MMORPG3D Framework

MMORPG3D Engine
Domain	MMORPG3D.com
Mostly in	JavaScript (Node.js, Express)
Type	Server Authoritative

The MMORPG3D Framework is a browser-based, authoritative multiplayer orchestration engine designed to support massive online environments. Built primarily on a Node.js runtime, it leverages WebSockets for 60Hz real-time state synchronization, handling concurrent client sessions, spatial audio propagation, and procedural world generation directly on the server.

The framework acts as the backend backbone for the playable alpha available at MMORPG3D.com, establishing strict server-side authority to govern structural health, entity artificial intelligence, and physical interactions within the simulated 3D space.

Contents

1 Architecture
2 Audio System
3 Procedural Generation
4 Deployment Infrastructure

Architecture

At its core, the engine utilizes a headless server model. State management is driven by socket.io paired with an express HTTP layer. By retaining game logic strictly server-side, the engine mitigates client manipulation and ensures deterministic outcomes for events like combat, harvesting, and environmental modifications.

Figure 1: Client inputs (white) are validated by the Authoritative Server before broadcasting global state matrices (gold).

All inbound client actions are pushed into event queues, validated against the global state matrix, and broadcasted back out as optimized differential packets, minimizing network payload overhead.

Audio System

A notable feature of the framework is its custom PlayerAudioManager class, which interfaces directly with the browser's native Web Audio API to create highly immersive acoustic environments.

Figure 2: Head-Related Transfer Functions (HRTF) calculate micro-delays between the left and right audio channels based on entity coordinates.

HRTF Panning

Instead of basic stereo panning, the engine employs Head-Related Transfer Functions (HRTF). This calculates the microscopic delays and frequency filtering that occur as sound waves interact with human anatomy, providing true 3-dimensional positional audio based on the exact {x, y, z} coordinates of entities.

TTS Synthesis

NPCs and contextual events are vocalized via real-time Text-to-Speech buffers. The engine modifies these audio buffers on the fly to simulate distinct vocal traits:

Formant shifting: Adjusts playback rate and pitch to create deeper (monster) or higher (small creature) vocal profiles.
Vibrato modulation: Introduces oscillating pitch variance for specific narrative effects.
Echo loops: Applied situationally based on the environmental dimensions (e.g., cavernous biomes).

Procedural Generation

The topological data of the world is not statically stored. Instead, it relies on mathematical procedural generation using the simplex-noise algorithm. This allows the server to generate infinite, deterministic terrain segments on demand.

Figure 3: Procedural terrain is dynamically calculated using a seeded noise algorithm, allowing identical generation without transferring files.

Because the noise generation uses a fixed seeded sequence, clients and servers can mathematically agree on terrain heightmaps without requiring the transfer of massive multi-gigabyte structural maps.

Deployment Infrastructure

The production deployment relies on a dual-layer strategy utilizing NGINX and systemd. NGINX operates as a highly optimized reverse proxy and static file server, intercepting inbound port 80 traffic.

Figure 4: NGINX handles HTTP requests and caching, then establishes an upgraded persistent WebSocket tunnel to Node.js.

server {
    listen 80;
    server_name mmorpg3d.com www.mmorpg3d.com;
    
    location ~* \.(ico|css|js|glb|gltf|bin)$ {
        proxy_pass http://127.0.0.1:3000;
        expires 30d;
        add_header Cache-Control "public, no-transform";
    }
    
    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

Static binary assets (such as `.glb` and `.gltf` 3D models) are heavily cached at the NGINX layer, while active game traffic undergoes the HTTP 1.1 Upgrade protocol to establish persistent bidirectional WebSocket tunnels to the local port 3000 Node.js instance.