Server-Authoritative Example

This example demonstrates a server-authoritative model with client-side prediction and server reconciliation.

The example below runs both a “Server” world and a “Client” world. The client sends movement commands to the server, predicts the results locally, and then reconciles its state when the authoritative server response arrives after a simulated latency.

Key Concepts

The example client records movement commands instead of directly modifying state. With Client Prediction, these commands are applied immediately to the local world for zero-latency feedback. When server transactions eventually arrive, Rollback & Reconciliation allows the client to roll back its local history and re-simulate to match the server’s authority. Additionally, Lag Compensation ensures the server handles commands based on the specific tick they were issued by the client.

Controls

Use the W, A, S, and D keys to move. You can also predictively spawn an entity by pressing Space.