Arqade Asked on February 25, 2021
The idea is that a certain number of random people on the server are identified to have a food allergy – let’s pick wheat for an example. Then, when those players eat any item that contains wheat (bread, cake, and cookie in vanilla MC), they will get the poison effect for a certain amount of time.
This seems to be three steps:
/scoreboard teams add wheatAllergy to make a team named wheatAllergy,/scoreboard teams join wheatAllergy @r[limit=X] to specify X random players and place them on team wheatAllergy, andwheatAllergy eat any food that contains wheat and applying a poison effect to them.I assume I would need one command block for each bread, cake, and cookie, but I’m unsure on what those commands would be, exactly. Any ideas?
For bonus points: Same as above, but for contact allergies: i.e., when players on, say, team eggAllergy are hit by a thrown egg, or when players on team dogAllergy touch wolves, tamed or untamed. I feel like contact should be easier than eating, but I’m still unsure of what the command would be.
You can make scoreboard objectives of type minecraft.used:minecraft.<food item name>, for example
/scoreboard objectives add eatBread minecraft.used:minecraft.bread
The only food item this doesn't work for is cake, since cake is not eaten in item form. To detect eating cake, use the objective type minecraft.custom:minecraft.eat_slice_cake instead.
As a minor note, it is not necessary, or even a good idea, to determine whether players are allergic using teams. Players can only be on one team at a time; what if you want a player to be allergic to both wheat and fish? Instead, I recommend that you use tags, like so:
/tag @r[limit=X] add wheatAllergy
Then, to detect that a specific player has eaten a food they are allergic to, you can use
effect give @a[tag=wheatAllergy,scores={eatBread=1..}] minecraft:poison 10
scoreboard players reset @a[scores={eatBread=1..}] eatBread
effect give @a[tag=wheatAllergy,scores={eatCake=1..}] minecraft:poison 10
scoreboard players reset @a[scores={eatCake=1..}] eatCake
effect give @a[tag=wheatAllergy,scores={eatCookie=1..}] minecraft:poison 10
scoreboard players reset @a[scores={eatCookie=1..}] eatCookie
# And so on...
Correct answer by AjaxGb on February 25, 2021
There are statistics for using items (consuming a food item counts as using it) that you can use to create scoreboard objectives.
For example:
/scoreboard objectives add bread stat.useItem.minecraft.bread
will detect when players have eaten bread.
You can then use this for what you want to do:
/effect @a[team=wheatAllergy,score_bread_min=1] minecraft:poison
/scoreboard players reset @a[score_bread_min=1] bread
Alternatively you can also use a combination of advancements and functions, but they're more work to set up. If you're interested in this method just let me know.
Answered by Pepijn on February 25, 2021
You could use scoreboard objectives to track when specific items are eaten. If you type /stat.useItem. and press tab, you will get a list of objective types that track when specific items are used.
To handle contact allergies, you could use the execute command:
/execute @e[type=Wolf] ~ ~ ~ effect @a[team=dogAllergy,r=2] 19 10
However, this would be difficult to use with eggs because they move so quickly.
Answered by ootisg on February 25, 2021
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