Thanks for your quality answer M.Stanev, Basically the -1,-1 range means that all segments are "allowed" to wrap on the obstacle. If we have an muscle that have 3 pathpoints indexed by 1, 2 and 3, there is in a case an equivalence between (-1,-1) and (1,3). If we want only the last segment to be che...

Dear all, I'd like to add some wrap surfaces to my model in order to have realistic moment arms during high flexion of the knee/hip. When looking at a template model that have some wrapping surfaces I found something strange : for the muscle you want to be wrapped, you need to specify on which sufac...

Hello These are two different type of constraints : the first one links two coordinates : You can see that the independant_coordinate name is the shoulder_elv. The dependant coordinate is the sternoclavicular_r2. That means the value of the shoulder_elv coordinate will constrain the value of the ste...

Sorry for the late answer, I was searching for the place where this function was called. It may not be that but try to have a look at this link https://github.com/opensim-org/opensim- ... Solver.cpp

Yanis

Yes, and it seems that they use a function : calcReactionOnParentExpressedInGround as shown in attachment. This function use another one called findMobilizerReactionOnParentAtFInGround.

Nevertheless, I can't access the c++ code of this function even on the API.

Thanks for your answer

Thank you, I had a huge feeling the fiber velocity was used to compute the fiber length. I know it may be much to ask, but can you tell me in which C++ file the integrator are coded ?

Thank you for your answer. The first paper consist of 4 simulations of knee contact forces for a patient that has a tibio-femoral alignment of 174°. They did more and more subject specific simulation and compare them with in vivo datas of that patient. The second one computes the tibiofemoral forces...

Ok, I imagine you already know it, but here is how IK works. You create virtual markers on your model that are at the same place of the real markers. The input will be a trc file containing the position of these markers. Opensim will try to find the set of coordinates q that minimize the sum of the ...

Hello,

What kind of constraints do you want to use ?

Yanis.

Dear all, Lamberto et al in 2015 published an article where they used three musculoskeletal models (London Lower limb model, Lower limb, G2392). They said at one point of the article (see in attachment) that they did not compute knee reaction forces for the models that include a patella because they...