minecraft-commandsminecraft-java-edition
I want to make a command that check how many and what type of items are in a chest and then it will give 12 end portal frames to the nearest player.
I have tried with redstone but it is too big.
The idea is that the player comes to the chest and put in some specific items in a specific order (see image below).
It will then empty the chest give the 12 end portal frames to the player.
This is for a chunk challenge map.
This setup works:
One of your items is an arrow, the other is any non-dispensing item like redstone.
Arrows will fire and miss the tripwire. Items will hit it then burn up, triggering a signal. You can use the items you suggested: arrow, cobble, cobble, arrow and the desired signal will be generated (well, the inverse).
The simplest way to handle this is with a gamerule. If you don't want any mobs bothering you in your creative world, just turn off spawns with /gamerule doMobSpawning false. No mobs will spawn, which will allow you to have a quiet creative world, free from cows, pigs, sheep, chickens, slimes, etc, while also allowing yourself to do science on mobs at will. Mobs will spawn only when you want them to.
If you're really committed to the idea of doing this with /kill, however, you can do this one of two ways. You can set up individual command blocks to kill each type of mob, which might be a small set of command blocks if your main problem is slimes.
Alternatively, you can use the methods described in this answer to select exceptions. It uses a scoreboard to set a score for all entities to 1, and simultaneously sets the score of all exceptions to 0. From there, you can select the set of all mobs excluding any exceptions you want with @e[score_select_min=1].
The simplest and most flexible way to keep slimes from bothering you though is to turn off mob spawning altogether.
Best Answer
You can use
/testforblock:Is something you'll probably understand, depending on your command block experience. If you don't:
X Y Z should be replaced with the coordinates of the chest. "chest" means the command block only returns a success when it's a chest. -1 means it can be any data value, in a chest's case this means any rotation.
Now for the harder part, you should add the blockdata testing:
The slot IDs are numbered from left to right, top to bottom, starting with 0. This means the top left is 0, top right is 8, bottom right is 26.
Item IDs can be found by pressing F3 and H at the same time (which reveals advanced tooltips) and hovering over the item in your inventory. An emerald, for example, would be "minecraft:emerald".
The count part can be anything you like, although I think you'll want it to stay at 1.
And then there's one last thing to do: add a comparator running out of the command block, into a command block that replaces the chest with an empty one, and one that gives the nearest player the frames.
To make filling in the blockdata easier, I recommend this. Just select the
/blockdatacommand, fill in all the slots, then copy the part between curly brackets into your/testforblockcommand.