About FOSSIL

FOSSIL (FOrtran Stereo Litography parser) is a pure Fortran 2003+ library for reading, writing, and manipulating STL (stereolithography) mesh files. It provides three OOP-designed types — file_stl_object, surface_stl_object, and facet_object — that together handle the full lifecycle from file I/O to advanced geometry operations.

Modern computational science and engineering tools often require STL mesh handling. FOSSIL fills that gap with a clean, user-friendly API — no C or C++ dependencies, no external mesh libraries.

The library is designed with a test-driven approach; every surface operation is exercised by an automated test program in src/tests/.

Authors

• Stefano Zaghi — @szaghi

Contributions are welcome — see the Contributing page.

Copyrights

FOSSIL is distributed under a multi-licensing system:

Use case	License
FOSS projects	GPL v3
Closed source / commercial	BSD 2-Clause
Closed source / commercial	BSD 3-Clause
Closed source / commercial	MIT

Anyone interested in using, developing, or contributing to FOSSIL is welcome — pick the license that best fits your needs.