> My first thought was to make a solid ring and another solid object in the shape of the hammer head
> (basically just an egg-shaped solid). Then boolean diff the hammer in lots of random spots around the ring.

> A procedure could make short work of that.

It would, but it might require a lot of analytic math to correctly position the "hammer" before each "blow". I haven't delved into every nook and cranny of the Javascript API yet enough to know if those kinds of interfaces are being exposed in the API. If not, then a PhD in Math is going to come in might handy in addition to some Javascript programming chops ;-)