Bak
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a3fa859804
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78b2a2f022
144
playPackets.go
144
playPackets.go
@ -3,7 +3,11 @@ package main
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import (
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"bufio"
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"bytes"
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"errors"
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"github.com/Tnze/go-mc/nbt"
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"github.com/google/uuid"
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"math/rand/v2"
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"time"
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)
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func (player *Player) sendBundleDelimiter() error {
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@ -356,6 +360,140 @@ func (player *Player) sendPlayStart() error {
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}
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//func (player *Player) sendMapItemData(mapId int32) error {
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// mapEntry := world.m
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//}
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func (player *Player) sendMapItemData(mapId int32) error {
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var buf bytes.Buffer
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mapEntry, found := world.Maps[mapId]
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if found {
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mapEntry.add(&buf)
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}
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return player.sendPacket(0x2C, &buf)
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}
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func (player *Player) sendMerchantOffers(windowID int32, entity *VillagerEntity) error {
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var buf bytes.Buffer
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entity.addOffers(&buf, windowID)
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return player.sendPacket(0x2D, &buf)
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}
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func (player *Player) sendEntityPositionUpdate(entity *Entity, deltas []int16) error {
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if len(deltas) != 3 {
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return errors.New("invalid deltas")
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}
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var buf bytes.Buffer
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addVarint(&buf, entity.ID)
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addInt16(&buf, deltas[0])
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addInt16(&buf, deltas[1])
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addInt16(&buf, deltas[2])
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addBool(&buf, entity.onGround())
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return player.sendPacket(0x2E, &buf)
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}
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func (player *Player) sendEntityPositionRotationUpdate(entity *Entity, deltas []int16) error {
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if len(deltas) != 3 {
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return errors.New("invalid deltas")
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}
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var buf bytes.Buffer
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addVarint(&buf, entity.ID)
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addInt16(&buf, deltas[0])
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addInt16(&buf, deltas[1])
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addInt16(&buf, deltas[2])
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addByte(&buf, entity.Rotation.Yaw)
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addByte(&buf, entity.Rotation.Pitch)
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addBool(&buf, entity.onGround())
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return player.sendPacket(0x2F, &buf)
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}
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func (player *Player) sendEntityRotationUpdate(entity *Entity) error {
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var buf bytes.Buffer
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addVarint(&buf, entity.ID)
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addByte(&buf, entity.Rotation.Yaw)
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addByte(&buf, entity.Rotation.Pitch)
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addBool(&buf, entity.onGround())
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return player.sendPacket(0x30, &buf)
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}
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func (player *Player) sendVehicleMove() error {
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if player.Entity.Vehicle != nil {
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var buf bytes.Buffer
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player.Entity.Vehicle.Position.add(&buf)
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addFloat32(&buf, float32(player.Entity.Vehicle.Rotation.Yaw))
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addFloat32(&buf, float32(player.Entity.Vehicle.Rotation.Pitch))
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return player.sendPacket(0x31, &buf)
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}
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return errors.New("no vehicle")
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}
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func (player *Player) sendBookOpen(isOffHand bool) error {
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var buf bytes.Buffer
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hand := int32(0)
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if isOffHand {
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hand = 1
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}
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addVarint(&buf, hand)
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return player.sendPacket(0x32, &buf)
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}
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func (player *Player) sendOpenScreen(windowID int32, window *Window, title TextComponent) error {
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var buf bytes.Buffer
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addVarint(&buf, windowID)
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addVarint(&buf, window.ID)
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addTextComponent(&buf, title)
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return player.sendPacket(0x33, &buf)
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}
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func (player *Player) sendOpenSignEditor(blockPosition BlockPosition, front bool) error {
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var buf bytes.Buffer
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blockPosition.add(&buf)
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addBool(&buf, front)
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return player.sendPacket(0x34, &buf)
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}
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//0x35 is ping to client
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//0x36 is pong
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func (player *Player) sendGhostRecipe(windowID uint8, recipe string) error {
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var buf bytes.Buffer
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addByte(&buf, windowID)
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addString(&buf, recipe)
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return player.sendPacket(0x37, &buf)
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}
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func (player *Player) sendAbilities() error {
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var buf bytes.Buffer
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addByte(&buf, player.Abilites.export())
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addFloat32(&buf, player.FlyingSpeed)
