OSPGL

This repo contains all code for the OSPGL program, despite being called 'new-ospgl', as the original ospgl is now legacy code.

Creating mods

There's an in-depth guide of the different OSPGL subsystems, available at the OSPGL docs repo. This includes how to setup your development environment for lua autocompletion.

Collaborating

The project has a pretty big scope, so collaboration of all kinds is needed, from planning to coding and artistic work. You can check what's needed on the Issues and Projects. Feel free to create new entries with ideas!

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Building

We use CMake for building, so the procedure should be similar on all systems.

OpenSSL is a dependency (for ospm), on most linux distributions it's probably available on the package manager (it will probably come preinstalled), on windows it needs to be manually downloaded (Here's a good binary compilation: https://slproweb.com/download/Win64OpenSSL-1_1_1f.exe)

libdw-dev is required for stacktraces. You can disable this requirement by disabling stacktraces at compile time.

You may also need libx11-dev, xorg-dev and libgl-mesa-dev on linux, but these are usually installed on most systems.

Run these commands to obtain the source:

git clone --recurse-submodules https://github.com/TheOpenSpaceProgram/new-ospgl.git
cd new-ospgl

Linux

cmake .
cmake .
cmake --build . 

Running CMake twice is needed only the first time you build, otherwise assimp will build all importers and make the build time really long You may want to speed up the build using cmake --build . -- -j [Number of CPUs]

Note: If you run cmake in a subdirectory (for example, build), then you may want to copy the compile_commands.json file to the root directory for code completion in VIM and other tools. If your executable is not in the root directory, move it there as the game requires the res folder and the udata folder. You can always change these running ./osp with command line arguments (check OSP.cpp) if you want to keep the executables on a different folder.

Note 2: If you experience strange build errors, try changing the compiler version. g++-11, g++-10 and g++-9 should work fine-

Windows

Open the CMakeLists.txt using Visual Studio. You may need to copy the launch.vs.json to the .vs folder so the debugger launches the executable on the correct working directory.

Set target to OSPGL.exe and build.

You may need to point CMake to the freetype libraries if they are not detected by default, or disable freetype and use stb_freetype, but it has lower text quality.

MacOS

(Not done yet, I guess the linux procedure will work fine, too)

Running

During development, you will need some packages which are "directly" linked to the game code. The final game will only need the core package, but for now you must run these two commands to get the game to properly load:

(ospm must be run in the same folder as the /res folder)

./ospm fetch https://github.com/TheOpenSpaceProgram/new-ospgl/releases/download/ospm-test/debug_system.zip
./ospm fetch https://github.com/TheOpenSpaceProgram/new-ospgl/releases/download/ospm-test/test_parts.zip

If there are weird runtime errors, they may be related to outdated assets. First try to update the packages running the same commands as before and overwriting. If nothing works, ping @Tatjam on the discord and tell him to upload the latest files.

Packaging

ospm is used for managing packages, but as of now it's only capable of downloading packages from an URL using the command fetch.

Code Style

We don't have a very strict coding-style, but these rules must be followed:

• Brackets on the next line
• Single-line blocks, when appropiate, are fine: if(a) { return; }
• Avoid "bracketless" blocks, it's very easy to introduce a hard to find bug with them
• Snake case naming for functions and variables (my_function, current_velocity, parse_json)
  • Feel free to use contractions for common stuff, such as pos for position, nrm for normal...
• Camel case naming for classes and file names (MyClass, JSONFile)
• Use nullptr instead of NULL
• There is no need to mark member variables with anything (m_name, ...), unless it's absolutely neccesary
• Using auto is recommended for long types such as iterators, but should not be abused as some editors may not be able to resolve them, making code confusing.