In Vicon ProCalc, navigate to a session folder that contains a C3D file with outputs from Theia3D. This file can be either:
- A C3D file directly from Theia3D
- A C3D file that has been merged with Vicon data after Theia processing (in which case it may also contain marker and analog data).
For information on how a Theia3D file is added to a Nexus session folder and how to merge Theia3D data with a Nexus trial, see Run Theia processing on video files in the Vicon Nexus User Guide.
When you open the file in ProCalc, skeletal data from Theia3D is visualized as a skeleton in the ProCalc 3D workspace:
Each Theia segment is visualized as a bone. Each bone has an axis system that shows the XYZ axes of the bone's local coordinate system, with the axis system placed at the segment's point of origin. The axis system is displayed as follows:
- X-axis: red
- Y-axis: green
- Z-axis: blue
Each segment that is read from the C3D file is interpreted as a ProCalc segment – that is, an entity with a position (the segment's origin) and an orientation in 3D space.
ProCalc now lets you define your own calculations based on the segments.