Minecraft – How to detect if a player logs out of the game in Minecraft

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I am building a Minecraft survival games map, in which the battle area is on a floating island. My friends discovered that if they are falling to the ground, they can quickly logout and log back in to escape fall damage and not die, thus cheating.

Is there anyway to detect if a player logs out so I can increment their Death score?

I'm building it vanilla, I'm trying to make a whole map automated with just command blocks and redstone, this is the last thing I need to do now.

Best Answer

First, you should set up a scoreboard objective of type stat.leaveGame:

/scoreboard objectives add JustLeft stat.leaveGame

When a player leaves the world, their JustLeft score will increase by 1 because of its type.

On a clock somewhere, you should then have:

/scoreboard players set @a[score_JustLeft_min=1] Death 1

To set the death score of players who have just relogged to 1. Followed by:

/scoreboard players set @a[score_Death_min=1] JustLeft 0

So that their JustLeft score is reset after their Death score is set, preventing them being continually killed.

@a only selects online players, so they should only have their Death score set and then reset when they rejoin the world, even though their JustLeft stat will increase to 1 straight away.

Related Solutions

Minecraft how to detect when a player accesses an anvil

First two questions aren't possible as far as I know. There's not really a good way to detect if a player right clicks in general; whether it's a specific block would be even harder to detect.

The third question is possible though, as there's a stat.craftingTableInteraction scoreboard objective type.

First, create the objective to track people opening a crafting table:

/scoreboard objectives add openedTable stat.craftingTableInteraction

Delete the crafting table:

/setblock X Y Z air

Then wait a tick for the interface to close, and replace the crafting table:

/setblock X Y Z crafting_table

This should work, but keep in mind that if the player is lagging or has a modded client, they may still be able to craft; don't rely on it completely to stop people from crafting.

Minecraft – Detect when player attacks another player

I figured out how to do this. I use the stat.damageDealt scoreboard objective. First I run the following command once:

/scoreboard objectives add hit stat.damageDealt

Then on the 20Hz clock I do the following:

First command block:

/tellraw @a[score_hit_min=1] "Nice Hit!"
Second command block:

/scoreboard players reset @a[score_hit_min=1] hit

How this works is that points is added to the stat.damageDealt objective each time they hit/attack/hurt an entity or player. Then it runs the command on every player that has hurt another entity or player. When that command is done, the objective gets reset.

How I found this is that on the statistics menu from the pause menu, there is a statistic called Damage Dealt.

EDIT:

In Minecraft 1.9, use the repeating command block instead of a 20Hz clock.

Best Answer

Related Solutions

Minecraft how to detect when a player accesses an anvil

Minecraft – Detect when player attacks another player

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