constants.

A signal can only be connected once to a Callable. It will print an error if already connected, unless the signal was connected with CONNECT_REFERENCE_COUNTED. To avoid this, first, use is_connected to check for existing connections.

If the callable's target is destroyed in the game's lifecycle, the connection will be lost.

Examples with recommended syntax:

Connecting signals is one of the most common operations in Godot and the API gives many options to do so, which are described further down. The code block below shows the recommended approach for both GDScript and C#.

func _ready():
    var button = Button.new()
    # `button_down` here is a Signal object, and we thus call the Signal.connect() method,
    # not Object.connect(). See discussion below for a more in-depth overview of the API.
    button.button_down.connect(_on_button_down)

    # This assumes that a `Player` class exists which defines a `hit` signal.
    var player = Player.new()
    # We use Signal.connect() again, and we also use the Callable.bind() method which
    # returns a new Callable with the parameter binds.
    player.hit.connect(_on_player_hit.bind("sword", 100))

func _on_button_down():
    print("Button down!")

func _on_player_hit(weapon_type, damage):
    print("Hit with weapon %s for %d damage." % [weapon_type, damage])

``Object.connect()`` or ``Signal.connect()``?

As seen above, the recommended method to connect signals is not connect. The code block below shows the four options for connecting signals, using either this legacy method or the recommended Signal.connect, and using either an implicit Callable or a manually defined one.

func _ready():
    var button = Button.new()
    # Option 1: Object.connect() with an implicit Callable for the defined function.
    button.connect("button_down", _on_button_down)
    # Option 2: Object.connect() with a constructed Callable using a target object and method name.
    button.connect("button_down", Callable(self, "_on_button_down"))
    # Option 3: Signal.connect() with an implicit Callable for the defined function.
    button.button_down.connect(_on_button_down)
    # Option 4: Signal.connect() with a constructed Callable using a target object and method name.
    button.button_down.connect(Callable(self, "_on_button_down"))

func _on_button_down():
    print("Button down!")

While all options have the same outcome (button's BaseButton.button_down signal will be connected to _on_button_down), option 3 offers the best validation: it will print a compile-time error if either the button_down signal or the _on_button_down callable are undefined. On the other hand, option 2 only relies on string names and will only be able to validate either names at runtime: it will print a runtime error if "button_down" doesn't correspond to a signal, or if "_on_button_down" is not a registered method in the object self. The main reason for using options 1, 2, or 4 would be if you actually need to use strings (e.g. to connect signals programmatically based on strings read from a configuration file). Otherwise, option 3 is the recommended (and fastest) method.

Parameter bindings and passing:

For legacy or language-specific reasons, there are also several ways to bind parameters to signals. One can pass a binds Array to connect or Signal.connect, or use the recommended Callable.bind method to create a new callable from an existing one, with the given parameter binds.

One can also pass additional parameters when emitting the signal with emit_signal. The examples below show the relationship between those two types of parameters.

func _ready():
    # This assumes that a `Player` class exists which defines a `hit` signal.
    var player = Player.new()
    # Option 1: Using Callable.bind().
    player.hit.connect(_on_player_hit.bind("sword", 100))
    # Option 2: Using a `binds` Array in Signal.connect() (same syntax for Object.connect()).
    player.hit.connect(_on_player_hit, ["sword", 100])

    # Parameters added when emitting the signal are passed first.
    player.emit_signal("hit", "Dark lord", 5)

# Four arguments, since we pass two when emitting (hit_by, level)
# and two when connecting (weapon_type, damage).
func _on_player_hit(hit_by, level, weapon_type, damage):
    print("Hit by %s (level %d) with weapon %s for %d damage." % [hit_by, level, weapon_type, damage])

Disconnects a signal from a given callable.

If you try to disconnect a connection that does not exist, the method will print an error. Use is_connected to ensure that the connection exists.


Emits the given signal. The signal must exist, so it should be a built-in signal of this class or one of its parent classes, or a user-defined signal. This method supports a variable number of arguments, so parameters are passed as a comma separated list.

Example:

emit_signal("hit", "sword", 100)
emit_signal("game_over")

  • void free ( )

Deletes the object from memory. Any pre-existing reference to the freed object will become invalid, e.g. is_instance_valid(object) will return false.


Returns the Variant value of the given property. If the property doesn't exist, this will return null.

Note: In C#, the property name must be specified as snake_case if it is defined by a built-in Godot node. This doesn't apply to user-defined properties where you should use the same convention as in the C# source (typically PascalCase).


Returns the object's class as a String. See also is_class.

Note: get_class does not take class_name declarations into account. If the object has a class_name defined, the base class name will be returned instead.


Returns an Array of dictionaries with information about signals that are connected to the object.

Each Dictionary contains three String entries:

  • source is a reference to the signal emitter.

  • signal_name is the name of the connected signal.

  • method_name is the name of the method to which the signal is connected.


Gets the object's property indexed by the given property_path. The path should be a NodePath relative to the current object and can use the colon character (:) to access nested properties.

Examples: "position:x" or "material:next_pass:blend_mode".

Note: Even though the method takes NodePath argument, it doesn't support actual paths to Nodes in the scene tree, only colon-separated sub-property paths. For the purpose of nodes, use Node.get_node_and_resource instead.


  • int get_instance_id ( ) const

Returns the object's unique instance ID.

This ID can be saved in EncodedObjectAsID, and can be used to retrieve the object instance with @GlobalScope.instance_from_id.


Returns the object's metadata entry for the given name.

Throws error if the entry does not exist, unless default is not null (in which case the default value will be returned). See also has_meta, set_meta and remove_meta.

Note: Metadata that has a name starting with an underscore (_) is considered editor-only. Editor-only metadata is not displayed in the Inspector and should not be edited.


Returns the object's metadata as a PackedStringArray.


Returns the object's methods and their signatures as an Array.


Returns the object's property list as an Array of dictionaries.

Each property's Dictionary contain at least name: String and type: int (see Variant.Type) entries. Optionally, it can also include hint: int (see PropertyHint), hint_string: String, and usage: int (see PropertyUsageFlags).


Returns the object's Script instance, or null if none is assigned.


Returns an Array of connections for the given signal.