Although we typically use Visual3D for segment-based data, tracking the motion of a specific target has proven to be a very interesting feature for the field of Biomechanics. Using motion capture systems to obtain the 3D coordinates of a marker is essentially what they are designed to do. However, using Compute Model Based Data we can also track the path of a target with respect to any coordinate system defined in our model, including body segments.
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.
A common but misunderstood biomechanical calculation is joint power. As a feature in Compute Model Based Dataj we have scientifically validated methods to obtain it. However, it is important to understand that both of these model based items are to calculate scalar values. In this tutorial, we explore how to use Joint_Power and Joint_Power_Scalar and explain the difference between them.
A properly built a biomechanical model in Visual3D is a very powerful tool, one of the advantages is the ability to perform calculations through Compute Model Based Data. In this tutorial, we show you how to calculate the joint moments, and highlight the difference between using a resolution coordinate system or a Cardan sequence.
If you have already built a biomechanical model in Visual3D, you can use it to perform biomechanical calculations through Compute Model Based Data. In this tutorial, we show you how to calculate the joint forces, and highlight the difference between using a segment coordinate system or a Cardan sequence.
Although your force plata data is most likely already synchronized with your motion capture data, in Visual3D, you can recalculate your data to make it easier to interpret based on the coordinate system that is most convenient for you.
Center of pressure is a key historically reported parameter in biomechanics. In this tutorial, we show you how to use the Compute Model Based Data function to calculate the center of pressure path and how to tweak the pipeline command in order to get exactly what you want from your data.
Joint kinematics are a staple element of motion capture biomechanics reporting. In this tutorial, we show you how to use the Compute Model Based Data function to calculate joint velocity and acceleration.
Calculating the joint angle is a key contribution to biomechanics by the Compute Model Based Data feature. However, the rotation between two segments is very complex, and a simple joint angle calculation may not be sufficient to describe the motion. In this tutorial, we show you how to use the joint rotation fuction.
As you learn more about the Compute Model Based Data function in Visual3D, you will realize that it goes far beyond an easy-to-use interface. As a pipeline command, you have full access to all of the same features in the GUI, but can use the text version to improve automation through scripting your custom pipelines. In this tutorial, we give you an overview of how to modify the Compute Model Based data pipeline command.
