Minecraft – How to make this checkpoint system work in multiplayer? Minecraft 1.9

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I have a checkpoint system in Minecraft 1.9 that detects a when a player is standing on a certain block, and then summons an armorstand where they are. If they step on a different kind of block, it teleports the player back to the armorstand. The problem is that this only works in single player. If there are 2 players, they will both keep setting checkpoints for each other, and it will become chaotic pretty fast. How can I make this work in multiplayer? PS: I have already tried naming armorstands after players, but you can't put selectors in the customname tag. I tried using scoreboards also, but I'm not so clear on how to use them, so I'm not sure if I'm going about it in the right way.

Best Answer

At the beginning, in order:

/scoreboard objectives add id dummy

/scoreboard players set @r[score_id=0] id 1

/scoreboard players set @r[score_id=0] id 2

/scoreboard players set @r[score_id=0] id 3

...

On checkpoint reached:

/execute @p[score_id=1,score_id_min=1] ~ ~ ~ detect ~ ~-1 ~ minecraft:diamond_ore 0 summon ArmorStand ~ ~ ~ {customName:'1'}

/kill @e[type=ArmorStand,name:'1',rm=3]

(repeat for all players, replacing all the 1's except the middle '~-1' with the player's id)

On fail:

/execute @p[score_id=1,score_id_min=1] ~ ~ ~ detect ~ ~-1 ~ minecraft:lit_redstone_ore 0 tp @p @e[type=ArmorStand,name='1'

(repeat for all players, replacing all the 1's except the right middle '~-1' with the player's id)

Related Solutions

Minecraft – Making a horse ride-able by only one player in vanilla Minecraft

The final bit that you need is to just teleport the non-mod player, like so: tp @p ~ ~ ~ (of course, you're probably going to execute that command at the horse). This works because the teleport moves the target, and everything that is riding it, but not the things that the target is riding.

But that's just the bit you were missing, my full solution is below.

First things first, you're going to have to give your mod horses custom names. They can be unique, but it makes it easier if they're all the same. For my example, I'll just use "Mod Horse".

Next, you'll need two scoreboard objectives, isRiding and isMod. I have to admit that I don't really like having to use the isMod objective, but for my solution to work, it's unavoidable.

The final step is to have 4 command blocks triggered by a 20Hz fill clock. In order, those commands are:

scoreboard players add @a isMod 0
scoreboard players set @a isRiding 0
scoreboard players set @a isRiding 1 {Riding:{CustomName:"Mod Horse"}}
tp @a[score_isRiding_min=1,score_isMod=0] ~ ~ ~

The first command ensures that everyone always has a score in the isMod objective, the second and third commands reset the isRiding score, then set the score for anyone riding an entity named "Mod Horse" (this can be abused, by the way), and the fourth command teleports anyone riding a mod horse who isn't a mod to the same spot they were in, effectively knocking them off the horse.

Of course, you're also going to have to set the isMod score for all your mods, but that's easy with /scoreboard players set <mod name> isMod 1.

Minecraft – Test true if NO ArmorStand

This is easily done with a scoreboard objective (or scoreboard tags in 1.9)

First set up the objective:

scoreboard objectives add ASfound dummy

Now, set the score according to whether or not there is an armor stand at x, y, z relative to the player by running these two commands

scoreboard players set @p ASfound 0
execute @e[type=ArmorStand] ~-x ~-y ~-z scoreboard players set @p[r=2] ASfound 1

Now all you have to do is run the tp commands depending on the score:

tp @a[score_ASfound=0] <downward>
tp @a[score_ASfound_min=1]  <forward>

Replace <downward> and <forward> with relative coordinates as needed.

Best Answer

Related Solutions

Minecraft – Making a horse ride-able by only one player in vanilla Minecraft

Minecraft – Test true if NO ArmorStand

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