Bounding Box Definition

This reference will help you understand how the Bounding Box origin and lengths are defined.

Bounding box originThe bounding box origin is positioned at the corner of the box with the minimal coordinates in the center of gravity's axis system. The orientation values of this axis system are available under the Principal Axis section in the Inertia G tab of the dialog box:
  • A1X, A1Y, A1Z correspond to the u axis vector (red axis).
  • A2X, A2Y, A2Z correspond to the v axis vector (green axis).
  • A3X, A3Y, A3Z correspond to the w axis vector (blue axis).

Coordinates of the bounding box origin appear in the CSV file under the BBOx, BBOy, and BBOz columns.

Bounding box lengths

The bounding box lengths correspond to the length of the box along the axis system's axes:

  • BBLx is the length of the box along the u axis.
  • BBLy is the length of the box along the v axis.
  • BBLz is the length of the box along the w axis.

For more information, see the following Best Practice: Understanding the Measure Inertia Bounding Box CVS Exported Columns.