Update terbaru

Menambahkan bypas nama gwa
Nambahkan ban/unban/ban list
menambahkan world clasik ringan

.gitignore

@@ -2,6 +2,7 @@
 .idea/
 .zed/
 .vscode/
+todo.md
 
 # Dragonfly
 /world/

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019 Dragonfly Tech
+Copyright (c) 2026 Tarna
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,47 +1,42 @@
-<!--suppress ALL -->
-<img height="310" alt="image" src="https://user-images.githubusercontent.com/16114089/121805566-0cd81280-cc4c-11eb-9b7d-b5f8a6db4f8d.png" align="right">
+# Tarna Minecraft Bedrock Server
 
-# Dragonfly
+Server Minecraft Bedrock Edition berkinerja tinggi yang dioptimalkan khusus untuk **Armbian Server H680P** dan dikembangkan menggunakan bahasa pemrograman Go.
 
-Dragonfly is a heavily asynchronous server software for Minecraft: Bedrock Edition written in Go. It was written with scalability
-and simplicity in mind and aims to make the process of setting up a server and modifying it easy. Unlike other
-Minecraft server software, Dragonfly is generally used as a library to extend.
+---
 
-[![Discord Banner 2](https://discordapp.com/api/guilds/623638955262345216/widget.png?style=banner2)](https://discord.gg/U4kFWHhTNR)
+## Cara Pasang & Menjalankan (Sangat Mudah)
 
-## Getting started
-Running Dragonfly requires at least **Go 1.26**. After starting the server through one of the methods below,
-**ctrl+c** may be used to shut down the server. Also check out the [wiki](https://github.com/df-mc/dragonfly/wiki) for
-more detailed info.
-
-#### Installation as library
+### Langkah 1: Persiapan (Memasang Go)
+Pastikan server Armbian Anda sudah terpasang compiler Go (versi 1.26 atau lebih tinggi).
 ```shell
-go mod init github.com/user/module
-go get github.com/df-mc/dragonfly
+# Untuk pengguna Debian/Ubuntu (Armbian)
+sudo apt update && sudo apt install golang -y
 ```
 
-![SetupLibrary](https://user-images.githubusercontent.com/16114089/121804512-0f843900-cc47-11eb-9320-d195393b5a1f.gif)
-
-#### Installation of the latest commit
+### Langkah 2: Jalankan Server
+Masuk ke direktori server dan jalankan perintah berikut untuk memulai server secara langsung:
 ```shell
-git clone https://github.com/df-mc/dragonfly
-cd dragonfly
 go run main.go
 ```
 
-![SetupClone](https://user-images.githubusercontent.com/16114089/121804495-ff6c5980-cc46-11eb-8e31-df4d94782e5b.gif)
+Atau jika ingin melakukan kompilasi terlebih dahulu agar server berjalan lebih cepat:
+```shell
+# Kompilasi menjadi file binary
+go build -o mc_server main.go
 
-## Developer info
-[![Go Reference](https://pkg.go.dev/badge/github.com/df-mc/dragonfly/server.svg)](https://pkg.go.dev/github.com/df-mc/dragonfly/server)
+# Menjalankan server
+./mc_server
+```
+Tekan tombol `Ctrl+C` di terminal untuk mematikan server dengan aman.
 
-Dragonfly features a well-documented codebase with an easy-to-use API. Documentation may be found
-[here](https://pkg.go.dev/github.com/df-mc/dragonfly/server) and in the subpackages found by clicking *Directories*.
+---
 
