path: root/src/Protocol/Protocol_1_11.cpp

// Protocol_1_11.cpp

/*
Implements the 1.11 protocol classes:
	- cProtocol_1_11_0
		- release 1.11 protocol (#315)
	- cProtocol_1_11_1
		- release 1.11.1 protocol (#316)
*/

#include "Globals.h"
#include "Protocol_1_11.h"
#include "Packetizer.h"

#include "../WorldStorage/FastNBT.h"

#include "../Entities/Boat.h"
#include "../Entities/EnderCrystal.h"
#include "../Entities/ExpOrb.h"
#include "../Entities/Minecart.h"
#include "../Entities/FallingBlock.h"
#include "../Entities/Painting.h"
#include "../Entities/Pickup.h"
#include "../Entities/Player.h"
#include "../Entities/ItemFrame.h"
#include "../Entities/ArrowEntity.h"
#include "../Entities/FireworkEntity.h"
#include "../Entities/SplashPotionEntity.h"

#include "../Mobs/IncludeAllMonsters.h"

#include "../BlockEntities/BedEntity.h"
#include "../BlockEntities/MobSpawnerEntity.h"

#include "../Root.h"
#include "../Server.h"
#include "../ClientHandle.h"
#include "../CompositeChat.h"
#include "../JsonUtils.h"
#include "../Bindings/PluginManager.h"





// The disabled error is intended, since the Metadata have overlapping indexes
// based on the type of the Entity.
//
// IMPORTANT: The enum is used to automate the sequential counting of the
// Metadata indexes. Adding a new enum value causes the following values to
// increase their index. Therefore the ordering of the enum values is VERY important!
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wduplicate-enum"
#endif

namespace Metadata_1_11
{
enum MetadataIndex
{
	// Entity
	ENTITY_FLAGS,
	ENTITY_AIR,
	ENTITY_CUSTOM_NAME,
	ENTITY_CUSTOM_NAME_VISIBLE,
	ENTITY_SILENT,
	ENTITY_NO_GRAVITY,
	_ENTITY_NEXT,  // Used by descendants

	// Potion
	POTION_THROWN = _ENTITY_NEXT,

	// FallingBlock
	FALLING_BLOCK_POSITION = _ENTITY_NEXT,

	// AreaEffectCloud
	AREA_EFFECT_CLOUD_RADIUS = _ENTITY_NEXT,
	AREA_EFFECT_CLOUD_COLOR,
	AREA_EFFECT_CLOUD_SINGLE_POINT_EFFECT,
	AREA_EFFECT_CLOUD_PARTICLE_ID,
	AREA_EFFECT_CLOUD_PARTICLE_PARAMETER1,
	AREA_EFFECT_CLOUD_PARTICLE_PARAMETER2,

	// Arrow
	ARROW_CRITICAL = _ENTITY_NEXT,
	_ARROW_NEXT,

	// TippedArrow
	TIPPED_ARROW_COLOR = _ARROW_NEXT,

	// Boat
	BOAT_LAST_HIT_TIME = _ENTITY_NEXT,
	BOAT_FORWARD_DIRECTION,
	BOAT_DAMAGE_TAKEN,
	BOAT_TYPE,
	BOAT_RIGHT_PADDLE_TURNING,
	BOAT_LEFT_PADDLE_TURNING,

	// EnderCrystal
	ENDER_CRYSTAL_BEAM_TARGET = _ENTITY_NEXT,
	ENDER_CRYSTAL_SHOW_BOTTOM,

	// Fireball
	_FIREBALL_NEXT = _ENTITY_NEXT,

	// WitherSkull
	WITHER_SKULL_INVULNERABLE = _FIREBALL_NEXT,

	// Fireworks
	FIREWORK_INFO = _ENTITY_NEXT,
	FIREWORK_BOOSTED_ENTITY_ID,  // 1.11.1 only

	// Hanging
	_HANGING_NEXT = _ENTITY_NEXT,

	// ItemFrame
	ITEM_FRAME_ITEM = _HANGING_NEXT,
	ITEM_FRAME_ROTATION,

	// Item
	ITEM_ITEM = _ENTITY_NEXT,

	// Living
	LIVING_ACTIVE_HAND = _ENTITY_NEXT,
	LIVING_HEALTH,
	LIVING_POTION_EFFECT_COLOR,
	LIVING_POTION_EFFECT_AMBIENT,
	LIVING_NUMBER_OF_ARROWS,
	_LIVING_NEXT,

	// Player
	PLAYER_ADDITIONAL_HEARTHS = _LIVING_NEXT,
	PLAYER_SCORE,
	PLAYER_DISPLAYED_SKIN_PARTS,
	PLAYER_MAIN_HAND,

	// ArmorStand
	ARMOR_STAND_STATUS = _LIVING_NEXT,
	ARMOR_STAND_HEAD_ROTATION,
	ARMOR_STAND_BODY_ROTATION,
	ARMOR_STAND_LEFT_ARM_ROTATION,
	ARMOR_STAND_RIGHT_ARM_ROTATION,
	ARMOR_STAND_LEFT_LEG_ROTATION,
	ARMOR_STAND_RIGHT_LEG_ROTATION,

