Tabletop Simulator: Check for Object Dropped on top

local isSpaceshipOnTop = false

function onObjectDrop(colorName, object)

    --use the objects description field to store the guid, helps during dev when guid changes:
    --local spaceshipGuid = self.getDescription()

    -- hard coded guid:
    local spaceshipGuid = "aaaaaa"

    local objects = Physics.cast({
        origin    = self.getPosition(),
        direction = vector(0, 10, 0),
        type      = 1,
        debug     = true
    })

    isSpaceshipOnTop = false
    for _, obj in ipairs(objects) do
        if obj.hit_object.guid == spaceshipGuid then
            isSpaceshipOnTop = true
        end
    end
end

-- test function to periodically check if the spacehip is on top of the object, runs every 2 seconds
function DoThing()
    if isSpaceshipOnTop then
        print("Spaceship is on top")
    else
        print("No Spaceship found")
    end
end
Wait.time(DoThing, 2, -1)