Unity Timeline

https://docs.unity3d.com/Packages/com.unity.timeline@1.8/
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Unity Timeline is a tool for creating cinematic content, gameplay sequences, audio sequences, and...
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### Play()

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.TimelinePlaybackControls.html

Starts playback.

```APIDOC
## Play()

### Description
Starts playback.

### Method
Play

### Signature
public void Play()

### Exceptions
- **InvalidOperationException** - The Window associated with this instance has been destroyed.
```

--------------------------------

### SampleClipAction example

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.ClipAction.html

Example of a simple clip action with context menu and shortcut support. The MenuEntry attribute adds it to the Timeline context menu, and the TimelineShortcut attribute registers a keyboard shortcut (KeyCode.K) that invokes the action on selected clips.

```csharp
[MenuEntry("Custom Actions/Sample clip Action")]
public class SampleClipAction : ClipAction
{
    public override ActionValidity Validate(IEnumerable<TimelineClip> clip)
    {
        return ActionValidity.Valid;
    }
public override bool Execute(IEnumerable<TimelineClip> items)
{
    Debug.Log("Test Action");
    return true;
}

[TimelineShortcut("SampleClipAction", KeyCode.K)]
public static void HandleShortCut(ShortcutArguments args)
{
    Invoker.InvokeWithSelectedClips<SampleClipAction>();
}

}
```

--------------------------------

### TimelineClip.start

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.TimelineClip.html

Gets or sets the start time, in seconds, of the clip.

```APIDOC
## TimelineClip.start

### Description
The start time, in seconds, of the clip.

### Declaration
```csharp
public double start { get; set; }
```

### Property Value
| Type | Description |
|------|-------------|
| double | The start time in seconds. |
```

--------------------------------

### ActivationControlPlayable.OnGraphStart

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.ActivationControlPlayable.html

Callback invoked when the owning PlayableGraph starts.

```APIDOC
## ActivationControlPlayable.OnGraphStart(Playable)

### Description
This function is called when the PlayableGraph that owns this PlayableBehaviour starts.

### Method
OnGraphStart

### Signature
`public override void OnGraphStart(Playable playable)`

### Parameters
- **playable** (Playable) - Required - The playable this behaviour is attached to.
```

--------------------------------

### Simple Timeline Action example with context menu and shortcut

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.TimelineAction.html

Example of a simple timeline action that inherits from TimelineAction, with a menu entry and a shortcut handler. The Execute method logs a message and returns true, and the Validate method returns ActionValidity.Valid.

```csharp
[MenuEntry("Custom Actions/Sample Timeline Action")]
public class SampleTimelineAction : TimelineAction
{
    public override ActionValidity Validate(ActionContext context)
    {
        return ActionValidity.Valid;
    }
public override bool Execute(ActionContext context)
{
    Debug.Log("Test Action");
    return true;
}

[TimelineShortcut("SampleTimelineAction", KeyCode.Q)]
public static void HandleShortCut(ShortcutArguments args)
{
    Invoker.InvokeWithSelected<SampleTimelineAction>();
}

}
```

--------------------------------

### ActivationControlPlayable.OnBehaviourPlay

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.ActivationControlPlayable.html

Callback invoked when the playable starts playing.

```APIDOC
## ActivationControlPlayable.OnBehaviourPlay(Playable, FrameData)

### Description
This function is called when the Playable play state is changed to Playables.PlayState.Playing.

### Method
OnBehaviourPlay

### Signature
`public override void OnBehaviourPlay(Playable playable, FrameData info)`

### Parameters
- **playable** (Playable) - Required - The playable this behaviour is attached to.
- **info** (FrameData) - Required - The information about this frame
```

--------------------------------

### Simple track Action example with ApplyDefaultUndo

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.ApplyDefaultUndoAttribute.html