	// Insentient
	INSENTIENT_STATUS = _LIVING_NEXT,
	_INSENTIENT_NEXT,

	// Ambient
	_AMBIENT_NEXT = _INSENTIENT_NEXT,

	// Bat
	BAT_HANGING = _AMBIENT_NEXT,

	// Creature
	_CREATURE_NEXT = _INSENTIENT_NEXT,

	// Ageable
	AGEABLE_BABY = _CREATURE_NEXT,
	_AGEABLE_NEXT,

	// PolarBear
	POLAR_BEAR_STANDING = _AGEABLE_NEXT,

	// Animal
	_ANIMAL_NEXT = _AGEABLE_NEXT,

	// Abstract horse
	ABSTRACT_HORSE_STATUS = _ANIMAL_NEXT,
	ABSTRACT_HORSE_OWNER,
	_ABSTRACT_HORSE_NEXT,

	// Horse
	HORSE_VARIANT = _ABSTRACT_HORSE_NEXT,
	HORSE_ARMOR,

	// Chested horse
	CHESTED_HORSE_CHESTED = _ABSTRACT_HORSE_NEXT,
	_CHESTED_HORSE_NEXT,

	// Llama
	LLAMA_STRENGTH = _CHESTED_HORSE_NEXT,
	LLAMA_CARPET_COLOR,
	LLAMA_VARIANT,

	// Pig
	PIG_HAS_SADDLE = _ANIMAL_NEXT,
	PIG_TOTAL_CARROT_ON_A_STICK_BOOST,  // 1.11.1 only

	// Rabbit
	RABBIT_TYPE = _ANIMAL_NEXT,

	// Sheep
	SHEEP_STATUS = _ANIMAL_NEXT,

	// TameableAnimal
	TAMEABLE_ANIMAL_STATUS = _ANIMAL_NEXT,
	TAMEABLE_ANIMAL_OWNER,
	_TAMEABLE_NEXT,

	// Ocelot
	OCELOT_TYPE = _TAMEABLE_NEXT,

	// Wolf
	WOLF_DAMAGE_TAKEN = _TAMEABLE_NEXT,
	WOLF_BEGGING,
	WOLF_COLLAR_COLOR,

	// Villager
	VILLAGER_PROFESSION = _AGEABLE_NEXT,

	// Golem
	_GOLEM_NEXT = _CREATURE_NEXT,

	// IronGolem
	IRON_GOLEM_PLAYER_CREATED = _GOLEM_NEXT,

	// Shulker
	SHULKER_FACING_DIRECTION = _GOLEM_NEXT,
	SHULKER_ATTACHMENT_FALLING_BLOCK_POSITION,
	SHULKER_SHIELD_HEIGHT,

	// Monster
	_MONSTER_NEXT = _CREATURE_NEXT,

	// Blaze
	BLAZE_ON_FIRE = _MONSTER_NEXT,

	// Creeper
	CREEPER_STATE = _MONSTER_NEXT,
	CREEPER_POWERED,
	CREEPER_IGNITED,

	// Guardian
	GUARDIAN_STATUS = _MONSTER_NEXT,
	GUARDIAN_TARGET,

	// Abstract Skeleton
	ABSTRACT_SKELETON_ARMS_SWINGING = _MONSTER_NEXT,

	// Spider
	SPIDER_CLIMBING = _MONSTER_NEXT,

	// Witch
	WITCH_AGGRESIVE = _MONSTER_NEXT,

	// Wither
	WITHER_FIRST_HEAD_TARGET = _MONSTER_NEXT,
	WITHER_SECOND_HEAD_TARGET,
	WITHER_THIRD_HEAD_TARGET,
	WITHER_INVULNERABLE_TIMER,

	// Zombie
	ZOMBIE_IS_BABY = _MONSTER_NEXT,
	ZOMBIE_UNUSED,  // Was type
	ZOMBIE_HANDS_RISED_UP,
	_ZOMBIE_NEXT,

	// Zombie villager
	ZOMBIE_VILLAGER_CONVERTING = _ZOMBIE_NEXT,
	ZOMBIE_VILLAGER_PROFESSION,

	// Enderman
	ENDERMAN_CARRIED_BLOCK = _MONSTER_NEXT,
	ENDERMAN_SCREAMING,

	// Evocation illager
	EVOKER_SPELL = _MONSTER_NEXT,

	// Vex
	VEX_FLAGS = _MONSTER_NEXT,

	// Vindication illager
	VINDICATOR_FLAGS = _MONSTER_NEXT,

	// EnderDragon
	ENDER_DRAGON_DRAGON_PHASE = _INSENTIENT_NEXT,

	// Flying
	_FLYING_NEXT = _INSENTIENT_NEXT,

	// Ghast
	GHAST_ATTACKING = _FLYING_NEXT,

	// Slime
	SLIME_SIZE = _INSENTIENT_NEXT,

	// Minecart
	MINECART_SHAKING_POWER = _ENTITY_NEXT,
	MINECART_SHAKING_DIRECTION,
	MINECART_SHAKING_MULTIPLIER,
	MINECART_BLOCK_ID_META,
	MINECART_BLOCK_Y,
	MINECART_SHOW_BLOCK,
	_MINECART_NEXT,

