🧱 Build Sandbox

Build Sandbox is a NeoForge mod for Minecraft 1.21.1 that adds a fully isolated creative building dimension where players can design structures safely without affecting their survival world.

✨ Features

🌍 Isolated Sandbox Dimension

A separate flat creative world designed specifically for building and testing structures.
No interaction with your survival world.

🎮 Game Mode Switching

Use the command: /buildsandbox
First execution:
- Saves your survival position, dimension, and inventory
- Teleports you to the sandbox dimension
- Switches you to Creative mode
- Loads your sandbox inventory (if available)
Second execution:
- Saves your sandbox position and inventory
- Restores your survival inventory and position
- Switches you back to Survival mode

🎒 Separate Inventories

Survival inventory is stored independently from sandbox inventory.
Switching worlds restores exactly what you had before entering.

🚫 Sandbox Restrictions

To keep the sandbox clean and controlled:

❌ No natural mob spawning
❌ No portals (Nether/End portals are blocked)
❌ No fire or portal generation allowed
❌ Fully isolated gameplay environment

🧠 Travel Protection

Dimension travel is controlled internally by the mod.
Players cannot freely escape or enter the sandbox without using /buildsandbox.

📦 How It Works

The mod uses a per-player data system:

Stores:
- Survival dimension
- Survival position
- Survival inventory
- Sandbox position
- Sandbox inventory

This ensures that switching between worlds is seamless and persistent.

🧪 Intended Use

Build Sandbox is perfect for:

🏗️ Testing builds safely
🧱 Designing structures without survival risk
🧪 Experimenting with creative ideas
🛠️ Server building practice environments

⚙️ Command

/buildsanbox

Toggles between:

🟢 Survival world
🟣 Sandbox creative world

🛑 Compatibility Notes

Requires NeoForge 1.21.1
Designed for both:
- Singleplayer
- Multiplayer servers

📁 Technical Details

Custom dimension: buildsandbox:sandbox
Flat world generator
Fully custom inventory handling
Event-based restrictions (portals, mobs)
Player state persistence using UUID mapping

🚀 Planned Features (Optional ideas)

No generation of structures in the Build Sandbox dimension
No advancements (achievements) can be obtained inside the Build Sandbox
GUI based selector in addition to the /buildsandbox command
Build export system for saving and exporting creations
Permission system for controlling access to sandbox features (server-side)

👤 Author

Developed by Wilkcraft

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🚀 Build freely, safely, and without affecting your survival world in a fully isolated creative sandbox dimension!