Open Multiplayer offers a fully backwards compatible mod for SA-MP, enhancing the multiplayer experience. It provides a robust SDK, allowing developers to create and extend functionalities while ensuring compatibility across versions. Ideal for game enthusiasts looking to innovate within a familiar framework.
Open Multiplayer is a multiplayer modification that maintains full backwards compatibility with SA-MP, enhancing the online gaming experience for users. This project provides a structured framework that includes core SDK headers, server implementation details, and various components designed for extensibility and modularity.
Structure of the Repository
The repository is organized into several key directories:
| Path | Content |
|---|---|
SDK/include | Contains core SDK headers that are stable across versions. |
SDK/include/Server/Components/*/ | Houses headers for components and plug-in SDKs, also stable across versions. |
Shared/NetCode/ | Includes netcode headers responsible for RPC and packet structures; this content may vary between versions. |
Shared/Network/ | Contains network utility headers, which might not remain stable. |
lib/ | A collection of various submodules and third-party libraries. |
Server/Source/ | The main implementation of the server, subject to change in future versions. |
Server/Components/*/ | Implementation details for components/plug-ins, not stable across versions. |
Core Concepts
The project is built around several fundamental concepts:
| Name | Description |
|---|---|
| Entity | Represents a 3D object in the game world. |
| Pool | A container that consists of entities with a limited number of IDs. |
| Component | A separable module designed for specific functionalities. |
| Extensible | Allows for extensions that maintain ABI compatibility. |
| Extension | Adds extra features to an extensible component without breaking compatibility. |
Required Tools
To build and work with Open Multiplayer, the following tools are recommended:
- CMake 3.19+
- Conan 1.57+ (Note: version 2.x is incompatible. Download older versions directly from GitHub releases or install via
pip3 install conan==1.57.0).
Windows Development Tools
- Visual Studio 2019+ with the
Desktop development with C++workload andC++ Clang tools for Windowscomponent is required for building on Windows.
Clone the Repository
To clone the Open Multiplayer repository and its submodules, use the following command:
# With HTTPS:
git clone --recursive https://github.com/openmultiplayer/open.mp
# With SSH:
git clone --recursive git@github.com:openmultiplayer/open.mp
Building the Project
Specific build instructions for Windows and Mac are as follows:
On Windows
cd open.mp
mkdir build
cd build
cmake .. -A Win32 -T ClangCL
cmake --build . --config RelWithDebInfo
On Mac
If using Homebrew, install Conan as shown, ensuring the correct version:
brew install conan@1
sudo ln -s /usr/local/opt/conan@1/bin/conan /usr/local/bin/conan
cd open.mp
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make
This robust framework offers an excellent opportunity for developers looking to create engaging and connected gaming experiences, capitalizing on the existing SA-MP community.
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