Nintendo planning another Wii accessory. Head Tracking, here we go?

[JHawkNH]

Ya! It's lunch time. So here is the explination I promised.


IR alone:
Because you will be facing the tv (and thus the IR emiter) most of the time, the only way to tell how much of angle you are veiwing the tv at is to compare how close the IR dots are. This has two problems.
1. The veiwed distence between the dots would change as you moved closer and further from the screen. This would make it seem like the angle is changing when you are only moving closer to and further from the TV.
2. There is no way to figure out which side of the tv you are on. The dots are "veiwed" to be the same distance from both sides of the screen at the same angles. (This assumes that you are looking at the tv, which you have to do if you want to play the game.


Wiimote:
Picture the wiimote as it would be in the diagram. Say the Z axis is pointing out of the IR camera, the Y axis is pointing straight up, and the X axis is pointing away from the head.
If the person moves right or left the X axis would show acceleration.
If the person moves up or down the Y axis would show acceleration.
If the person moves forward or back the Z axis would show acceleration.
This gives you the basic movments.
If a person turns their head then both the X & Z axises would show acceleration. (The center of the head is the rotaion point due to the neck being the piviot point)

The IR camera would only be used to verify the calculated position of all these movements.


Any questions?