Skill: Add Component to Actor

Description

Add and configure a UE component on an existing actor class.

Arguments

• {{arg1}}: Actor class name
• {{arg2}}: Component type (e.g., UStaticMeshComponent, UAudioComponent)

Steps

1. In header, declare the component:

   UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="Components")
   TObjectPtr<{{arg2}}> MyComponent;
   

2. In constructor, create and attach:

   MyComponent = CreateDefaultSubobject<{{arg2}}>(TEXT("MyComponent"));
   MyComponent->SetupAttachment(RootComponent);
   

3. Configure default properties as needed

4. Add required include for the component type

Notes

• Use TObjectPtr<> instead of raw pointers for GC safety
• VisibleAnywhere shows in viewport, EditAnywhere allows editing
• If adding a component from a non-core module (e.g., UMG, Niagara), ensure the module is added to PublicDependencyModuleNames in the .Build.cs file.

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Design-Time Blueprint Component Attachment (Native C++ Tool)

To attach a new component to an existing Blueprint asset (.uasset) at design time without modifying C++ source code, use the native C++ action tool add_blueprint_component.

Usage Protocol

Invoke add_blueprint_component with the target Blueprint asset path, component class, new component name, and optional parent attachment node:

{
  "blueprint_path": "/Game/Blueprints/BP_MyActor",
  "component_class": "UStaticMeshComponent",
  "component_name": "MeshComponent",
  "parent_component_name": "DefaultSceneRoot"
}

Parameters

• blueprint_path (string, required): Object path to target Blueprint asset.
• component_class (string, required): Component class name (e.g. 'UStaticMeshComponent', 'USphereComponent', 'UAudioComponent', 'UNiagaraComponent').
• component_name (string, required): Unique identifier name for the new SCS component node.
• parent_component_name (string, optional): Parent component node to attach under. Defaults to RootComponent if omitted.