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Trying to detect when a player has a certain helmet on their head

T
tahishae last edited by
I want to make a helmet that, when placed on a users head, gives them Night Vision. But for some reason I am having a hard time figuring this out, it seems that it is unable to detect custom tags which is weird because I have had no issues with this whatsoever in the past, but I am a tad bit rusty so it's probably something simple that I have just forgotten.

My code is as follows:
```
execute as @e[nbt={Inventory:[{Slot:103b,id:"minecraft:leather_helmet",tag:{NVG:1b}}]}] run effect give @s minecraft:night_vision
```
I found the issue, the give command I was using:
```
/give @s leather_helmet{tag:NVG}
```
does not work, does anyone know the proper syntax for this command?
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1 Reply Last reply
morde last edited by

I was stupid, apparently when tagging items with the /give command you do not need to specify tag:

The correct command for this would be /give @s leather_helmet{NVG:1b}
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mcupdate.tumblr.com, with which you can subscribe to with RSS, seems to reliably report the latest version as the newest post with the title Minecraft [x.x(.x)]. EDIT I'm slightly drunk, and feeling bashy, so here's a command that will return the latest version of Minecraft: curl -s http://mcupdate.tumblr.com/rss | egrep -o -e 'le>Minecraft [0-9]\.[0-9]\.[0-9]|le>Minecraft [0-9]\.[0-9]' | head -1 | egrep -o -e '[0-9]\.[0-9]\.[0-9]|[0-9]\.[0-9]'
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Will `/scoreboard players tag` remove tags from ineligible players/entities that were previously tagged?
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No, the tag won't be removed automatically. You can test this yourself by placing the following command in your command block chain: /tell @p[tag=InAir] Jumping After jumping the first time, you will continuously receive the "Jumping" message, even after you return to the ground. What you need to do, similar to what you've done in the past with scoreboard objectives used in boolean tests, is clear the tags of everyone before reapplying them to those you want tagged. In your example, you'd use the following command: /scoreboard players tag @a remove InAir which is the obvious counterpart to the the add version of the command, but that's not stated in the wiki. I should note that I haven't tested to see if the remove version also accepts the data tag, but I suspect it does. That would allow for some interesting logic.
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Game Testing • minecraft java edition minecraft classic • • Rossere

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EmeraldEye's answer works, but it removes all information on what team someone was if teams were used already. You could instead use tags, but there is an even easier way, in one command: /execute at as @a unless entity @s[distance=0] run kill @s This is easy to write, but hard to understand. What this does is first shifting the execution position to the player you want to not kill, but still executing as whatever executes the command (a command block for example). Then it changes the execution context to be done by all players, without changing the position where it executes. It also splits up all further parts of the command, so that they run once per player. Then it checks if the selected player has distance 0 from the execution position (which is still the one player's position that you don't want to kill) and if they do not have distance 0, they get killed. The advantage of checking for distance 0 and negating the selection is that it also selects people in other dimensions, unlike something like if entity @s[distance=0.001..] would do. Keep in mind that this command will not kill players that are on the exact same position as the player you don't want to kill. But that can only happen in rare situations like respawning, dismounting a minecart at a fixed position, teleporting, … and then not moving before the other player does the same.
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No. There isn't. Especially not on the ladder. Then you could say "Block everyone else in the top 200", and you'd never lose! (if you were good enough to beat everyone else)
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How do I set a command block in Minecraft 1.9 to send out a redstone signal whenever it detects a player on a specific type of block?
Game Testing • minecraft java edition minecraft classic • • tahishae