	// MinecartCommandBlock
	MINECART_COMMAND_BLOCK_COMMAND = _MINECART_NEXT,
	MINECART_COMMAND_BLOCK_LAST_OUTPUT,

	// MinecartFurnace
	MINECART_FURNACE_POWERED = _MINECART_NEXT,

	// TNTPrimed
	TNT_PRIMED_FUSE_TIME = _ENTITY_NEXT,
};
}

#ifdef __clang__
#pragma clang diagnostic pop  // Restore ignored clang errors
#endif





////////////////////////////////////////////////////////////////////////////////
// cProtocol_1_11_0:

void cProtocol_1_11_0::SendCollectEntity(const cEntity & a_Collected, const cEntity & a_Collector, unsigned a_Count)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, pktCollectEntity);
	Pkt.WriteVarInt32(a_Collected.GetUniqueID());
	Pkt.WriteVarInt32(a_Collector.GetUniqueID());
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Count));
}





void cProtocol_1_11_0::SendEntityAnimation(const cEntity & a_Entity, const EntityAnimation a_Animation)
{
	switch (a_Animation)
	{
		case EntityAnimation::EggCracks:
		case EntityAnimation::SnowballPoofs:
		{
			// Vanilla stopped doing clientside prediction for thrown projectile particle effects (for some reason).
			// But they're still doing motion prediction, and latency exists, hence re-send the server position to avoid
			// particle effects happening inside a block:
			SendEntityPosition(a_Entity);
			break;
		}
		case EntityAnimation::PawnChestEquipmentBreaks:
		case EntityAnimation::PawnFeetEquipmentBreaks:
		case EntityAnimation::PawnHeadEquipmentBreaks:
		case EntityAnimation::PawnLegsEquipmentBreaks:
		case EntityAnimation::PawnMainHandEquipmentBreaks:
		case EntityAnimation::PawnOffHandEquipmentBreaks:
		{
			const auto Position = a_Entity.GetPosition();

			// 1.11 dropped the automatic particle effect + sound on item break. Emulate at least some of it:
			SendSoundEffect("entity.item.break", Position, 1, 0.75f + ((a_Entity.GetUniqueID() * 23) % 32) / 64.f);
			break;
		}
		default: break;
	}

	Super::SendEntityAnimation(a_Entity, a_Animation);
}





void cProtocol_1_11_0::SendHideTitle(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, pktTitle);
	Pkt.WriteVarInt32(4);  // Hide title
}





void cProtocol_1_11_0::SendResetTitle(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, pktTitle);
	Pkt.WriteVarInt32(5);  // Reset title
}





void cProtocol_1_11_0::SendSpawnMob(const cMonster & a_Mob)
{
	ASSERT(m_State == 3);  // In game mode?

	const auto MobType = GetProtocolMobType(a_Mob.GetMobType());

	// If the type is not valid in this protocol bail out:
	if (MobType == 0)
	{
		return;
	}

	cPacketizer Pkt(*this, pktSpawnMob);
	Pkt.WriteVarInt32(a_Mob.GetUniqueID());
	// TODO: Bad way to write a UUID, and it's not a true UUID, but this is functional for now.
	Pkt.WriteBEUInt64(0);
	Pkt.WriteBEUInt64(a_Mob.GetUniqueID());
	Pkt.WriteVarInt32(MobType);
	Vector3d LastSentPos = a_Mob.GetLastSentPosition();
	Pkt.WriteBEDouble(LastSentPos.x);
	Pkt.WriteBEDouble(LastSentPos.y);
	Pkt.WriteBEDouble(LastSentPos.z);
	Pkt.WriteByteAngle(a_Mob.GetHeadYaw());  // Doesn't seem to be used
	Pkt.WriteByteAngle(a_Mob.GetPitch());
	Pkt.WriteByteAngle(a_Mob.GetYaw());
	Pkt.WriteBEInt16(static_cast<Int16>(a_Mob.GetSpeedX() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Mob.GetSpeedY() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Mob.GetSpeedZ() * 400));
	WriteEntityMetadata(Pkt, a_Mob);
	Pkt.WriteBEUInt8(0xff);  // Metadata terminator
}





void cProtocol_1_11_0::SendTitleTimes(int a_FadeInTicks, int a_DisplayTicks, int a_FadeOutTicks)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, pktTitle);
	Pkt.WriteVarInt32(3);  // Set title display times
	Pkt.WriteBEInt32(a_FadeInTicks);
	Pkt.WriteBEInt32(a_DisplayTicks);
	Pkt.WriteBEInt32(a_FadeOutTicks);
}





void cProtocol_1_11_0::SendUpdateBlockEntity(cBlockEntity & a_BlockEntity)
{
	ASSERT(m_State == 3);  // In game mode?

