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Old 04-16-2014, 01:49 PM
matthiasverstraete matthiasverstraete is offline
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Join Date: Mar 2014
Posts: 5
Default MoCap data reduced to zero

Dear all

I have been trying to set up a model of a flexing knee, based on motion capture data from 3 markers on the tibia and femur respectively. When running my script, no errors appear, though no motion appears either when I run the kinematic analysis.

As far as I believe, something is going wrong at the point of the interpolation of the C3D data. When digging in the C3D data, I find my data points under 'Holder1_1.Pos', though the interpolated values are just zero (Holder1_1.PosInterpol.Data). I tried to modify the interpolation type though this really didn't solve the issue.

Does anybody has a suggestion on this?

thanks in advance!

ps: I had to modify the extension of my ".c3d" file to .txt since I was not able to upload this file otherwise (so you probably need to set it back if you want to analyse it)
Attached Files
File Type: any KneeMotion.any (4.4 KB, 3 views)
File Type: txt flex.txt (90.4 KB, 3 views)
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Old 04-23-2014, 03:33 PM
aalmunajjed aalmunajjed is offline
Senior Member
Join Date: Mar 2011
Posts: 633

Hi Mathias,

try to add to the C3D Input

MarkerUseAllPointsOnOff = On;
Best regards, Amir

Amir Al-Munajjed, AnyBody Support

Please provide AMMR and AMS version numbers in case you send a debug model. The folder structure should follow the standard in the AMMR. This makes it a lot easier for us to answer your questions faster.

Consider to subscribe to a forum, click the 'ForumTools' link above the list of threads then select 'Subscribe to Forum'.
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Old 04-24-2014, 11:15 AM
matthiasverstraete matthiasverstraete is offline
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Join Date: Mar 2014
Posts: 5

Thanks Amir, that indeed resolved the problem!
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