Protocol_1_10.cpp

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// Protocol_1_10.cpp
 
/*
Implements the 1.10 protocol classes:
    - cProtocol_1_10_0
        - release 1.10 protocol (#210), also used by 1.10.1 and 1.10.2
*/
 
#include "Globals.h"
#include "Protocol_1_10.h"
#include "Packetizer.h"
 
#include "json/json.h"
 
#include "../Root.h"
#include "../Server.h"
#include "../ClientHandle.h"
#include "../JsonUtils.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/BannerEntity.h"
#include "../BlockEntities/BeaconEntity.h"
#include "../BlockEntities/CommandBlockEntity.h"
#include "../BlockEntities/MobHeadEntity.h"
#include "../BlockEntities/MobSpawnerEntity.h"
#include "../BlockEntities/FlowerPotEntity.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
{
    enum Metadata_Index
    {
        // 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,
 
        // 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,
 
        // Horse
        HORSE_STATUS = _ANIMAL_NEXT,
        HORSE_TYPE,
        HORSE_VARIANT,
        HORSE_OWNER,
        HORSE_ARMOR,
 
        // Pig
        PIG_HAS_SADDLE = _ANIMAL_NEXT,
 
        // 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,
 
        // Skeleton
        SKELETON_TYPE = _MONSTER_NEXT,
        SKELETON_ARMS_SWINGING,
 
        // 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_TYPE,
        ZOMBIE_CONVERTING,
        ZOMBIE_HANDS_RISED_UP,
 
        // Enderman
        ENDERMAN_CARRIED_BLOCK = _MONSTER_NEXT,
        ENDERMAN_SCREAMING,
 
        // 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_10_0:
 
void cProtocol_1_10_0::SendSoundEffect(const AString & a_SoundName, Vector3d a_Origin, float a_Volume, float a_Pitch)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktSoundEffect);
    Pkt.WriteString(a_SoundName);
    Pkt.WriteVarInt32(0);  // Master sound category (may want to be changed to a parameter later)
    Pkt.WriteBEInt32(FloorC(a_Origin.x * 8.0));
    Pkt.WriteBEInt32(FloorC(a_Origin.y * 8.0));
    Pkt.WriteBEInt32(FloorC(a_Origin.z * 8.0));
    Pkt.WriteBEFloat(a_Volume);
    Pkt.WriteBEFloat(a_Pitch);
}
 
 
 
 
 
UInt32 cProtocol_1_10_0::GetProtocolMobType(const eMonsterType a_MobType) const
{
    switch (a_MobType)
    {
        case mtPolarBear: return 102;
        default:          return Super::GetProtocolMobType(a_MobType);
    }
}
 
 
 
 
 
cProtocol::Version cProtocol_1_10_0::GetProtocolVersion() const
{
    return Version::v1_10_0;
}
 
 
 
 
 
void cProtocol_1_10_0::HandlePacketResourcePackStatus(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, Status);
    m_Client->HandleResourcePack(Status);
}
 
 
 
 
 
void cProtocol_1_10_0::WriteEntityMetadata(cPacketizer & a_Pkt, const cEntity & a_Entity) const
{
    using namespace Metadata;
 
    // 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());
                    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);
            a_Pkt.WriteBEUInt8(ENDER_CRYSTAL_BEAM_TARGET);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_OPTIONAL_POSITION);
            a_Pkt.WriteBool(EnderCrystal.DisplaysBeam());
            if (EnderCrystal.DisplaysBeam())
            {
                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_10_0::WriteMobMetadata(cPacketizer & a_Pkt, const cMonster & a_Mob) const
{
    using namespace Metadata;
 
    // 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:
        {
            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(HORSE_STATUS);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
            a_Pkt.WriteBEInt8(Flags);
 
            a_Pkt.WriteBEUInt8(HORSE_TYPE);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
            a_Pkt.WriteVarInt32(static_cast<UInt32>(Horse.GetHorseType()));
 
            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:
        {
            auto & Ocelot = static_cast<const cOcelot &>(a_Mob);
 
            a_Pkt.WriteBEUInt8(AGEABLE_BABY);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
            a_Pkt.WriteBool(Ocelot.IsBaby());
            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());
 
            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(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 mtWitherSkeleton:
        {
            a_Pkt.WriteBEUInt8(SKELETON_TYPE);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
            a_Pkt.WriteVarInt32(1);  // Is wither skeleton
            break;
        }  // case mtWitherSkeleton
 
        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 mtHusk:
        case mtZombie:
        {
            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());
 
            a_Pkt.WriteBEUInt8(ZOMBIE_TYPE);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
            a_Pkt.WriteVarInt32(0);
 
            a_Pkt.WriteBEUInt8(ZOMBIE_CONVERTING);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
            a_Pkt.WriteBool(false);
            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_TYPE);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
            a_Pkt.WriteVarInt32(ZombieVillager.GetProfession());
 
            a_Pkt.WriteBEUInt8(ZOMBIE_CONVERTING);
            a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
            a_Pkt.WriteBool(ZombieVillager.ConversionTime() != -1);
            break;
        }  // case mtZombieVillager
 
        case mtBlaze:
        case mtElderGuardian:
        case mtGuardian:
        {
            // TODO: Mobs with extra fields that aren't implemented
            break;
        }
        case mtCat:
 
        case mtPolarBear:
 
        case mtShulker:
 
        case mtDonkey:
        case mtMule:
        case mtSkeletonHorse:
        case mtZombieHorse:
        {
            // Todo: Mobs not added yet. Grouped ones have the same metadata
            ASSERT(!"cProtocol_1_10::WriteMobMetadata: received unimplemented type");
            break;
        }
 
        case mtCaveSpider:
        case mtEnderDragon:
        case mtEndermite:
        case mtGiant:
        case mtIronGolem:
        case mtMooshroom:
        case mtSilverfish:
        case mtSnowGolem:
        case mtStray:
        case mtSpider:
        case mtSquid:
        {
            // Entities without additional metadata
            break;
        }
 
        default: UNREACHABLE("cProtocol_1_10::WriteMobMetadata: received mob of invalid type");
    }  // switch (a_Mob.GetType())
}