Search found 10 matches

by kahl_hellmer
Tue Jun 22, 2010 1:23 pm
Forum: Tracking Tools
Topic: Large capture volume - and many trackables
Replies: 0
Views: 881

Large capture volume - and many trackables

<t>Hi,<br/> <br/> in a project we're tracking four people (full body) for a real-time application. On each person we've mounted 6 rigid bodies (all in all 24 individual 3 marker trackables). The capture volume is approx. 4x4 metres and 15 Optitrack V100r2 cameras have been mounted at 3 and 4 metres ...
by kahl_hellmer
Tue Jun 22, 2010 1:05 pm
Forum: Tracking Tools
Topic: phantom markers
Replies: 11
Views: 5258

Re: phantom markers

Try using a carpet if you're on a hardwood or plastic floor. Reflections from other cameras' lights can be reflected by the floor and cause strange reflections by the feet.

Kahl
by kahl_hellmer
Wed Mar 10, 2010 8:11 am
Forum: Tracking Tools
Topic: Help on rotation using quaternions or YPR
Replies: 11
Views: 7307

Re: Help on rotation using quaternions or YPR

Thanks alot, it makes perfect sense and works just fine.

If you're ever in Stockholm, I'll buy you a beer =)

Kahl
by kahl_hellmer
Tue Mar 09, 2010 1:40 pm
Forum: Tracking Tools
Topic: Help on rotation using quaternions or YPR
Replies: 11
Views: 7307

Re: Help on rotation using quaternions or YPR

<t>Does anyone know how I can project a point, using the quaternions of the rigid body (trackable)? The point is statically offset relative to the rigid body. <br/> <br/> I.e., a rigid body is defined, and from the rigid body a point is projected with the coordinates x=1, y=0 and z=0. When the rigid...
by kahl_hellmer
Wed Jan 06, 2010 8:27 am
Forum: Tracking Tools
Topic: Help on rotation using quaternions or YPR
Replies: 11
Views: 7307

Help on rotation using quaternions or YPR

Looking at questions asked in the forum I guess that I am not the only one with problems and unanswered questions here...

I would greatly appreciate some documentation or specifications on the rotation orders of YPR and quaternions.


Kahl Hellmer
by kahl_hellmer
Wed Jan 06, 2010 2:22 am
Forum: Tracking Tools
Topic: Left-handed coordinate system in Tracking Tools.
Replies: 10
Views: 8871

Re: Left-handed coordinate system in Tracking Tools.

<t>I find that switching between left- and right handed coordinate system in Tracking Tools works just fine too, but for some reason, no matter what I set in Tracking Tools calibration, I always get left-handed coordinates when I call updateTrackableLocation() and TT_FrameMarkerX-Z(). It doesn't mat...
by kahl_hellmer
Thu Oct 01, 2009 11:40 am
Forum: Tracking Tools
Topic: Markers in a tracked rigid body
Replies: 6
Views: 3470

Re: Markers in a tracked rigid body

You can also use the TT_TrackableMarker() information with the TT_TrackableLocation() and calculate where the markers "should" be. Its probably more CPU-friendly, but might not be suitable. I guess that what you described would be the correct way.

Kahl
by kahl_hellmer
Wed Aug 26, 2009 6:49 am
Forum: Tracking Tools
Topic: TT_IsTrackableTracked() compiler error
Replies: 6
Views: 2095

TT_IsTrackableTracked() compiler error

<t>I cannot seem to make use of the (very important) function TT_IsTrackableTracked(). Everything else in the API works just fine - but when I try to call TT_IsTrackableTracked() I get an error LNK2001 when I compile. Libraries are properly added. Has anyone else encountered this problem? I'm using ...
by kahl_hellmer
Wed Aug 19, 2009 1:43 am
Forum: Tracking Tools
Topic: Markers in a tracked rigid body
Replies: 6
Views: 3470

Re: Markers in a tracked rigid body

<t>Ok, thanks. Then I'll do it the hard way for now..<br/> <br/> It would help me alot if the API had a function that takes a rigid body index and a marker index as input and returns the marker position (not from definition, but the tracked position). Also, the possibility to explicitly index or set...
by kahl_hellmer
Tue Aug 18, 2009 4:35 am
Forum: Tracking Tools
Topic: Markers in a tracked rigid body
Replies: 6
Views: 3470

Markers in a tracked rigid body

<t>..a question about real-time tracking of a specific marker in a tracked rigid body. What would be the easiest/CPU-friendliest way of finding this marker? In a way - what I am looking for is a function like TT_TrackableMarker() for the tracked rigid body and not the rigid body definition.<br/> <br...