A C++ library for simulating Rocket League games at maximum efficiency
RocketSim is a complete simulation of Rocket League's gameplay logic and physics that is completely standalone. RocketSim supports the game modes: Soccar, Hoops, Heatseeker, and Snowday.
RocketSim is designed to run extremely fast, even when complex collisions and suspension calculations are happening every tick. On an average PC running a single thread of RocketSim with two cars, RocketSim can simulate around 10 minutes of game time every second. This means that with 12 threads running RocketSim, you can simulate around 5 days of game time every minute!
RocketSim is not a perfectly accurate replication of Rocket League, but is close enough for most applications. Perceivable differences between the simulation and the real game usually take at least a second to accumulate from an initial state. This means RocketSim is accurate enough to:
- Train machine learning bots
- Simulate different shots on the ball at different angles to find the best input combination
- Simulate air control to find the optimal orientation input
However, RocketSim is NOT accurate enough to:
- Simulate entire games from inputs alone
- Accurately determine the outcome of powerful pinches
- Clone this repo and build it
- Use https://github.com/ZealanL/RLArenaCollisionDumper to dump all of Rocket League's arena collision meshes
- Move those assets into RocketSim's executing directory
Documentation is available at: https://zealanl.github.io/RocketSimDocs/
If you don't want to work in C++, here are some (unofficial) bindings written in other languages:
- Python: https://github.com/mtheall/RocketSim by
mtheall - Python: https://github.com/uservar/pyrocketsim by
uservar - Rust: https://github.com/VirxEC/rocketsim-rs by
VirxEC
Official Python bindings are currently in the works.
RocketSim already heavily outperforms the speed of Rocket League's physics tick step without optimization.
Version performance comparison:
OS: Windows 10 (Process Priority = Normal)
CPU: Intel i5-11400 @ 2.60GHz
Ram Speed: 3200MZ
Compiler: MSVC 14.16
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Arena: Default (Soccar)
Cars: 2 on each team (2v2)
Inputs: Randomly pre-generated, changed every 2-60 ticks for each car
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Single-thread performance (calculated using average CPU cycles per tick on the RocketSim thread) (1M ticks simulated):
v1.0.0 = 30,334tps
v1.1.0 = 48,191tps
v1.2.0 = 50,763tps
RocketSim is not perfectly accurate, but it's close enough that it shouldn't matter (for ML bots or humans). Bots that work well in RocketSim will work well in the actual game and visa-versa.
Feel free to make issues and pull requests if you encounter any issues!
You can also contact me on Discord if you have questions: Zealan#5987
RocketSim was written to replicate Rocket League's game logic, but does not actually contain any code from the game. To Epic Games/Psyonix: If any of you guys have an issue with this, let me know on Discord and we can resolve it.