	Byte Action;
	switch (a_BlockEntity.GetBlockType())
	{
		case E_BLOCK_CHEST:
		case E_BLOCK_ENCHANTMENT_TABLE:
		case E_BLOCK_END_PORTAL:
		case E_BLOCK_TRAPPED_CHEST:
		{
			// The ones with a action of 0 is just a workaround to send the block entities to a client.
			// Todo: 18.09.2020 - remove this when block entities are transmitted in the ChunkData packet - 12xx12
			Action = 0;
			break;
		}

		case E_BLOCK_MOB_SPAWNER:     Action = 1; break;  // Update mob spawner spinny mob thing
		case E_BLOCK_COMMAND_BLOCK:   Action = 2; break;  // Update command block text
		case E_BLOCK_BEACON:          Action = 3; break;  // Update beacon entity
		case E_BLOCK_HEAD:            Action = 4; break;  // Update mobhead entity
		case E_BLOCK_FLOWER_POT:      Action = 5; break;  // Update flower pot
		case E_BLOCK_WALL_BANNER:
		case E_BLOCK_STANDING_BANNER: Action = 6; break;  // Update banner
		case E_BLOCK_BED:             Action = 11; break;  // Update bed color (new!)

		default:                      return;  // Block entities change between versions
	}

	cPacketizer Pkt(*this, pktUpdateBlockEntity);
	Pkt.WriteXYZPosition64(a_BlockEntity.GetPosX(), a_BlockEntity.GetPosY(), a_BlockEntity.GetPosZ());
	Pkt.WriteBEUInt8(Action);

	cFastNBTWriter Writer;
	WriteBlockEntity(Writer, a_BlockEntity);
	Writer.Finish();
	Pkt.WriteBuf(Writer.GetResult());
}





signed char cProtocol_1_11_0::GetProtocolEntityStatus(const EntityAnimation a_Animation) const
{
	switch (a_Animation)
	{
		case EntityAnimation::EggCracks:            return 3;
		case EntityAnimation::EvokerFangsAttacks:   return 4;
		case EntityAnimation::IronGolemStashesGift: return 34;
		case EntityAnimation::PawnTotemActivates:   return 35;
		case EntityAnimation::SnowballPoofs:        return 3;
		default:                                    return Super::GetProtocolEntityStatus(a_Animation);
	}
}





UInt32 cProtocol_1_11_0::GetProtocolMobType(const eMonsterType a_MobType) const
{
	switch (a_MobType)
	{
		// Map invalid type to Giant for easy debugging (if this ever spawns, something has gone very wrong)
		case mtInvalidType:    return 53;
		case mtBat:            return 65;
		case mtBlaze:          return 61;
		case mtCaveSpider:     return 59;
		case mtChicken:        return 93;
		case mtCow:            return 92;
		case mtCreeper:        return 50;
		case mtDonkey:         return 31;
		case mtEnderDragon:    return 63;
		case mtEnderman:       return 58;
		case mtEndermite:      return 67;
		case mtEvoker:         return 34;
		case mtGhast:          return 56;
		case mtGiant:          return 53;
		case mtGuardian:       return 68;
		case mtHorse:          return 100;
		case mtHusk:           return 23;
		case mtIronGolem:      return 99;
		case mtLlama:          return 103;
		case mtMagmaCube:      return 62;
		case mtMooshroom:      return 96;
		case mtMule:           return 32;
		case mtOcelot:         return 98;
		case mtPig:            return 90;
		case mtPolarBear:      return 102;
		case mtRabbit:         return 101;
		case mtSheep:          return 91;
		case mtShulker:        return 69;
		case mtSilverfish:     return 60;
		case mtSkeleton:       return 51;
		case mtSlime:          return 55;
		case mtSnowGolem:      return 97;
		case mtSpider:         return 52;
		case mtStray:          return 6;
		case mtTraderLlama:    return 103;
		case mtSquid:          return 94;
		case mtVex:            return 35;
		case mtVillager:       return 120;
		case mtVindicator:     return 36;
		case mtWitch:          return 66;
		case mtWither:         return 64;
		case mtWitherSkeleton: return 5;
		case mtWolf:           return 95;
		case mtZombie:         return 54;
		case mtZombiePigman:   return 57;
		case mtZombieVillager: return 27;

		default:               return 0;
	}
}





cProtocol::Version cProtocol_1_11_0::GetProtocolVersion() const
{
	return Version::v1_11_0;
}





void cProtocol_1_11_0::HandlePacketBlockPlace(cByteBuffer & a_ByteBuffer)
{
	Vector3i Position;
	if (!a_ByteBuffer.ReadXYZPosition64(Position))
	{
		return;
	}

