godot-docs/classes/class_animation.rst

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.. _class_Animation:

Animation
=========

**Inherits:** :ref:`Resource<class_Resource>` **<** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`

Contains data used to animate everything in the engine.

.. rst-class:: classref-introduction-group

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

An Animation resource contains data used to animate everything in the engine. Animations are divided into tracks, and each track must be linked to a node. The state of that node can be changed through time, by adding timed keys (events) to the track.

::

    # This creates an animation that makes the node "Enemy" move to the right by
    # 100 pixels in 0.5 seconds.
    var animation = Animation.new()
    var track_index = animation.add_track(Animation.TYPE_VALUE)
    animation.track_set_path(track_index, "Enemy:position:x")
    animation.track_insert_key(track_index, 0.0, 0)
    animation.track_insert_key(track_index, 0.5, 100)

Animations are just data containers, and must be added to nodes such as an :ref:`AnimationPlayer<class_AnimationPlayer>` or :ref:`AnimationTreePlayer<class_AnimationTreePlayer>` to be played back. Animation tracks have different types, each with its own set of dedicated methods. Check :ref:`TrackType<enum_Animation_TrackType>` to see available types.

.. rst-class:: classref-introduction-group

Tutorials
---------

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

.. rst-class:: classref-reftable-group

Properties
----------

.. table::
   :widths: auto

   +---------------------------+------------------------------------------------+-----------+
   | :ref:`float<class_float>` | :ref:`length<class_Animation_property_length>` | ``1.0``   |
   +---------------------------+------------------------------------------------+-----------+
   | :ref:`bool<class_bool>`   | :ref:`loop<class_Animation_property_loop>`     | ``false`` |
   +---------------------------+------------------------------------------------+-----------+
   | :ref:`float<class_float>` | :ref:`step<class_Animation_property_step>`     | ``0.1``   |
   +---------------------------+------------------------------------------------+-----------+