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The /execute command will allow you to detect blocks relative to a player. The syntax is: /execute So, you can run the following in the command block: execute @p ~ ~ ~ testforblock ~ ~-1 ~ snow The above will give a redstone signal when it successfully finds a snow block below the player, which is what your question asks. However, using testfor commands and comparators for something like this is generally a bad idea; how will you know what block to delete 2 seconds later when the player has moved away from it, for example? Plus it'll be completely incompatible with multiplayer. You may want to, instead, use the /execute command's detect syntax, which allows you to detect a block from an entity, then run a command from the same entity if that block was found. You could use this to delete the block that was found, or summon a marker stand to delete it after a delay: execute @a ~ ~ ~ detect ~ ~-1 ~ snow 0 summon ArmorStand ~ ~-1 ~ {Marker:1b,Invisible:1b,NoGravity:1b,Invulnerable:1b,CustomName:"BlockRemover"}
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Setup: scoreboard objectives add Health dummy Tag the entity you want to track. In this answer, the tag myEntity will be used. You should also know how much health your entity has. Use /data get entity @e[tag=myEntity] Health Command blocks: Repeating, Unconditional: execute as @e[tag=myEntity] store result score @s Health run data get entity @s Health Chain, Unconditional, Always Active: execute if score @e[tag=myEntity,tag=!health_reached,limit=1] Health matches 20..40 Chain, Conditional, Always Active: tag @e[tag=myEntity] add health_reached Chain, Unconditional, Always Active: say myEntity has between 20 and 40 Health Your command blocks should look like this: You can add more Chain, Unconditional, Always Active blocks to the end of the chain to have more things happen when myEntity reaches 20-40 Health.
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You will need to assign a label to the player based on their NBT data first and then target based on their label. /testfor will not be useful as it does not label the players that were found. 1.9 No objectives needed. /scoreboard players tag @a[tag=HasItem] remove HasItem /scoreboard players tag @a[tag=!HasItem] add HasItem {Inventory:[{id:"minecraft:nether_star"}]} And then you'd target them with the tag parameter. /effect @a[tag=HasItem] minecraft:strength 1 3 1.8 Objective required. /scoreboard objectives add HasItem dummy Run on a clock in presented order. /scoreboard players set @a HasItem 0 /scoreboard players set @a HasItem 1 {Inventory:[{id:"minecraft:nether_star"}]} Players will have their "HasItem" score set to 1 if they have a nether star in their inventory. You can then target them based on their score. /effect @a[score_HasItem_min=1] minecraft:strength 1 3
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I used something similar to add a welcome back message to a server I play on, and unfortunately, once the player leaves the game, their score cannot be incremented until they rejoin. I tried finding a solution to this by using an ID system and checking for who is not online but marked as online in a dummy objective (using 1 and 0 as online and offline flags) and setting their here score to 0, but because you can't test for the scores of players who are not online without explicitly naming them, the system does not work. Hopefully someone else can come up with a different solution to your problem, however.
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When a chunk is populated, the dungeon generation is always tried 8 times independently at random positions in the chunk. For each generation, given a random size (5x5, 5x7, or 7x7, excluding walls), a dungeon is generated only if the ceiling and floor blocks are solid and there are 1~5 air blocks in the lower half of the surrounding walls. Possibility? That's complicated to calculate because the probability distribution of air blocks is more complicated and that depends on this. However, you can certainly qualitatively assert that double dungeon is rare. I assert the existence of triple dungeon.
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As the previous answer said, you can assign more RAM to your Minecraft (DO NOT assign all of your RAM to it, that can overload your computer), but you can also enable Advanced OpenGL. That should drastically increase your FPS and also just make the game run more smoothly in general.
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When trying to run Minecraft on OS X systems, the launcher tries to use Java 6 for Mac by default. This is because Apple used to ship their own version of Java (SE 6) with the operating system (mainly for security reasons). In recent versions of OS X, however, Java is no longer included, hence the error message you're seeing. There are two ways to solve this issue. Option 1 - Install Java 6 You could give the launcher what it wants and install the legacy Apple Java SE 6 runtime. Installing Apple Java 6 will allow the launcher to open; however, your Minecraft instances will also run on Java 6, since that is what the game looks for by default unless you override the executable (more on that under Option 2, Step 4 below). The issue with this option is that you have to introduce old technology to make things work. Having everything run on the latest and greatest Java 8 patch would make everything a whole lot cleaner and easier, which brings us to... Option 2 - Just use Java 8, already! 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Because computers store numbers in limited precision. With bigger numbers the precision gets worse and worse, because the numbers are stored something like 1.2345·10123 (but in binary... it's a long story). Here, I try to decrease a big floating point number by different amounts. Notice how changing it by smaller amounts doesn't do anything. >>> a = -360287969785042688.0 >>> a = a-1; format(a, 'f') '-360287969785042688.000000' >>> a = a-5; format(a, 'f') '-360287969785042688.000000' >>> a = a-10; format(a, 'f') '-360287969785042688.000000' >>> a = a-15; format(a, 'f') '-360287969785042688.000000' >>> a = a-20; format(a, 'f') '-360287969785042688.000000' >>> a = a-25; format(a, 'f') '-360287969785042688.000000' >>> a = a-30; format(a, 'f') '-360287969785042688.000000' >>> a = a-35; format(a, 'f') '-360287969785042752.000000' >>> a = a-35; format(a, 'f') '-360287969785042816.000000' >>> a = a-35; format(a, 'f') '-360287969785042880.000000' >>> a = a-35; format(a, 'f') '-360287969785042944.000000' Notice how the difference between numbers isn't actually 35. It is the smallest possible difference between two such huge numbers in binary floating-point representation. The same happens in the game. Multiple times per second it tries to decrease your Y position by vertical speed, which is apparently less than this minimal difference between two neighboring numbers. But if you teleport by a larger amount, you obviously can break that limit. This is clearly outside the scope of this site. But there is plenty of information on floating-point numbers.
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Should I try to manage the estates?
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Of course you should prevent the disaster. It's called "disaster" for a reason. At first, you pay -4 stab - one when disaster starts, 3 when you end it. Additionally, you lose 1 base tax and 1 base production in your capital, and you receive penalties to your military. Finally, ending the disaster is possible only when burgher influence is below 60. So you are forced to reduce their influence anyway. Why not to do it before the disaster fires? Honestly, I'm surprised you're even asking this question. Disasters are bad, aren't they?
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Putting a filled shulker box into another shulker box using a command
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You can do the same you already did for the contents of the inner shulker box, one inside the other. Keep in mind that when a player takes the inner box out of the outer box, he can't put it back in. /give @p minecraft:black_shulker_box 1 0 {BlockEntityTag:{Items:[{id:black_shulker_box,Slot:0,Count:1,tag:{BlockEntityTag:{Items:[...]},display:{Name:"Shadow Guard Sword"}}}]}} Btw, did you test the command in your question? My answer assumes that that one works. Also: Do you really think that's enough swords? Just a little hint: Command blocks can contain up to 32768 characters, maybe you could squeeze in a bit more.
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Detecting items in a Dropper
Game Testing • minecraft java edition minecraft classic • • amarantha

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Count and Slot are both bytes, so need a 'b' after them. You also need to specify the full item name: /testforblock ~ ~-1 ~ dropper 1 {Items:[{Slot:0b,id:minecraft:stone,Count:64b}]}

Trying to detect when a player has a certain helmet on their head

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