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Use a real room model to position holograms
Let's suppose that I have created and saved the model of my room.
I'm working with Unity.
My question is:
How I am able to know the exact position where I am, related to the room model?
Thing is that I need to save an hologram position at a specified point. After restarting the application, I need to show the hologram at the exact position.
How can I achieve it?