Dear all, 

I'm working with the NDI Polaris system. 
I'm tracking standard passive tools but also want to track single markers 
(independantly and/or as a set). 
Browsing the code, I only found the: 

/** 
* \brief Get 3D marker positions (operation mode must be set to 
MarkerTracking3D or HybridTracking) 
*/ 
virtual bool GetMarkerPositions(MarkerPointContainerType* markerpositions); 





method for getting access to the single markers in my environment. 

My associated questions are the following: 

    • Is there any other "extended" version of the NDITrackingDevice class 
which allows to get more info regarding the markers (IDs, set consistancy 
between to tracked time, ...)? 
    • I'm starting to browse the NDI API to see what could be usefull but I'm 
assuming that I would then need to derive my own NDITrackingDevice, right? 
    • What is the best way to handle 3D representation of those markers (let's 
say a sphere)? for each marker shall I build an associated NavigationData 
structure and connect it to my visualizer and to a DataTreeNode ? Or are there 
some data structure that could display a changing point set? 

Thank you in advance. 

Best regards, 

Tangi 




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