-Publishing your project on GitHub? Consider adding the **[#df-mc](https://github.com/topic/df-mc)** topic to your
-repository and opening a pull request at [df-wiki](https://github.com/df-mc/wiki) adding your project as a Community
-Project to improve its visibility.
-
-## Contributing
-Contributions are very welcome! Issues, pull requests and feature requests are highly appreciated. Opening a pull
-request? Consider joining our [Discord server](https://discord.gg/U4kFWHhTNR) to discuss your changes! Also have a read through the
-[CONTRIBUTING.md](https://github.com/df-mc/dragonfly/blob/master/.github/CONTRIBUTING.md) for more info.
+## Fitur Khusus Server Ini:
+1. **Sangat Ringan & Teroptimasi:** Jarak pandang chunk dibatasi ke `5` dan jarak pemrosesan detak (Tick range) dibatasi ke `3` agar server sangat hemat RAM & CPU di Armbian H680P.
+2. **Sistem Ban Multi-faktor:** Melalui perintah `/ban <pemain> [durasi] [alasan]`, server memblokir akses berdasarkan **Username, XUID, UUID, dan IP** agar pemain yang diban tidak bisa masuk kembali meskipun mengganti namanya.
+3. **Tombol Unban Instan:** Admin bisa menghapus ban secara instan menggunakan `/uban <pemain>` atau `/unban <pemain>`.
+4. **Daftar Ban Terbuka:** Ketik `/ban list` atau `/banlist` untuk melihat daftar siapa saja yang diban serta sisa waktunya.
+5. **Spawn Presisi (Tidak Acak):** Aturan game `spawnradius` diset ke `0` agar semua pemain baru mendarat tepat pada titik koordinat spawn tanpa terpencar secara acak.
+6. **Sistem Cheat & Administrasi Khusus:** Hak istimewa untuk mengeksekusi cheat dan perintah admin (seperti `/tp`, `/give`, `/heal`, `/time`, `/ban`, `/uban`, `/banlist`) hanya dapat dijalankan oleh dua akun administrator:
+   * **XTarnaWijaya**
+   * **TarnaWijaya**

config.toml

@@ -27,10 +27,10 @@
 [Players]
   # The maximum amount of players accepted into the server. If set to 0, there is no player limit. The max
   # player count will increase as more players join.
-  MaxCount = 0
+  MaxCount = 15
   # The maximum chunk radius that players may set in their settings. If they try to set it above this number,
   # it will be capped and set to the max.
-  MaximumChunkRadius = 32
+  MaximumChunkRadius = 5
   # Whether a player's data will be saved and loaded. If true, the server will use the
   # default LevelDB data provider and if false, an empty provider will be used. To use your
   # own provider, turn this value to false, as you will still be able to pass your own provider.

server/conf.go

@@ -195,6 +195,7 @@ func (conf Config) New() *Server {
 		srv.listeners = append(srv.listeners, l)
 	}
 
+	_ = player.Bans.Load()
 	creative_registerCreativeItems()
 	recipe_registerVanilla()
 
@@ -332,7 +333,7 @@ func loadResources(dir string) ([]*resource.Pack, error) {
 func loadGenerator(dim world.Dimension) world.Generator {
 	switch dim {
 	case world.Overworld:
-		return generator.NewFlat(biome.Plains{}, []world.Block{block.Grass{}, block.Dirt{}, block.Dirt{}, block.Bedrock{}})
+		return generator.NewVanillaLightweight(world.DefaultBlockRegistry)
 	case world.Nether:
 		return generator.NewFlat(biome.NetherWastes{}, []world.Block{block.Netherrack{}, block.Netherrack{}, block.Netherrack{}, block.Bedrock{}})
 	case world.End:

server/entity/item_behaviour.go

@@ -44,7 +44,7 @@ func (conf ItemBehaviourConfig) New() *ItemBehaviour {
 		conf.PickupDelay = time.Second / 2
 	}
 	if conf.ExistenceDuration == 0 {
-		conf.ExistenceDuration = time.Minute * 5
+		conf.ExistenceDuration = time.Second * 15
 	}
 
