I am making project for school olimpic, and I make evacuation app using unity 3d. App are working on Android. For positioning user I am using AR Foundation. Base of my app is build similarly as guy from this video: (). All working pretty well, but its evacuation app, and it have to be perfect. Start of navigation is when user scan NFC tag with id, and next app locate user on specify position in 3d map of school. Problem is when user scan tag, and camera of phone havent any reference point like poster on wall. If camera on start view only wall in one color, the line with have to show evacuation way (NavMesh) for user, can show it in wrong direction. Also when I testing it, sometimes while normaly walking around the school, app can lost right direction, and show line in wrong way. Problem is not huge, but it often works when on the start, scan is good, but it can be broke while scanning. I will mention that start rotation and position is in script database, and it is for exampleL vector3(3,1,5) rotation(90).
I lately found that ar foundation have sth like anchor(?), but I dont know how to implement it on my app, and I am not sure, it can repair my problem. Also I wathing tutorial () and there this guy can anything like rotation positioning on start.