The_End/mods/maps/map_making_toolkit/command_basics.lua

local function parse_int(str)
	local negative = string.match(str, "[%-]")

	local num = string.match(str, "[%d]+")

	local sign = (negative and -1) or 1
	local value = 0


	for d in string.gmatch(num or "", "%d")
	do
		value = value * 10 + d
	end

	return sign * value, type(num) == "string"
end

function map_making_toolkit.parse_args(param)

	local vectors = {}
	local i = 1
	for str in string.gmatch(param, "([%-%d]+)")
	do
		local n, worked = parse_int(str)
		if not worked
		then
			return false
		end
		vectors[i] = n
		i = i + 1
	end
	if not i == 7
	then
		return false
	end

	return true,
		vector.new(vectors[1], vectors[2], vectors[3]),
		vector.new(vectors[4], vectors[5], vectors[6])
end