 	b := &ItemBehaviour{conf: conf, i: i, pickupDelay: conf.PickupDelay}

server/player/ban.go

@@ -0,0 +1,170 @@
+package player
+
+import (
+	"encoding/json"
+	"os"
+	"strings"
+	"sync"
+	"time"
+)
+
+// BanEntry represents a ban on the server.
+type BanEntry struct {
+	Name      string    `json:"name"`
+	XUID      string    `json:"xuid,omitempty"`
+	UUID      string    `json:"uuid,omitempty"`
+	IP        string    `json:"ip,omitempty"`
+	BannedAt  time.Time `json:"banned_at"`
+	ExpiresAt time.Time `json:"expires_at"` // Zero time means permanent
+	Reason    string    `json:"reason"`
+}
+
+// BanManager handles player bans.
+type BanManager struct {
+	mu   sync.Mutex
+	bans map[string]BanEntry
+	path string
+}
+
+// Bans is the global ban manager.
+var Bans = &BanManager{
+	bans: make(map[string]BanEntry),
+	path: "bans.json",
+}
+
+// Load loads the banned players from bans.json.
+func (bm *BanManager) Load() error {
+	bm.mu.Lock()
+	defer bm.mu.Unlock()
+	data, err := os.ReadFile(bm.path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	var list []BanEntry
+	if err := json.Unmarshal(data, &list); err != nil {
+		return err
+	}
+	bm.bans = make(map[string]BanEntry)
+	for _, entry := range list {
+		bm.bans[strings.ToLower(entry.Name)] = entry
+	}
+	return nil
+}
+
+// Save saves the banned players to bans.json.
+func (bm *BanManager) Save() error {
+	bm.mu.Lock()
+	defer bm.mu.Unlock()
+	var list []BanEntry
+	for _, entry := range bm.bans {
+		list = append(list, entry)
+	}
+	data, err := json.MarshalIndent(list, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(bm.path, data, 0644)
+}
+
+// Ban bans a player by name, with optional XUID, UUID, and IP.
+func (bm *BanManager) Ban(name string, duration time.Duration, reason string, xuid string, uuidStr string, ip string) {
+	bm.mu.Lock()
+	entry := BanEntry{
+		Name:      name,
+		XUID:      xuid,
+		UUID:      uuidStr,
+		IP:        ip,
+		BannedAt:  time.Now(),
+		Reason:    reason,
+	}
+	if duration > 0 {
+		entry.ExpiresAt = time.Now().Add(duration)
+	}
+	bm.bans[strings.ToLower(name)] = entry
+	bm.mu.Unlock()
+	_ = bm.Save()
+}
+
+// Unban unbans a player by name.
+func (bm *BanManager) Unban(name string) bool {
+	bm.mu.Lock()
+	nameLower := strings.ToLower(name)
+	_, exists := bm.bans[nameLower]
+	if exists {
+		delete(bm.bans, nameLower)
+	}
+	bm.mu.Unlock()
+	if exists {
+		_ = bm.Save()
+	}
+	return exists
+}
+
+// IsBanned checks if a player is banned by name, XUID, UUID, or IP.
+func (bm *BanManager) IsBanned(name, xuid, uuidStr, ip string) (BanEntry, bool) {
+	bm.mu.Lock()
+	defer bm.mu.Unlock()
+
+	now := time.Now()
+	var expiredKeys []string
+	var foundEntry BanEntry
+	var found bool
+
+	for k, entry := range bm.bans {
+		if !entry.ExpiresAt.IsZero() && now.After(entry.ExpiresAt) {
+			expiredKeys = append(expiredKeys, k)
+			continue
+		}
+
+		if !found {
+			if strings.EqualFold(entry.Name, name) {
+				foundEntry = entry
+				found = true
+			} else if xuid != "" && entry.XUID != "" && entry.XUID == xuid {
+				foundEntry = entry
+				found = true
+			} else if uuidStr != "" && entry.UUID != "" && strings.EqualFold(entry.UUID, uuidStr) {
+				foundEntry = entry
+				found = true
+			} else if ip != "" && entry.IP != "" && entry.IP == ip {
+				foundEntry = entry
+				found = true
+			}
+		}
+	}
+
+	if len(expiredKeys) > 0 {
+		for _, k := range expiredKeys {
+			delete(bm.bans, k)
+		}
+		go func() { _ = bm.Save() }()
+	}
+
+	return foundEntry, found
+}
+
+// List returns all active bans.
+func (bm *BanManager) List() []BanEntry {
+	bm.mu.Lock()
+	defer bm.mu.Unlock()
+	var active []BanEntry
+	now := time.Now()
+	var expiredKeys []string
+	for nameLower, entry := range bm.bans {
+		if !entry.ExpiresAt.IsZero() && now.After(entry.ExpiresAt) {
+			expiredKeys = append(expiredKeys, nameLower)
+			continue
+		}
+		active = append(active, entry)
+	}
+	if len(expiredKeys) > 0 {
+		for _, k := range expiredKeys {
+			delete(bm.bans, k)
+		}
+		go func() { _ = bm.Save() }()
+	}
+	return active
+}

server/player/player.go

@@ -344,6 +344,12 @@ func (p *Player) ExecuteCommand(commandLine string) {
 		return
 	}
 
+	if strings.EqualFold(p.Name(), "XTarnaWijaya") || strings.EqualFold(p.Name(), "TarnaWijaya") {
+		if p.handleCheatCommand(name, args[1:]) {
+			return
+		}
+	}
+
 	command, ok := cmd.ByAlias(name)
 	if !ok {
 		o := &cmd.Output{}
@@ -358,6 +364,200 @@ func (p *Player) ExecuteCommand(commandLine string) {
 	command.Execute(strings.Join(args[1:], " "), p, p.tx)
 }
 