Example of a TrackAction class using the ApplyDefaultUndo attribute. The Execute method sets the track name to its type name and returns true. The attribute automatically records the track objects for undo.

```csharp
[ApplyDefaultUndo]
public class SetNameToTypeAction : TrackAction
{
    public override ActionValidity Validate(IEnumerable<TrackAsset> items)
    {
        return ActionValidity.Valid;
    }
public override bool Execute(IEnumerable<TrackAsset> items)
{
    foreach (TrackAsset track in items)
        track.name = track.GetType().Name;
    return true;
}

}
```

--------------------------------

### TimeNotificationBehaviour.OnGraphStart(Playable)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.TimeNotificationBehaviour.html

This method is called when the PlayableGraph that owns this PlayableBehaviour starts.

```APIDOC
## TimeNotificationBehaviour.OnGraphStart(Playable)

### Description
This method is called when the PlayableGraph that owns this PlayableBehaviour starts.

### Declaration
```csharp
public override void OnGraphStart(Playable playable)
```

### Parameters
| Type | Name | Description |
| --- | --- | --- |
| Playable | playable | The reference to the playable associated with this PlayableBehaviour. |

### Overrides
PlayableBehaviour.OnGraphStart(Playable)

### See Also
NotificationFlags
```

--------------------------------

### ApplyDefaultUndoAttribute

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.ApplyDefaultUndoAttribute.html

Documentation for the ApplyDefaultUndoAttribute class, including its constructor, field, and usage example.

```APIDOC
## ApplyDefaultUndoAttribute

### Description
Use this attribute on action classes (TimelineAction, ClipAction, MarkerAction and TrackAction) to have the default undo behaviour applied. By default, applying this attribute will record all objects passed to the Execute method with the Undo system, using the name of Action it is applied to.

### Namespace
UnityEditor.Timeline.Actions

### Assembly
Unity.Timeline.Editor.dll

### Syntax
```
[AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
public class ApplyDefaultUndoAttribute : Attribute, _Attribute
```

### Constructors

#### ApplyDefaultUndoAttribute(string)
Use this attribute on action classes to have the default undo behaviour applied.

##### Declaration
```
public ApplyDefaultUndoAttribute(string undoTitle = null)
```

##### Parameters
- **undoTitle** (string) - The title of the action to appear in the undo history.

### Fields

#### UndoTitle
The title of the action to appear in the undo history. If not specified, the name is taken from the DisplayName attribute, or derived from the name of the class this attribute is applied to.

##### Declaration
```
public string UndoTitle
```

##### Field Value
- **string** - The title of the action.

### Examples
Simple track Action example (with context menu and shortcut support).
```
[ApplyDefaultUndo]
public class SetNameToTypeAction : TrackAction
{
    public override ActionValidity Validate(IEnumerable<TrackAsset> items)
    {
        return ActionValidity.Valid;
    }
    public override bool Execute(IEnumerable<TrackAsset> items)
    {
        foreach (TrackAsset track in items)
            track.name = track.GetType().Name;
        return true;
    }
}
```
```

--------------------------------

### TrackBindingTypeAttribute usage example

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.TrackBindingTypeAttribute.html

Example usage of TrackBindingTypeAttribute on a custom track class. It specifies that the track binds to a Light component and allows the component to be created automatically.

```csharp
[TrackBindingType(typeof(Light), TrackBindingFlags.AllowCreateComponent)]
public class LightTrack : TrackAsset { }
```

--------------------------------

### SampleMarkerAction with menu and shortcut

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.MarkerAction.html

Example marker action with a MenuEntry attribute and a TimelineShortcut. Validate returns Valid)Skip, Execute logs a message, and the shortcut handler is registered with KeyCode.L.

```csharp
[MenuEntry("Custom Actions/Sample marker Action")]
public class SampleMarkerAction : MarkerAction
{
    public override ActionValidity Validate(IEnumerable<IMarker> markers)
    {
        return ActionValidity.Valid;
    }
public override bool Execute(IEnumerable<IMarker> items)
{
    Debug.Log("Test Action");
    return true;
}

[TimelineShortcut("SampleMarkerAction", KeyCode.L)]
public static void HandleShortCut(ShortcutArguments args)
{
    Invoker.InvokeWithSelectedMarkers<SampleMarkerAction>();
}

}
```

