Custom NavLinkProxy issue

Development Programming & Scripting
1

Hello, I made a c++ class derived from NavLinkProxy to be abble to automate their placement. (I want the SmartLink Points to be at the same location of SimpleLinks Points)

So i made a new function intended to be called on Blueprint Construction Script.

Problem is the function UNavLinkCustomComponent::SetLinkData cause a compile error in VisualStudio:

Error	LNK2019	1	unresolved external symbol "__declspec(dllimport) public: void __cdecl UNavLinkCustomComponent::SetLinkData(struct FVector const &,struct FVector const &,enum ENavLinkDirection::Type)" (__imp_?SetLinkData@UNavLinkCustomComponent@@QEAAXAEBUFVector@@0W4Type@ENavLinkDirection@@@Z) referenced in function "public: void __cdecl AMyNavLinkProxy::ChangePointsLocations(void)" (?ChangePointsLocations@AMyNavLinkProxy@@QEAAXXZ)

Here is the code :

// .h
#pragma once

#include "CoreMinimal.h"
#include "Navigation/NavLinkProxy.h"
#include "MyNavLinkProxy.generated.h"

UCLASS()
class CSURVIVALZ_API AMyNavLinkProxy : public ANavLinkProxy
{
	GENERATED_BODY()
	AMyNavLinkProxy();

public:
	UPROPERTY(EditAnywhere, BlueprintReadOnly)
	FVector StartOffset;
	
	UPROPERTY(EditAnywhere, BlueprintReadOnly)
	FVector EndOffset;

	UPROPERTY(EditAnywhere, BlueprintReadOnly)
	TEnumAsByte<ENavLinkDirection::Type> Dir;	

	UFUNCTION(BlueprintCallable, Category = "Custom")
	void ChangePointsLocations();	
};


// .cpp

#include "MyNavLinkProxy.h"
#include "NavLinkCustomComponent.h"
//#include "AI/Navigation/NavLinkDefinition.h"
#include "Engine/Engine.h"

AMyNavLinkProxy::AMyNavLinkProxy()
{
	StartOffset = FVector(0);
	EndOffset = FVector(0);
	Dir = ENavLinkDirection::BothWays;
}

void AMyNavLinkProxy::ChangePointsLocations()
{
	// Simple Link
	PointLinks[0].Direction = Dir;
	PointLinks[0].Left = EndOffset;
	PointLinks[0].Right = StartOffset;

	// Smart Link : The function that is causing error
	GetSmartLinkComp()->SetLinkData(StartOffset, EndOffset, Dir);
}

What is wrong here?

I made some test with the following code in .cpp instead of GetSmartLinkComp() and it compile just fine

UNavLinkCustomComponent* test= nullptr;
	if (test)
	{
		test->SetLinkData(StartOffset, EndOffset, Dir);
	}

If this can’t be resolved, should i use another Actor instead of SmartLink?
Any help is greatly appreciated.

2

You need to include the NavigationSystem module in your .Build.cs. It’s the module “NavLinkCustomComponent.h” is in.