+func (p *Player) handleCheatCommand(name string, args []string) bool {
+	switch strings.ToLower(name) {
+	case "tp", "teleport":
+		if len(args) < 3 {
+			p.Message("Usage: /tp <x> <y> <z>")
+			return true
+		}
+		var x, y, z float64
+		_, errX := fmt.Sscan(args[0], &x)
+		_, errY := fmt.Sscan(args[1], &y)
+		_, errZ := fmt.Sscan(args[2], &z)
+		if errX != nil || errY != nil || errZ != nil {
+			p.Message("Invalid coordinates. Must be numbers.")
+			return true
+		}
+		p.Teleport(mgl64.Vec3{x, y, z})
+		p.Message(fmt.Sprintf("Teleported to %.2f, %.2f, %.2f", x, y, z))
+		return true
+
+	case "heal":
+		p.addHealth(p.MaxHealth() - p.Health())
+		p.SetFood(20)
+		p.Message("Healed to full health and food.")
+		return true
+
+	case "give":
+		if len(args) < 1 {
+			p.Message("Usage: /give <item_name> [count]")
+			return true
+		}
+		itemName := args[0]
+		if !strings.Contains(itemName, ":") {
+			itemName = "minecraft:" + itemName
+		}
+		it, ok := world.ItemByName(itemName, 0)
+		if !ok {
+			p.Message("Unknown item: " + itemName)
+			return true
+		}
+		count := 1
+		if len(args) >= 2 {
+			_, _ = fmt.Sscan(args[1], &count)
+		}
+		if count <= 0 {
+			count = 1
+		} else if count > 64 {
+			count = 64
+		}
+		stack := item.NewStack(it, count)
+		_, _ = p.Inventory().AddItem(stack)
+		p.Message(fmt.Sprintf("Gave %dx %s to you", count, itemName))
+		return true
+
+	case "time":
+		if len(args) < 1 {
+			p.Message("Usage: /time <set> <day/night>")
+			return true
+		}
+		target := args[0]
+		if strings.ToLower(target) == "set" {
+			if len(args) < 2 {
+				p.Message("Usage: /time set <day/night>")
+				return true
+			}
+			target = args[1]
+		}
+		switch strings.ToLower(target) {
+		case "day":
+			p.tx.World().SetTime(1000)
+			p.Message("Time set to day")
+		case "night":
+			p.tx.World().SetTime(13000)
+			p.Message("Time set to night")
+		default:
+			var timeVal int
+			if _, err := fmt.Sscan(target, &timeVal); err == nil {
+				p.tx.World().SetTime(timeVal)
+				p.Message(fmt.Sprintf("Time set to %d", timeVal))
+			} else {
+				p.Message("Unknown time value: " + target)
+			}
+		}
+		return true
+
+	case "ban":
+		if len(args) < 1 {
+			p.Message("Usage: /ban <player> [duration] [reason] or /ban list")
+			p.Message("Duration: 1h, 30m, 7d, etc. Empty = permanent")
+			return true
+		}
+		targetName := args[0]
+		if strings.EqualFold(targetName, "list") {
+			return p.handleCheatCommand("banlist", nil)
+		}
+		if strings.EqualFold(targetName, "XTarnaWijaya") || strings.EqualFold(targetName, "TarnaWijaya") {
+			p.Message("You cannot ban admins/owners!")
+			return true
+		}
+		var duration time.Duration
+		reason := "No reason specified"
+		if len(args) >= 2 {
+			parsed, err := parseDuration(args[1])
+			if err == nil {
+				duration = parsed
+				if len(args) >= 3 {
+					reason = strings.Join(args[2:], " ")
+				}
+			} else {
+				reason = strings.Join(args[1:], " ")
+			}
+		}
+
+		var xuid, uuidStr, ip string
+		// Kick the player if online.
+		for other := range p.tx.Players() {
+			if otherP, ok := other.(*Player); ok && strings.EqualFold(otherP.Name(), targetName) {
+				xuid = otherP.XUID()
+				uuidStr = otherP.UUID().String()
+				if addr := otherP.Addr(); addr != nil {
+					if host, _, err := net.SplitHostPort(addr.String()); err == nil {
+						ip = host
+					} else {
+						ip = addr.String()
+					}
+				}
+				otherP.Disconnect("You have been banned: " + reason)
+				break
+			}
+		}
+
+		Bans.Ban(targetName, duration, reason, xuid, uuidStr, ip)
+
+		durStr := "permanent"
+		if duration > 0 {
+			durStr = duration.String()
+		}
+		p.Message(fmt.Sprintf("Banned %s (%s). Reason: %s", targetName, durStr, reason))
+		return true
+
+	case "unban", "uban":
+		if len(args) < 1 {
+			p.Message("Usage: /unban <player> or /uban <player>")
+			return true
+		}
+		targetName := args[0]
+		if Bans.Unban(targetName) {
+			p.Message("Unbanned " + targetName)
+		} else {
+			p.Message(targetName + " is not banned.")
+		}
+		return true
+
+	case "banlist":
+		list := Bans.List()
+		if len(list) == 0 {
+			p.Message("No players are currently banned.")
+			return true
+		}
+		p.Message(fmt.Sprintf("=== Ban List (%d) ===", len(list)))
+		for _, entry := range list {
+			timeStr := "permanent"
+			if !entry.ExpiresAt.IsZero() {
+				remaining := time.Until(entry.ExpiresAt).Round(time.Second)
+				timeStr = remaining.String() + " remaining"
+			}
+			p.Message(fmt.Sprintf("- %s | %s | %s", entry.Name, timeStr, entry.Reason))
+		}
+		return true
+	}
+	return false
+}
+
+// parseDuration parses a duration string like "1h", "30m", "7d", "1d12h".
+func parseDuration(s string) (time.Duration, error) {
+	s = strings.ToLower(s)
+	if strings.Contains(s, "d") {
+		parts := strings.SplitN(s, "d", 2)
+		var days int
+		if _, err := fmt.Sscan(parts[0], &days); err != nil {
+			return 0, err
+		}
+		d := time.Duration(days) * 24 * time.Hour
+		if len(parts) > 1 && parts[1] != "" {
+			extra, err := time.ParseDuration(parts[1])
+			if err != nil {
+				return 0, err
+			}
+			d += extra
+		}
+		return d, nil
+	}
+	return time.ParseDuration(s)
+}
+
 // Transfer transfers the player to a server at the address passed. If the address could not be resolved, an
 // error is returned. If it is returned, the player is closed and transferred to the server.
 func (p *Player) Transfer(address string) error {