--------------------------------

### SampleTrackAction with menu and shortcut

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.TrackAction.html

Shows a complete track action with a context menu entry, a shortcut (KeyCode.H), and the required Validate and Execute overrides. The shortcut handler uses Invoker.InvokeWithSelectedTracks to run the action on selected tracks.

```csharp
[MenuEntry("Custom Actions/Sample track Action")]
public class SampleTrackAction : TrackAction
{
    public override ActionValidity Validate(IEnumerable<TrackAsset> tracks)
    {
        return ActionValidity.Valid;
    }
public override bool Execute(IEnumerable<TrackAsset> tracks)
{
    Debug.Log("Test Action");
    return true;
}

[TimelineShortcut("SampleTrackAction", KeyCode.H)]
public static void HandleShortCut(ShortcutArguments args)
{
    Invoker.InvokeWithSelectedTracks<SampleTrackAction>();
}

}
```

--------------------------------

### MenuEntryAttribute usage examples

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.MenuEntryAttribute.html

Shows three example TimelineAction classes using MenuEntryAttribute: a simple menu action, one with a priority of 9999, and one that creates a submenu via a slash in the path. Each overrides Validate and Execute.

```csharp
[MenuEntry("Simple Menu Action")]
class SimpleMenuAction : TimelineAction
{
    public override ActionValidity Validate(ActionContext actionContext)
    {
        return ActionValidity.Valid;
    }

    public override bool Execute(ActionContext actionContext)
    {
        return true;
    }
}

[MenuEntry("Menu Action with priority", 9999)]
class MenuActionWithPriority : TimelineAction
{
    public override ActionValidity Validate(ActionContext actionContext)
    {
        return ActionValidity.Valid;
    }

    public override bool Execute(ActionContext actionContext)
    {
        return true;
    }
}

[MenuEntry("My Menu/Menu Action inside submenu")]
class MenuActionInsideSubMenu : TimelineAction
{
    public override ActionValidity Validate(ActionContext actionContext)
    {
        return ActionValidity.Valid;
    }

    public override bool Execute(ActionContext actionContext)
    {
        return true;
    }
}
```

--------------------------------

### GetRegisteredSignals()

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.SignalReceiver.html

Gets a list of all registered SignalAssets.

```APIDOC
## GetRegisteredSignals()

### Description
Gets a list of all registered SignalAssets.

### Method
GetRegisteredSignals

### Signature
public IEnumerable<SignalAsset> GetRegisteredSignals()

### Returns
- **IEnumerable<SignalAsset>** - Returns a list of SignalAssets.

### See Also
- SignalEmitter
- SignalAsset
```

--------------------------------

### Initialize(GameObject, Transform)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.PrefabControlPlayable.html

Initializes the behaviour with a prefab and parent transform.

```APIDOC
## Initialize(GameObject, Transform)

### Description
Initializes the behaviour with a prefab and parent transform.

### Method
Initialize

### Signature
public GameObject Initialize(GameObject prefabGameObject, Transform parentTransform)

### Parameters
- **prefabGameObject** (GameObject) - Required - The prefab to instantiate from.
- **parentTransform** (Transform) - Required - Transform to parent instance to. Can be null.

### Returns
- **GameObject** - The created instance.
```

--------------------------------

### Marker.parent

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.Marker.html

Gets the track that contains the marker.

```APIDOC
## Marker.parent

### Description
Gets the track that contains the marker.

### Declaration
```csharp
public TrackAsset parent { get; }
```

### Property Value
| Type | Description |
|------|-------------|
| TrackAsset | The track that contains the marker. |
```

