Nintendo has filed a patent that would allow you to control the contents of the top screen of the 3DS with the stylus, but without a physical connection between the two. this would involve the front-facing camera on the 3DS. It would detect a “marker” at the tip of the stylus, allowing it to essentially:
"…calculate the marker’s position in 3D space based on its size and position, using that information to manipulate an item on the top screen."
The patent also shows that the concept stylus would have a vibration functionality. This basically allows you to feel the objects on the top screen that you are interacting with, think of it as a rumble pack for the 64 controller. but for now remember these are just concepts and they may never see the light.
"…calculate the marker’s position in 3D space based on its size and position, using that information to manipulate an item on the top screen."
The patent also shows that the concept stylus would have a vibration functionality. This basically allows you to feel the objects on the top screen that you are interacting with, think of it as a rumble pack for the 64 controller. but for now remember these are just concepts and they may never see the light.
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