Minecraft /testfor Players Using Items

minecraft-java-edition

I am trying to create a hydration system for my Minecraft adventure map that displays hydration levels on the scoreboard. To restore the players hydration a player should need to drink a water bottle, and so I figured this command would do the trick: /testfor @p {stat.useItem:373}

However I receive an error: (player) did not match the required data structure

Does anyone know why I recieve this error and if there is any way to make the command work? (preferably without using scoreboard values instead as I want to use the scoreboard values to display the hydration levels themselves)

Best Answer

stat.useItem is not a NBTag, it's a scoreboard objective type. Moreover, if it even was an data tag, you'd be testing for someone who has used an item 373 times, not someone who's used water once.

You are going to need to use scoreboard objectives for this. I feel like your concern may be a misunderstanding though; you can have as many different objectives as you want, and don't have to display the ones you don't want to be seen.

To set up this objective, type:

/scoreboard objectives add drankWater stat.useItem.minecraft.potion

You can then test for people who drank water like this:

/testfor @a[score_drankWater_min=1]

And reset their score to 0 like this:

/scoreboard players set @a[score_drankWater_min=1] drankWater 0

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Minecraft – Using Mathematical Operations in /testfor command in Minecraft

The /scoreboard command allows you to perform operations with player's scores.

To make it so that test3 = test + test2 for all online players, do something like this:

execute @a ~ ~ ~ scoreboard players operation @p test3 = @p test
execute @a ~ ~ ~ scoreboard players operation @p test3 += @p test2

That makes everyone set their test3 score to their test1 score, and then add onto that their test2 score.

This is only sets their test3 score once (it won't automatically always be test + test2 now), so you'll need to do this on a clock or just before you /testfor a certain test3 score.

Minecraft – Testfor multiple dropped items

If you're trying to detect identical items, you could use the selector
/testfor @e[c=1,type=Item] {NBT}
This will only select one item (the closest, I believe). You could then use the scoreboard to tag/mark the item and do another search which excludes that item. If you are detecting the same item, but can differentiate them, such as different custom names, enchants, stacksize, etc. you can get those values via NBT. Refer to the Wiki page on NBT format for more info on the differnt tags you can use, and how to get to them.

Best Answer

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Minecraft – Using Mathematical Operations in /testfor command in Minecraft

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