I'm trying to update the gait2392 model to include a path spring. I used the following script:
# OpenSim: addPathSpring.py #
# --------------------------------------------------------------------------- #
# OpenSim is a toolkit for musculoskeletal modeling and simulation, #
# developed as an open source project by a worldwide community. Development #
# and support is coordinated from Stanford University, with funding from the #
# U.S. NIH and DARPA. See http://opensim.stanford.edu and the README file #
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# Copyright (c) 2005-2017 Stanford University and the Authors #
# Author(s): Ayman Habib #
# #
# Licensed under the Apache License, Version 2.0 (the "License"); you may #
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# copy of the License at http://www.apache.org/licenses/LICENSE-2.0 #
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# Get a handle to the current model and create a new copy
baseModel = getCurrentModel()
pathSpringModel = baseModel.clone()
pathSpringModel.setName(baseModel.getName()+'_path_spring')
# Create the spring we'll add to the model (a PathSpring in OpenSim)
name = 'BiarticularSpringDamper'
restLength = 0.4
stiffness = 10000.0
dissipation = 0.01
pathSpring = modeling.PathSpring(name,restLength,stiffness,dissipation)
# Set geometry path for the path spring to match the gastrocnemius muscle
gastroc = pathSpringModel.getMuscles().get('med_gas_r')
pathSpring.set_GeometryPath(gastroc.getGeometryPath())
# Add the spring to the model
pathSpringModel.addForce(pathSpring)
# Load the model in the GUI
loadModel(pathSpringModel)
# Save the model to file
fullPathName = baseModel.getInputFileName()
newName = fullPathName.replace('.osim', '_path_spring.osim')
pathSpringModel.print(newName)
It successfully clones the model, but when I attempt to open the new model, I receive an error message:
Failed to connect Socket 'parent frame' of type PhysicalFrame (details: Component '3DGaitModel2392_path_spring' could not find '/forecast/BiarticularSpringDamper/bodyset/femur_r' of type PhysicalFrame. Make sure a component exists at this path and that it is of the correct type.
Thrown at component.h:764 in getComponent().).
In Object 'med_gas_r-P1' of type PathPoint.
Thrown at component.cpp:312 in finalizeConnections().
I'm fairly new to OpenSim, so any help would be very appreciated
