open.mp

Structure

Path	Content
`SDK/include`	Core SDK headers (stable between versions)
`SDK/include/Server/Components/*/`	Components/plug-in SDK headers (stable between versions)
`Shared/NetCode/`	Netcode headers (RPC and packet read/write structures, NOT stable between versions)
`Shared/Network/`	Network utility headers (NOT stable between versions)
`lib/`	Various submodules and third-party libraries
`Server/Source/`	Core server implementation (NOT stable between versions, do NOT use headers outside the Source folder)
`Server/Components/*/`	Components/plug-in implementation (NOT stable between versions, do NOT use headers outside the component's folder)

Concepts

Name	Description
Entity	Something that can appear in the 3D world of the game
Pool	Container of something with limited amount of IDs
Component	Something that's conceptually different enough it can be separated into its own module
Extensible	Something to which extensions can be added to preserve ABI compatibility
Extension	Something which adds additional functionality to an extensible and preserves ABI compatibility

Tools

CMake 3.19+
Conan 1.57+ (You can't use conan v2.x, so may need to download directly from github releases or install it using pip3 install conan==1.57.0)

Tools on Windows

Visual Studio 2019+

Visual Studio needs the Desktop development with C++ workload with the C++ Clang tools for Windows component.

Sources

# With HTTPS:
git clone --recursive https://github.com/openmultiplayer/open.mp
# With SSH:
git clone --recursive git@github.com:openmultiplayer/open.mp

Note the use of the --recursive argument, because this repository contains submodules.

Building on Windows

cd open.mp
mkdir build
cd build
cmake .. -A Win32 -T ClangCL
cmake --build . --config RelWithDebInfo

Building on Mac

If you install conan via brew you must ensure you get the correct version; however, the cmake-conan script will not detect it from the default install location. You must therefore also alias it elsewhere:

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

openmultiplayer / open.mp

readme