Lua script wont accept args

Question

I was trying to get an hologram projector working, but in run into these errors:

bad arguments #3 (number expected, got no value)

My script is:

local component = require("component")
local hologram = component.hologram

function setVoxel(x, y, z, value)
  print(x)
  print(y)
  print(z)
  print(value)
  local current = hologram.get(x, z)
  local positiveMask = bit32.lshift(1, y - 1)
  if value then
    hologram.set(x, z, bit32.bor(current, positiveMask))
  else
    local negativeMask = bit32.bnot(positiveMask)
    hologram.set(x, z, bit32.band(current, negativeMask))
  end
end

local args = {...}
print(args[1])
print(args[2])
print(args[3])
print(args[4])
setVoxel(tonumber(args[1]), tonumber(args[2]), tonumber(args[3]), args[4])

I used:

holo-set 8 16 20 true

The print commands returned:

8
16
20
true

but its not working. I have checked the spelling. Also the hologram is correctly initialized.

What does "opencomputers" mean? There's no description, and this is the only question with that tag. (I presume "minecraft" is somehow relevant, but I don't see anything about it in the question.) — Keith Thompson, Aug 09 '14 at 20:52
@KeithThompson I imagine (read: My best guess) opencomputers is the mod he is using to get computers in Minecraft. — TMH, Aug 28 '14 at 10:50

score 1 · Accepted Answer · answered Aug 07 '14 at 15:15

That error means some function (what's the rest of the error?) which expected to get three arguments only got two.

Given that code snippet the only function I can see to which that might apply is hologram.get.

Which, given a quick look at the documentation (thank you Google), does in fact appear to require three arguments.

get(x:number, y:number, z:number):number
Returns the value at the specified position.

Lua script wont accept args

1 Answers1