This code is related to a feature or mechanic in...

September 2, 2025 at 11:07 PM

    @Override
    public boolean canUse() {
        return this.horse.level().hasNearbyAlivePlayer(this.horse.getX(), this.horse.getY(), this.horse.getZ(), 10.0);
    }

    @Override
    public void tick() {
        ServerLevel serverlevel = (ServerLevel)this.horse.level();
        DifficultyInstance difficultyinstance = serverlevel.getCurrentDifficultyAt(this.horse.blockPosition());
        this.horse.setTrap(false);
        this.horse.setTamed(true);
        this.horse.setAge(0);
        LightningBolt lightningbolt = EntityType.LIGHTNING_BOLT.create(serverlevel, EntitySpawnReason.TRIGGERED);
        if (lightningbolt != null) {
            lightningbolt.moveTo(this.horse.getX(), this.horse.getY(), this.horse.getZ());
            lightningbolt.setVisualOnly(true);
            serverlevel.addFreshEntity(lightningbolt);
            Skeleton skeleton = this.createSkeleton(difficultyinstance, this.horse);
            if (skeleton != null) {
                skeleton.startRiding(this.horse);
                serverlevel.addFreshEntityWithPassengers(skeleton);

                for (int i = 0; i < 3; i++) {
                    AbstractHorse abstracthorse = this.createHorse(difficultyinstance);
                    if (abstracthorse != null) {
                        Skeleton skeleton1 = this.createSkeleton(difficultyinstance, abstracthorse);
                        if (skeleton1 != null) {
                            skeleton1.startRiding(abstracthorse);
                            abstracthorse.push(this.horse.getRandom().triangle(0.0, 1.1485), 0.0, this.horse.getRandom().triangle(0.0, 1.1485));
                            serverlevel.addFreshEntityWithPassengers(abstracthorse);
                        }
                    }
                }
            }
        }
    }

    @Nullable
    private AbstractHorse createHorse(DifficultyInstance p_30930_) {
        SkeletonHorse skeletonhorse = EntityType.SKELETON_HORSE.create(this.horse.level(), EntitySpawnReason.TRIGGERED);
        if (skeletonhorse != null) {
            skeletonhorse.finalizeSpawn((ServerLevel)this.horse.level(), p_30930_, EntitySpawnReason.TRIGGERED, null);
            skeletonhorse.setPos(this.horse.getX(), this.horse.getY(), this.horse.getZ());
            skeletonhorse.invulnerableTime = 60;
            skeletonhorse.setPersistenceRequired();
            skeletonhorse.setTamed(true);
            skeletonhorse.setAge(0);
        }

        return skeletonhorse;
    }

This code is related to a feature or mechanic in a Minecraft server or game mod, specifically involving "trap skeleton horses" (a game mechanic in Minecraft). Here's what the code does in detail:

1. `canUse()` Method

This method checks if there is any "alive" player within a 10-block radius of the horse's current position (this.horse). It likely determines whether some specific behavior (like the execution of tick()) is allowed to proceed when a player is nearby.

@Override
public boolean canUse() {
    return this.horse.level().hasNearbyAlivePlayer(this.horse.getX(), this.horse.getY(), this.horse.getZ(), 10.0);
}

this.horse.getX(), this.horse.getY(), and this.horse.getZ() refer to the horse's current position in the game world.
this.horse.level() accesses the game world or level the horse exists in.
hasNearbyAlivePlayer is a method that checks for the presence of any nearby active players within a 10-block radius.

If a player is nearby, it returns true, meaning the action or behavior is permitted.

2. `tick()` Method

This method performs the main behavior triggered once the canUse() method determines there is a nearby player. It simulates a "skeleton horse trap" activation in Minecraft. Here's the breakdown:

a. Setting Up the Initial Horse

It gets the current game level as a ServerLevel.
Fetches the difficulty settings at the horse's location (DifficultyInstance).
Modifies the horse:
- Disables its "trap" state.
- Tames the horse (setTamed(true)).
- Sets its age to 0 (indicating it is now an adult).

b. Creating a Lightning Strike

A LightningBolt entity is spawned at the location of the horse. To do this:
- A lightning bolt entity is created using EntityType.LIGHTNING_BOLT.create.
- The bolt's position is set to the horse's coordinates, and it is marked as "visual only" (setVisualOnly(true)), meaning it won't damage players or entities but will create a visual effect.
- The bolt is added to the world using serverlevel.addFreshEntity(lightningbolt).

c. Spawning a Skeleton Riding the Horse

A skeleton is created using a helper method, createSkeleton(), and placed on the horse (startRiding).
The skeleton (along with the horse it rides) is added to the world with addFreshEntityWithPassengers.

d. Spawning Additional Skeleton-Horse Riders

The code then spawns 3 additional skeleton horses with skeleton riders.
For each iteration:
- A new skeleton horse is created using the createHorse() method.
- A skeleton is added as a rider for the horse (startRiding).
- The spawned horse is slightly pushed in a random direction (push(...)) to spread the skeleton-horses apart and make the spawn more natural-looking.
- Each skeleton-rider pair is added to the world using addFreshEntityWithPassengers.

3. `createHorse` Method

This helper method generates a new skeleton horse and initializes it. Here's what it does:

Creates a SkeletonHorse entity for the current world and spawn reason (e.g., EntitySpawnReason.TRIGGERED).
Initializes and sets its position to match the current horse's position.
Grants the horse:
- Temporary invulnerability (invulnerableTime = 60).
- Persistence (ensures it does not despawn naturally).
- A "tamed" state, meaning it's controllable by a player.
- An age of 0, indicating maturity.

If everything succeeds, it returns the initialized SkeletonHorse. Otherwise, it returns null.

What the Code Does in Summary:

This code implements the mechanic of a "skeleton horse trap" in Minecraft:

It checks if there are any nearby players using canUse().
If a player is nearby, the trap is activated via the tick() method:
- A lightning bolt strikes the location of the horse.
- The horse is converted from a "trap" state and tamed.
- A skeleton rider spawns on the horse.
- Three additional skeleton horses with riders spawn nearby for a total of four skeleton-horse mobs in the area.

This mimics the behavior of skeleton horse traps in Minecraft where, upon activation, a lightning strike occurs and skeleton riders appear on previously harmless-looking skeleton horses.

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