	HANDLE_READ(a_ByteBuffer, ReadVarInt, Int32, Face);
	HANDLE_READ(a_ByteBuffer, ReadVarInt, Int32, Hand);
	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorX);
	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorY);
	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorZ);

	m_Client->HandleRightClick(
		Position,
		FaceIntToBlockFace(Face),
		{FloorC(CursorX * 16), FloorC(CursorY * 16), FloorC(CursorZ * 16)},
		Hand == 0
	);
}





void cProtocol_1_11_0::WriteBlockEntity(cFastNBTWriter & a_Writer, const cBlockEntity & a_BlockEntity) const
{
	switch (a_BlockEntity.GetBlockType())
	{
		case E_BLOCK_BED:
		{
			auto & BedEntity = static_cast<const cBedEntity &>(a_BlockEntity);
			a_Writer.AddInt("color", BedEntity.GetColor());  // New: multicoloured beds
			break;
		}
		case E_BLOCK_MOB_SPAWNER:
		{
			auto & MobSpawnerEntity = static_cast<const cMobSpawnerEntity &>(a_BlockEntity);
			a_Writer.BeginCompound("SpawnData");
			a_Writer.AddString(
				"id",
				cMonster::MobTypeToVanillaNBT(MobSpawnerEntity.GetEntity())
			);  // New: uses namespaced ID
			a_Writer.EndCompound();
			a_Writer.AddShort("Delay", MobSpawnerEntity.GetSpawnDelay());
			break;
		}
		default: return Super::WriteBlockEntity(a_Writer, a_BlockEntity);
	}

	a_Writer.AddInt("x", a_BlockEntity.GetPosX());
	a_Writer.AddInt("y", a_BlockEntity.GetPosY());
	a_Writer.AddInt("z", a_BlockEntity.GetPosZ());
}





void cProtocol_1_11_0::WriteEntityMetadata(cPacketizer & a_Pkt, const cEntity & a_Entity) const
{
	using namespace Metadata_1_11;

	// Common metadata:
	Int8 Flags = 0;
	if (a_Entity.IsOnFire())
	{
		Flags |= 0x01;
	}
	if (a_Entity.IsCrouched())
	{
		Flags |= 0x02;
	}
	if (a_Entity.IsSprinting())
	{
		Flags |= 0x08;
	}
	if (a_Entity.IsRclking())
	{
		Flags |= 0x10;
	}
	if (a_Entity.IsInvisible())
	{
		Flags |= 0x20;
	}
	a_Pkt.WriteBEUInt8(ENTITY_FLAGS);  // Index
	a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);  // Type
	a_Pkt.WriteBEInt8(Flags);

	switch (a_Entity.GetEntityType())
	{
		case cEntity::etPlayer:
		{
			auto & Player = static_cast<const cPlayer &>(a_Entity);

			// TODO Set player custom name to their name.
			// Then it's possible to move the custom name of mobs to the entities
			// and to remove the "special" player custom name.
			a_Pkt.WriteBEUInt8(ENTITY_CUSTOM_NAME);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_STRING);
			a_Pkt.WriteString(Player.GetName());

			a_Pkt.WriteBEUInt8(LIVING_HEALTH);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(static_cast<float>(Player.GetHealth()));

			a_Pkt.WriteBEUInt8(PLAYER_DISPLAYED_SKIN_PARTS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEUInt8(static_cast<UInt8>(Player.GetSkinParts()));

			a_Pkt.WriteBEUInt8(PLAYER_MAIN_HAND);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEUInt8(Player.IsLeftHanded() ? 0 : 1);
			break;
		}
		case cEntity::etPickup:
		{
			a_Pkt.WriteBEUInt8(ITEM_ITEM);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
			WriteItem(a_Pkt, static_cast<const cPickup &>(a_Entity).GetItem());
			break;
		}
		case cEntity::etMinecart:
		{
			a_Pkt.WriteBEUInt8(MINECART_SHAKING_POWER);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);

			// The following expression makes Minecarts shake more with less health or higher damage taken
			auto & Minecart = static_cast<const cMinecart &>(a_Entity);
			auto maxHealth = a_Entity.GetMaxHealth();
			auto curHealth = a_Entity.GetHealth();
			a_Pkt.WriteVarInt32(static_cast<UInt32>((maxHealth - curHealth) * Minecart.LastDamage() * 4));

			a_Pkt.WriteBEUInt8(MINECART_SHAKING_DIRECTION);  // (doesn't seem to effect anything)
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(1);

			a_Pkt.WriteBEUInt8(MINECART_SHAKING_MULTIPLIER);  // or damage taken
			a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(static_cast<float>(Minecart.LastDamage() + 10));

			if (Minecart.GetPayload() == cMinecart::mpNone)
			{
				auto & RideableMinecart = static_cast<const cRideableMinecart &>(Minecart);
				const cItem & MinecartContent = RideableMinecart.GetContent();
				if (!MinecartContent.IsEmpty())
				{
					a_Pkt.WriteBEUInt8(MINECART_BLOCK_ID_META);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
					int Content = MinecartContent.m_ItemType;
					Content |= MinecartContent.m_ItemDamage << 8;
					a_Pkt.WriteVarInt32(static_cast<UInt32>(Content));

					a_Pkt.WriteBEUInt8(MINECART_BLOCK_Y);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
					a_Pkt.WriteVarInt32(static_cast<UInt32>(RideableMinecart.GetBlockHeight()));

					a_Pkt.WriteBEUInt8(MINECART_SHOW_BLOCK);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
					a_Pkt.WriteBool(true);
				}
			}
			else if (Minecart.GetPayload() == cMinecart::mpFurnace)
			{
				a_Pkt.WriteBEUInt8(MINECART_FURNACE_POWERED);
				a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
				a_Pkt.WriteBool(static_cast<const cMinecartWithFurnace &>(Minecart).IsFueled());
			}
			break;
		}  // case etMinecart