.. rst-class:: classref-reftable-group

Methods
-------

.. table::
   :widths: auto

   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`add_track<class_Animation_method_add_track>` **(** :ref:`TrackType<enum_Animation_TrackType>` type, :ref:`int<class_int>` at_position=-1 **)**                                                                                                                                                           |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`String<class_String>`                                | :ref:`animation_track_get_key_animation<class_Animation_method_animation_track_get_key_animation>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                          |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`animation_track_insert_key<class_Animation_method_animation_track_insert_key>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`String<class_String>` animation **)**                                                                                                        |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`animation_track_set_key_animation<class_Animation_method_animation_track_set_key_animation>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`String<class_String>` animation **)**                                                                                           |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>`                                  | :ref:`audio_track_get_key_end_offset<class_Animation_method_audio_track_get_key_end_offset>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>`                                  | :ref:`audio_track_get_key_start_offset<class_Animation_method_audio_track_get_key_start_offset>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                            |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Resource<class_Resource>`                            | :ref:`audio_track_get_key_stream<class_Animation_method_audio_track_get_key_stream>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                        |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`audio_track_insert_key<class_Animation_method_audio_track_insert_key>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`Resource<class_Resource>` stream, :ref:`float<class_float>` start_offset=0, :ref:`float<class_float>` end_offset=0 **)**                             |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`audio_track_set_key_end_offset<class_Animation_method_audio_track_set_key_end_offset>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` offset **)**                                                                                                      |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`audio_track_set_key_start_offset<class_Animation_method_audio_track_set_key_start_offset>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` offset **)**                                                                                                  |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`audio_track_set_key_stream<class_Animation_method_audio_track_set_key_stream>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`Resource<class_Resource>` stream **)**                                                                                                        |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Vector2<class_Vector2>`                              | :ref:`bezier_track_get_key_in_handle<class_Animation_method_bezier_track_get_key_in_handle>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Vector2<class_Vector2>`                              | :ref:`bezier_track_get_key_out_handle<class_Animation_method_bezier_track_get_key_out_handle>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                              |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>`                                  | :ref:`bezier_track_get_key_value<class_Animation_method_bezier_track_get_key_value>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                        |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`bezier_track_insert_key<class_Animation_method_bezier_track_insert_key>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`float<class_float>` value, :ref:`Vector2<class_Vector2>` in_handle=Vector2( 0, 0 ), :ref:`Vector2<class_Vector2>` out_handle=Vector2( 0, 0 ) **)** |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>`                                  | :ref:`bezier_track_interpolate<class_Animation_method_bezier_track_interpolate>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time **)** |const|                                                                                                                                           |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`bezier_track_set_key_in_handle<class_Animation_method_bezier_track_set_key_in_handle>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`Vector2<class_Vector2>` in_handle **)**                                                                                               |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`bezier_track_set_key_out_handle<class_Animation_method_bezier_track_set_key_out_handle>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`Vector2<class_Vector2>` out_handle **)**                                                                                            |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`bezier_track_set_key_value<class_Animation_method_bezier_track_set_key_value>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` value **)**                                                                                                               |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`clear<class_Animation_method_clear>` **(** **)**                                                                                                                                                                                                                                                         |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`copy_track<class_Animation_method_copy_track>` **(** :ref:`int<class_int>` track_idx, :ref:`Animation<class_Animation>` to_animation **)**                                                                                                                                                               |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`find_track<class_Animation_method_find_track>` **(** :ref:`NodePath<class_NodePath>` path **)** |const|                                                                                                                                                                                                  |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`get_track_count<class_Animation_method_get_track_count>` **(** **)** |const|                                                                                                                                                                                                                             |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`PoolIntArray<class_PoolIntArray>`                    | :ref:`method_track_get_key_indices<class_Animation_method_method_track_get_key_indices>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec, :ref:`float<class_float>` delta **)** |const|                                                                                              |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`String<class_String>`                                | :ref:`method_track_get_name<class_Animation_method_method_track_get_name>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                                  |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Array<class_Array>`                                  | :ref:`method_track_get_params<class_Animation_method_method_track_get_params>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                              |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`remove_track<class_Animation_method_remove_track>` **(** :ref:`int<class_int>` track_idx **)**                                                                                                                                                                                                           |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`track_find_key<class_Animation_method_track_find_key>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`bool<class_bool>` exact=false **)** |const|                                                                                                                          |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`bool<class_bool>`                                    | :ref:`track_get_interpolation_loop_wrap<class_Animation_method_track_get_interpolation_loop_wrap>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                         |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`InterpolationType<enum_Animation_InterpolationType>` | :ref:`track_get_interpolation_type<class_Animation_method_track_get_interpolation_type>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                                   |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`track_get_key_count<class_Animation_method_track_get_key_count>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                                                     |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>`                                  | :ref:`track_get_key_time<class_Animation_method_track_get_key_time>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                                        |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`float<class_float>`                                  | :ref:`track_get_key_transition<class_Animation_method_track_get_key_transition>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                            |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Variant<class_Variant>`                              | :ref:`track_get_key_value<class_Animation_method_track_get_key_value>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|                                                                                                                                                      |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`NodePath<class_NodePath>`                            | :ref:`track_get_path<class_Animation_method_track_get_path>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                                                               |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`TrackType<enum_Animation_TrackType>`                 | :ref:`track_get_type<class_Animation_method_track_get_type>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                                                               |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_insert_key<class_Animation_method_track_insert_key>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`Variant<class_Variant>` key, :ref:`float<class_float>` transition=1 **)**                                                                                        |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`bool<class_bool>`                                    | :ref:`track_is_enabled<class_Animation_method_track_is_enabled>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                                                           |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`bool<class_bool>`                                    | :ref:`track_is_imported<class_Animation_method_track_is_imported>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                                                         |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_move_down<class_Animation_method_track_move_down>` **(** :ref:`int<class_int>` track_idx **)**                                                                                                                                                                                                     |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_move_to<class_Animation_method_track_move_to>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` to_idx **)**                                                                                                                                                                           |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_move_up<class_Animation_method_track_move_up>` **(** :ref:`int<class_int>` track_idx **)**                                                                                                                                                                                                         |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_remove_key<class_Animation_method_track_remove_key>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)**                                                                                                                                                                    |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_remove_key_at_position<class_Animation_method_track_remove_key_at_position>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` position **)**                                                                                                                                       |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_enabled<class_Animation_method_track_set_enabled>` **(** :ref:`int<class_int>` track_idx, :ref:`bool<class_bool>` enabled **)**                                                                                                                                                                |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_imported<class_Animation_method_track_set_imported>` **(** :ref:`int<class_int>` track_idx, :ref:`bool<class_bool>` imported **)**                                                                                                                                                             |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_interpolation_loop_wrap<class_Animation_method_track_set_interpolation_loop_wrap>` **(** :ref:`int<class_int>` track_idx, :ref:`bool<class_bool>` interpolation **)**                                                                                                                          |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_interpolation_type<class_Animation_method_track_set_interpolation_type>` **(** :ref:`int<class_int>` track_idx, :ref:`InterpolationType<enum_Animation_InterpolationType>` interpolation **)**                                                                                                 |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_key_time<class_Animation_method_track_set_key_time>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` time **)**                                                                                                                                |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_key_transition<class_Animation_method_track_set_key_transition>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` transition **)**                                                                                                              |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_key_value<class_Animation_method_track_set_key_value>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key, :ref:`Variant<class_Variant>` value **)**                                                                                                                             |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_set_path<class_Animation_method_track_set_path>` **(** :ref:`int<class_int>` track_idx, :ref:`NodePath<class_NodePath>` path **)**                                                                                                                                                                 |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`track_swap<class_Animation_method_track_swap>` **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` with_idx **)**                                                                                                                                                                               |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`int<class_int>`                                      | :ref:`transform_track_insert_key<class_Animation_method_transform_track_insert_key>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`Vector3<class_Vector3>` location, :ref:`Quat<class_Quat>` rotation, :ref:`Vector3<class_Vector3>` scale **)**                                |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Array<class_Array>`                                  | :ref:`transform_track_interpolate<class_Animation_method_transform_track_interpolate>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec **)** |const|                                                                                                                                 |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`PoolIntArray<class_PoolIntArray>`                    | :ref:`value_track_get_key_indices<class_Animation_method_value_track_get_key_indices>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec, :ref:`float<class_float>` delta **)** |const|                                                                                                |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`UpdateMode<enum_Animation_UpdateMode>`               | :ref:`value_track_get_update_mode<class_Animation_method_value_track_get_update_mode>` **(** :ref:`int<class_int>` track_idx **)** |const|                                                                                                                                                                     |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`Variant<class_Variant>`                              | :ref:`value_track_interpolate<class_Animation_method_value_track_interpolate>` **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec **)** |const|                                                                                                                                         |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | void                                                       | :ref:`value_track_set_update_mode<class_Animation_method_value_track_set_update_mode>` **(** :ref:`int<class_int>` track_idx, :ref:`UpdateMode<enum_Animation_UpdateMode>` mode **)**                                                                                                                          |
   +------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

