[Question/potential bug] Are negative coordinates supposed to work?

[sebovzeoueb]

I've been using the JavaScript version to do some map generation, and I noticed that it doesn't handle negative coordinates well. Is this intended?

I've just offset my coordinates by a large number to avoid this problem, but I wanted to check.

Also while I was poking around I noticed this function:

function tile(coordinate, period) {
	if (coordinate < 0) while (coordinate < 0)
		coordinate += period;
	else
		return coordinate % period;
}

I'm fairly sure that the else should be removed, right? Otherwise this just returns undefined for a negative coordinate. I was still unable to get satisfactory results from making that change though, so maybe the algorithm just isn't meant for negative numbers?