[lua] [question] Quarry, Whats the best way to deal with gravel for my program?

I have made a simple quarrying program. you can edit the hight, width and depth by actually editing the program. Everything works fine if I use it in an area without gravel. The problem is when there is gravel more than one block high that can fall down.

length = 20
l = 0
width = 20
w = 0
depth = 40
d = 0
R = 1
i = 0
function checkfuel()
if turtle.getFuelLevel() < 10 then
  turtle.select(16)
  turtle.refuel(1)
  turtle.select(1)
end
end
function layer()
    for w = 1, width do
	    for m = 1, length do
		    checkfuel()
		    turtle.dig()
		    turtle.forward()
	    end
	    if w == width then
		    checkfuel()
		    turtle.turnLeft()
		    turtle.turnLeft()
	    else
		    if R == 1 then
			    R = 0
			    checkfuel()
			    turtle.turnLeft()
			    turtle.dig()
			    turtle.forward()
			    turtle.turnLeft()
		    else
			    R = 1
			    checkfuel()
			    turtle.turnRight()
			    turtle.dig()
			    turtle.forward()
			    turtle.turnRight()
		    end
	    end
    end
end
for d = 1, depth do
    checkfuel()
    layer()
    turtle.digDown()
    turtle.down()
end

I have tried a couple of different methods of dealing with gravel. They seem to work when i'm just testing it out, but with the quarry, it needs to move forward only a certain amount of blocks. The gravel is messing with the count. Both of the ones below don't work. Any help will be appreciated.

function gravel()
    if not turtle.forward() then
	    repeat
		    turtle.dig()
		    sleep(0.2)
	    until turtle.forward()
    end
end

function gravel()
    if not turtle.forward() then
	    repeat
		    turtle.dig()
		    sleep(0.2)
	    until turtle.forward()
	    turtle.back()
    end
end

Just change all 'turtle.forward()' s with

while not turtle.forward() do
    turtle.dig()
    sleep(0.4) -- needs to sleep for 0.4 because that's the time the block takes to fall or something.
end

while not turtle.forward() do
  turtle.dig()
  sleep( 0.4 )
end

OFF TOPIC: could also add following check if running CC1.4, as mobs can stop movement too

if not turtle.dig() then
  turtle.attack()
end

TheOriginalBIT, on 13 January 2013 - 01:27 PM said:

while not turtle.forward() do
  turtle.dig()
  sleep( 0.4 )
end

Using this, would I replace the turtle.forward()'s like remiX said or would I put it before?

fauxiss, on 13 January 2013 - 01:38 PM said:

TheOriginalBIT, on 13 January 2013 - 01:27 PM said:

while not turtle.forward() do
  turtle.dig()
  sleep( 0.4 )
end

Using this, would I replace the turtle.forward()'s like remiX said or would I put it before?

It's the same code.

But also add what he said about attacking the mobs if you're using CC1.4

remiX, on 13 January 2013 - 01:42 PM said:

It's the same code.

Yeh I didn't get that "See 1 new post" thing…

remiX, on 13 January 2013 - 01:42 PM said:

But also add what he said about attacking the mobs if you're using CC1.4

does this work to combine the two together?

while not turtle.forward() do
   while not turtle.dig() do
	  turtle.attack()
   end
   sleep(0.4)
end

yes that works :)/>



EDIT: If you don't want to replace all the turtle.forward() with the for loop, and feel confident enough with your coding skills, look at the following spoiler
Advanced coding, overriding turtle.forward's functionality:

Spoiler

Add at the top of your script

local oldF = turtle.forward
turtle.forward = function( times )
							 if not times then times = 1 end
							 if type( times ) ~= "number" then error( "Invalid parameter: expected number, got "..type( times ), 2 ) end
							 for i = 1, times do
								 while not oldF() do
									 while not turtle.dig() do
										 turtle.attacK()
									 end
								 end
							 end
						 end

Add to the VERY end of your script

turtle.forward = oldF

you can then use it like this

turtle.forward() -- moves it forward once allowing for gravel and mobs
turtle.forward( 4 ) -- moves it forward 4 times allowing for gravel and mobs
turtle.forward( "4" ) -- this is wrong and will error!

Thanks ill look through that. I like to understand how it works before just using it so that I can branch off of it if need be.

fauxiss, on 13 January 2013 - 02:06 PM said:

Thanks ill look through that. I like to understand how it works before just using it so that I can branch off of it if need be.

Basically it stores the old forward function so we can restore it later, then it makes forward a new function that moves and checks for gravel just like the code before… there is some validation in there too to see if you called

turtle.forward()

or

turtle.forward( 4 )