Use additional acromion markers for MoCap LowerBody model?

Main Forum
1

Hello

Is it possible to use additional markers on the right & left acromion for the MotionAndParameterOptimization of MoCap LowerBody model?

At the moment I use the C7 marker for the thorax, but some of the subjects are missing the C7 marker. They only have two markers on the right & left acromion.

Thank you

2

Yes, just add definitions of virtual markers in the Markers.any file similarly to the default ones.

Regards,
P.

3

Hi pgalibarov

What Segment would you recommend for the acromion, because the arms are not part of the LowerBody model.

// Marker on the Right Acromio-clavicular joint
CreateMarkerDriver RSHO (
MarkerName= RSHO,  
MarkerPlacement= [b]?[/b], 
OptX="Off",OptY="Off",OptZ="Off",  
WeightX=1.0,WeightY=1.0,WeightZ=1.0,
Model1=MotionAndParameterOptimizationModel,Model2= InverseDynamicModel,
sRelOptScalingOnOff="On"
) = {
  sRelOpt = {0.03,-0.0,-0.04};
};

Thank you

4

ThoraxSeg.

5

Hi pgalibarov

Works fine. Thanks a lot for the fast help.

Maybe somebody needs the “sRelOpt” values:


// Marker on the Right Acromion
CreateMarkerDriver RSHO (
MarkerName= RSHO,  
MarkerPlacement=Trunk.SegmentsThorax.ThoraxSeg, 
OptX="Off",OptY="Off",OptZ="Off",  
WeightX=1.0,WeightY=1.0,WeightZ=1.0,
Model1=MotionAndParameterOptimizationModel,Model2= InverseDynamicModel,
sRelOptScalingOnOff="On"
) = {
  sRelOpt = {0.00,0.46, 0.17};
};

// Marker on the Left Acromion
CreateMarkerDriver LSHO (
MarkerName= LSHO,  
MarkerPlacement=Trunk.SegmentsThorax.ThoraxSeg, 
OptX="Off",OptY="Off",OptZ="Off",  
WeightX=1.0,WeightY=1.0,WeightZ=1.0,
Model1=MotionAndParameterOptimizationModel,Model2= InverseDynamicModel,
sRelOptScalingOnOff="On"
) = {
  sRelOpt = {0.00,0.46,-0.17};
};
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