Give Up GitHub

This project has given up GitHub. (See Software Freedom Conservancy's Give Up GitHub site for details.)

You can now find this project at https://codeberg.org/apicici/clipper-luajit-ffi instead.

Any use of this project's code by GitHub Copilot, past or present, is done without our permission. We do not consent to GitHub's use of this project's code in Copilot.

Join us; you can give up GitHub too!

clipper-luajit-ffi

LuaJIT FFI bindings for the C++ version of Angus Johnson's Clipper library.

Pre-built binaries

Pre-built binaries can be found in the releases page for the following systems/architectures:

Linux x64
Windows x86, x64
macos x64

Compilation

The shared library required for LuaJIT FFI can be compiled using CMake with the provided CMakeLists.txt.

Usage

C++ library

Refer to the Clipper library's documentation for usage of the C++ library.

LuaJIT bindings

Place the shared library (clipper.so, clipper.dll, or clipper.dylib, depending on the system) and clipper.lua somewhere where they can be found by require. You may need to modify package.path and package.cpath.
Require the library with
```
local clipper = require "clipper"
```

Notes

Lua numbers are automatically converted to Clipper's CInt type. However, CInt cdata objects are not automatically converted to numbers (use tonumber to convert them).
FFI does not use explicit pointers or references. Just pass an object to a function, and it will be treated as a value, pointer, or reference as necessary

Clipper Path and Paths are wrapped in Lua and (mostly) behave as std::vector. Usage examples:

path = clipper.Path() -- initialise empty vector
path.push_back(clipper.IntPoint(1,2)) -- add IntPoint to vector

path = clipper.Path(3) -- initialise vector of size 3
path[0] = clipper.IntPoint(2, 3) -- specify first IntPoint in vector