TripwireDuper Mod – Description & Activity                                                   

Minecraft Version: Forge 1.21.1 Java Version: Java 21

⚠ CRITICAL BUILD REQUIREMENT

This farm MUST be built facing North–South. Door Must be facing South.

If the structure is built facing East–West, the duplication logic will not validate and the farm will not work. The mod checks directional alignment as part of structural validation.

There is no fallback orientation handling. North–South only.

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Overview

TripwireDuper is a Minecraft Forge mod that introduces a redstone-triggered tripwire hook duplication mechanic. It allows players to build automated farming systems using a precise tripwire-based structure that reliably duplicates items when activated by redstone signals.

Core Functionality Structure & Validation

The mod requires an exact block configuration to operate:

Tripwire Hook – Primary control mechanism

Tripwire Connection – Two blocks forward and one block lower

Directional Requirement: The entire structure must align North–South for validation to succeed.

All components are validated before activation to ensure structural integrity and prevent unintended behavior.

Activity Flow: IDLE → ARMED → TRIGGERED

IDLE – Structure not detected or invalid

ARMED – Structure validated and waiting for redstone input

TRIGGERED – Redstone signal transitions from OFF to ON, executing duplication

Redstone-Based Automation

The mod uses an event-driven system:

Block Placement Events – Validate structures when tripwire hooks are placed

Neighbor Update Events – Detect redstone edge transitions (OFF → ON) to trigger duplication

Safety & Balance Mechanisms

Cooldown System – 5-tick minimum cooldown per structure to prevent spam

Continuous Validation – Duplication only occurs if the structure remains intact

Position Checking – Automatically finds valid air spaces for duplicated items

Edge Detection – Responds only to redstone transitions, not constant power

Directional Enforcement – Rejects structures not aligned North–South

Technical Implementation Key Classes:

DuplicationEngine – Handles duplication logic and positioning

TripwireEventHandler – Manages block placement and redstone events

TripwireStateTracker – Controls state machine and cooldowns

TripwireStructureValidator – Verifies 15+ structural requirements, including orientation

TripwireDupeMod – Main mod initialization and server-level setup

Use Cases

TripwireDuper enables efficient, redstone-controlled item farming systems. Players can create automated production lines where duplication occurs on demand using levers, buttons, or redstone pulses—making it ideal for technical and automation-focused gameplay.