italink/unrealclientprotocol/unreal-actor-editing

Name: unreal-actor-editing
Author: italink

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Manage actors in UE levels via UCP. Use when the user asks to spawn, delete, move, duplicate, select, or otherwise manipulate actors in the Unreal Engine editor.

Install

npx vskill@latest install italink/unrealclientprotocol/unreal-actor-editing

SKILL.md

Unreal Actor Editing

Manage actors in Unreal Engine levels through UCP's call command. This skill guides you to use engine-provided actor subsystems and libraries.

Prerequisite: The unreal-client-protocol skill must be available and the UE editor must be running with the UCP plugin enabled.

Engine Built-in Actor Libraries

UEditorActorSubsystem

CDO Path: /Script/UnrealEd.Default__EditorActorSubsystem

This is the primary API for actor manipulation in the editor:

Function	Description
`GetAllLevelActors()`	Get all actors in the current level
`GetAllLevelActorsOfClass(ActorClass)`	Get all actors of a specific class
`GetSelectedLevelActors()`	Get currently selected actors
`SetSelectedLevelActors(ActorsToSelect)`	Set actor selection
`SelectNothing()`	Deselect all actors
`SpawnActorFromClass(ActorClass, Location, Rotation)`	Spawn a new actor
`SpawnActorFromObject(ObjectToUse, Location, Rotation)`	Spawn from an existing asset
`DuplicateActor(ActorToDuplicate, ToWorld, Offset)`	Duplicate an actor
`DuplicateActors(ActorsToDuplicate, ToWorld, Offset)`	Duplicate multiple actors
`DestroyActor(ActorToDestroy)`	Delete an actor
`DestroyActors(ActorsToDestroy)`	Delete multiple actors
`SetActorTransform(Actor, WorldTransform)`	Set actor transform
`ConvertActors(Actors, ActorClass)`	Convert actors to a different class

Examples

Get all actors in level:

json

{"object":"/Script/UnrealEd.Default__EditorActorSubsystem","function":"GetAllLevelActors"}

Get all static mesh actors:

json

{"object":"/Script/UnrealEd.Default__EditorActorSubsystem","function":"GetAllLevelActorsOfClass","params":{"ActorClass":"/Script/Engine.StaticMeshActor"}}

Spawn a point light:

json

{"object":"/Script/UnrealEd.Default__EditorActorSubsystem","function":"SpawnActorFromClass","params":{"ActorClass":"/Script/Engine.PointLight","Location":{"X":0,"Y":0,"Z":200}}}

Destroy an actor:

json

{"object":"/Script/UnrealEd.Default__EditorActorSubsystem","function":"DestroyActor","params":{"ActorToDestroy":"/Game/Maps/Main.Main:PersistentLevel.PointLight_0"}}

UGameplayStatics

CDO Path: /Script/Engine.Default__GameplayStatics

Useful for runtime/game queries:

Function	Description
`GetAllActorsOfClass(WorldContextObject, ActorClass)`	Find actors by class
`GetAllActorsWithTag(WorldContextObject, Tag)`	Find actors by tag
`GetAllActorsOfClassWithTag(WorldContextObject, ActorClass, Tag)`	Combined class + tag filter
`GetAllActorsWithInterface(WorldContextObject, Interface)`	Find actors implementing an interface
`GetActorOfClass(WorldContextObject, ActorClass)`	Get first actor of class
`FindNearestActor(WorldContextObject, Origin, ActorClass)`	Find nearest actor of class to a location
`GetActorArrayAverageLocation(Actors)`	Get average location of an array of actors
`GetActorArrayBounds(Actors, bOnlyCollidingComponents)`	Get combined bounds of an array of actors
`GetPlayerPawn(WorldContextObject, PlayerIndex)`	Get player pawn
`GetPlayerController(WorldContextObject, PlayerIndex)`	Get player controller
`GetPlayerCameraManager(WorldContextObject, PlayerIndex)`	Get camera manager

UEditorLevelLibrary

CDO Path: /Script/EditorScriptingUtilities.Default__EditorLevelLibrary

Unique level editing functions not covered by UEditorActorSubsystem:

Function	Description
`JoinStaticMeshActors(ActorsToJoin, JoinOptions)`	Merge static meshes into one
`ReplaceSelectedActors(InAssetPath)`	Replace selected actors with given asset
`GetPIEWorlds()`	Get worlds from Play-In-Editor sessions

Layer Management (ULayersSubsystem)

Get the instance via FindObjectInstances with ClassName set to /Script/UnrealEd.LayersSubsystem.