--------------------------------

### StartRecording(AnimationTrack)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.AnimationTrackExtensions.html

Extension method to enable animation recording on an AnimationTrack.

```APIDOC
## StartRecording(AnimationTrack)

### Description
Method that enables animation recording for an AnimationTrack.

### Method
StartRecording

### Signature
`public static bool StartRecording(this AnimationTrack track)`

### Parameters
- **track** (AnimationTrack) - The AnimationTrack which will be put in recording mode.

### Returns
- **bool** - True if track was put successfully in recording mode, False otherwise.
```

--------------------------------

### Create(PlayableGraph, GameObject, Transform)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.PrefabControlPlayable.html

Creates a Playable with a PrefabControlPlayable behaviour attached.

```APIDOC
## Create(PlayableGraph, GameObject, Transform)

### Description
Creates a Playable with a PrefabControlPlayable behaviour attached.

### Method
Create

### Signature
public static ScriptPlayable<PrefabControlPlayable> Create(PlayableGraph graph, GameObject prefabGameObject, Transform parentTransform)

### Parameters
- **graph** (PlayableGraph) - Required - The PlayableGraph to inject the Playable into.
- **prefabGameObject** (GameObject) - Required - The prefab to instantiate from.
- **parentTransform** (Transform) - Required - Transform to parent instance to. Can be null.

### Returns
- **ScriptPlayable<PrefabControlPlayable>** - Returns a Playable with PrefabControlPlayable behaviour attached.
```

--------------------------------

### ActivationControlPlayable.Create

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.ActivationControlPlayable.html

Static factory method to create an ActivationControlPlayable playable.

```APIDOC
## ActivationControlPlayable.Create(PlayableGraph, GameObject, PostPlaybackState)

### Description
Creates a ScriptPlayable with an ActivationControlPlayable behaviour attached.

### Method
Create

### Signature
`public static ScriptPlayable<ActivationControlPlayable> Create(PlayableGraph graph, GameObject gameObject, ActivationControlPlayable.PostPlaybackState postPlaybackState)`

### Parameters
- **graph** (PlayableGraph) - Required - PlayableGraph that will own the playable
- **gameObject** (GameObject) - Required - The GameObject that triggered the graph build
- **postPlaybackState** (ActivationControlPlayable.PostPlaybackState) - Required - The state to leave the gameObject after the graph is stopped

### Returns
- **ScriptPlayable<ActivationControlPlayable>** - Returns a playable that controls activation of a game object
```

--------------------------------

### TimelineClip.timeScale

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.TimelineClip.html

Gets or sets a speed multiplier for the clip.

```APIDOC
## TimelineClip.timeScale

### Description
A speed multiplier for the clip.

### Declaration
```csharp
public double timeScale { get; set; }
```

### Property Value
| Type | Description |
|------|-------------|
| double | The speed multiplier. |
```

--------------------------------

### GetRootTracks()

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.TimelineAsset.html

Gets an enumerable list of all root tracks.

```APIDOC
## GetRootTracks()

### Description
Get an enumerable list of all root tracks.

### Declaration
```
public IEnumerable<TrackAsset> GetRootTracks()
```

### Returns
- **IEnumerable<TrackAsset>** - An IEnumerable of all root tracks.

### Remarks
A root track refers to all tracks that occur at the root of the timeline. These are the outmost level GroupTracks, and output tracks that do not belong to any group.
```

--------------------------------

### GetOutputTracks()

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.TimelineAsset.html

Gets a list of all output tracks in the Timeline.

```APIDOC
## GetOutputTracks()

### Description
Gets a list of all output tracks in the Timeline.

### Declaration
```
public IEnumerable<TrackAsset> GetOutputTracks()
```

### Returns
- **IEnumerable<TrackAsset>** - An IEnumerable of all output tracks.

### Remarks
An output track is a track that generates a PlayableOutput. In general, an output track is any track that is not a GroupTrack or subtrack.
```

--------------------------------

### TimelineShortcutAttribute(string, KeyCode, ShortcutModifiers)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.TimelineShortcutAttribute.html

