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How to make items from a certain mod undroppable or disappear once dropped?

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Avante last edited by

I'm running a Naruto themed Minecraft SMP server, and I want to prevent the players from giving each other a specific object (the jutsu) from the mod.

How do I make items undroppable or disappear once dropped?
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rosemadder last edited by

/kill @e[type=item,name=jutsu]

Put that in an unconditional, repeating, always active command block. It will kill (disappear) all dropped items with the name "jutsu".

You can also try /kill @e[type=minecraft:item,nbt={Item:{id:"minecraft:egg"}}], but replace minecraft:egg with the namespace and id of the item you want to kill. ( https://www.minecraftforum.net/forums/minecraft-java-edition/redstone-discussion-and/commands-command-blocks-and/2895532-how-to-kill-a-dropped-item-on-the-ground )
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/playsound minecraft:music.game voice @a[tag=sound] ~ ~ ~ 0.3 1 0.1 Does this work for you? Also I changed @e to @a so it would only target players, unless that's what you want.
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It's directly in selector arguments now. So you could use this: scoreboard players set @e[nbt={Item:{id:"minecraft:flint",Count:1b,tag:{display:{Name:"TMNextStage"}}}}] TMNextStage 1 But you could also directly do things for them, for example like this: tp @e[nbt={Item:{id:"minecraft:flint",Count:1b,tag:{display:{Name:"TMNextStage"}}}}] @s Also, if you add type=item to the selector, performance improves, because Minecraft doesn't need to check the NBT of every entity.
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Anyway to have testfor a count of 0? 1.12.2
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It is possible to check the absence of an item in an inventory, as can be seen in this question. However, it is more convenient probably to track the use of items. If you make a scoreboard that tracks stat.useItem.snowball (I'm not sure if that's the exact name, but it looks like that) then you know exactly when somebody threw a snowball. So instead of checking the amount of items in player's inventories, check how many items have been used. EDIT: In order to give a player a new snowball when the old snowball has vanished, you need to keep track of the owner of each snowball. In order to do that, you need two additional scoreboards: One for players IDs, called ID, where each player has an entry with a unique number and one for all the snowballs in the field, called Snowballs. On top of that, you need another scoreboard to do some maths in, called Math. In this answer, I assume that you know how to give each player a unique id in a scoreboard called ID, since this is out of the scope of this question. The most convenient way to achieve this is by using functions, because the function command in 1.12.2 allows you to specify a condition. You need to execute a function at each player for whom there is no snowball in the field with a score that is equal to the id of that player. The following commands initiate the snowballs and initiates your functions on all players that have thrown a snowball: /execute @e[type=snowball,tag=!hasOwner] ~ ~ ~ scoreboard players operation @s Snowballs = @p ID /scoreboard tag add @e[type=snowball,tag=!hasOwner] hasOwner /execute @a[score_usedSB_min=1] ~ ~ ~ function findSnowball This causes the entire function to be executed from the perspective of each player. Next, you need to make a function called findSnowball. This function contains the following commands: # Set the score of each snowball in the math scoreboard to the difference between the score and the current player ID execute @e[type=snowball] ~ ~ ~ scoreboard operation @s Math = @s Snowball scoreboard operation @e[type=snowball] Math -= @s ID # every snowball that has a score of 0 belongs to the current player function giveSnowball unless @e[type=snowball,score_Math=0,score_Math_min=0] The last function gives the correct players a new snowball and resets their scores on the scoreboard. It's called giveSnowball: give @s snowball scoreboard players set @s usedSB 0 This method should work in your situation, given that I haven't accidentally made any mistakes. This method has a few drawbacks, which you should be aware of: This method only works if snowball entities are only created by players: If there are dispensers or snowgolems in the world, then those snowballs will cause trouble. The scoreboard Snowballs accumulates entries. snowballs that no longer exist still remain in this scoreboard and therefore it will start to clutter. I cannot think of a method to reliably clean this scoreboard without causing unexpected behaviour.
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There are multiple things, that might be wrong: Your sleeping scoreboard is misspelled slep, which might cause issues, unless you've have the same misspelling everywhere. You're using <. This compares the score of two players/entities in two scoreboards. Your code would compare the score of @p[tag=avian] in playerheight with the score of 100 in run. What you want is matches: if score @p[tag=avian] playerheight matches ..100. Also note two things: You can check multiple scores at once: execute at @e[tag=avian,scores={sleep=1..,playerheight=..100}] And for the height of a player you don't even need a scoreboard: execute at @e[tag=avian,scores={sleep=1..},y=100,dy=-200]
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There are 3 things you can do: You can just bomb the area with poison/instant damage splash potions You can open the world in MCEdit (which is a phenomenal tool in case you are not familiar with it) and remove the horses from there. It won't be able to correctly render the modded-in blocks and entities, but as long as you don't touch anything except for the horses it should work just fine. You can go to your Minecraft saves directory (C:\AppData\Roaming\.minecraft\saves on Windows, ~/Library/Application Support/.minecraft/saves on Mac) and copy your save to another, stronger computer (maybe ask a pal to contribute his machine for you noble task?) and try to get a higher frame rate there. Hope this helps!
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Giftwrapping used to trigger a glitch which made untradeable items tradable. This glitch has been patched, and those items are still tradable. Today, gift wrap is just used to give untradeable items like the UHHHH to other player in a trade. Because it is patched, they CANNOT be tradable forever. The item will become a carefully wrapped gift upon use. this tool is then allowed to be traded, and the item will be dropped when the gift is opened. But more to the point, items from the cauldron can be gift wrapped. The cauldron itself however, cannot. wiki link:here
