OpenSim related files that are used in these examples for download.
This example is for a standard OpenSim “gait” model (such as gait2392_simbody.osim or gait2354_simbody.osim).
What Visual3d does is:
Step 1) Scales the model to fit the subject. (The scaling is written to a _ScaleSet.xml file called Visual3d_ScaleSet.xml.)
Step 2) It then computes the center of pressure in the foot coordinate system and stores this in memory.
Step 3) Next does its own Inverse Kinematics so you do not have to use the OpenSim IK.
Step 4) After the inverse kinematics, the center of pressure is transferred back from the foot coordinate system into lab space so the relationship between the center of pressure and the model is maintained. Visual3d should handle the center of pressure data seamlessly.
Step 5) Visual3d then exports the model's degrees of freedom (pelvis motion and joint angles), the ground reaction forces and the center of pressure to a single *.mot file. (File name Visual3d_SIMM_input.mot).
With the process no trc files are need and all the kinematics, ground reaction forces and center of pressure are contained in a single .mot file.
Once steps 1-6 are completed, Visual3d will have updated the Visual3d_Scale_ScaleSet.xml file and have created a Visual3d_SIMM_input.mot file which can be loaded into OpenSim.
At this point the users should be ready to run the OpenSim Residual Reduction Algorithm by loading the file: Visual3d_Setup_RRA.xml. OpenSim CMC and Forward Simulation can subsequently be run by using the files Visual3d_Setup_CMC.xml and Visual3d_Setup_Foward.xml.