A lightweight C99 library for efficient world replication and entity synchronization in multiplayer games.
librg is a lightweight C library that acts as middleware for multiplayer game development, handling entity tracking, area-of-interest management, and world replication. It solves the bandwidth inefficiency of synchronizing all entities to all players by only replicating visible entities, making it easier to build dedicated game servers and networked games.
Game developers working on multiplayer titles in C or C++ who need efficient entity synchronization without implementing low-level networking logic from scratch.
Developers choose librg for its simplicity, efficiency, and flexibility—it's a single-header, dependency-free solution that integrates with virtually any networking library while drastically reducing bandwidth usage through smart visibility management.
🚀 Making multi-player gamedev simpler since 2017
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Implements area-of-interest management to sync only visible entities, drastically reducing data transmission—illustrated in README comparisons showing fewer connections compared to all-to-all setups.
Works with any UDP/TCP-based networking library like ENet or WebSockets, requiring only buffer handling and integer IDs, as detailed in the networking integration section.
Single-header, pure C99 library with no external dependencies, tested on multiple compilers and platforms including Windows, macOS, and Linux for portability.
Supports 2D/3D worlds, virtual worlds, and advanced entity querying, allowing developers to tailor visibility methods to specific game needs.
Requires external libraries like protobuf or msgpack for data packing, adding integration complexity and potential learning curve, as admitted in the FAQ.
Despite flexibility, users must handle low-level networking setup themselves, which can be error-prone and time-consuming compared to bundled solutions.
Lacks support for common multiplayer needs like lag compensation or authoritative server logic, forcing developers to build these on top.
As a niche C library, it has fewer community resources, examples, and tooling compared to larger engines, relying heavily on provided documentation.