ExpressionBasedCoordinateForce

[Jonathan Mortensen]

Hi everyone, I am having a problem with the ExpressionBasedCoordinateForce. When I try to add it to my model.osim file I get the error:

'ExpressionBasedCoordinateForce' is not a registered Object!
Object type ExpressionBasedCoordinateForce not recognized

Is this object no longer working for OpenSim? Any help would be great.

[Dimitar Stanev]

Hi,

If you are adding this through the C++ API, then you need to register the force so it can be recognized by OpenSim.

Code: Select all

OpenSim::Object::registerType(OpenSim::ExpressionBasedCoordinateForce());

Best

[Jonathan Mortensen]

Is there a way to do this just by editing the xml file? I would like to add it straight into my model and run it in the GUI.

[Dimitar Stanev]

I am not sure if it is possible, through GUI. Maybe through scripting. If you want to use it through the GUI maybe you can implement a very simple plugin that registers the ExpressionBasedCoordinateForce. See the examples in the sdk folder.

Best