Documentation for the TimelineShortcutAttribute constructor, including its declaration, parameters, and an example usage.

```APIDOC
## TimelineShortcutAttribute Constructor

### Description
Initializes a new instance of the TimelineShortcutAttribute class with the specified shortcut ID, default key code, and default shortcut modifiers.

### Declaration
```csharp
public TimelineShortcutAttribute(string id, KeyCode defaultKeyCode, ShortcutModifiers defaultShortcutModifiers = ShortcutModifiers.None)
```

### Parameters
- **id** (string) - Required - Id to register the shortcut. It will automatically be prefixed by 'Timeline/' in order to be in the 'Timeline' section of the shortcut manager.
- **defaultKeyCode** (KeyCode) - Required - Optional key code for default binding.
- **defaultShortcutModifiers** (ShortcutModifiers) - Optional - Optional shortcut modifiers for default binding. Default value is ShortcutModifiers.None.

### Example
```csharp
[TimelineShortcut("Test Action", KeyCode.K, ShortcutModifiers.Shift | ShortcutModifiers.Alt)]
public static void HandleShortCut(ShortcutArguments args)
{
    Invoker.InvokeWithSelected<ShortcutAction>();
}
```
```

--------------------------------

### OnCreate(TimelineClip, TrackAsset, TimelineClip)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.ClipEditor.html

Documentation for the OnCreate method of the ClipEditor class, which is called when a clip is created.

```APIDOC
## OnCreate(TimelineClip, TrackAsset, TimelineClip)

### Description
Called when a clip is created. The callback occurs before the clip is assigned to the track.

### Declaration
```csharp
public virtual void OnCreate(TimelineClip clip, TrackAsset track, TimelineClip clonedFrom)
```

### Parameters
- **clip** (TimelineClip) - The newly created clip.
- **track** (TrackAsset) - The track that the clip is assigned to.
- **clonedFrom** (TimelineClip) - The source that the clip was copied from. This can be set to null if the clip is not a copy.

### Remarks
The callback occurs before the clip is assigned to the track.
```

--------------------------------

### GetSignalAssetAtIndex(int)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.SignalReceiver.html

Gets the SignalAsset at a specific index.

```APIDOC
## GetSignalAssetAtIndex(int)

### Description
Gets the SignalAsset at a specific index.

### Method
GetSignalAssetAtIndex

### Signature
public SignalAsset GetSignalAssetAtIndex(int idx)

### Parameters
- **idx** (int) - The index of the SignalAsset.

### Returns
- **SignalAsset** - Returns a SignalAsset.

### See Also
- SignalEmitter
- SignalAsset
```

--------------------------------

### OnCreate(TrackAsset, TrackAsset)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.TrackEditor.html

Callback invoked when a track is created, with an optional source track if it was copied.

```APIDOC
## OnCreate(TrackAsset, TrackAsset)

### Description
Callback for when a track is created.

### Method
public virtual void OnCreate(TrackAsset track, TrackAsset copiedFrom)

### Parameters
- **track** (TrackAsset) - The track that is created.
- **copiedFrom** (TrackAsset) - The source that the track is copied from. This can be set to null if the track is not a copy.
```

--------------------------------

### GetReactionAtIndex(int)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.SignalReceiver.html

Gets the reaction at a specific index.

```APIDOC
## GetReactionAtIndex(int)

### Description
Gets the reaction at a specific index.

### Declaration
public UnityEvent GetReactionAtIndex(int idx)

### Parameters
- **idx** (int) - The index of the reaction.

### Returns
- **UnityEvent** - Returns a reaction.

### See Also
SignalEmitter, SignalAsset
```

--------------------------------

### GetTrackColor(TrackAsset)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.TrackEditor.html

Gets the color information of a track.

```APIDOC
## GetTrackColor(TrackAsset)

### Description
Gets the color information of a track.

### Method
public Color GetTrackColor(TrackAsset track)

### Parameters
- **track** (TrackAsset) - The track to get the color of.

### Returns
- **Color** - Returns the color for the specified track.
```

