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# Create Optimized Trains Performance optimization addon for **Create Mod** trains (Forge 1.20.1). ## Features ### 1. LOD (Level of Detail) for Trains - **FULL** — Real carriages with full physics (player nearby) - **MEDIUM** — Simplified physics, normal rendering - **LOW** — No physics, no collisions, minimal contraption updates - **GHOST** — Ghost entity, no rendering, abstract data only ### 2. Carriage Grouping / Abstraction - Merges multiple carriages into a single logical entity (`TrainGroup`) - Stores only: length, speed, position, carriage list as NBT - Expands back when the player approaches ### 3. Safe Multi-threading **Secondary thread (safe):** - Route calculation - Collision prediction - Schedule optimization - Priority management - LOD decisions - Predictive simulation **Main thread (required):** - Actual entity movement - Create physics - Rendering - Block interaction ### 4. Tick Throttling (Partial Updates) - FULL: every tick - MEDIUM: every 3 ticks (configurable) - LOW: every 8 ticks - GHOST: every 20 ticks ### 5. Render Optimization - Disables animations for distant trains - Skips full rendering for GHOST LOD - Reduces particles and visual effects - Hides internal details when not visible ### 6. Proxy Entities - Lightweight entity representing the entire train - Replaces dozens of contraptions - Keeps position, speed and direction - Recreates real carriages when needed ### 7. Smart Chunk Loading Management - Loads only essential chunks - Unloads chunks behind the train earlier - Pre-loads chunks ahead - Anti-thrashing (prevents repeated load/unload cycles) ### 8. Physics Optimization - Simplified physics for distant carriages - Disables collisions between carriages at low LOD - Reduces bogie checks - Disables internal contraption physics when far away ### 9. Networking Optimization - Sends updates only when speed/direction changes - Batches packets (delta compression) - Reduces sync frequency for distant trains ### 10. Priority System - Priority by type (EXPRESS > PASSENGER > FREIGHT > LOW) - Conflict resolution at junctions - Track segment reservation - Async conflict analysis ### 11. Dynamic Performance Monitor - **NORMAL** (TPS >= 18): full fidelity - **DEGRADED** (15 <= TPS < 18): light optimizations - **CRITICAL** (TPS < 15): aggressive optimizations, reduced LOD distances ## Configuration File: `create_optimized_trains-common.toml` All features are individually configurable with distances, intervals and toggles. ## Dependencies - Minecraft 1.20.1 - Forge 47.1.33+ - Create Mod 6.0.8+ - Flywheel 1.0.6+ (bundled with Create)