Hostile mobs usually despawn once the player moves away from them, typically once they're 128 blocks away. But passive mobs won't despawn, not by default anyway. I want to spawn a cow that will dissapear once unloaded.

 

I thought I could do this by spawning a mob with "PersistenceRequired" set to false, but this doesn't seem to work:

 

			List<ResourceLocation> entities = new ArrayList<ResourceLocation>(EntityList.ENTITY_EGGS.keySet());
			ResourceLocation randomResource = entities.get(rand.nextInt(entities.size()));

			Entity randomEntity = EntityList.createEntityByIDFromName(randomResource, entity.world);
			if (!randomEntity.isNonBoss())
				return;

			NBTTagCompound nbt = new NBTTagCompound();
			nbt.setBoolean("PersistenceRequired", false);
			((EntityLiving) randomEntity).readEntityFromNBT(nbt);

			randomEntity.setPositionAndRotation(entity.posX, entity.posY, entity.posZ, entity.rotationYaw, entity.rotationPitch);
			entity.world.spawnEntity(randomEntity);

			entity.setDead();

 

Edited July 23, 20187 yr by genandnic

1 hour ago, diesieben07 said:

LivingSpawnEvent.AllowDespawn can be used for this purpose.

Thank you, this works perfectly!