Floppy HUD

Fabric version coming soon, follow the project to get notified when a new update drops!

Floppy HUD is a total client-side HUD conversion mod for Minecraft NeoForge 1.21.1. It completely replaces the vanilla Minecraft interface with a nostalgic, fully functional retro UI inspired by the legendary 1993 Doom shareware release.
This mod is a port of the HUD from the official April Fools 2019 Minecraft version ‘3D Shareware v1.34’ with new features.

Features

• The Classic Panel: A custom, fully transparent 256×64 retro hotbar panel that anchors beautifully to the bottom of the screen.
• Live 3D Player Face: A fully animated, 3D rendering of the player’s face right in the center of the HUD. The model features custom rotation math to simulate “looking around” while perfectly freezing the actual entity’s hitboxes in the game world.
• Dynamic Pixel-Perfect Status Bars:
• Hunger: A classic meat shank icon that gradually slices itself away pixel-by-pixel as you starve, using exact bounding-box UV math.
• Oxygen: A custom bubble icon that seamlessly appears and shrinks when diving underwater.
• Clean Text & Translations: Features native Minecraft localization support (fully translatable HEALTH and ARMOR text) and dynamic percentage tracking.
• Seamless Vanilla Integration: Automatically shifts vanilla overlays (like XP levels and item names) to fit the new layout, while safely assassinating conflicting vanilla HUD elements (Armor, Food, Health) using custom Mixins and the NeoForge Event Bus.

Installation

Since this is a client-side only mod, it does not need to be installed on servers.

1. Ensure you have NeoForge 1.21.1 installed.
2. Download the latest .jar file from the Releases tab.
3. Drop the mod into your .minecraft/mods folder.
4. Boot up the game and enjoy the Doom-like HUD!

Under the Hood (For Developers)

This mod was built with a heavy focus on clean, modern rendering practices and optimized code structure:

• GuiGraphics & Z-Layers: Utilizes modern GuiGraphics.blit and matrix stack translations (pose().translate) for flawless Z-layer sorting and Alpha Blending.
• Smart UI Math: Drops the buggy vanilla 1.14 integer-division traps in favor of pure float percentage calculations for UI shrinking effects.
• Safe Overrides: Uses a combination of @Mixin(Gui.class) to outright kill unnecessary vanilla rendering calls before they happen, and RenderGuiLayerEvent.Pre to safely shift necessary vanilla text elements without breaking other mods.

Localization

The mod natively supports Minecraft’s .json language system. It currently has support for en_us; en_gb; pt_pt and pt_br. To add a translation for your language, simply create a new language file (e.g., es_es.json) in the mod’s asset folder with the following keys:

{
  "gui.floppyhud.health": "HEALTH",
  "gui.floppyhud.armor": "ARMOR"
}