.. rst-class:: classref-section-separator

----

.. rst-class:: classref-descriptions-group

Signals
-------

.. _class_Animation_signal_tracks_changed:

.. rst-class:: classref-signal

**tracks_changed** **(** **)**

Emitted when there's a change in the list of tracks, e.g. tracks are added, moved or have changed paths.

.. rst-class:: classref-section-separator

----

.. rst-class:: classref-descriptions-group

Enumerations
------------

.. _enum_Animation_TrackType:

.. rst-class:: classref-enumeration

enum **TrackType**:

.. _class_Animation_constant_TYPE_VALUE:

.. rst-class:: classref-enumeration-constant

:ref:`TrackType<enum_Animation_TrackType>` **TYPE_VALUE** = ``0``

Value tracks set values in node properties, but only those which can be Interpolated.

.. _class_Animation_constant_TYPE_TRANSFORM:

.. rst-class:: classref-enumeration-constant

:ref:`TrackType<enum_Animation_TrackType>` **TYPE_TRANSFORM** = ``1``

Transform tracks are used to change node local transforms or skeleton pose bones. Transitions are interpolated.

.. _class_Animation_constant_TYPE_METHOD:

.. rst-class:: classref-enumeration-constant

:ref:`TrackType<enum_Animation_TrackType>` **TYPE_METHOD** = ``2``

Method tracks call functions with given arguments per key.

.. _class_Animation_constant_TYPE_BEZIER:

.. rst-class:: classref-enumeration-constant

:ref:`TrackType<enum_Animation_TrackType>` **TYPE_BEZIER** = ``3``

Bezier tracks are used to interpolate a value using custom curves. They can also be used to animate sub-properties of vectors and colors (e.g. alpha value of a :ref:`Color<class_Color>`).

.. _class_Animation_constant_TYPE_AUDIO:

.. rst-class:: classref-enumeration-constant

:ref:`TrackType<enum_Animation_TrackType>` **TYPE_AUDIO** = ``4``

Audio tracks are used to play an audio stream with either type of :ref:`AudioStreamPlayer<class_AudioStreamPlayer>`. The stream can be trimmed and previewed in the animation.

.. _class_Animation_constant_TYPE_ANIMATION:

.. rst-class:: classref-enumeration-constant

:ref:`TrackType<enum_Animation_TrackType>` **TYPE_ANIMATION** = ``5``

Animation tracks play animations in other :ref:`AnimationPlayer<class_AnimationPlayer>` nodes.

.. rst-class:: classref-item-separator

----

.. _enum_Animation_InterpolationType:

.. rst-class:: classref-enumeration

enum **InterpolationType**:

.. _class_Animation_constant_INTERPOLATION_NEAREST:

.. rst-class:: classref-enumeration-constant

:ref:`InterpolationType<enum_Animation_InterpolationType>` **INTERPOLATION_NEAREST** = ``0``

No interpolation (nearest value).

.. _class_Animation_constant_INTERPOLATION_LINEAR:

.. rst-class:: classref-enumeration-constant

:ref:`InterpolationType<enum_Animation_InterpolationType>` **INTERPOLATION_LINEAR** = ``1``

Linear interpolation.

.. _class_Animation_constant_INTERPOLATION_CUBIC:

.. rst-class:: classref-enumeration-constant

:ref:`InterpolationType<enum_Animation_InterpolationType>` **INTERPOLATION_CUBIC** = ``2``

Cubic interpolation.

.. rst-class:: classref-item-separator

----

.. _enum_Animation_UpdateMode:

.. rst-class:: classref-enumeration

enum **UpdateMode**:

.. _class_Animation_constant_UPDATE_CONTINUOUS:

.. rst-class:: classref-enumeration-constant

:ref:`UpdateMode<enum_Animation_UpdateMode>` **UPDATE_CONTINUOUS** = ``0``

Update between keyframes.

.. _class_Animation_constant_UPDATE_DISCRETE:

.. rst-class:: classref-enumeration-constant

:ref:`UpdateMode<enum_Animation_UpdateMode>` **UPDATE_DISCRETE** = ``1``

Update at the keyframes and hold the value.

.. _class_Animation_constant_UPDATE_TRIGGER:

.. rst-class:: classref-enumeration-constant

:ref:`UpdateMode<enum_Animation_UpdateMode>` **UPDATE_TRIGGER** = ``2``

Update at the keyframes.

.. _class_Animation_constant_UPDATE_CAPTURE:

.. rst-class:: classref-enumeration-constant

:ref:`UpdateMode<enum_Animation_UpdateMode>` **UPDATE_CAPTURE** = ``3``

Same as linear interpolation, but also interpolates from the current value (i.e. dynamically at runtime) if the first key isn't at 0 seconds.

.. rst-class:: classref-section-separator

----

.. rst-class:: classref-descriptions-group

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

.. _class_Animation_property_length:

.. rst-class:: classref-property

:ref:`float<class_float>` **length** = ``1.0``

.. rst-class:: classref-property-setget

- void **set_length** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_length** **(** **)**

The total length of the animation (in seconds).

\ **Note:** Length is not delimited by the last key, as this one may be before or after the end to ensure correct interpolation and looping.

