Search found 31 matches

by litch09
Wed Jun 30, 2010 7:58 pm
Forum: Tracking Tools
Topic: Tracking tools - Matlab and Labview
Replies: 33
Views: 40027

Re: Tracking tools - Matlab

I should also note, that it is probably best to rebuild the NPTrackingTools VI library from the DLL (see comments on how to import shared library in previous posts) for each new version of the Tracking Tools software that is released.
by litch09
Wed Jun 30, 2010 7:54 pm
Forum: Tracking Tools
Topic: Tracking tools - Matlab and Labview
Replies: 33
Views: 40027

Re: Tracking tools - Matlab

<t>Hi Drorm,<br/> <br/> I'd need to know what you've done in more detail. It is necessary to have setup your project in Tracking Tools first (with hardware key). Then close down the Tracking Tools program and open the Labview VI (TT_test.vi). When you run the VI, it should work automatically, if it ...
by litch09
Tue May 25, 2010 3:05 pm
Forum: Tracking Tools
Topic: c3d export into MB
Replies: 10
Views: 5304

Re: c3d export into MB

<r>Hi Doug,<br/> <br/> We seem to be having some trouble getting this to work. In fact often things go totally crazy. It seems that if load a timeline file and then export from the first frame, that things seem to go OK. However sometimes when we export (typically when we have played through the tim...
by litch09
Sun May 23, 2010 5:16 pm
Forum: Tracking Tools
Topic: c3d export into MB
Replies: 10
Views: 5304

Re: c3d export into MB

<t>I have another question regarding the C3D export.<br/> <br/> We have four trackables which track well. We then export these and load in Visual 3D. From one trial to the next, the marker names (which are numbers) change so that the same marker is called something different each time. The trackable...
by litch09
Tue Mar 09, 2010 4:57 pm
Forum: Tracking Tools
Topic: Help on rotation using quaternions or YPR
Replies: 11
Views: 7452

Re: Help on rotation using quaternions or YPR

<t>This is how I would do it - <br/> <br/> I think that is typically easiest to use the Direction Cosine Matrix (DCM) for rotation operations. So first you need to convert quaternions to DCM -<br/> <br/> DCM = [(1-2*qy^2 - 2*qz^2) (2*qx*qy(i) - 2*qz*qw) (2*qx*qz + 2*qy*qw)<br/> (2*qx*qy + 2*qz*qw) (...
by litch09
Tue Jan 26, 2010 6:04 pm
Forum: ARENA & Expression
Topic: partial marker sets
Replies: 1
Views: 878

partial marker sets

Is it possible to collect only some body parts in Arena, eg. the legs or arms only? Or do you have to collect the full body marker set?
by litch09
Sun Jan 24, 2010 8:59 pm
Forum: General OptiTrack Support
Topic: part skeletons
Replies: 1
Views: 644

part skeletons

Is it possible to collect only some body parts in Arena, eg. the legs or arms only? Or do you have to collect the full body marker set?
by litch09
Sun Jan 24, 2010 3:58 pm
Forum: Tracking Tools
Topic: Tracking tools - Matlab and Labview
Replies: 33
Views: 40027

Re: Tracking tools - Matlab

I have also posted the Matlab demo on Mathworks file exchange -

http://www.mathworks.com/matlabcentral/ ... ange/26449?
by litch09
Wed Jan 20, 2010 11:22 pm
Forum: Tracking Tools
Topic: Tracking tools - Matlab and Labview
Replies: 33
Views: 40027

Re: Tracking tools - Matlab

I have put this onto the NI website.

http://decibel.ni.com/content/docs/DOC-9171
by litch09
Tue Jan 12, 2010 7:56 pm
Forum: Tracking Tools
Topic: Help on rotation using quaternions or YPR
Replies: 11
Views: 7452

Re: Help on rotation using quaternions or YPR

I should clarify that the convention above is a ZYX rotation sequence (rotate about the Z axis first, then about the Y' axis and then about the X' axis)