minecraft-java-editionminecraft-redstone
I'm building an automated farms for several crops, including wheat.
The farm consists of a long cascade of farm fragments:
Seen from side
Currently, I have to manually toggle water off after it reaches the bottom region of the farm.
Is there a way to configure a farm so that the water turns off automatically after the bottom has been reached?
I don't want to use a timer, as I'm looking for a design that is compatible with all tower heights.
Try specifying a maximum search radius, for example:
@a[x=-563,y=4,z=23,r=1]
Note that you can use this shortcut:
@a[-563,4,23,1]
The /clone command is used to copy a region of blocks to another location. It takes 3 sets of coordinates, and optionally a mode which can also have additional arguments.
This is the full syntax:
/clone <x1> <y1> <z1> <x2> <y2> <z2> <x> <y> <z> [mode] [mode2] [TileName]
The first two coordinate sets (<x1> <y1> <z1> and <x2> <y2> <z2>) are opposite corners of a cuboid for the source region, as such:
You should mouse over the block and use the "Looking At" coordinates, or press [Tab], to get the coordinates of a block.
The third coordinate set is used as a place to clone the region to, the destination region. Note that the blocks will go in all 3 positive directions from this point, so you want to specify the lowest northwestern block like this:
The [mode] argument can be filtered, masked, or replace. replace is default and will overwrite all blocks in the destination region with those that are being cloned. masked is similar, but will not overwrite blocks in the destination with air. filtered will only clone the block that you specify in [TileName].
By default the command will give an error if the source and destination regions overlap to prevent glitches and strange inconsistencies; having [mode2] as force will prevent this, and attempt to do it anyway. Setting [mode2] to move automatically fills the source region with air, to give the effect of moving rather than copying. Finally, normal is the default for [mode2]. You will only need to specify normal if you need to give a [TileName] for a filtered [mode].
Best Answer
You can detect the presence of a water stream using a boat and a wooden pressure plate. Place a boat on top of a pressure plate, with walls around it so that it cannot be washed away. If water flows under the boat (in the space not occupied by the pressure plate) at at least water level 3 (out of the 8 possible water levels), it will float up and stop activating the pressure plate.
Here is an example mechanism making a clock out of this. The pressure plate controls the piston to turn on the water whenever the boat is on the plate, so it cycles forever (pictured in the middle of shutting off).
Note that in current versions, boats have visual glitches and may appear to escape the box, especially if you put a lid on top. Don't worry about them — the mechanism will still function fine.
In your case, simply make a channel leading the water out of the bottom of your farm and into a detector like the left half of my picture, and you can then send the redstone output up to shut off the water. Of course, for farming you'll want it to not turn the water back on when the bottom dries up, so add a classic flip-flop:
This will turn the water on when the button is pressed, and turn the water off when the boat detects water.