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addFloat32(&buf, player.FOVModifier)
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return player.sendPacket(0x38, &buf)
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}
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func (player *Player) sendChatMessage(sender *Player, message string) error {
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var buf bytes.Buffer
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//TODO IMPLEMENT
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addUUID(&buf, sender.uuid)
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addVarint(&buf, sender.MessageIndex)
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addBool(&buf, false)
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addString(&buf, message)
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addInt64(&buf, time.Now().Unix())
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addInt64(&buf, rand.Int64())
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//not implementing secure chat
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return player.sendPacket(0x39, &buf)
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}
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func (player *Player) sendDeath(message TextComponent) error {
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var buf bytes.Buffer
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addVarint(&buf, player.Entity.ID)
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addTextComponent(&buf, message)
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return player.sendPacket(0x3C, &buf)
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}
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func (player *Player) sendRemoveFromTab(playersToRemove []uuid.UUID) error {
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if len(playersToRemove) > 0 {
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var buf bytes.Buffer
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addVarint(&buf, int32(len(playersToRemove)))
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for _, playerToRemove := range playersToRemove {
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addUUID(&buf, playerToRemove)
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}
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return player.sendPacket(0x3D, &buf)
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}
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return errors.New("no playersToRemove")
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}
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159
structs.go
159
structs.go
@ -8,6 +8,7 @@ import (
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"github.com/google/uuid"
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"math"
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"net"
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"time"
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)
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type Version struct {
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@ -38,6 +39,29 @@ type ServerStatus struct {
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EnforcesSecureChat bool `json:"enforcesSecureChat"`
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}
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type PlayerAbilites struct {
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Invulnerable bool
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Flying bool
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AllowFlying bool
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CreativeMode bool
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}
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func (abilities *PlayerAbilites) export() (out byte) {
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if abilities.Invulnerable {
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out |= 0x01
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}
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if abilities.Flying {
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out |= 0x02
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}
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if abilities.AllowFlying {
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out |= 0x04
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}
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if abilities.CreativeMode {
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out |= 0x08
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}
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return
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}
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type Player struct {
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conn net.Conn
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@ -59,6 +83,14 @@ type Player struct {
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DeathDimension *Dimension
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DeathPosition BlockPosition
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Abilites PlayerAbilites
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FlyingSpeed float32
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FOVModifier float32
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MessageIndex int32
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CombatStart int64
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CombatEnd int64
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Position EntityPosition
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GameMode uint8
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@ -88,6 +120,21 @@ type Player struct {
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uuid uuid.UUID
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}
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func (player *Player) startCombat() {
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player.CombatStart = time.Now().Unix()
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_ = player.sendPacket(0x3B, &bytes.Buffer{})
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}
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func (player *Player) endCombat() {
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player.CombatEnd = time.Now().Unix()
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length := player.CombatEnd - player.CombatStart
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if length >= 0 && player.CombatEnd != 0 && player.CombatStart != 0 && player.CombatEnd > player.CombatStart {
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var buf bytes.Buffer
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addInt64(&buf, length)
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_ = player.sendPacket(0x3A, &buf)
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}
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}
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type Dimension struct {
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ID int32
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Name string
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@ -370,6 +417,21 @@ func (slot *Slot) add(buf *bytes.Buffer) {
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}
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}
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func (slot *Slot) addTrade(buf *bytes.Buffer) {
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addVarint(buf, slot.Count)
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if slot.Count > 0 {
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addVarint(buf, slot.ItemID)
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addVarint(buf, int32(len(slot.ComponentsToAdd)))
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for componentID, component := range slot.ComponentsToAdd {
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addVarint(buf, componentID)
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component = component //TODO IMPLEMENT ALL THESE STUPID COMPONENTS
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}
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for _, componentID := range slot.ComponentsToRemove {
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addVarint(buf, componentID)
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}
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}
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}
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// PalettedContainer represents a palette-based storage of entries.
