[IGSTK-Users] NDI Polaris Spectra: Setting Tracking Volume

[Patrick Cheng]

Hi Jason,

For accuracy consideration, IGSTK only reports tracking data within the 
manufacturer specified ideal tracking range.

You can change this setting by using the VSEL command. Try insert the 
following line into the igstkNDITracker.cxx file after line 134

m_CommandInterpreter->Command("VSEL:2");

See if it will give you a larger tracking volume.

Let me know how it goes,

Patrick



On 6/10/2011 2:47 PM, Jason Gibbs wrote:
> Hello IGSTK Community,
>
> We are having an issue that we aren't able to resolve, even with the 
> friendly assistance of some of the NDI support people.  We are using 
> an NDI Polaris Spectra tracker and are noticing that tools are losing 
> track at a Z depth of approximately 2400mm in our IGSTK-based app. 
>  When using the NDI Track GUI, however, the extended volume is set and 
> can track to around 3000mm in the same direction.  We have flashed the 
> tracker with a configuration file which is supposed to change the 
> default tracking volume to the extended pyramid, however we obviously 
> aren't seeing this in our IGSTK-based app.
>
> The NDI support staff suggested sending an appropriate VSEL command to 
> the tracker to select the tracking volume at runtime in our IGSTK app. 
>  This, however, seems to be pretty-well encapsulated away from 
> standard library usage (indeed, no VSEL command is sent), so we 
> suspect this isn't the best way to go with respect to the IGSTK 
> architecture.  We are fine modifying our version of the library to do 
> this, but would very much appreciate guidance on how to form the 
> serial communication instructions and where to properly fit these 
> commands into the existing library.
>
> Alternatively, if there are any tricks to initializing/saving this 
> information on the tracker itself so that we don't have to modify any 
> IGSTK internals, but the tracking volume used in IGSTK mirrors what 
> appears in the NDI Track GUI, we would much prefer to go that route. 
>  We suspect that this is a fairly common desire for users (to change 
> the tracking volume to the biggest one available) so we're hoping that 
> I'm just missing something quite obvious either in IGSTK or in the NDI 
> configuration apps.
>
> We would very much appreciate any advice/suggestions that the 
> community may have.
>
> Thank you!
>
> -Jason Gibbs
>
>
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