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ARCHITECTURE.md

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Repository architecture

The architecture of this repository is a bit unusual because we are using some tricks to have both the 2D and 3D version of Rapier share the same code-base. Here are the main folders:

  • build/: contains one folder per Rapier crate (for the 2D, 3D, f32, and f64 versions). Each crate has its own Cargo.toml file that adjusts some cargo features, and reference the src folder.
  • src/: contains the actual .rs source code of the Rapier physics engine.
  • src_testbed/: contains the .rs source code of the Rapier testbed (which our examples are based on).
  • examples2d/: simple 2D scenes showcasing some of Rapier's capabilities. Run them with cargo run --release --bin all_examples2.
  • examples3d/: simple 3D scenes showcasing some of Rapier's capabilities. Run them with cargo run --release --bin all_examples3.
  • benchmarks2d/: a set of 2D stress-tests, to see how Rapier performs when it has lots of elements to simulate.
  • benchmarks3d/: a set of 3D stress-tests, to see how Rapier performs when it has lots of elements to simulate. We use the these benchmarks to track the performances of Rapier after some changes, and spot unexpected regressions: https://www.rapier.rs/benchmarks/