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

http://aigo.iteye.com/blog/2268056

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

Cpp代码  


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

{  

    if (Path.IsEmpty()) return NULL;  

  

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

}  

调用：

Cpp代码  


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

UTexture2D* tmpTexture = LoadTextureFromPath(PathToLoad);  

 

 

 

示例2：

加载Material和Texture

Cpp代码  


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：

Cpp代码  


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

Mesh->SetMaterial(0, DynamicMaterial);  

 

 

如果资源永不再使用，想销毁资源对象，代码如下：

Cpp代码  


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