		case cEntity::etProjectile:
		{
			auto & Projectile = static_cast<const cProjectileEntity &>(a_Entity);
			switch (Projectile.GetProjectileKind())
			{
				case cProjectileEntity::pkArrow:
				{
					a_Pkt.WriteBEUInt8(ARROW_CRITICAL);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
					a_Pkt.WriteBEInt8(static_cast<const cArrowEntity &>(Projectile).IsCritical() ? 1 : 0);
					break;
				}
				case cProjectileEntity::pkFirework:
				{
					a_Pkt.WriteBEUInt8(FIREWORK_INFO);  // Firework item used for this firework
					a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
					WriteItem(a_Pkt, static_cast<const cFireworkEntity &>(Projectile).GetItem());

					// FIREWORK_BOOSTED_ENTITY_ID, in 1.11.1 only
					break;
				}
				case cProjectileEntity::pkSplashPotion:
				{
					a_Pkt.WriteBEUInt8(POTION_THROWN);  // Potion item which was thrown
					a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
					WriteItem(a_Pkt, static_cast<const cSplashPotionEntity &>(Projectile).GetItem());
				}
				default:
				{
					break;
				}
			}
			break;
		}  // case etProjectile

		case cEntity::etMonster:
		{
			WriteMobMetadata(a_Pkt, static_cast<const cMonster &>(a_Entity));
			break;
		}

		case cEntity::etBoat:
		{
			auto & Boat = static_cast<const cBoat &>(a_Entity);

			a_Pkt.WriteBEInt8(BOAT_LAST_HIT_TIME);
			a_Pkt.WriteBEInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Boat.GetLastDamage()));

			a_Pkt.WriteBEInt8(BOAT_FORWARD_DIRECTION);
			a_Pkt.WriteBEInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Boat.GetForwardDirection()));

			a_Pkt.WriteBEInt8(BOAT_DAMAGE_TAKEN);
			a_Pkt.WriteBEInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(Boat.GetDamageTaken());

			a_Pkt.WriteBEInt8(BOAT_TYPE);
			a_Pkt.WriteBEInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Boat.GetMaterial()));

			a_Pkt.WriteBEInt8(BOAT_RIGHT_PADDLE_TURNING);
			a_Pkt.WriteBEInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Boat.IsRightPaddleUsed());

			a_Pkt.WriteBEInt8(BOAT_LEFT_PADDLE_TURNING);
			a_Pkt.WriteBEInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Boat.IsLeftPaddleUsed());

			break;
		}  // case etBoat

		case cEntity::etItemFrame:
		{
			auto & Frame = static_cast<const cItemFrame &>(a_Entity);
			a_Pkt.WriteBEUInt8(ITEM_FRAME_ITEM);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
			WriteItem(a_Pkt, Frame.GetItem());
			a_Pkt.WriteBEUInt8(ITEM_FRAME_ROTATION);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(Frame.GetItemRotation());
			break;
		}  // case etItemFrame

		case cEntity::etEnderCrystal:
		{
			const auto & EnderCrystal = static_cast<const cEnderCrystal &>(a_Entity);
			if (EnderCrystal.DisplaysBeam())
			{
				a_Pkt.WriteBEUInt8(ENDER_CRYSTAL_BEAM_TARGET);
				a_Pkt.WriteBEUInt8(METADATA_TYPE_OPTIONAL_POSITION);
				a_Pkt.WriteBool(true);  // Dont do a second check if it should display the beam
				a_Pkt.WriteXYZPosition64(EnderCrystal.GetBeamTarget());
			}
			a_Pkt.WriteBEUInt8(ENDER_CRYSTAL_SHOW_BOTTOM);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(EnderCrystal.ShowsBottom());
			break;
		}  // case etEnderCrystal

		default:
		{
			break;
		}
	}
}





void cProtocol_1_11_0::WriteMobMetadata(cPacketizer & a_Pkt, const cMonster & a_Mob) const
{
	using namespace Metadata_1_11;

	// Living entity Metadata
	if (a_Mob.HasCustomName())
	{
		// TODO: As of 1.9 _all_ entities can have custom names; should this be moved up?
		a_Pkt.WriteBEUInt8(ENTITY_CUSTOM_NAME);
		a_Pkt.WriteBEUInt8(METADATA_TYPE_STRING);
		a_Pkt.WriteString(a_Mob.GetCustomName());

		a_Pkt.WriteBEUInt8(ENTITY_CUSTOM_NAME_VISIBLE);  // Custom name always visible
		a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
		a_Pkt.WriteBool(a_Mob.IsCustomNameAlwaysVisible());
	}

	a_Pkt.WriteBEUInt8(LIVING_HEALTH);
	a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
	a_Pkt.WriteBEFloat(static_cast<float>(a_Mob.GetHealth()));

	switch (a_Mob.GetMobType())
	{
		case mtBat:
		{
			auto & Bat = static_cast<const cBat &>(a_Mob);
			a_Pkt.WriteBEUInt8(BAT_HANGING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(Bat.IsHanging() ? 1 : 0);
			break;
		}  // case mtBat

