Lance is a real-time multiplayer game server

It provides an extendible Node.JS based server, on which game logic runs, as well as a client-side library which synchronizes the client's game state with the server game state. In order to provide a smooth visual experience for each connected client, Lance implements efficient networking methods, position interpolation and extrapolation, user input coordination, shadow objects, physics and pseudo-physical movement, automatic handling of network spikes.

Lance aims to optimize the player's visual experience, while providing a simple development model which is highly configurable and easy to analyze and debug.

Features:

• Focus on writing your game. Lance takes care of the netcode
• Can support any type of game or genre
• Optimized networking
  • TCP via websockets
  • Communication is packed and serialized into binary
  • Automatic handling of network spikes with step correction
• Intelligent sync strategies for lag handling
  • Extrapolation (client side prediction) with step re-enactment or:
  • Interpolation for optimal object motion
• Tools for debugging and tracing

More features in the pipeline:

• UDP via WebRTC
• Full-stack testing suite
• Replay saving
• More physics engines

That's so neat! Where do I start?

The official Lance documentation contains articles on theory and rationale, as well as the structure and architecture of the project.

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If you've encountered a bug and it's not already in the issues page, open a new issue.