Function	Description
`CreateLayer(LayerName)`	Create a new layer
`DeleteLayer(LayerToDelete)`	Delete a layer
`RenameLayer(OriginalLayerName, NewLayerName)`	Rename a layer
`AddActorToLayer(Actor, LayerName)`	Add a single actor to a layer
`RemoveActorFromLayer(Actor, LayerName)`	Remove a single actor from a layer
`AddActorsToLayer(Actors, LayerName)`	Add multiple actors to a layer
`GetActorsFromLayer(LayerName)`	Get all actors in a layer
`SetLayerVisibility(LayerName, bIsVisible)`	Show/hide a layer
`SelectActorsInLayer(LayerName)`	Select all actors in a layer
`AddAllLayerNamesTo(OutLayers)`	Get all layer names

Examples

Find the LayersSubsystem instance:

json

{"object":"/Script/UnrealClientProtocol.Default__ObjectOperationLibrary","function":"FindObjectInstances","params":{"ClassName":"/Script/UnrealEd.LayersSubsystem"}}

Create a layer (use the instance path returned above):

json

{"object":"<layers_subsystem_instance_path>","function":"CreateLayer","params":{"LayerName":"Lighting"}}

Add an actor to a layer:

json

{"object":"<layers_subsystem_instance_path>","function":"AddActorToLayer","params":{"Actor":"/Game/Maps/Main.Main:PersistentLevel.PointLight_0","LayerName":"Lighting"}}

Actor Grouping (UActorGroupingUtils)

Get the CDO at /Script/UnrealEd.Default__ActorGroupingUtils, then call Get() on it to obtain the singleton instance.

Function	Description
`GroupActors(Actors)`	Group specified actors
`UngroupActors(Actors)`	Ungroup specified actors
`GroupSelected()`	Group currently selected actors
`UngroupSelected()`	Ungroup currently selected actors
`LockSelectedGroups()`	Lock selected groups
`UnlockSelectedGroups()`	Unlock selected groups
`CanGroupActors()`	Check if current selection can be grouped

Examples

Get the grouping utils instance:

json

{"object":"/Script/UnrealEd.Default__ActorGroupingUtils","function":"Get"}

Group selected actors (use the instance returned by Get):

json

{"object":"<actor_grouping_utils_instance_path>","function":"GroupSelected"}

Actor Folders (on Actor instances)

Functions called directly on actor instance paths:

Function	Description
`GetFolderPath()`	Get the actor's folder path in the outliner
`SetFolderPath(NewFolderPath)`	Set the actor's folder path in the outliner

Examples

Get an actor's folder:

json

{"object":"/Game/Maps/Main.Main:PersistentLevel.PointLight_0","function":"GetFolderPath"}

Move an actor into a folder:

json

{"object":"/Game/Maps/Main.Main:PersistentLevel.PointLight_0","function":"SetFolderPath","params":{"NewFolderPath":"Lighting/Dynamic"}}

Actor Attachment (on Actor instances)

Functions called directly on actor instance paths:

Function	Description
`K2_AttachToActor(ParentActor, SocketName, LocationRule, RotationRule, ScaleRule, bWeldSimulatedBodies)`	Attach this actor to a parent actor
`K2_DetachFromActor(LocationRule, RotationRule, ScaleRule)`	Detach this actor from its parent

Rules are EAttachmentRule values: KeepRelative, KeepWorld, SnapToTarget.

Examples

Attach an actor to another:

json

{"object":"/Game/Maps/Main.Main:PersistentLevel.Cube_0","function":"K2_AttachToActor","params":{"ParentActor":"/Game/Maps/Main.Main:PersistentLevel.Sphere_0","SocketName":"None","LocationRule":"KeepWorld","RotationRule":"KeepWorld","ScaleRule":"KeepWorld","bWeldSimulatedBodies":false}}

Detach an actor:

json

{"object":"/Game/Maps/Main.Main:PersistentLevel.Cube_0","function":"K2_DetachFromActor","params":{"LocationRule":"KeepWorld","RotationRule":"KeepWorld","ScaleRule":"KeepWorld"}}

Level Management (ULevelEditorSubsystem + UEditorLevelUtils)

ULevelEditorSubsystem

Get the instance via FindObjectInstances with ClassName set to /Script/LevelEditor.LevelEditorSubsystem.

