I would like to have a 3d arrow at the bottom half of the mobile screen, which rotates as the user moves to show which direction they should be walking to reach the destination.
The first question is, how do you display a 3d object to remain always visible on a particular part of the screen. I do not want to use tracking as I do not need to track any targets for this. Would snapping the object to screen work?
We do have a detailed sample on how to implement such a plugin here.
Don't be confused by it being a marker tracking sample. For your use case you can remove all the tracking code and simply set the transformation required. All you need, really, is a 4x4 transformation matrix.