[UE4]C++实现动态加载UObject：StaticLoadObject()；以Texture和Material为例

时间：2022-12-29 07:08:37

相关内容：

C++实现动态加载的问题：LoadClass<T>()和LoadObject<T>()

http://aigo.iteye.com/blog/2281558
C++静态加载问题：ConstructorHelpers::FClassFinder()和FObjectFinder() 

http://aigo.iteye.com/blog/2281373

示例1：

动态加载Object的工具方法

UTexture2D* MyTextureLoader::LoadTextureFromPath(const FString& Path)

{

    if (Path.IsEmpty()) return NULL;  

    return Cast<UTexture2D>(StaticLoadObject(UTexture2D::StaticClass(), NULL, *(Path)));

}

调用：

FString PathToLoad = "/Game/Textures/YourStructureHere";

UTexture2D* tmpTexture = LoadTextureFromPath(PathToLoad);

示例2：
加载Material和Texture

struct FConstructorStatics

 {

     ConstructorHelpers::FObjectFinderOptional<UTexture> TextureFinder;

     ConstructorHelpers::FObjectFinderOptional<UMaterial> MaterialFinder;

     FConstructorStatics()

         : TextureFinder(TEXT("Texture2D'/Game/Textures/2DBackground.2DBackground'"))

         , MaterialFinder(TEXT("Material'/Game/Materials/DynamicTextureMaterial.DynamicTextureMaterial'"))

     {

     }

 };

 static FConstructorStatics ConstructorStatics;  

 Texture = ConstructorStatics.TextureFinder.Get();

 UMaterial* Material = ConstructorStatics.MaterialFinder.Get();

 DynamicMaterial = UMaterialInstanceDynamic::Create(Material, this);

设置调用加载好的Material和Texture：

DynamicMaterial->SetTextureParameterValue(FName("DynamicTexture"), Texture);

Mesh->SetMaterial(, DynamicMaterial);

如果资源永不再使用，想销毁资源对象，代码如下：

Texture2D* mytex; //这里假设mytex合法有效  

mytex->ConditionalBeginDestroy();

mytex = NULL;

GetWorld()->ForceGarbageCollection(true);

Dynamic Asset Loading with C++

https://www.youtube.com/watch?v=pJIAmSGxfmQ

Dynamic Load Object

https://wiki.unrealengine.com/Dynamic_Load_Object

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