Is there a way to have the tetrahedron's central axis point actually be in its center. When I create the object, then rotate it, it rotates asymmetrically. Regardless of setting it to 'Center' or 'Basis' or making other changes.
The pivot point is located at the centre of the surrounding box, which in the case of the tetrahedron is off-centre of the mesh.
You can set the pivot point to anywhere you want it to be, as long as it is a vert, by right-clicking and selecting "Set pivot point". So you would need to either cut in some edges to get a vert located at the centre, or you can make a facet, place it so that one of the verts is at the centre-point and set the pivot point to that.
Bit of a nuisance, but not that difficult to do:)
Be aware, though, that when you take the mesh into a rendering app, it will not respect the re-set pivot point and will set it to the centre of the bounding box. So, changing a pivot point is only useful during the modeling process and won't be of any use further down the line in the animation process.
Thanks Roygee! It didn't make sense to me until you explained it that way.
Oh what fun, so where is the centre of a tetrahedron ?
Roy, no, don't even go there :)
You can create the Tetrahedron from its center (see right hand side options), so you can snap to a vertex when creating.
Once created, use the "set pivot point" and snap the pivot back to creation center.