Function	Description
`NewLevel(AssetPath)`	Create a new level
`NewLevelFromTemplate(AssetPath, TemplatePath)`	Create a new level from template
`LoadLevel(AssetPath)`	Load a level
`SaveCurrentLevel()`	Save the current level
`SaveAllDirtyLevels()`	Save all modified levels
`SetCurrentLevelByName(LevelName)`	Switch current level
`GetCurrentLevel()`	Get the current level
`PilotLevelActor(ActorToPilot)`	Pilot an actor in the viewport
`EjectPilotLevelActor()`	Stop piloting an actor

Examples

Find the LevelEditorSubsystem instance:

json

{"object":"/Script/UnrealClientProtocol.Default__ObjectOperationLibrary","function":"FindObjectInstances","params":{"ClassName":"/Script/LevelEditor.LevelEditorSubsystem"}}

Save the current level:

json

{"object":"<level_editor_subsystem_instance_path>","function":"SaveCurrentLevel"}

UEditorLevelUtils

CDO Path: /Script/UnrealEd.Default__EditorLevelUtils

Function	Description
`CreateNewStreamingLevel(LevelStreamingClass, NewLevelPath, bMoveSelectedActors)`	Create a new streaming level
`MoveActorsToLevel(ActorsToMove, DestLevel, bWarnAboutReferences, bWarnAboutRenaming)`	Move actors to another level
`K2_AddLevelToWorld(World, LevelPath, LevelStreamingClass)`	Add a sub-level to the world
`K2_RemoveLevelFromWorld(Level)`	Remove a sub-level from the world
`SetLevelVisibility(Level, bShouldBeVisible, bForceLayersVisible)`	Show/hide a level
`GetLevels(World)`	Get all levels in a world

Viewport & Camera (UUnrealEditorSubsystem)

Get the instance via FindObjectInstances with ClassName set to /Script/UnrealEd.UnrealEditorSubsystem.

Function	Description
`GetLevelViewportCameraInfo(OutCameraLocation, OutCameraRotation)`	Get the viewport camera position and rotation
`SetLevelViewportCameraInfo(CameraLocation, CameraRotation)`	Set the viewport camera position and rotation
`GetEditorWorld()`	Get the current editor world
`ScreenToWorld(ScreenPosition)`	Convert screen coordinates to world coordinates
`WorldToScreen(WorldPosition)`	Convert world coordinates to screen coordinates

Also available via UEditorUtilityLibrary:

CDO Path: /Script/Blutility.Default__EditorUtilityLibrary

Function	Description
`GetSelectionBounds(Origin, BoxExtent, SphereRadius)`	Get bounding info of the current selection

Examples

Find the UnrealEditorSubsystem instance:

json

{"object":"/Script/UnrealClientProtocol.Default__ObjectOperationLibrary","function":"FindObjectInstances","params":{"ClassName":"/Script/UnrealEd.UnrealEditorSubsystem"}}

Get viewport camera info:

json

{"object":"<unreal_editor_subsystem_instance_path>","function":"GetLevelViewportCameraInfo"}

Set viewport camera position:

json

{"object":"<unreal_editor_subsystem_instance_path>","function":"SetLevelViewportCameraInfo","params":{"CameraLocation":{"X":0,"Y":0,"Z":500},"CameraRotation":{"Pitch":-45,"Yaw":0,"Roll":0}}}

Get selection bounds:

json

{"object":"/Script/Blutility.Default__EditorUtilityLibrary","function":"GetSelectionBounds"}

Common Patterns

Discover and inspect actors

First get all actors, then inspect a specific actor (run as separate calls):

json

{"object":"/Script/UnrealEd.Default__EditorActorSubsystem","function":"GetAllLevelActors"}

json

{"object":"/Script/UnrealClientProtocol.Default__ObjectOperationLibrary","function":"GetObjectProperty","params":{"ObjectPath":"<actor_path>","PropertyName":"RelativeLocation"}}

Move an actor

Use the unreal-object-operation skill to set properties on the actor's root component:

This is the start of the file. Read the full SKILL.md on GitHub.

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Source

SKILL.md in the repositoryCheckingSkills/unreal-actor-editing/SKILL.md

Popularity

Repository stars: 123
Repository forks: 14
7-day trend score: 24

Stars and forks are for the whole GitHub repository, not this skill alone. Refreshed 23 Aug 2026, 2 months ago.

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