		case mtChicken:
		{
			auto & Chicken = static_cast<const cChicken &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Chicken.IsBaby());
			break;
		}  // case mtChicken

		case mtCow:
		{
			auto & Cow = static_cast<const cCow &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Cow.IsBaby());
			break;
		}  // case mtCow

		case mtCreeper:
		{
			auto & Creeper = static_cast<const cCreeper &>(a_Mob);
			a_Pkt.WriteBEUInt8(CREEPER_STATE);  // (idle or "blowing")
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(Creeper.IsBlowing() ? 1 : static_cast<UInt32>(-1));

			a_Pkt.WriteBEUInt8(CREEPER_POWERED);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Creeper.IsCharged());

			a_Pkt.WriteBEUInt8(CREEPER_IGNITED);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Creeper.IsBurnedWithFlintAndSteel());
			break;
		}  // case mtCreeper

		case mtEnderman:
		{
			auto & Enderman = static_cast<const cEnderman &>(a_Mob);
			a_Pkt.WriteBEUInt8(ENDERMAN_CARRIED_BLOCK);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BLOCKID);
			UInt32 Carried = 0;
			Carried |= static_cast<UInt32>(Enderman.GetCarriedBlock() << 4);
			Carried |= Enderman.GetCarriedMeta();
			a_Pkt.WriteVarInt32(Carried);

			a_Pkt.WriteBEUInt8(ENDERMAN_SCREAMING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Enderman.IsScreaming());
			break;
		}  // case mtEnderman

		case mtGhast:
		{
			auto & Ghast = static_cast<const cGhast &>(a_Mob);
			a_Pkt.WriteBEUInt8(GHAST_ATTACKING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Ghast.IsCharging());
			break;
		}  // case mtGhast

		case mtHorse:
		{
			// XXX This behaves incorrectly with different variants; horses have different entity IDs now

			// Abstract horse
			auto & Horse = static_cast<const cHorse &>(a_Mob);
			Int8 Flags = 0;
			if (Horse.IsTame())
			{
				Flags |= 0x02;
			}
			if (Horse.IsSaddled())
			{
				Flags |= 0x04;
			}
			if (Horse.IsChested())
			{
				Flags |= 0x08;
			}
			if (Horse.IsEating())
			{
				Flags |= 0x20;
			}
			if (Horse.IsRearing())
			{
				Flags |= 0x40;
			}
			if (Horse.IsMthOpen())
			{
				Flags |= 0x80;
			}
			a_Pkt.WriteBEUInt8(ABSTRACT_HORSE_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(Flags);

			// This doesn't exist any more; it'll cause horses to all be the normal type
			// a_Pkt.WriteBEUInt8(HORSE_TYPE);
			// a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			// a_Pkt.WriteVarInt32(static_cast<UInt32>(Horse.GetHorseType()));

			// Regular horses
			a_Pkt.WriteBEUInt8(HORSE_VARIANT);  // Color / style
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			int Appearance = 0;
			Appearance = Horse.GetHorseColor();
			Appearance |= Horse.GetHorseStyle() << 8;
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Appearance));

			a_Pkt.WriteBEUInt8(HORSE_ARMOR);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Horse.GetHorseArmour()));

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Horse.IsBaby());
			break;
		}  // case mtHorse

		case mtMagmaCube:
		{
			auto & MagmaCube = static_cast<const cMagmaCube &>(a_Mob);
			a_Pkt.WriteBEUInt8(SLIME_SIZE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(MagmaCube.GetSize()));
			break;
		}  // case mtMagmaCube

		case mtOcelot:
		{
			// Todo: move unnecessary to cat
			auto & Ocelot = static_cast<const cOcelot &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Ocelot.IsBaby());

			Int8 OcelotStatus = 0;
			if (Ocelot.IsSitting())
			{
				OcelotStatus |= 0x1;
			}
			if (Ocelot.IsTame())
			{
				OcelotStatus |= 0x4;
			}
			a_Pkt.WriteBEUInt8(TAMEABLE_ANIMAL_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(OcelotStatus);

			a_Pkt.WriteBEUInt8(OCELOT_TYPE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Ocelot.GetOcelotType()));

			break;
		}  // case mtOcelot

		case mtPig:
		{
			auto & Pig = static_cast<const cPig &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Pig.IsBaby());

			a_Pkt.WriteBEUInt8(PIG_HAS_SADDLE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Pig.IsSaddled());

