FullBelly - Comprehensive Action Hunger System

Introduction

FullBelly is a Minecraft NeoForge mod (1.21.1) that adds a comprehensive action-based hunger consumption system. The mod tracks various player behaviors and automatically deducts corresponding hunger, making survival mode more challenging and realistic.

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Features

• Full Action Coverage: Tracks 26 different types of player behaviors
• Vanilla Compatible: Based on vanilla exhaustion mechanism, fully compatible with native game mechanics
• Debug UI: Real-time HUD display showing food level, exhaustion percentage, and recent actions (debug mode only)
• Action Recording: Visual feedback with emoji icons and combo detection for related actions
• Server-side Processing: All calculations execute on server side, ensuring no client performance impact
• Configurable: Toggle debug mode via in-game commands or configuration file

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Action Types & Consumption Values

Movement (9 types)

Action	Base Cost	Description
🚶 Walking	0.005/tick	Ground movement
🏃 Sprinting	0.05/tick	Sprinting (vanilla standard)
🕵 Sneaking	0.005/tick	Crouching movement
🏊 Swimming	0.0075/tick	Water movement (vanilla standard)
🤿 Underwater Swimming	0.01/tick	Holding breath underwater
🧗 Climbing	0.025/tick	Ladders/vines
🪽 Elytra Flight	0.04/tick	Gliding

Instant Actions (3 types)

Action	Base Cost	Description
⬆ Jumping	0.025/time	Takeoff (vanilla standard)
⚔ Melee Attack	0.005/time	Hit entity
💥 Critical Hit	0.005/time	Falling critical hit

Tool Behaviors (4 types)

Action	Base Cost	Description
⛏ Mining	0.0025/block	Breaking blocks
📦 Placing	0.005/time	Placing blocks
🎣 Fishing Cast	0.005/time	Casting fishing rod
🎣 Fishing Reel	0.005/time	Reeling in

Combat Behaviors (9 types)

Action	Base Cost	Description
💔 Damage Taken	0.005/time	Any damage source
🛡 Block Success	0.005/time	Shield successful block
🛡 Shield Holding	0.005/tick	Continuous shield holding
🏹 Bow Charging	0.005/tick	Bow charging
🏹 Bow Shot	0.005/time	Bow firing
🔫 Crossbow Load	0.005/tick	Crossbow loading
🔫 Crossbow Fire	0.005/time	Crossbow firing
🔱 Trident Charge	0.0075/tick	Trident charging
🔱 Trident Throw	0.015/time	Trident throwing

Other (1 type)

Action	Base Cost	Description
💥 Fall Impact	0.005/time	Landing from height (>3 blocks)

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Usage Guide

Installation

1. Ensure NeoForge 21.1.227+ is installed (Minecraft 1.21.1)
2. Place fullbelly-1.0.3.jar into .minecraft/mods folder
3. Launch the game

Debug Mode

The mod includes a built-in debug mode that displays a real-time HUD overlay with detailed information.

In-game Commands:

/fullbelly debug          - Check current debug mode status
/fullbelly debug true     - Enable debug mode
/fullbelly debug false    - Disable debug mode

Debug HUD Display: When enabled, you'll see an overlay showing:

• 🍗 Food Level: Current hunger points (0-20)
• ⚡ Exhaustion: Current exhaustion as percentage (0-100%)
• Recent Actions: Last 5 actions with emoji icons and exhaustion values
• Total Exhaustion: Cumulative exhaustion since debug mode enabled

Action Combo Detection: Related actions performed in quick succession are grouped together:

• Green background: Most recent action combo
• Red background: Previous action combo
• Actions fade out over time

Configuration File: You can also edit .minecraft/config/fullbelly-common.toml:

debug_mode = true

Note: Debug mode is disabled by default for optimal performance. When disabled, hunger consumption still works normally but no UI is displayed.

Adjust Difficulty

Modify base values in FatigueProcessor.java:

• Lower values = Easy mode
• Higher values = Hard mode

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Technical Implementation

Core Components

• ActionType: Enum defining 24 action types
• FatigueProcessor: Core processor, applies exhaustion to FoodData
• MovementHandler: Detects player movement using position tracking
• ExhaustionHandler: Captures block break/place events
• PlayerMixin: Detects various behaviors through Mixin injection

How It Works

1. Detect player behaviors through Mixin and event system
2. Call FatigueProcessor.dispatch() to process consumption
3. Apply consumption using vanilla FoodData.addExhaustion() method
4. When exhaustion accumulates to 4.0, automatically deducts 1 food point

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Compatibility

• ✅ NeoForge 21.1.229
• ✅ Minecraft 1.21.1
• ✅ Runs on both server/client
• ✅ No conflicts with other mods

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License

This project is open-sourced under the MIT License.

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Version: 1.0.3
Minecraft: 1.21.1
NeoForge: 21.1.227+
Last Updated: 2026-05-13

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Changelog

v1.0.3 (2026-05-13)

• ✨ Reduced all base consumption values by 50% for better balance
• ✨ Changed all emoji icons to single-character variants for better rendering
• ✨ Added real-time HUD overlay for debug mode (replaces chat messages)
• ✨ Implemented action combo detection with visual grouping
• ✨ Added exhaustion percentage display (0-100%)
• ✨ Optimized debug mode: no action recording when disabled (prevents memory leak)
• 🐛 Fixed mining detection to include all block types (not just tool-mineable)
• 🐛 Fixed combo background transparency fading with text

v1.0.2 (Previous)

• Initial release with comprehensive action tracking
• 24 action types supported
• Server-side exhaustion processing
• Debug mode with chat output

See CHANGELOG.md for detailed version history.