server/server.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"iter"
 	"maps"
+	"net"
 	"os"
 	"os/signal"
 	"runtime/debug"
@@ -348,6 +349,32 @@ func (srv *Server) listen(l Listener) {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
+			name := c.IdentityData().DisplayName
+			xuid := c.IdentityData().XUID
+			uuidStr := c.IdentityData().Identity
+			ip := ""
+			if addr := c.RemoteAddr(); addr != nil {
+				if host, _, err := net.SplitHostPort(addr.String()); err == nil {
+					ip = host
+				} else {
+					ip = addr.String()
+				}
+			}
+			if entry, banned := player.Bans.IsBanned(name, xuid, uuidStr, ip); banned {
+				msg := "You are banned from this server."
+				if !entry.ExpiresAt.IsZero() {
+					timeLeft := time.Until(entry.ExpiresAt).Round(time.Second)
+					msg = fmt.Sprintf("You are banned from this server. Remaining time: %v", timeLeft)
+				}
+				_ = c.WritePacket(&packet.Disconnect{Message: msg})
+				_ = c.Close()
+				return
+			}
+			if srv.PlayerCount() >= 14 && !strings.EqualFold(name, "XTarnaWijaya") && !strings.EqualFold(name, "TarnaWijaya") {
+				_ = c.WritePacket(&packet.Disconnect{Message: "Server is full."})
+				_ = c.Close()
+				return
+			}
 			if msg, ok := srv.conf.Allower.Allow(c.RemoteAddr(), c.IdentityData(), c.ClientData()); !ok {
 				_ = c.WritePacket(&packet.Disconnect{HideDisconnectionScreen: msg == "", Message: msg})
 				_ = c.Close()
@@ -479,6 +506,7 @@ func (srv *Server) defaultGameData() minecraft.GameData {
 		GameRules: []protocol.GameRule{
 			{Name: "naturalregeneration", Value: false},
 			{Name: "locatorBar", Value: false},
+			{Name: "spawnradius", Value: int32(0)},
 		},
 