.. rst-class:: classref-item-separator

----

.. _class_Animation_property_loop:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **loop** = ``false``

.. rst-class:: classref-property-setget

- void **set_loop** **(** :ref:`bool<class_bool>` value **)**
- :ref:`bool<class_bool>` **has_loop** **(** **)**

A flag indicating that the animation must loop. This is used for correct interpolation of animation cycles, and for hinting the player that it must restart the animation.

.. rst-class:: classref-item-separator

----

.. _class_Animation_property_step:

.. rst-class:: classref-property

:ref:`float<class_float>` **step** = ``0.1``

.. rst-class:: classref-property-setget

- void **set_step** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_step** **(** **)**

The animation step value.

.. rst-class:: classref-section-separator

----

.. rst-class:: classref-descriptions-group

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

.. _class_Animation_method_add_track:

.. rst-class:: classref-method

:ref:`int<class_int>` **add_track** **(** :ref:`TrackType<enum_Animation_TrackType>` type, :ref:`int<class_int>` at_position=-1 **)**

Adds a track to the Animation.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_animation_track_get_key_animation:

.. rst-class:: classref-method

:ref:`String<class_String>` **animation_track_get_key_animation** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the animation name at the key identified by ``key_idx``. The ``track_idx`` must be the index of an Animation Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_animation_track_insert_key:

.. rst-class:: classref-method

:ref:`int<class_int>` **animation_track_insert_key** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`String<class_String>` animation **)**

Inserts a key with value ``animation`` at the given ``time`` (in seconds). The ``track_idx`` must be the index of an Animation Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_animation_track_set_key_animation:

.. rst-class:: classref-method

void **animation_track_set_key_animation** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`String<class_String>` animation **)**

Sets the key identified by ``key_idx`` to value ``animation``. The ``track_idx`` must be the index of an Animation Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_audio_track_get_key_end_offset:

.. rst-class:: classref-method

:ref:`float<class_float>` **audio_track_get_key_end_offset** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the end offset of the key identified by ``key_idx``. The ``track_idx`` must be the index of an Audio Track.

End offset is the number of seconds cut off at the ending of the audio stream.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_audio_track_get_key_start_offset:

.. rst-class:: classref-method

:ref:`float<class_float>` **audio_track_get_key_start_offset** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the start offset of the key identified by ``key_idx``. The ``track_idx`` must be the index of an Audio Track.

Start offset is the number of seconds cut off at the beginning of the audio stream.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_audio_track_get_key_stream:

.. rst-class:: classref-method

:ref:`Resource<class_Resource>` **audio_track_get_key_stream** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the audio stream of the key identified by ``key_idx``. The ``track_idx`` must be the index of an Audio Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_audio_track_insert_key:

.. rst-class:: classref-method

:ref:`int<class_int>` **audio_track_insert_key** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`Resource<class_Resource>` stream, :ref:`float<class_float>` start_offset=0, :ref:`float<class_float>` end_offset=0 **)**

Inserts an Audio Track key at the given ``time`` in seconds. The ``track_idx`` must be the index of an Audio Track.

\ ``stream`` is the :ref:`AudioStream<class_AudioStream>` resource to play. ``start_offset`` is the number of seconds cut off at the beginning of the audio stream, while ``end_offset`` is at the ending.

.. rst-class:: classref-item-separator

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.. _class_Animation_method_audio_track_set_key_end_offset:

.. rst-class:: classref-method

void **audio_track_set_key_end_offset** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` offset **)**

Sets the end offset of the key identified by ``key_idx`` to value ``offset``. The ``track_idx`` must be the index of an Audio Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_audio_track_set_key_start_offset:

.. rst-class:: classref-method

void **audio_track_set_key_start_offset** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` offset **)**

Sets the start offset of the key identified by ``key_idx`` to value ``offset``. The ``track_idx`` must be the index of an Audio Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_audio_track_set_key_stream:

.. rst-class:: classref-method

void **audio_track_set_key_stream** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`Resource<class_Resource>` stream **)**

Sets the stream of the key identified by ``key_idx`` to value ``stream``. The ``track_idx`` must be the index of an Audio Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_bezier_track_get_key_in_handle:

.. rst-class:: classref-method

:ref:`Vector2<class_Vector2>` **bezier_track_get_key_in_handle** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the in handle of the key identified by ``key_idx``. The ``track_idx`` must be the index of a Bezier Track.

