Thanks!

Hello all,

If I have a model with contact forces and run a Forward Kinematics simulation of just the model falling into the ground, is there an easy way to output the contact forces that are calculated during the simulation?

Best,
-Andy

Hi Ayman, This indeed solved the problem, both in the GUI and API. However, I think there might be a bug. Once I set "solve for equilibrium" to true in the GUI and run once, subsequent runs with the Forward Tool with the option set to false have the correct results. Anyways, I'm glad you were able t...

One thing I just noticed, is if I run the Forward Tool first, the results are wrong. If I then click simulate with the same initial conditions, the results make sense. THEN if I run the Forward Tool, the results are correct and match the "Simulate" results. The problem is that I want to crank throug...

Hi everyone, I'm having an issue where the results in the first second of simulation change significantly between simulations with the Forward Tool in OpenSim 4.4. The model is relatively simple, modified Gait2354 with no actuator controls, and the joints have coordinate limit forces (I've simplifie...

Dan, thanks so much! This is very helpful!

Hello Ayman, Yes, I tried this but it still does not recognize OpenSim. From a normal python terminal if I do this it then doesn't find simbody. I'm not sure where the hiccup is but I was able to get a Matlab license to write my optimizations. If I can figure out what I'm doing wrong I'll post to th...

Hi all, It's been a while since I've used the OpenSim API and first time with Python, though I use Python pretty frequently. I'm currently using Python 3.9, OpenSim 4.3, and PyCharm for my IDE. After following the instructions for configuring OpenSim to use the Python API in Windows, everything appe...