[C++] DrawFrustum component link error

Development Programming & Scripting
1

Trying to add a DrawFrustumComponent to a custom actor, I get the following error during linking:

error LNK2019: unresolved external symbol "public: static class UClass * __cdecl UDrawFrustumComponent::GetPrivateStaticClass(wchar_t const *)" (?GetPrivateStaticClass@UDrawFrustumComponent@@SAPEAVUClass@@PEB_W@Z) referenced in function "public: class UDrawFrustumComponent * __cdecl FPostConstructInitializeProperties::CreateDefaultSubobject(class UObject *,class FName,bool,bool)const " (??$CreateDefaultSubobject@VUDrawFrustumComponent@@V1@@FPostConstructInitializeProperties@@QEBAPEAVUDrawFrustumComponent@@PEAVUObject@@VFName@@_N2@Z)

It seems it has something to do with the creation of the component as the error goes away if I remove the following line:

DrawNearDOF = PCIP.CreateDefaultSubobject(this,FName("Near DOF"));
2

#No it’s not in Beta6

I just checked and no it did not make it into Beta6

:slight_smile:

Rama

3

Hi Cedric,

Thanks for the report! Just wanted to let you know that I’ve found the issue and fixed it internally. In the meantime, the DrawDebugFrustum workaround seems like a reasonable approach.

Cheers!
Jeff

4

Hi Jeff, did this make it to beta 6?

5

Nope, Beta6 was deep in the pipe when this fix went in, sorry. The next release should have it.

6

I dont think you can do anything about this in current rocket version based on this part:

UDrawFrustumComponent::GetPrivateStaticClass(wchar_t const *)

you have to wait for Epic to expose this to Rocket Users so compiler finds the class :slight_smile:

#Alternative Solution

You know you can draw a debug view frustrum right?

you could probably get a workaround for your current goal that way :slight_smile:

#DrawDebugFrustrum

ENGINE_API void DrawDebugFrustum(const UWorld* InWorld, const FMatrix& FrustumToWorld, FColor const& Color, bool bPersistentLines = false, float LifeTime=-1.f, uint8 DepthPriority = 0);

Rama

PS: in case you get hungry:

ENGINE_API void DrawDebug2DDonut(const UWorld* InWorld, const FMatrix& TransformMatrix, float InnerRadius, float OuterRadius, int32 Segments, const FColor& Color, bool bPersistentLines = false, float LifeTime=-1.f, uint8 DepthPriority = 0);