No.  Once we already have computed `origin`, we can use it as `boundary` and setting both `center` and `boundary` would be an error.  That's a nice feature of the current set up.  `origin` will be a kind of canonical `boundry`.  That is, anyone who was using `origin` before should be able to use `boundary` the same way (unless they meant to use `origin` to also change the viewing window.

For this reason, I also did not store `center` and `boundary` in the `params` list -- they are not really needed downstream.