Chijin

Minimal Rust bindings for OpenCASCADE (OCC 7.9).

Provides safe, ergonomic wrappers around the OCC C++ kernel for:

• Reading/writing STEP and BRep formats (stream-based, no temp files)
• Constructing primitive shapes (box, cylinder, half-space)
• Boolean operations (union, subtract, intersect)
• Face/edge topology traversal
• Meshing with customizable tolerance

Usage

Add this to your Cargo.toml:

[dependencies]
chijin = "0.1.0"

Features

• bundled (default): Download and build OCCT 7.9.3 from source during cargo build. The built library is installed into target/occt/ inside the crate directory.

• prebuilt: Use a pre-built OCCT pointed to by the OCCT_ROOT environment variable. OCCT_ROOT can be any directory that contains OCCT headers and static libraries — including the target/occt/ generated by a previous bundled build.

  # Cargo.toml
  chijin = { version = "0.2", features = ["prebuilt"], default-features = false }
  

  # Shell (point to the bundled build output, or any other OCCT installation)
  export OCCT_ROOT=/path/to/occt
  cargo build
  

License

This project is licensed under the MIT License.