18:18:50jackdanielregarding calls to floor, I think that I've just assumed that native coordinates are integers (and they are in /our/ case), so it is only natural to have sheet coordinates the same way. other than that I think that there is no reason
18:19:22jackdanielexcept maybe for defensive programming in case, that some code in McCLIM assumes exactly that (i.e forgets to round coordinates), but I don't think there is such code in the codebase