Hi Ayman,

The OpenSim documentation mentions that you can calculate the joint contact loads from the estimated muscle forces but does not show how to do it. Do you (or anyone else) have any example/documentation on how to perform this analysis.

Thanks,
Ajay

Hi all,

How do I calculate the joint contact loads from the estimated muscle forces? Is it the same as the joint reaction forces calculated by the joint reaction analysis. If not does anyone know or have an example of how to do this.

Thanks,
Ajay

<r>Hi all,<br/> <br/> I am trying to find the joint contact forces on the lumbar vertebrae. I was able to take full body model (gait2392_arms.osim by Tim Dorn) and modify it to create five joints at the lumbar region for the five lumbar vertebrae (FullBody.osim). I have extracted the motion capture ...

Ayman,

Thanks, that works.

Cheers,
Ajay

<t>Hi Ayman,<br/> <br/> If I change the line to <br/> <br/> OpenSim::BodySet& thoraxBody=osimModel.getBodySet().get("thorax");<br/> <br/> it generates an error,<br/> error C2440: 'initializing' : cannot convert from 'const OpenSim::Body' to 'OpenSim::Body &'<br/> <br/> Any suggestions.<br/> ...

<t>Hi Ayman,<br/> <br/> I got the links (L1-L5) between thorax and pelvis. I was trying to change the parent body for thorax to L1 from pelvis and did the following,<br/> <br/> // Get the thorax body<br/> OpenSim::Body thoraxBody=osimModel.getBodySet().get("thorax");<br/> <br/> OpenSim::Joint &t...

<t>Ayman,<br/> <br/> (from the previous post in 'osim file documentation'). <br/> <br/> I was able to read in an existing osim file (UpperLowerBody.osim by Delp et al)and add new body to it (l4 and l5 vertebrae). I removed the hat_spine.vtp from the thorax body (in Notepad). I want to split the spin...

Ayman,

I have Visual C++ 2008 Express edition. I also downloaded the developers guide. I will go through the instructions. Another question, is it possible to make use of an existing osim model so that I can build upon it.

Thanks,
Ajay

Ayman,

If I want to use the OpenSim API, how would I go about it. As of now I have no clue as to how and trying to put information together from various help files.

Thanks,
Ajay

Anne,

The help says default engine used by xml_write is Xerces. I also tried to specify this explicitly in the input but still get the same error.

Ajay