When we change the heads for the grf,
after IK, the arrows representing the grfs disappear. Does anyone have the same problem?

Since patella has been removed from the gait2392 model, I am wondering where the Quadriceps connect? If we add two DOFs to the knee joint,
will quadriceps pull the tibia during stance in the gait?

It seems that the preview motion data function in version 2.0 has some problems. For the same set of data, I can visualize in ver1.9,but result in crash in version 2.0. Does anyone have the same problems?

<t>Dear Ayman, <br/> <br/> I double check it. It seems that the model 2392 has been changed in the two versions. For the example model 2354 in version 1.9, I can open them in both versions. The human stands on the bottom of the stair in both cases. <br/> But for the model 2392, the story is differen...

<t>Hi Ayman, <br/> <br/> Thank you for your reply. In fact, I find that it also occurs before scaling. I creat a stair.vtp by myself and use it as the ground rather than treadmill.vtp for the model 2392. I open the model in 1.9.1. The human is standing on the bottom of the stair. I cannot update the...

<t>I have develop a model for both OpenSim 1.9 and 2.0<br/> However, when I load the model in the two versions of Opensim. The relative vertical distance between the human and the ground are different. After scaling, , the human is standing on the stair in OpenSim 1.9. However, he seems standing in ...

<t>In the current gait2392 Model, the knee translation is defined as a function of knee flexion. I am wondering if the knee translation is the contact point location relative to the femur center of rotation or something else. <br/> <br/> I go through the literature listed in the model file but canno...

Are you talking about the knee translation and knee flexion coupler?

Thank you very much.
I will look at the information there.

maybe I should say
whether we can run scaling, IK, and SO
in the programming environment by writing some code.
Has anyone done that before?