Hi all, I am solving for muscle lines of action with the plugin MuscleForceDirection and when using the global frame of reference it causes a system crash (using OpenSim GUI or Matlab) in the newer OpenSim versions (4.3 and 4.4). I have seen one other post saying that any version of OpenSim newer th...

Hi all, Is there a way to visualize the muscle coloration from the activation file in the MATLAB API? I can do it with the kinematics, but also want the muscles to be changing colors in the video. I have looked through the VisualizerUtilities but don't see anything mentioning the coloration or the s...

Hi John, Thanks so much for the guidance and code- this was a huge help! I implemented the code you gave for MuscleForceDirection and it runs great within Matlab. I did start with the MuscleForceDirection template and tacked on the other two analyses (static optimization and muscle analysis) all und...

Hi all, I am trying to use the plugin 'MuscleForceDirection' within a Matlab code. I have tried two options and want to know if there is any way this can work better. 1. I would love to be able to use the AnalyzeTool within Matlab to run StaticOptimization, MuscleAnalysis, and MuscleForceDirection a...

Thank you, Carmichael! This worked great.

Hello, I'd like to downweigh the tibia and foot IMU sensors for the IK calculation in OpenSense. I know how to do this on the GUI, but want to be able to do it on Matlab for faster processing. Here's what I currently have: imuIK = IMUInverseKinematicsTool(); imuIK.set_orientation_weights(); I am uns...

I have an OpenSense IMU model that seems like it is running into issues because one single sensor needs to be rotated in relation to the set. Is it possible to rotate a single sensor? I cannot find the option on the GUI (only can rotate all sensors in relation to OpenSense coordinate system). If the...

Thanks for the quick response, Ayman! That gave me a good start. Here is the code I currently have running. import org.opensim.modeling.* addpath ('C:/OpenSim 4.3/bin') modelFileName = 'Rajagopal2015_opensense_calibrated.osim'; % The path to an input model model = Model(modelFileName); state = model...

I am looking to find trunk flexion angle with OpenSense during sit-to-stand trials. The model runs great and simulation looks correct. However, I would like to find the angle of the torso to the earth (OpenSim coordinate system) and do not see it in the motion output from OpenSim. The only outputs s...