Dependencies for PyEasy3D Bindings

To properly install and use the PyEasy3D bindings module, all dependencies must be handled correctly. Below is a detailed list of dependencies for each platform.

Core Dependencies

The PyEasy3D module (PyEasy3D.pyd on Windows, PyEasy3D.so on macOS/Linux) depends on the following libraries:

1. Python Runtime

Windows: python3xx.dll (where 3xx corresponds to the Python version, e.g., python310.dll for Python 3.10).
macOS: libpython3.x.dylib (where x corresponds to the Python version, e.g., libpython3.10.dylib for Python 3.10).
Linux: libpython3.x.so (where x corresponds to the Python version, e.g., libpython3.10.so for Python 3.10).

2. Easy3D Libraries

The PyEasy3D module depends on the following Easy3D libraries:

easy3d_algo.dll (or .so/.dylib)
easy3d_core.dll (or .so/.dylib)
easy3d_fileio.dll (or .so/.dylib)
easy3d_gui.dll (or .so/.dylib)
easy3d_kdtree.dll (or .so/.dylib)
easy3d_renderer.dll (or .so/.dylib)
easy3d_util.dll (or .so/.dylib)
easy3d_viewer.dll (or .so/.dylib)

Optional Dependencies

If additional features are exposed in the bindings, the following dependencies must also be included:

1. `easy3d_algo_ext` (CGAL Dependencies)

If the bindings expose easy3d_algo_ext, the following dependencies are required:

easy3d_algo_ext.dll (or .so/.dylib)
- CGAL Dependencies:
  - libgmp-10.dll (or .so/.dylib)
  - libmpfr-4.dll (or .so/.dylib)

2. `easy3d_video` (FFMPEG Dependencies)

If the bindings expose easy3d_video, the following dependencies are required:

easy3d_video.dll (or .so/.dylib)
- FFMPEG Dependencies:
  - avcodec-58.dll (or .so/.dylib)
  - avformat-58.dll (or .so/.dylib)
  - avutil-56.dll (or .so/.dylib)
  - swresample-3.dll (or .so/.dylib)
  - swscale-5.dll (or .so/.dylib)

Handling Dependencies

To ensure the PyEasy3D module works correctly, follow these steps:

1. Place Dependencies in the Same Directory

Place all .dll (Windows), .so (Linux), or .dylib (macOS) files in the same directory as the PyEasy3D module (PyEasy3D.pyd, PyEasy3D.so, or PyEasy3D.dylib).

2. Add Directory to `PATH` (Windows) or `LD_LIBRARY_PATH` (Linux/macOS)

Windows: Add the directory containing the .dll files to the PATH environment variable.

import os
os.environ['PATH'] += os.pathsep + r"F:\3_code\Easy3D-build\lib\release"

Linux/macOS: Add the directory containing the .so or .dylib files to the LD_LIBRARY_PATH environment variable.
```
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/dependencies
```