.. rst-class:: classref-item-separator

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.. _class_Animation_method_bezier_track_get_key_out_handle:

.. rst-class:: classref-method

:ref:`Vector2<class_Vector2>` **bezier_track_get_key_out_handle** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the out handle of the key identified by ``key_idx``. The ``track_idx`` must be the index of a Bezier Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_bezier_track_get_key_value:

.. rst-class:: classref-method

:ref:`float<class_float>` **bezier_track_get_key_value** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the value of the key identified by ``key_idx``. The ``track_idx`` must be the index of a Bezier Track.

.. rst-class:: classref-item-separator

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.. _class_Animation_method_bezier_track_insert_key:

.. rst-class:: classref-method

:ref:`int<class_int>` **bezier_track_insert_key** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`float<class_float>` value, :ref:`Vector2<class_Vector2>` in_handle=Vector2( 0, 0 ), :ref:`Vector2<class_Vector2>` out_handle=Vector2( 0, 0 ) **)**

Inserts a Bezier Track key at the given ``time`` in seconds. The ``track_idx`` must be the index of a Bezier Track.

\ ``in_handle`` is the left-side weight of the added Bezier curve point, ``out_handle`` is the right-side one, while ``value`` is the actual value at this point.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_bezier_track_interpolate:

.. rst-class:: classref-method

:ref:`float<class_float>` **bezier_track_interpolate** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time **)** |const|

Returns the interpolated value at the given ``time`` (in seconds). The ``track_idx`` must be the index of a Bezier Track.

.. rst-class:: classref-item-separator

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.. _class_Animation_method_bezier_track_set_key_in_handle:

.. rst-class:: classref-method

void **bezier_track_set_key_in_handle** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`Vector2<class_Vector2>` in_handle **)**

Sets the in handle of the key identified by ``key_idx`` to value ``in_handle``. The ``track_idx`` must be the index of a Bezier Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_bezier_track_set_key_out_handle:

.. rst-class:: classref-method

void **bezier_track_set_key_out_handle** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`Vector2<class_Vector2>` out_handle **)**

Sets the out handle of the key identified by ``key_idx`` to value ``out_handle``. The ``track_idx`` must be the index of a Bezier Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_bezier_track_set_key_value:

.. rst-class:: classref-method

void **bezier_track_set_key_value** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` value **)**

Sets the value of the key identified by ``key_idx`` to the given value. The ``track_idx`` must be the index of a Bezier Track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_clear:

.. rst-class:: classref-method

void **clear** **(** **)**

Clear the animation (clear all tracks and reset all).

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_copy_track:

.. rst-class:: classref-method

void **copy_track** **(** :ref:`int<class_int>` track_idx, :ref:`Animation<class_Animation>` to_animation **)**

Adds a new track that is a copy of the given track from ``to_animation``.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_find_track:

.. rst-class:: classref-method

:ref:`int<class_int>` **find_track** **(** :ref:`NodePath<class_NodePath>` path **)** |const|

Returns the index of the specified track. If the track is not found, return -1.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_get_track_count:

.. rst-class:: classref-method

:ref:`int<class_int>` **get_track_count** **(** **)** |const|

Returns the amount of tracks in the animation.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_method_track_get_key_indices:

.. rst-class:: classref-method

:ref:`PoolIntArray<class_PoolIntArray>` **method_track_get_key_indices** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec, :ref:`float<class_float>` delta **)** |const|

Returns all the key indices of a method track, given a position and delta time.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_method_track_get_name:

.. rst-class:: classref-method

:ref:`String<class_String>` **method_track_get_name** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the method name of a method track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_method_track_get_params:

.. rst-class:: classref-method

:ref:`Array<class_Array>` **method_track_get_params** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the arguments values to be called on a method track for a given key in a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_remove_track:

.. rst-class:: classref-method

void **remove_track** **(** :ref:`int<class_int>` track_idx **)**

Removes a track by specifying the track index.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_find_key:

.. rst-class:: classref-method

:ref:`int<class_int>` **track_find_key** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`bool<class_bool>` exact=false **)** |const|

Finds the key index by time in a given track. Optionally, only find it if the exact time is given.

.. rst-class:: classref-item-separator

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.. _class_Animation_method_track_get_interpolation_loop_wrap:

.. rst-class:: classref-method

:ref:`bool<class_bool>` **track_get_interpolation_loop_wrap** **(** :ref:`int<class_int>` track_idx **)** |const|

Returns ``true`` if the track at ``idx`` wraps the interpolation loop. New tracks wrap the interpolation loop by default.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_get_interpolation_type:

.. rst-class:: classref-method

:ref:`InterpolationType<enum_Animation_InterpolationType>` **track_get_interpolation_type** **(** :ref:`int<class_int>` track_idx **)** |const|

Returns the interpolation type of a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_get_key_count:

.. rst-class:: classref-method

:ref:`int<class_int>` **track_get_key_count** **(** :ref:`int<class_int>` track_idx **)** |const|

Returns the amount of keys in a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_get_key_time:

.. rst-class:: classref-method

:ref:`float<class_float>` **track_get_key_time** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the time at which the key is located.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_get_key_transition:

.. rst-class:: classref-method

:ref:`float<class_float>` **track_get_key_transition** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the transition curve (easing) for a specific key (see the built-in math function :ref:`@GDScript.ease<class_@GDScript_method_ease>`).

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_get_key_value:

.. rst-class:: classref-method

:ref:`Variant<class_Variant>` **track_get_key_value** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)** |const|

Returns the value of a given key in a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_get_path:

.. rst-class:: classref-method

:ref:`NodePath<class_NodePath>` **track_get_path** **(** :ref:`int<class_int>` track_idx **)** |const|

Gets the path of a track. For more information on the path format, see :ref:`track_set_path<class_Animation_method_track_set_path>`.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_get_type:

.. rst-class:: classref-method

:ref:`TrackType<enum_Animation_TrackType>` **track_get_type** **(** :ref:`int<class_int>` track_idx **)** |const|

Gets the type of a track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_insert_key:

.. rst-class:: classref-method

void **track_insert_key** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`Variant<class_Variant>` key, :ref:`float<class_float>` transition=1 **)**

Insert a generic key in a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_is_enabled:

.. rst-class:: classref-method

:ref:`bool<class_bool>` **track_is_enabled** **(** :ref:`int<class_int>` track_idx **)** |const|

Returns ``true`` if the track at index ``idx`` is enabled.

.. rst-class:: classref-item-separator

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.. _class_Animation_method_track_is_imported:

.. rst-class:: classref-method

:ref:`bool<class_bool>` **track_is_imported** **(** :ref:`int<class_int>` track_idx **)** |const|

Returns ``true`` if the given track is imported. Else, return ``false``.

.. rst-class:: classref-item-separator

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.. _class_Animation_method_track_move_down:

.. rst-class:: classref-method

void **track_move_down** **(** :ref:`int<class_int>` track_idx **)**

Moves a track down.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_move_to:

.. rst-class:: classref-method

void **track_move_to** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` to_idx **)**

Changes the index position of track ``idx`` to the one defined in ``to_idx``.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_move_up:

.. rst-class:: classref-method

void **track_move_up** **(** :ref:`int<class_int>` track_idx **)**

Moves a track up.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_remove_key:

.. rst-class:: classref-method

void **track_remove_key** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx **)**

Removes a key by index in a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_remove_key_at_position:

.. rst-class:: classref-method

void **track_remove_key_at_position** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` position **)**

Removes a key by position (seconds) in a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_enabled:

.. rst-class:: classref-method

void **track_set_enabled** **(** :ref:`int<class_int>` track_idx, :ref:`bool<class_bool>` enabled **)**

Enables/disables the given track. Tracks are enabled by default.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_imported:

