the symmetry plane is the same as one of the coordinate planes ? eg, xy, yz, or zx.
the symmetry plane is known to be one of the coordinate planes, eg yz.
i assume 3) is not true, since that’s your question.
if 1) is not true, it’s easy to center it yourself. just compute the average vertex position and subtract that from each vertex.
if 2) is true, the problem seems trivial.
if 2) is not true, the problem is very non-trivial.
what is AABB ?
oh axis aligned bb.
i have to admit i don’t understand your suggestion.