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Use this command: /summon item_frame ~ ~ ~ {Facing:1,Item:{id:"minecraft:melon_seeds",Count:1,tag:{display:{Name:Bullets}}}}
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There is no way to set an intrinsic limit to a scoreboard objective (i.e. limit it automatically), but there are several things you can do. In the following, I'll assume an objective called SCORE, which should not go above 10. Double-check the need If the score is not on display, a higher value than 10 might not hurt the mechanics at all. @a[score_SCORE_min=10] works for all scores greater or equal to 10, be it 10, 11, 12 and 6871946. Prevent increasing it in the first place If your score is incremented manually, e.g. with a dummy type objective and scoreboard players add, you can often simply prevent the score from increasing higher than you want with something like scoreboard players add @a[score_SCORE=9] SCORE 1 Be careful though, as you might then end up increasing another player's score instead! To prevent this, make sure the player whose score should increase is uniquely targeted with your target selector and/or his data tags. Reset it to MAX if greater If the above two points fail, it's time to add another command altogether, to reset it to the maximum value if a player goes above. This works for all sorts of objectives, including automatically incrementing ones like stat.X.Y or deathCount. Create a clock (20Hz./Repeat command blocks are ideal), or simply use the one you use anyway (place it before the cap is needed in your commands) scoreboard players set @a[score_SCORE_min=11] SCORE 10 This also works for lower boundaries, which can be useful in some cases: scoreboard players set @a[score_SCORE=-1] SCORE 0 In both of these cases, changing the max can be annoying, since you have to manually edit the commands, and you cannot easily set the cap with commands. Dynamic solution A more sophisticated version would be to use a dummy player - let's call him #MAX (the # makes this name illegal for real players) - and scoreboard players operation. Instead of the command above, use scoreboard players operation @a SCORE < #MAX SCORE Every player's SCORE is now set to the minimum of their own, or #MAX's score. To set the maximum, simply assign #MAX a score: scoreboard players set #MAX SCORE 10 Similarly, a bottom cap can be set (dummy player called #MIN) scoreboard players operation @a SCORE > #MIN SCORE
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This has happened to me. When you open a world in 1.8 (or any post-1.7 snapshot), it changes the way the data is stored (tile entities, blocks and inventory data). This means, for example (using Torches): 50 becomes minecraft:torch. When you open the world back in 1.7, Minecraft goes "What the heck are these?" (minecraft:torch) and therefore deletes it, as it is not recognized as a block/item/whatever. From there, you would find blocks such as signs/chests (item with TileEntity data) and items in your inventory missing. The only way you can get your world back is to restore a backup (if you have one), like I did. If you don't have one, then you'll have to start all over again, as there is no going back once you've opened the save. But if you have a windows 7 profesional you can restore an older version of the file.
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Yes, you made an error in the syntax. score_health_max in an invalid argument. Use score_health instead: /testfor @e[type=Zombie,name=Joe,score_bossHealth_min=1,score_bossHealth=20] That should work. Also, you can (if you don't have another Joe) remove the type=Zombie.
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When checking pre-existing data, you must specify data as it's saved. Count is saved as a byte, so you append its numerical value with a "b". Damage is saved as a short, so you append its numerical value with an "s". Sticks themselves do not have any other damage values besides 0, so you can exclude that tag to simplify the command. /testfor @p {SelectedItem:{id:"minecraft:stick",Count:1b,tag:{display:{Name:"Wand"}}}} Keep in mind though that you're only checking the data for the player closest to the command block. If the closest player doesn't match, the command will fail even if there could've been another player who matched. You would need to use @a instead of @p to check all players. But even then you won't know who matched, just that somebody did. If you need to target that player afterwards, you should not be using /testfor and instead assign a label using /scoreboard. For example, the following will provide players with a "holdingStick" label if they were holding the stick: /scoreboard players tag @a[tag=holdingStick] remove holdingStick /scoreboard players tag @a add holdingStick {SelectedItem:{id:"minecraft:stick",Count:1b,tag:{display:{Name:"Wand"}}}} And you can then target players with that tag: /say Players holding only 1 stick: @a[tag=holdingStick]
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Chunk boundaries and constantly running aparatus do generally not go well together. To fix these issues I'd recommend simply putting a Chunk Loader to load the chunks when you're not there to avoid issues such as this one.
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If you'd like to be excluded from a global selector, simply use a scoreboard to exempt yourselves. This is due to the way entity selectors work, which does not allow you to specify specific players. /scoreboard objectives add noKill dummy noKill Now, tag yourselves for not killing, and run this in a 20Hz redstone clock, in the order it is provided: /scoreboard players set @e noKill 0 /scoreboard players set [Your username] noKill 1 /kill @e[score_noKill=0,score_noKill_min=0,r=100] This way, you're marking everybody to be killed, exempting yourselves (by not making your score 0 and setting it 0 or nothing) then killing those who hasn't been exempted yet. You can add more to the exemption list by adding a block with the following command before the last and after the first command blocks: /scoreboard players set noKill 1 Note: I may have gotten the syntax a bit wrong.
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On Java Edition, press F3+G (press and hold F3, and while holding it, press G). This toggles display of chunk borders.

How to make items from a certain mod undroppable or disappear once dropped?

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