Rollback Netcode, Featuring Frame-Based Simulation, Input Prediction with Confirmation, Automatic Rollback and Replay, UDP Socket Communication with Reliable Messaging, Real-Time Latency Measurement, Packet Loss Simulation, and Connection Management
- Frame-based simulation: The game state is updated in discrete frames, ensuring determinism.
- Input prediction and confirmation: Local inputs are predicted immediately, while remote inputs are confirmed when they arrive.
- Automatic rollback: When a late input arrives, the game state is rolled back to the correct frame, and the simulation is replayed.
- Frame confirmation: Confirmed frames are used to clean up old data and reduce memory usage.
- UDP Socket Communication: Real network I/O using tokio's
UdpSocket - Packet Structure: Sequence numbers, acknowledgments, and timestamps
- Connection Management: Handshake protocol and heartbeat monitoring
- Ping/Latency Measurement: Real RTT calculation
- Packet Loss Simulation: Optional packet loss for testing
- Reliable Messaging: Basic acknowledgment system
- Disconnect Handling: Proper cleanup when players leave
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Clone the repository:
git clone https://github.com/WillKirkmanM/rollback-netcode cd rollback-netcode -
Run the project:
cargo run -- host
In another terminal:
cargo run -- client 127.0.0.1:8000
This will start two instances of the game, one acting as the host (player 0) and the other as the client (player 1). The client connects to the host via UDP.