function tocell(vec)
	return Vector3.new(math.ciel(vec.x/cellsize),math.ciel(vec.y/cellsize),math.ciel(vec.z/cellsize))
end

function toworld(vec)
	return (vec-Vector3.new(.5,.5,.5))*cellsize
end

function cellsinrange(pos,radius)
	local diameter=math.ciel((radius*2)/cellsize)
	local hdiameter=diameter*.5
	local cells={}
	for xcell=1,diameter do
		for ycell=1,diameter do
			for zcell=1,diameter do
				local cellpos=tocell(pos+toworld(Vector3.new(xcell-diameter,ycell-diameter,zcell-diameter)))
				if (toworld(cellpos)-pos).magnitude<=radius then
					table.insert(cells,Vector3.new(cellpos.x,cellpos.y,cellpos.z))
				end
			end
		end
	end
	return cells
end