Minecraft – Different outputs based on item in offhand

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I'm making a Minecraft adventure map in 1.13.2 where the player gets a item that can collect information by right clicking on signs or items with it in their offhand. I only know of one way the sign can give a message in chat: /tellraw. However, I don't want it to show the same message if the player doesn't have this item in their offhand.

I have searched for terms like "minecraft different outputs offhand item" and "minecraft rightclick sign offhand item different" but it seems no one else has this same problem. No one else, as I've seen, has explained how this could even be accomplished.

Best Answer

You'll only need one command to place the sign that will do this. The command is:

setblock ~ ~1 ~ sign{Text1:"{\"text\":\"\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"execute as @p run tellraw @s[nbt={Inventory:[{Slot:-106b,id:\\\"minecraft:stone\\\"}]}] {\\\"text\\\":\\\"You have stone\\\",\\\"color\\\":\\\"green\\\"}\"}}",Text2:"{\"text\":\"YOUR TEXT\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"execute as @p run tellraw @s[nbt=!{Inventory:[{Slot:-106b,id:\\\"minecraft:stone\\\"}]}] {\\\"text\\\":\\\"You do not have stone\\\",\\\"color\\\":\\\"red\\\"}\"}}"}

Swap hands with stone back and forth and right click the sign. Edit sign text as necessary.

This has been tested well, so if something is wrong please let me know and I will try my best to help.

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There is this one character (I don't know what it is yet, either), that sometimes, somehow, makes its way into commands. Try going to the beginning of your /testfor command, and holding -> until you reach the end. There may be a spot where your cursor stops moving, and there should be a zero-width invisible character there. It shows up in regular editing software, I always check if my commands aren't working.

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You can use scoreboard in player selectors to find out which one they clicked. Usually this is done by either testfor or execute.

I recommend a 20 t/s clock to check these as soon as they click it. You don't have to use one, but it may help. great method to setup one.

In the case of testfor, it is actually not recommended to use it. You can't exactly distinguish which player clicked it, you just know that it was clicked. A better way is the execute method. Never-the-less, the command should look like this:

Testfor @a[score_test=1,score_test_min=1]

You will need a comparator to get if it succeeded to find it. You should also have a separate command block for each, then change the 1 to another number for each possible outcome.

In the case of execute: recommended method. You can use @p in the command part to target that specific player. Command as follows:

Execute @a[score_test=1,score_test_min=1] ~ ~ ~ <command>

For this, you should set their score of that to 0 as soon as the command is run, otherwise that command may be run twice.

Best Answer

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