RBX.lua: Checking if a coordinate is in a cuboid

-- I personally think the variables should be local since you might be using this in a coroutine or in some other weird multitasking scope

local corner1 = Vector3.new(-12, -12, -12) -- corner1 of the cuboid
-- corner1 < corner2 in EVERY ordinate or it won't work!
local corner2 = Vector3.new(12, 12, 12) -- corner2 of the cuboid
local checkme = Vector3.new(0, 0, 0) --coordinate we want to check

local d = corner2 - corner1
local c = corner2 - checkme

if d.x >= c.x and d.y >= c.y and d.z >= c.z then
    --it's true, the object is in the cuboid
end