forums.naturalpoint.com

I faced a problem with coordinates, returned by Vector.Update(). Camera tracks Vector clip ok, function returns stable (same) values, but results are not in mm as promised in SDK.
Later I found that trackir sortware (4.1) has different profiles for tracking, and that "real" position differs from "in-game" position.
In my research I need to track real user position. What should I do? What functions correspond my goal?

I think, I may use some magical constants, but it is not a good decision.
By the way, why the coordinates are corrected?

The TrackIR software is designed to amplify the natural head movement the people have, when playing games, and turns that into in game head movement. That way they can look behind them, without looking away from the screen, and the camera viewing area.

It looks like you are looking to use the vector tracking features from the OptiTrack SDK, which currently do not have any official support

Thank you.
It's a pity.

What formula is used to convert real coordinates?

[quote=InflunZa]What formula is used to convert real coordinates? [/quote]

I need it

The TrackIR SDK does not report real-world coordinates. For extracting real-world 6 DOF data in mm, you will need to purchase Tracking Tools with 3 or more V100:R2 cameras. Or, you can utilize the free OptiTrack SDK with a TrackIR 5 to obtain weighted X,Y coordinate data in mm. As Vincent noted, you can also get real world vector data out of the OptiTrack SDK with INPVector2, but it's not officially supported. For more information on that, you can check out this thread. Keep in mind that the values are relative to the camera's focal point, and are non-linear. So, for measurement-based analytics, TrackIR really is not sufficient. That level of analysis is only achievable with our OptiTrack line of products.