Hi Carmichael, Thank you for the reply! The issue in my case is that the reference frames of the bodies are different (they were defined using different methods so there will always be an offset in orientation and position between reference frames of the same bodies). Our main goal is to evaluate if...

Hi! I've recently developed a method to create OpenSim models from medical images and I am trying to validate my models using validation models, but I've been running into some issues and was hoping for ideas on how to solve them. I'm working on patients with scoliosis and I am trying to create more...

Hi Nicos,

Thanks for your reply.
I think using the method findTransformBetween() will be the best way forward for my application, thank you for this info!

Best,
Birgitt

Hi! I've been trying to calculate the orientation error (in degrees along each rotation axis X/Y/Z) between the bodies of 2 models. One model was defined using medical images in a specific 3D pose, while the other model is simulated to that pose. The validation model was defined before and in it's n...

Thanks for the answer, that seems indeed like a good solution for handling the bushing elements in my models! I was just wondering whether an approach like this would also work to alter the reference frame of the body? I am afraid that not having them aligned might affect the results I get when calc...

Hi! I'm currently working with image-based models of the spine (created by a former colleague of mine). I am trying to model the stiffness of the intervertebral joints using OpenSim ExpressionBasedBushingForces, but I have ran into an issue that I am not able to resolve. To use the bushings, it's im...

Hi, I am trying to model spinal alignment in scoliosis patients, and therefore I need to adjust the lines of action of spinopelvic muscles. I was looking into using the wrapping torus for a specific application where I wanted to let some of the muscles wrap on the outside of the torus, and others on...

Hi! I am having difficulties to work in OpenSim due to the set-up of my computer (which has a certain set-up that does not allow me to run OpenSim as a non-administrator). Therefore, I am trying to make sure my account has the same settings for OpenSim as an administrator, but the log files do not g...