center
object position
The
object position, as
returned by
llGetPos, is the geometric center (see below) of the
root prim in the
linked set. For a single prim, object center and geometric center are always the same.
geometric center
The
geometric center of a linked set is the average of the
geometric centers of all the prims in the set. This is what
llRezObject uses. See
llGetGeometricCenter.
center of gravity/mass
The
center of gravity/mass is the balance point. If you take a symmetric shape such as a cube prim, the
center of gravity/mass is in the geometric center. If you reduce the top
size of the cube, the
center of gravity/mass will shift towards the thick end because it is heavier. See
llGetCenterOfMass.
object |
prim |
link |
position |
mass