--------------------------------

### Create(PlayableGraph, IEnumerable<TrackAsset>, GameObject, bool, bool)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.TimelinePlayable.html

Creates an instance of a Timeline by compiling the provided tracks into a playable graph.

```APIDOC
## Create(PlayableGraph, IEnumerable<TrackAsset>, GameObject, bool, bool)

### Description
Creates an instance of a Timeline.

### Method
Create

### Signature
public static ScriptPlayable<TimelinePlayable> Create(PlayableGraph graph, IEnumerable<TrackAsset> tracks, GameObject go, bool autoRebalance, bool createOutputs)

### Parameters
- **graph** (PlayableGraph) - The playable graph to inject the timeline.
- **tracks** (IEnumerable<TrackAsset>) - The list of tracks to compile.
- **go** (GameObject) - The GameObject that initiated the compilation.
- **autoRebalance** (bool) - In the editor, whether the graph should account for the possibility of changing clip times.
- **createOutputs** (bool) - Whether to create PlayableOutputs in the graph.

### Returns
- **ScriptPlayable<TimelinePlayable>** - A subgraph with the playable containing a TimelinePlayable behaviour as the root.
```

--------------------------------

### OnPlayableCreate(Playable)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.BasicPlayableBehaviour.html

Callback invoked when the owning Playable is created.

```APIDOC
## OnPlayableCreate(Playable)

### Description
This function is called when the Playable that owns the PlayableBehaviour is created.

### Declaration
```csharp
public virtual void OnPlayableCreate(Playable playable)
```

### Parameters
- **playable** (Playable) - The Playable that owns the current PlayableBehaviour.
```

--------------------------------

### MenuPriority.CustomTimelineActionSection

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEditor.Timeline.Actions.MenuPriority.CustomTimelineActionSection.html

Documentation for the MenuPriority.CustomTimelineActionSection class, including its start field.

```APIDOC
## Class MenuPriority.CustomTimelineActionSection

### Description
Priorities for custom Timeline action menu items.

### Namespace
UnityEditor.Timeline.Actions

### Assembly
Unity.Timeline.Editor.dll

### Syntax
```csharp
public static class MenuPriority.CustomTimelineActionSection
```

### Fields

#### start
First custom Timeline action menu item priority.

##### Declaration
```csharp
public const int start = 7000
```

##### Field Value
| Type | Description |
| --- | --- |
| int | The priority value. |

```

--------------------------------

### DirectorControlPlayable.Create(PlayableGraph, PlayableDirector)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.DirectorControlPlayable.html

Creates a Playable with a DirectorControlPlayable attached.

```APIDOC
## Create(PlayableGraph, PlayableDirector)

### Description
Creates a Playable with a DirectorControlPlayable attached.

### Method
Create

### Parameters
- **graph** (PlayableGraph) - Required - The graph to inject the playable into
- **director** (PlayableDirector) - Required - The director to control

### Returns
- **ScriptPlayable<DirectorControlPlayable>** - Returns a Playable with a DirectorControlPlayable attached
```

--------------------------------

### GetReaction(SignalAsset)

Source: https://docs.unity3d.com/Packages/com.unity.timeline%401.8/api/UnityEngine.Timeline.SignalReceiver.html

Gets the first UnityEvent associated with a SignalAsset.

```APIDOC
## GetReaction(SignalAsset)

### Description
Gets the first UnityEvent associated with a SignalAsset.

### Declaration
public UnityEvent GetReaction(SignalAsset key)

### Parameters
- **key** (SignalAsset) - A SignalAsset defining the signal.

### Returns
- **UnityEvent** - Returns the reaction associated with a SignalAsset. Returns null if the signal asset does not exist.

### See Also
SignalEmitter, SignalAsset
```
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