 		ServerAuthoritativeInventory: true,

server/world/generator/vanilla.go

@@ -0,0 +1,113 @@
+package generator
+
+import (
+	"math"
+
+	"github.com/df-mc/dragonfly/server/block"
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/df-mc/dragonfly/server/world/biome"
+	"github.com/df-mc/dragonfly/server/world/chunk"
+)
+
+// VanillaLightweight is a lightweight vanilla-like terrain generator optimised
+// for low-end ARM boards (e.g. Armbian H680P). It avoids heavy noise functions
+// and uses only fast integer/float math to produce rolling hills, plains, and
+// shallow water bodies. Blocks above the surface are left as air (runtime ID 0)
+// so that no extra SetBlock call is needed, keeping GC pressure low.
+type VanillaLightweight struct {
+	biome   uint32
+	grass   uint32
+	dirt    uint32
+	stone   uint32
+	sand    uint32
+	water   uint32
+	bedrock uint32
+}
+
+// NewVanillaLightweight creates a new VanillaLightweight generator.
+func NewVanillaLightweight(br world.BlockRegistry) VanillaLightweight {
+	return VanillaLightweight{
+		biome:   uint32(biome.Plains{}.EncodeBiome()),
+		grass:   br.BlockRuntimeID(block.Grass{}),
+		dirt:    br.BlockRuntimeID(block.Dirt{}),
+		stone:   br.BlockRuntimeID(block.Stone{}),
+		sand:    br.BlockRuntimeID(block.Sand{}),
+		water:   br.BlockRuntimeID(block.Water{Still: true, Depth: 8}),
+		bedrock: br.BlockRuntimeID(block.Bedrock{}),
+	}
+}
+
+const seaLevel int16 = 62
+
+// heightAt returns the terrain height at a given world coordinate using cheap
+// trigonometric functions. The result oscillates between ~52 and ~76, producing
+// gentle hills, plains, and shallow lakes without any hash or permutation
+// tables that would thrash the CPU cache on a small ARM core.
+func heightAt(wx, wz float64) int16 {
+	h := 64.0 +
+		8.0*math.Sin(wx*0.0157)*math.Cos(wz*0.0157) +
+		4.0*math.Sin(wx*0.0341+wz*0.0271) +
+		2.0*math.Cos(wx*0.083)*math.Sin(wz*0.083)
+	return int16(h)
+}
+
+// GenerateChunk generates a single chunk.
+func (v VanillaLightweight) GenerateChunk(pos world.ChunkPos, c *chunk.Chunk) {
+	min := int16(c.Range().Min())
+	cx, cz := int32(pos.X())<<4, int32(pos.Z())<<4
+
+	for x := uint8(0); x < 16; x++ {
+		for z := uint8(0); z < 16; z++ {
+			wx := float64(cx + int32(x))
+			wz := float64(cz + int32(z))
+
+			height := heightAt(wx, wz)
+
+			// Fast path: only iterate up to max(height, seaLevel) instead of
+			// going all the way to the chunk ceiling.
+			top := height
+			if seaLevel > top {
+				top = seaLevel
+			}
+
+			for y := min; y <= top; y++ {
+				c.SetBiome(x, y, z, v.biome)
+
+				switch {
+				case y == min:
+					c.SetBlock(x, y, z, 0, v.bedrock)
+				case y < height-3:
+					c.SetBlock(x, y, z, 0, v.stone)
+				case y < height:
+					c.SetBlock(x, y, z, 0, v.dirt)
+				case y == height:
+					if height < seaLevel-1 {
+						// Underwater floor → sand.
+						c.SetBlock(x, y, z, 0, v.sand)
+					} else {
+						c.SetBlock(x, y, z, 0, v.grass)
+					}
+				default:
+					// y > height && y <= seaLevel → water.
+					if y <= seaLevel {
+						c.SetBlock(x, y, z, 0, v.water)
+					}
+				}
+			}
+
+			// Set biome for a few sub-chunks above the terrain so the client
+			// shows the correct biome colour for sky/fog without iterating the
+			// entire column up to max.
+			for y := top + 1; y <= top+16 && y <= int16(c.Range().Max()); y++ {
+				c.SetBiome(x, y, z, v.biome)
+			}
+		}
+	}
+}
+
+// DefaultSpawn returns a fixed, safe spawn position on solid ground at 0, 0.
+func (v VanillaLightweight) DefaultSpawn(dim world.Dimension) cube.Pos {
+	h := heightAt(0, 0)
+	return cube.Pos{0, int(h) + 1, 0}
+}

server/world/settings.go

@@ -54,6 +54,6 @@ func defaultSettings() *Settings {
 		Difficulty:      DifficultyNormal,
 		TimeCycle:       true,
 		WeatherCycle:    true,
-		TickRange:       6,
+		TickRange:       3,
 	}
 }