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Overview of Vicon Nexus 2 modeling

Modeling in Nexus 2 has undergone substantial changes to provide improvements to the approaches adopted in earlier versions of Nexus.

With Nexus 2, you can continue to use both Plug-in Gait and the Oxford Foot Model in the same way as before. For more information, see Modeling with Plug-in Gait.

In addition, to provide a widely accessible environment in which to develop custom models, Nexus 2 makes it easier to model with both MATLAB and Python. For more information, see Modeling with MATLAB and Modeling with Python.

Tip:          For research and experimental purposes, a version of Plug-in Gait in open MATLAB script is also available. For further details, contact Vicon Support.

About modeling terminology

Just as modeling within Nexus has undergone improvements, so the language used to describe it, both within Nexus itself and within the accompanying Help and other documentation, has been refined. To gain a clear understanding of the way modeling is represented in Nexus, bear in mind the following definitions:

Modeling This term is applied to:

–           Calculations that occur after labeling

–           Maths/models that produce:

–           Biomechanical definitions of segments and joints, etc.

–           The creation of variables for analysis

Important:   During the labeling process, you calculate joints, segments, bones, parameters and variables. These are labeling skeleton definitions.

After labeling, the modeling process produces segments, bones, parameters and variables; and other information used for analysis.

The following examples show the distinction between labeling and modeling:

❙     Labeling: VSTs/VSKs, subject calibration (labeling calibration)

❙     Modeling: PlugInGait.MOD, scripts in Bodybuilder, PECS, MATLAB calculations