How do you get a Navigation path in UE4 4.20 in C++?

Development Programming & Scripting AI
, , , , ,
1

I’m currently trying to figure out how to get a Navigation path for my pawn in C++.The way I’ve seen people get the path is by using GetWorld()->GetNavigationSystem()->FindPathToLocationSynchronously(). But, in UE4 4.2, GetWorld()->GetNavigationSystem() returns a NavigationSystemBase which doesn’t have the find path functionality. Does anyone know how I can find a path in 4.2 in c++?

Also the documentation online is out of date for the include for NavigationSystem.h, its now located in Runtime/NavigationSystem/Public/NavigationSystem.h

Any help would be appreciated!

1 Like
2

I think I figured it out.

include “Runtime/NavigationSystem/Public/NavigationSystem.h”

then

UNavigationSystemV1* navSys = UNavigationSystemV1::GetCurrent(GetWorld());
UNavigationPath* path = navSys->FindPathToLocationSynchronously()

3

Just kidding, in 4.2 you have to add “NavigationSystem” to your projects Build.cs

and to get the path finding system and nav points

UNavigationSystemV1* navSys = FNavigationSystem::GetCurrent(GetWorld());

UNavigationPath* path = navSys->FindPathToLocationSynchronously(GetWorld(), GetPawn()->GetActorLocation(), position, NULL);

1 Like
4

So my first answer worked on my work project and my second answer worked when I was in the UE4 Advanced Car template project. I’m pretty sure they are both engine version 4.20, so idk whats up with that.

5

Wow thanks for the tip about adding the navigation system to the build.cs file. Don’t know how you figured it out but that worked out for me.
I was already pulling my hair out trying to figure out why the linker couldn’t find the definition for FindPathToLocationSynchronously().

6

Wow thanks for the tip about adding the navigation system to the build.cs file. Don’t know how you figured it out but that worked out for me.
I was already pulling my hair out trying to figure out why the linker couldn’t find the definition for FindPathToLocationSynchronously().