			// PIG_TOTAL_CARROT_ON_A_STICK_BOOST in 1.11.1 only
			break;
		}  // case mtPig

		case mtRabbit:
		{
			auto & Rabbit = static_cast<const cRabbit &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Rabbit.IsBaby());

			a_Pkt.WriteBEUInt8(RABBIT_TYPE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Rabbit.GetRabbitType()));
			break;
		}  // case mtRabbit

		case mtSheep:
		{
			auto & Sheep = static_cast<const cSheep &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Sheep.IsBaby());

			a_Pkt.WriteBEUInt8(SHEEP_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			Int8 SheepMetadata = 0;
			SheepMetadata = static_cast<Int8>(Sheep.GetFurColor());
			if (Sheep.IsSheared())
			{
				SheepMetadata |= 0x10;
			}
			a_Pkt.WriteBEInt8(SheepMetadata);
			break;
		}  // case mtSheep

		case mtSkeleton:
		{
			auto & Skeleton = static_cast<const cSkeleton &>(a_Mob);
			a_Pkt.WriteBEUInt8(LIVING_ACTIVE_HAND);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEUInt8(Skeleton.IsChargingBow() ? 0x01 : 0x00);

			a_Pkt.WriteBEUInt8(ABSTRACT_SKELETON_ARMS_SWINGING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Skeleton.IsChargingBow());
			break;
		}  // case mtSkeleton

		case mtSlime:
		{
			auto & Slime = static_cast<const cSlime &>(a_Mob);
			a_Pkt.WriteBEUInt8(SLIME_SIZE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Slime.GetSize()));
			break;
		}  // case mtSlime

		case mtVillager:
		{
			auto & Villager = static_cast<const cVillager &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Villager.IsBaby());

			a_Pkt.WriteBEUInt8(VILLAGER_PROFESSION);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Villager.GetVilType()));
			break;
		}  // case mtVillager

		case mtWitch:
		{
			auto & Witch = static_cast<const cWitch &>(a_Mob);
			a_Pkt.WriteBEUInt8(WITCH_AGGRESIVE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Witch.IsAngry());
			break;
		}  // case mtWitch

		case mtWither:
		{
			auto & Wither = static_cast<const cWither &>(a_Mob);
			a_Pkt.WriteBEUInt8(WITHER_INVULNERABLE_TIMER);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(Wither.GetWitherInvulnerableTicks());

			// TODO: Use boss bar packet for health
			break;
		}  // case mtWither

		case mtWolf:
		{
			auto & Wolf = static_cast<const cWolf &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Wolf.IsBaby());

			Int8 WolfStatus = 0;
			if (Wolf.IsSitting())
			{
				WolfStatus |= 0x1;
			}
			if (Wolf.IsAngry())
			{
				WolfStatus |= 0x2;
			}
			if (Wolf.IsTame())
			{
				WolfStatus |= 0x4;
			}
			a_Pkt.WriteBEUInt8(TAMEABLE_ANIMAL_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(WolfStatus);

			a_Pkt.WriteBEUInt8(WOLF_DAMAGE_TAKEN);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(static_cast<float>(a_Mob.GetHealth()));  // TODO Not use the current health

			a_Pkt.WriteBEUInt8(WOLF_BEGGING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Wolf.IsBegging());

			a_Pkt.WriteBEUInt8(WOLF_COLLAR_COLOR);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Wolf.GetCollarColor()));
			break;
		}  // case mtWolf

		case mtZombie:
		{
			// XXX Zombies were also split into new subclasses; this doesn't handle that.
			auto & Zombie = static_cast<const cZombie &>(a_Mob);
			a_Pkt.WriteBEUInt8(ZOMBIE_IS_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Zombie.IsBaby());
			break;
		}  // case mtZombie

		case mtZombiePigman:
		{
			auto & ZombiePigman = static_cast<const cZombiePigman &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(ZombiePigman.IsBaby());
			break;
		}  // case mtZombiePigman

		case mtZombieVillager:
		{
			auto & ZombieVillager = reinterpret_cast<const cZombieVillager &>(a_Mob);
			a_Pkt.WriteBEUInt8(ZOMBIE_IS_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(ZombieVillager.IsBaby());

			a_Pkt.WriteBEUInt8(ZOMBIE_VILLAGER_CONVERTING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(ZombieVillager.ConversionTime()));

			a_Pkt.WriteBEUInt8(ZOMBIE_VILLAGER_PROFESSION);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(ZombieVillager.GetProfession()));
			break;
		}  // case mtZombieVillager

		case mtBlaze:
		case mtElderGuardian:
		case mtGuardian:
		case mtSnowGolem:
		{
			// TODO: Mobs with extra fields that aren't implemented
			break;
		}

		case mtCat:

		case mtDonkey:
		case mtMule:

		case mtEvoker:

		case mtLlama:

		case mtPolarBear:

		case mtShulker:

		case mtSkeletonHorse:
		case mtZombieHorse:

		case mtVex:

		case mtVindicator:
		{
			// Todo: Mobs not added yet. Grouped ones have the same metadata
			ASSERT(!"cProtocol_1_11::WriteMobMetadata: received unimplemented type");
			break;
		}

		case mtCaveSpider:
		case mtEnderDragon:
		case mtEndermite:
		case mtGiant:
		case mtIronGolem:
		case mtMooshroom:
		case mtSilverfish:
		case mtStray:
		case mtSpider:
		case mtSquid:
		case mtWitherSkeleton:
		{
			// Mobs without additional metadata
			break;
		}

		default: UNREACHABLE("cProtocol_1_11::WriteMobMetadata: received mob of invalid type");
	}  // switch (a_Mob.GetType())
}





////////////////////////////////////////////////////////////////////////////////
// cProtocol_1_11_1:

cProtocol::Version cProtocol_1_11_1::GetProtocolVersion() const
{
	return Version::v1_11_1;
}