prefab-custom-addon

Prefab ships with a handful of buildings. After a while you get bored of them.

This addon adds an extension pack system: press Z in-game to browse and download community-made packs, or press X to make your own.

Downloader — browse community packs, pick one, drops into prefab-extension/, ready to use next time you load a world.

Creator — local workspace mode. Fill in a form, pick an NBT, pick a cover image, a few clicks and you have a standard extension pack (with ZIP). Everything lives in prefab-work/ at your game root. Export NBT files using the vanilla Structure Block.

Requires: Prefab 1.0.7+, LDLib2 2.2+. Tested on NeoForge 21.1.233 / MC 1.21.1 / Java 21+.

Keybindings

Folder Layout

The workspace folder mirrors the published pack format:

prefab-work/
├── <pack_id>/
│   ├── information/
│   │   ├── <pack_id>.txt
│   │   └── cover.png
│   └── construction/
│       ├── <building_id>.nbt
│       ├── <building_id>.png
│       └── <building_id>.txt
└── <pack_id>.zip          ← auto-generated

Any change under prefab-work/<id>/ triggers an automatic repack into prefab-work/<id>.zip. To install a pack manually, unzip the file into prefab-extension/<id>/.

Dependencies

NeoForge 21.1.233 on Minecraft 1.21.1.

预制建筑附属 (Prefab Custom Addon)

Prefab 模组的附属扩展，让预制建筑模组可以自定义建筑。自定义建筑的过程完全图形化，只需要准备蓝图即可。

支持版本：1.21.1 (NeoForge) / 1.20.1 (Forge)

主要功能

建筑浏览器

• 浏览本地拓展包中的所有建筑，支持分类、收藏、搜索
• 3D 实时预览，鼠标悬浮可查看方块信息（配合 JEI/EMI 可查询）
• 网站标签页：在线建筑库浏览与一键下载
• 服务器标签页：查看服务器上可建造的建筑，一键建造

服务器建筑上传

• 单人/多人通用：单人游戏可直接建造。多人游戏把本地建筑一键上传到服务器，上传后就能直接建造
• 支持 .nbt / .litematic / .schem 格式，上传时自动转换打包
• 自动检测建筑依赖，依赖缺失时阻止上传并给出提示
• 服务器端防滥用：单文件大小限制、上传冷却、缓存总量上限
• OP 可在管理界面删除建筑、控制玩家的上传权限

依赖检测

• 建筑详情页会自动列出建筑用到的模组方块是否齐全
• 缺失的依赖直接点击即可在游戏内搜索 Modrinth，找到对应模组

缺失方块占位

• 遇到没安装的模组方块，不再凭空消失，而是显示「?」方块
• 一眼看出建筑哪里缺东西，补上依赖后重新加载即可

建筑终端

手持建筑终端右键打开，集成了建筑相关的一切：

• 建筑选择：浏览全部建筑并建造
• 创建建筑：从外部文件（litematic / schem / nbt）导入，或直接在游戏内框选区域创建
• 编辑原理图：逐方块修改建筑，支持撤销
• 分类管理：自定义建筑分类

其他

• 外包建筑蓝图：内置 8 个精美建筑的蓝图，合成后可预览并一键建造
• 自定义推土机：清除区域 1~256 可调，可关闭掉落物
• Jade 兼容：看向建筑时显示名称、尺寸、放置者
• 材料交付：在详情页提交材料，交付进度实时显示

运行环境

安装

放入 mods 文件夹即可。

服务器

多人服务器：用本模组创建的建筑，可以直接上传到服务器里，提交好材料就可以直接放置建筑。服主和管理员可以禁止玩家上传建筑，删除已上传的建筑。

Prefab Custom Addon

An addon for Prefab that lets you add custom buildings to the Prefab mod. The whole process is fully in-game and graphical — all you need is a blueprint.

Available for: 1.21.1 (NeoForge) / 1.20.1 (Forge)

Features

Building Browser

• Browse all buildings from your local extension packs, with categories, favorites and search
• Real-time 3D preview with hover tooltips on blocks (works with JEI/EMI lookup)
• Website tab: browse and download buildings from an online library
• Server tab: see which buildings are buildable on the server and build them directly

Building Upload & Sync

• Singleplayer and multiplayer: build directly in singleplayer. On servers, upload a local building with one click and it's ready to build
• Supports .nbt / .litematic / .schem — automatically converted and packed on upload
• Automatically checks building dependencies; upload is blocked with a clear message if something is missing
• Server-side anti-abuse: per-file size limit, upload cooldown, cache quota
• Admins (OP) can delete buildings and manage per-player upload permissions in a manage screen

Dependency Detection

• The detail page lists every modded block type a building needs, checked against your installed mods
• Missing dependencies are clickable — search Modrinth in-game and find the mod right away

Missing Block Placeholder

• Blocks from mods you don't have installed show up as a "?" block instead of silently vanishing
• Instantly see what's missing and where; install the dependency and reload

Building Terminal

Right-click with the Building Terminal in hand for everything building-related:

• Buildings: browse and build everything
• Create: import from files (litematic / schem / nbt), or select an area in-game
• Schematic Editor: block-by-block editing with undo
• Categories: organize your buildings

More

• Outsource building blueprints: 8 pre-made building blueprints included — craft, preview and build
• Custom Bulldozer: adjustable clearing area from 1 to 256, item drops optional
• Jade compatibility: shows building name, size and placer when looking at one
• Material delivery: submit materials on the detail page and watch the progress

Requirements

Installation

Drop the jar into the mods folder.

Multiplayer

Multiplayer: buildings created with this mod can be uploaded straight to the server — deliver the materials and place the building. Server owners and admins can deny upload permissions for players and delete uploaded buildings.