This code is part of a class likely representing a...

August 28, 2025 at 09:15 PM

            if (livingentity != null
                && p_363771_.getDifficulty() == Difficulty.HARD || p_363771_.getDifficulty() == Difficulty.EXTREME
                && (double)this.random.nextFloat() < this.getAttributeValue(Attributes.SPAWN_REINFORCEMENTS_CHANCE)
                && p_363771_.getGameRules().getBoolean(GameRules.RULE_DOMOBSPAWNING)) {
                int i = Mth.floor(this.getX());
                int j = Mth.floor(this.getY());
                int k = Mth.floor(this.getZ());
                EntityType<? extends Zombie> entitytype = this.getType();
                Zombie zombie = entitytype.create(p_363771_, EntitySpawnReason.REINFORCEMENT);
                if (zombie == null) {
                    return true;
                }

                for (int l = 0; l < 50; l++) {
                    int i1 = i + Mth.nextInt(this.random, 7, 40) * Mth.nextInt(this.random, -1, 1);
                    int j1 = j + Mth.nextInt(this.random, 7, 40) * Mth.nextInt(this.random, -1, 1);
                    int k1 = k + Mth.nextInt(this.random, 7, 40) * Mth.nextInt(this.random, -1, 1);
                    BlockPos blockpos = new BlockPos(i1, j1, k1);
                    if (SpawnPlacements.isSpawnPositionOk(entitytype, p_363771_, blockpos)
                        && SpawnPlacements.checkSpawnRules(entitytype, p_363771_, EntitySpawnReason.REINFORCEMENT, blockpos, p_363771_.random)) {
                        zombie.setPos((double)i1, (double)j1, (double)k1);
                        if (!p_363771_.hasNearbyAlivePlayer((double)i1, (double)j1, (double)k1, 7.0)
                            && p_363771_.isUnobstructed(zombie)
                            && p_363771_.noCollision(zombie)
                            && (zombie.canSpawnInLiquids() || !p_363771_.containsAnyLiquid(zombie.getBoundingBox()))) {
                            zombie.setTarget(livingentity);
                            zombie.finalizeSpawn(p_363771_, p_363771_.getCurrentDifficultyAt(zombie.blockPosition()), EntitySpawnReason.REINFORCEMENT, null);
                            p_363771_.addFreshEntityWithPassengers(zombie);
                            AttributeInstance attributeinstance = this.getAttribute(Attributes.SPAWN_REINFORCEMENTS_CHANCE);
                            AttributeModifier attributemodifier = attributeinstance.getModifier(REINFORCEMENT_CALLER_CHARGE_ID);
                            double d0 = attributemodifier != null ? attributemodifier.amount() : 0.0;
                            attributeinstance.removeModifier(REINFORCEMENT_CALLER_CHARGE_ID);
                            attributeinstance.addPermanentModifier(new AttributeModifier(REINFORCEMENT_CALLER_CHARGE_ID, d0 - 0.05, AttributeModifier.Operation.ADD_VALUE));
                            zombie.getAttribute(Attributes.SPAWN_REINFORCEMENTS_CHANCE).addPermanentModifier(ZOMBIE_REINFORCEMENT_CALLEE_CHARGE);
                            break;
                        }
                    }
                }
            }

            return true;
        }
    }

This code is part of a class likely representing a zombie mob in a game, such as Minecraft. Here's an explanation of what this code does:

Context:

The code appears to handle the mechanics for summoning reinforcement zombies under certain conditions. This often happens when a zombie entity calls for help (e.g., in harder game difficulties).

Detailed Description:

Initial Conditions:
- The code checks multiple conditions to determine if reinforcement zombies should spawn:
  - livingentity != null: There is a target entity (e.g., a player) for the zombie.
  - The game's difficulty level is either HARD or EXTREME.
  - A random chance, determined by the zombie's SPAWN_REINFORCEMENTS_CHANCE attribute, is satisfied.
  - The game rule RULE_DOMOBSPAWNING allows mob spawning.
Get Zombie's Position:
- The zombie's current position (x, y, z) is retrieved and rounded to integers using Math utilities (Mth.floor).
Prepare to Spawn Reinforcements:
- The method identifies the type of zombie (EntityType<? extends Zombie>) and creates a new zombie instance (zombie) using the provided world (p_363771_) and spawn reason (EntitySpawnReason.REINFORCEMENT).
- The code stops if zombie is null (i.e., the creation process failed).
Find Valid Spawn Location:
- The zombie attempts to spawn at a random nearby position up to 50 times, subject to these validity checks:
  - SpawnPlacements.isSpawnPositionOk(...): The location can accept such an entity.
  - SpawnPlacements.checkSpawnRules(...): All spawn rules are respected.
  - The spawn position is not near players (hasNearbyAlivePlayer).
  - The spawn location is unobstructed and free from collisions.
  - The zombie can either spawn in water or it spawns in a location free of liquids (containsAnyLiquid).
Spawn Zombie:
- If a valid location is found:
  - The new zombie's position is set.
  - The new zombie targets the player or entity (livingentity) that the original zombie was targeting.
  - The zombie call process is finalized with difficulty and spawn reasons (finalizeSpawn).
  - The new zombie is added to the world (addFreshEntityWithPassengers).
Adjust Reinforcement Chance:
- The SPAWN_REINFORCEMENTS_CHANCE of the original zombie is reduced slightly (-0.05) to make subsequent reinforcement calls less likely.
- The spawned zombie has its reinforcement chance attribute adjusted, likely to manage chain spawns more effectively.
End of Process:
- If the zombie spawns successfully or 50 attempts are exhausted, the method exits, returning true.

Summary:

This code enables a zombie in the game to summon reinforcements (i.e., additional zombies) when the proper conditions are met. It ensures that newly spawned zombies only appear in valid locations and adjusts the reinforcement probabilities to balance the gameplay experience.

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