Thank you for posting that example. I read through it. It seemed that this code used an XML document in conjunction with the AnalysisTool class to perform Static Optimization. Do you know if it is possible to actually use the StaticOptimization class in the C++ code as outlined here: https://simtk.o...

Hello, I am trying to use Static Optimization to solve for muscle forces in a model given a kinematic path. I am using the API. I read through the Doxygen documentation about the StaticOptimization class, but I still have a few questions. I am unsure how to apply an external force to a model. I trie...

Ok, I will try those. From a physical standpoint (not a computer science standpoint) what is the difference between the active fiber force, the passive fiber force, and the tendon force, and in general how are these values calculated?

Joel

Hello, I have some questions about the Inverse Dynamics system on the API. What does the program consider to be the design variables, is it the coordinates of the model? If so, in order to make it work, would u_dot just be the acceleration of all the coordinates in the order that they are listed in ...

I am trying to learn about these functions using the SimpleOptimizationExample, because it is set up better than my code. I added a few lines and took a screen shot of them. It seemed that the muscles in this program work properly. I was able to add line 77 to display the muscle activation. This see...

getFiberForce did not work. I will work on creating a simpler code example.

Joel

Thank you for your response, I have attached a copy of my code for reference. I can get the visualizer to iterate through multiple states. These states are generated from data in a csv file. I have also attached the csv file. I am using the model: MoBL_ARMS_module2_4_allmuscles.osim from: https://si...

I tried some of those functions, but when the program reaches them as it is executing, it stops. I do not know why.

Joel

Hello, I am using a model for a simulation. I have defined different states, and I would like to be able to read the forces, tendon lengths, etc at each state. The model uses Schutte1993Muscle_Deprecated muscles. I am able to see the names of these muscles by using: model_1.getMuscles().get(i).getNa...

I was unable to get that code to work. I tried it both before and after the setUseVisualizer(true) command, but the axes were plotted both times. I also tried turning them off from the visualizer window, but that did not work either. Do you have any suggestions on what I am doing wrong? Thanks, Joel