Unreal Engine 4 C++ 为编辑器中Actor创建自己定义图标

有时候我们创建场景的时候，特定的Actor我们想给它一个特定的图标，便于观察。比方这样：

实现起来也非常easy。须要编写C++代码：

我们创建一个Actor，叫AMyActor。它包括一个Sprite(精灵)，这个精灵负责显示自己定义图标：代码例如以下

#pragma once

#include "GameFramework/Actor.h"

#include "Components/BillboardComponent.h"

#include "MyActor.generated.h"

/**

 *

 */

UCLASS()

class NANTOPDOWN_API AMyActor : public AActor

{

	GENERATED_UCLASS_BODY()

	//virtual void BeginPlay() OVERRIDE;

	UPROPERTY()

	TSubobjectPtr<UBillboardComponent> SpriteComponent;

	UTexture2D* SpriteTexture;

};

#include "NanTopDown.h"

#include "MyActor.h"

AMyActor::AMyActor(const class FPostConstructInitializeProperties& PCIP)

	: Super(PCIP)

{

	struct FConstructorStatics

	{

		ConstructorHelpers::FObjectFinderOptional<UTexture2D> NoteTextureObject;

		FName ID_Notes;

		FText Name_Notes;

		FConstructorStatics()

			: NoteTextureObject(TEXT("Texture2D'/Game/Textures/MyIcon.MyIcon'"))

			, ID_Notes(TEXT("Notes"))

			, Name_Notes(NSLOCTEXT("SpriteCategory", "Notes", "Notes"))

		{

		}

	};

		static FConstructorStatics Cs;

		TSubobjectPtr<USceneComponent> SceneComponent = PCIP.CreateDefaultSubobject<USceneComponent>(

			this, TEXT("SceneComp"));

		RootComponent = SceneComponent;

		RootComponent->Mobility = EComponentMobility::Static;

#if WITH_EDITORONLY_DATA

		SpriteComponent = PCIP.CreateEditorOnlyDefaultSubobject<UBillboardComponent>(this, TEXT("Sprite"));

		if (SpriteComponent)

		{

			SpriteComponent->Sprite = Cs.NoteTextureObject.Get();

			SpriteComponent->SpriteInfo.Category = Cs.ID_Notes;

			SpriteComponent->SpriteInfo.DisplayName = Cs.Name_Notes;

			SpriteComponent->AttachParent = RootComponent;

			SpriteComponent->Mobility = EComponentMobility::Static;

		}

#endif

}

AMyActor仅仅有一个UBillboardComponent组件。增加场景就能够看到自己定义的图片了。

參考文章：https://wiki.unrealengine.com/Add_in_editor_Icon_to_your_Custom_Actor