turtle location

moveturtle.lua

args = { ... }

X = 0
Y = 0
Z = 0
R = 0

R = tonumber(args[1])

Fx = 1
Fy = 0


function CheckR(msg)
  -- print(msg .. ": X:" .. X .. " Y:" .. Y .. " Z:" .. Z .. " R:" .. R)
  if (X * X + Y * Y + Z * Z > R * R) then
    return true;
  end
  return false;
end

function MoveForward()
  if turtle.getFuelLevel() ~= "unlimited" and turtle.getFuelLevel() < 10 then
    turtle.refuel()
  end

  if turtle.detect() then
    turtle.dig()
  end
  turtle.forward()

  X= X + Fx
  Y= Y + Fy
end

function TurnRight()
  if (Fx==1 and Fy==0) then
    Fx = 0
    Fy = 1
  end
  if (Fx==0 and Fy==1) then
    Fx = -1
    Fy = 0
  end
  if (Fx==-1 and Fy==0) then
    Fx = 0
    Fy = -1
  end
  if (Fx==0 and Fy==-1) then
    Fx = 1
    Fy = 0
  end
  turtle.turnRight()
end  

function TurnLeft()
  if (Fx==1 and Fy==0) then
    Fx = 0
    Fy = -1
  end
  if (Fx==0 and Fy==-1) then
    Fx = -1
    Fy = 0
  end
  if (Fx==-1 and Fy==0) then
    Fx = 0
    Fy = 1
  end
  if (Fx==0 and Fy==1) then
    Fx = 1
    Fy = 0
  end
end  


while CheckR('fwd') do
  MoveForward()
end