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type PalettedContainer struct {
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BitsPerEntry uint8
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@ -621,6 +683,7 @@ func (velocity *Velocity) add(buf *bytes.Buffer) {
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}
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type Entity struct {
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World *World
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ID int32
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UUID uuid.UUID
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Type int32
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@ -631,6 +694,51 @@ type Entity struct {
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Animation uint8
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status int8
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PortalCooldown int32
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Vehicle *Entity
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PlayersInformed []*Player
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}
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// Function to calculate the Euclidean distance between two points in 3D space
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func distance(p1, p2 EntityPosition) float64 {
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dx := p2.X - p1.X
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dy := p2.Y - p1.Y
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dz := p2.Z - p1.Z
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return math.Sqrt(dx*dx + dy*dy + dz*dz)
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}
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func getDeltas(p1, p2 EntityPosition) []int16 {
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return []int16{
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int16((p2.X * 4096) - (p1.X * 4096)),
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int16((p2.Y * 4096) - (p1.Y * 4096)),
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int16((p2.Z * 4096) - (p1.Z * 4096)),
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}
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}
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func (entity *Entity) move(newPos EntityPosition, withRotation bool) {
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diff := distance(entity.Position, newPos)
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if diff <= 7 {
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if withRotation {
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for _, player := range entity.PlayersInformed {
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player.sendEntityPositionRotationUpdate(entity, getDeltas(entity.Position, newPos))
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}
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} else {
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for _, player := range entity.PlayersInformed {
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player.sendEntityPositionUpdate(entity, getDeltas(entity.Position, newPos))
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}
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}
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} else {
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for _, player := range entity.PlayersInformed {
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//TODO make entity teleport
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player = player
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//player.sendEntityTeleport(entity, newPos)
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}
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}
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entity.Position = newPos
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}
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func (entity *Entity) onGround() bool {
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//TODO ADD THIS
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return true
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}
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func (entity *Entity) add(buf *bytes.Buffer) {
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@ -714,3 +822,54 @@ func (Map *Map) add(buf *bytes.Buffer) {
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}
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}
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}
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type VillageTrade struct {
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In1 Slot
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In2 *Slot
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Out Slot
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Disabled bool
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Uses int32
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MaxUses int32
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XP int32
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Modifier int32
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Multiplier float32
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Demand int32
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}
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func (villageTrade *VillageTrade) add(buf *bytes.Buffer) {
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villageTrade.In1.addTrade(buf)
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villageTrade.Out.add(buf)
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villageTrade.In2.addTrade(buf)
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addBool(buf, villageTrade.Disabled)
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addInt32(buf, villageTrade.Uses)
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addInt32(buf, villageTrade.MaxUses)
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addInt32(buf, villageTrade.XP)
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addInt32(buf, villageTrade.Modifier)
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addFloat32(buf, villageTrade.Multiplier)
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addInt32(buf, villageTrade.Demand)
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}
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type VillagerEntity struct {
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Entity *Entity
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Trades []VillageTrade
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Level int32
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XP int32
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Wandering bool
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CanRestock bool
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}
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func (VillagerEntity *VillagerEntity) addOffers(buf *bytes.Buffer, windowID int32) {
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addVarint(buf, windowID)
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addVarint(buf, int32(len(VillagerEntity.Trades)))
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for _, trade := range VillagerEntity.Trades {
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trade.add(buf)
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}
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addVarint(buf, VillagerEntity.Level)
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addVarint(buf, VillagerEntity.XP)
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addBool(buf, !VillagerEntity.Wandering)
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addBool(buf, VillagerEntity.CanRestock)
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}
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type Window struct {
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ID int32
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}
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