computer-craft/ninja_turtle

-- A ninja turtle. It likes pizza and lays floors.

--[[
local turtle = {}
local function placeholder() return true end
turtle.up = function () print "turtle.up"; return true; end
turtle.down = function () print "turtle.down"; return true; end
turtle.digUp = function () print "turtle.digUp"; return true; end
turtle.digDown = function () print "turtle.digDown"; return true; end
turtle.dig = function () print "turtle.dig"; return true; end
turtle.forward = function () print "turtle.forward"; return true; end
turtle.turnLeft = function () print "turtle.turnLeft"; return true; end
turtle.turnRight = function () print "turtle.turnRight"; return true; end
turtle.detect = function() print "turtle.detect"; return true; end
]]

local function tostring (x)
  s = ""
  for i,v in pairs(t) do s = s.."{"..type(v).." "..i.." = "..v.."}" end
  return s
end

path = {
  __tostring = tostring,
  points = {}
}

function path:new()
  o = o or {}
  setmetatable(o, self)
  self.__index = self
  return o
end

-- Adds a point to a path
function path:add(x, y)
  table.insert(path.points, {x, y})
end

ninja_turtle = {
  current_position = {0, 0, 0},
  rotation = 0,
  __tostring = tostring
}

function ninja_turtle:new()
  o = o or {}
  setmetatable(o, self)
  self.___index = self
  return o
end

-- acquire a path through the path API
function ninja_turtle:walk(p)

end

p = path:new()
p.add(10, 5)
print(p)