问题
I'm wondering how exactly one use drift correction? It seem to refuse to work with area learning (error message: "Drift-correction mode is incompatible with learning mode or ADF loading."), something the documents lead me to believe that it should.
回答1:
Drift correction is only used for single session AR experiences. It handles the case when device lost tracking in AR and relocalize the device back to previously visited area. Currently, drift correction cannot be used for saving ADF (a.k.a Area Learning).
You can basically think it as a smaller but much denser ADF that can be used in realtime without saving/loading.
来源：https://stackoverflow.com/questions/41097952/how-to-use-drift-correction