2.2 KiB
2.2 KiB
SkipUCSModifiedProperties
- 功能描述: 跳过序列化Component里某个属性
- 使用位置: UPROPERTY
- 引擎模块: Serialization
- 元数据类型: bool
- 限制类型: ActorComponent下的属性
- 常用程度: 0
原理:
只在ActorComponent.cpp里用到,感觉是用于跳过序列化某个属性。 也只在UPrimitiveComponent 里的BodyInstance用到。物理的表示信息是运行时生成的,确实不需要序列化。但其实标一个Transient也就可以了,只能说是混乱的用法了。
SimpleConstructionScript指的是这个组件是在Actor的蓝图面板里添加进去的,而不是再蓝图通过AddComponent里动态添加的。
UCLASS(abstract, HideCategories=(Mobility, VirtualTexture), ShowCategories=(PhysicsVolume), MinimalAPI)
class UPrimitiveComponent : public USceneComponent, public INavRelevantInterface, public IInterface_AsyncCompilation, public IPhysicsComponent
{
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Collision, meta=(ShowOnlyInnerProperties, SkipUCSModifiedProperties))
FBodyInstance BodyInstance;
}
void UActorComponent::DetermineUCSModifiedProperties()
{
if (CreationMethod == EComponentCreationMethod::SimpleConstructionScript)
{
//TMap<UActorComponent*, TArray<FSimpleMemberReference>> AllUCSModifiedProperties;
//把组件里和CDO不一样的属性存到AllUCSModifiedProperties里
class FComponentPropertySkipper : public FArchive
{
public:
FComponentPropertySkipper()
: FArchive()
{
this->SetIsSaving(true);
// Include properties that would normally skip tagged serialization (e.g. bulk serialization of array properties).
ArPortFlags |= PPF_ForceTaggedSerialization;
}
virtual bool ShouldSkipProperty(const FProperty* InProperty) const override
{
static const FName MD_SkipUCSModifiedProperties(TEXT("SkipUCSModifiedProperties"));
return (InProperty->HasAnyPropertyFlags(CPF_Transient)
|| !InProperty->HasAnyPropertyFlags(CPF_Edit | CPF_Interp)
|| InProperty->IsA<FMulticastDelegateProperty>()
#if WITH_EDITOR
|| InProperty->HasMetaData(MD_SkipUCSModifiedProperties)
#endif
);
}
} PropertySkipper;
}
}