.. rst-class:: classref-method

void **track_set_imported** **(** :ref:`int<class_int>` track_idx, :ref:`bool<class_bool>` imported **)**

Sets the given track as imported or not.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_interpolation_loop_wrap:

.. rst-class:: classref-method

void **track_set_interpolation_loop_wrap** **(** :ref:`int<class_int>` track_idx, :ref:`bool<class_bool>` interpolation **)**

If ``true``, the track at ``idx`` wraps the interpolation loop.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_interpolation_type:

.. rst-class:: classref-method

void **track_set_interpolation_type** **(** :ref:`int<class_int>` track_idx, :ref:`InterpolationType<enum_Animation_InterpolationType>` interpolation **)**

Sets the interpolation type of a given track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_key_time:

.. rst-class:: classref-method

void **track_set_key_time** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` time **)**

Sets the time of an existing key.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_key_transition:

.. rst-class:: classref-method

void **track_set_key_transition** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key_idx, :ref:`float<class_float>` transition **)**

Sets the transition curve (easing) for a specific key (see the built-in math function :ref:`@GDScript.ease<class_@GDScript_method_ease>`).

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_key_value:

.. rst-class:: classref-method

void **track_set_key_value** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` key, :ref:`Variant<class_Variant>` value **)**

Sets the value of an existing key.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_set_path:

.. rst-class:: classref-method

void **track_set_path** **(** :ref:`int<class_int>` track_idx, :ref:`NodePath<class_NodePath>` path **)**

Sets the path of a track. Paths must be valid scene-tree paths to a node and must be specified starting from the parent node of the node that will reproduce the animation. Tracks that control properties or bones must append their name after the path, separated by ``":"``.

For example, ``"character/skeleton:ankle"`` or ``"character/mesh:transform/local"``.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_track_swap:

.. rst-class:: classref-method

void **track_swap** **(** :ref:`int<class_int>` track_idx, :ref:`int<class_int>` with_idx **)**

Swaps the track ``idx``'s index position with the track ``with_idx``.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_transform_track_insert_key:

.. rst-class:: classref-method

:ref:`int<class_int>` **transform_track_insert_key** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time, :ref:`Vector3<class_Vector3>` location, :ref:`Quat<class_Quat>` rotation, :ref:`Vector3<class_Vector3>` scale **)**

Insert a transform key for a transform track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_transform_track_interpolate:

.. rst-class:: classref-method

:ref:`Array<class_Array>` **transform_track_interpolate** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec **)** |const|

Returns the interpolated value of a transform track at a given time (in seconds). An array consisting of 3 elements: position (:ref:`Vector3<class_Vector3>`), rotation (:ref:`Quat<class_Quat>`) and scale (:ref:`Vector3<class_Vector3>`).

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_value_track_get_key_indices:

.. rst-class:: classref-method

:ref:`PoolIntArray<class_PoolIntArray>` **value_track_get_key_indices** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec, :ref:`float<class_float>` delta **)** |const|

Returns all the key indices of a value track, given a position and delta time.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_value_track_get_update_mode:

.. rst-class:: classref-method

:ref:`UpdateMode<enum_Animation_UpdateMode>` **value_track_get_update_mode** **(** :ref:`int<class_int>` track_idx **)** |const|

Returns the update mode of a value track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_value_track_interpolate:

.. rst-class:: classref-method

:ref:`Variant<class_Variant>` **value_track_interpolate** **(** :ref:`int<class_int>` track_idx, :ref:`float<class_float>` time_sec **)** |const|

Returns the interpolated value at the given time (in seconds). The ``track_idx`` must be the index of a value track.

.. rst-class:: classref-item-separator

----

.. _class_Animation_method_value_track_set_update_mode:

.. rst-class:: classref-method

void **value_track_set_update_mode** **(** :ref:`int<class_int>` track_idx, :ref:`UpdateMode<enum_Animation_UpdateMode>` mode **)**

Sets the update mode (see :ref:`UpdateMode<enum_Animation_UpdateMode>`) of a value track.

.. |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.)`
.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`