Dr. Robotnik's Ring Racers is a kart racing video game originally based on the 3D Sonic the Hedgehog fangame Sonic Robo Blast 2, itself based on a modified version of Doom Legacy.
Ring Racers' source code is available to users under the GNU General Public License version 2.0 or higher.
This is a port for the Nintendo Switch.
- Have a switch that can run homebrew
- Download the zip from releases
- Extract to the root of the SD card.
- Start via a game (not album or another applet)
Extract the new zip to the root of the SD card and overwrite any changes. Revisions for only the switch likely only need to update the nro in switch/RingRacers (see the release notes)
- It takes a while to boot up, longer than SRB2/kart do.
- Increase the CPU clock with something like sys-clk. It helps framerates significantly, which is needed to get modes with multiple racers to a playable framerate.
- Legacy GL is not very stable, especially with multiple racers. Consider using software only.
- I would recommend a resolution of 708x400 under software, and 800x450 for less complex tracks or one racer. Legacy GL can handle larger at similar framerates.
- Buttons match the Xbox controller layout. (A and B are swapped, X and Y are swapped)
Dr. Robotnik's Ring Racers is a work of fan art made available for free without intent to profit or harm the intellectual property rights of the original works it is based on. Kart Krew Dev is in no way affiliated with SEGA Corporation. We do not claim ownership of any of SEGA's intellectual property used in Dr. Robotnik's Ring Racers.
Ring Racers is built using a compatible C++ toolchain (GCC, MinGW, Clang and Apple Clang as of this writing), CMake, and Microsoft vcpkg. The compiler and runtime libraries must support the ISO C++17 standard and ISO C11 standard.
On Linux platforms, you will need the following libraries available on the system.
- libcurl
- zlib
- libpng
- libogg
- libvorbis
- libvpx
- libyuv
- SDL2
On Windows and macOS, you will need to install vcpkg instead to build these dependencies alongside the game.
To configure and build the game, there are CMake presets (declared in CMakePresets.json). These presets require the ninja build script tool in addition to cmake and your C++ toolchain. Here is a non-exhaustive list of them:
- ninja-debug: non-optimized, assertions enabled
- ninja-develop: optimized, assertions enabled
- ninja-release: optimized
- ninja-x86_mingw_static_vcpkg-debug
- ninja-x86_mingw_static_vcpkg-develop
- ninja-x86_mingw_static_vcpkg-release
- ninja-x64_osx_vcpkg-debug
- ninja-x64_osx_vcpkg-develop
- ninja-x64_osx_vcpkg-release
- ninja-arm64_osx_vcpkg-debug
- ninja-arm64_osx_vcpkg-develop
- ninja-arm64_osx_vcpkg-release
These presets depend on the VCPKG_ROOT environment variable being specified before the first run of the cmake command. Their build directories are pre-configured as subdirectories of build/.
After all prerequisites are set-up, configure and build using the following commands, adjusting according to your target system:
cmake --preset ninja-x86_mingw_static_vcpkg-develop
cmake --build --preset ninja-x86_mingw_static_vcpkg-develop
With a standard switch development enviroment and the relevant dependencies, run the following to generate the nro.
cmake --preset switch-release
cmake --build --preset switch-release
switch-develop and switch-debug are also available and have nxlink enabled by default. If you want nxlink and no LTO in the release build run this command in between configuring and building.
cmake -U CONFIG_LTO -DSRB2_CONFIG_NXLINK:BOOL=true --preset switch-release
We welcome external contributions from the community. If you are planning on making a large feature you intend to contribute to the project, please consider reaching out to us in the Kart Krew Dev public Discord server so we can coordinate with you.
Our primary source repository is hosted on the SRB2 Gitlab. The Github repository is a mirror of this. If you submit a Pull Request to the Github repository, please keep in mind that we do not consistently monitor that mirror and may not see your request.
All contributions must be made available under the GPL General Public License version 2.0, or public domain. Integrations for third party code must be made to code which is compatibly licensed.