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C++: GetRandomReachablePointInRadius

Hi, I'm really confused with navigation systems. I copied the code from this site: link text. This is my code:

 #include "BaseAiController.h"
 #include "Runtime/Engine/Classes/AI/NavigationSystemBase.h"
 #include "Runtime/NavigationSystem/Public/NavigationSystem.h"
 #include "Runtime/NavigationSystem/Public/AbstractNavData.h"
 
 bool ABaseAiController::GetRandomPointInRadius(const FVector& Origin, float Radius, FVector& OutResult)
 {
     UNavigationSystem* NavSys = UNavigationSystem::GetCurrent(GetWorld());
     if (!NavSys)
     {
         return false;
     }
     //~~~~~~~~~~~~~
 
     FNavLocation Result;
     //This is a wrapper for UE4 version
     bool bSuccess = NavSys->GetRandomPointInRadius(Origin, Radius, Result);
 
     //Out
     OutResult = Result.Location;
     return bSuccess;
 }
 

The error is this: "GetRandomReachablePointInRadius": is no element of "UNavigationSystem". Now if I access NavigationSystem.h, I find this code: alt text. The strange thing is, the program doesn't find any functions of the upper box, but "ProjectPointToNavigation" it can find. I tried to get information from the unreal engine wiki, but sadly every time I try to get to this site: https://api.unrealengine.com/INT/API/Runtime/Engine/AI/Navigation/UNavigationSystem/index.html, there is an error :"404 page not found". What can I do?

Product Version: UE 4.20
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asked Sep 01 '18 at 11:53 AM in C++ Programming

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Aneos
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