Terminology for different kinds of ‘center’?

Mathematically there are various ways to calculate a spacial center point. (2d or 3d).

  • Barycenter (sum of all positions divided by the total number of points)
  • Bounding box center (typically the middle of the bounds on each axis).
  • Center of mass (exact calculation depends how mathematically accurate you want to be, weighting by edge-length can be used for example, for 3d volumes face area can be used).

In graphical applications I've seen centroid, median-center... and other terms used which don't correspond to their mathematical definitions (on Wikipedia at least).

For the purpose of a graphical application rotation or scale pivot point (for non-technical users),
what are acceptable terms for different kinds of 2d / 3d center?

The application uses all these kinds of center, and the target audience is artists / animators (possibly architects, engineers too, though thats less of a focus).

Tags: