[LUA]Problem with creating a "if holf=true loop"

ok so, i want to create a turtle that does some mining and as soon as it finds a block of diamonds i want it to hold up with everything its doing and wait for the user to either just remove the block or enter some input to the computer.

I thought i had it but it turns out it doesnt quite do what i want :P/>

    --[[Mining Stip Program]]--
	
    --[[Variables]]--
	
    hold=false
	
	
    --[[Functions]]--
	
    function detectDiamond()
	  turtle.select(16)
	  if turtle.compare(true) then
		    hold=true
	  elseif turtle.compareDown(true) then
		    hold=true
	  else
	  turtle.select(1)
	  end
    end
	
	
    function digForward()
	  while turtle.forward() do
		    detectDiamond()
	    turtle.digDown()
	  end
	  for i=1, 3 do
	    detectDiamond()
	    turtle.dig()
	    turtle.forward()
		    detectDiamond()
	    turtle.digDown()
	  end
	  turtle.turnLeft()
	  for i=1, 5 do
		    detectDiamond()
		    turtle.dig()
		    turtle.forward()
	  end
	  for i=1, 5 do
		    turtle.back()
	  end
	  turtle.turnRight()
	  turtle.turnRight()
	  for i=1, 5 do
	    detectDiamond()
	    turtle.dig()
		    turtle.forward()
	  end
	  for i=1, 5 do
	    turtle.back()
	  end
	  turtle.turnLeft()
    end
	
    --[[Execution]]--
	
    while not hold do
	  digForward()
    end

in your function digForward you dig down but move forward, you must change the call to turtle.digDown() by turtle.dig()

Yea because if it can move forward it should and then after it has it's supposed to dig down. nothing wrong with that. And thats not the issue here, the issue at hand is that i cant figure out to keep the program at a hold and then have it continue where it left off.

while true do -- infinite loop
    if hold then
        -- if hold is true
    else
       -- if hold is false
    end
end

Do you want something like that?

The problem is that you have a long sequence inside the loop, and the condition is only verified when you go outside the loop. To call detectDiamond won't stop immediately the loop, the digForward will finish before.

slabb3r, on 30 January 2013 - 06:20 AM said:

The problem is that you have a long sequence inside the loop, and the condition is only verified when you go outside the loop. To call detectDiamond won't stop immediately the loop, the digForward will finish before.

Exactly.

remiX, on 30 January 2013 - 03:06 AM said:

while true do -- infinite loop
	if hold then
		-- if hold is true
	else
	   -- if hold is false
	end
end

Do you want something like that?

yea something like that

Perhaps what you should do instead is have detectDiamond and digForward return a boolean, which you can pass to hold, so the change stays in the loop.

ie.

function detectDiamond()
   turtle.select(16)
   if turtle.compare(true) then
      return true
   elseif turtle.compareDown(true) then
      return true
   else
      turtle.select(1)
   end
end

You can write detectDiamond so that it has a boolean return as above, to be used in a conditional before digging. If you wait until the loop completes after each detectDiamonds check before it affects the turtle's actions, then of course it's going to dig out the diamonds before stopping.