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  #1  
Old 06-06-2012, 09:44 AM
coala2000 coala2000 is offline
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Phase Space and Vizard

Hello everyone -

I am a student at the University of Minnesota and I am working with Vizard and a PhaseSpace tracking system. I am unclear on how to set up a 6DOF from the PhaseSpace markers from the Vizard documentation. I am just trying to make link the Vizard Main View to a object that PhaseSpace is tracking so we are then able to use a HMD.

I know about the PhaseSpace plug-in for VIzard:
http://docs.worldviz.com/vizard/PhaseSpace.htm

Also I am not able to find any information on how to "fuse" two 3DOF trackers to make a 6DOF. I have found the viztracker.py documentation.

All the help is greatly appreciated.
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  #2  
Old 06-07-2012, 12:45 AM
Jeff Jeff is offline
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Take a look at the viz.mergeLinkable command. That will allow you to create a single 6DOF tracker from two 3DOF trackers.
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  #3  
Old 06-07-2012, 12:43 PM
coala2000 coala2000 is offline
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Thanks for the information. I think that is a step in the right direction for what I am trying to get. But do you know anything about the PhaseSpace command <phasespace>.addMarker() because I am a little unclear how I know which marker I am going to get when I call the function.

Thanks again for all the help.
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  #4  
Old 07-17-2013, 01:46 PM
mhtong mhtong is offline
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To revisit this...

Mergelinkable takes the orientation from one sensor/object and the position from another sensor/object. This isn't the case with PhaseSpace - we just have position information.

It still feels like this should all be quite easy in Vizard, but there doesn't seem to be a nice walkthrough. With three position sensors, we should be able to define a rigid body, which then has position and orientation information.

Thanks!

-Matt
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  #5  
Old 07-17-2013, 02:47 PM
Jeff Jeff is offline
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Are you able to define rigid bodies in the PhaseSpace software? If so, does it support streaming that data via VRPN?
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  #6  
Old 07-17-2013, 07:05 PM
mhtong mhtong is offline
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I believe so, but we've someone looking into it. There's a API for Python that we're reading up on.

But initially it sounded like there was an easy way to link up the position sensors within Vizard, forming a 6DOF sensor from several 3DOF sensors (as the OP was asking)... but digging deeper, all the examples are for combining position info with orientation info.
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