Defining segments for a Conventional Gait Model
Visual3D BasicsUnit 1:Building your first biomechanical model Chapter 5: Defining segments for a Conventional Gait Model We don’t always have […]
Model building
Defining segments
Chapter 4: Defining segmentsA biomechanical model in Visual3D is made up of a series of segments. In this chapter, we […]
Compute Model Based Data: Segment Center of Gravity, Proximal Joint, and Distal Joint
One of the key features of Visual3D is the ability to track landmarks accurately. However, as you build your pipelines, you may be interested in knowing the relative position of a point on a segment. In this tutorial, we show you how to use Compute Model Based Data to obtain the coordinates of the center of gravity, proximal joint, and distal joint of a segment. We also show you how to do this with respect to another segment, and show you some tricks by creating virtual segments in your biomechanical model.
Resolution Coordinate System
When dealing with vector-based calculations between segments in biomechanics, understanding resolution coordinate systems is essential. Differing from Cardan Sequences and Euler Sequences, using a resolution coordinate system uses all the axes in the chosen segment. In this tutorial, we explain how these biomechanical principles apply to Visual3D.
Defining Segment Coordinate Systems
When dealing with vector-based calculations in Compute Model Based Data, segment coordinate systems are important to apply correctly. In this tutorial, we explain how to use different segment coordinate systems to obtain your data defined in exactly the way you want.
Pipeline commands: Set Subject Height & Mass
This video shows how to use commands in Visual3D to set a subject’s height and mass when executing a pipeline. This makes it easy to use the same biomechanical model on multiple subjects.
Pipeline commands: Apply Model
This tutorial walks you through the Visual3D pipeline commands for automatically applying a model to a static trial and then assigning it to dynamic trials.
Why use pipelines?
Once you’ve established the steps in your Visual3D workflow, you can automate the entire process through a pipeline. This not only saves time compared to manually completing the steps but it also reduces the potential for user error.
Visual3D workflow
This video walks you through a typical workflow in Visual3D: opening motion files, adding calibration files, defining segments, applying models, processing, creating reports, and outputting data.
Landmark definition: target
This tutorial shows how to define a landmark based on an existing target. This allows you to track an anatomical point from the static trial in dynamic trials as well, even if there is no physical marker at that location.
