nifly by ousnius

C++ NIF library for the NetImmerse File Format (NetImmerse, Gamebryo, Creation Engine).
Created with a clean-room design.

Also check out NiflySharp for a native C# / .NET version of nifly that uses source generation based on nifxml.

Features

• Reading and writing NIF files (NetImmerse, Gamebryo, Creation Engine)
• Cross platform (Windows, Linux, macOS)
• No external dependencies (tests optional)
• Includes basic functionality often used for 3D meshes
• NIF blocks unknown to the library are kept untouched
• Lots of other helper functions
• Current file support:
  • Fallout 3
  • Fallout: New Vegas
  • Fallout 4
  • Fallout 4 VR
  • Fallout 76
  • The Elder Scrolls IV: Oblivion
  • The Elder Scrolls V: Skyrim
  • The Elder Scrolls V: Skyrim Special Edition
  • The Elder Scrolls V: Skyrim VR
  • Starfield (initial support, no mesh/morph files)

Building

• C++ 17 compiler support required
• Use the included CMake lists for building - or simply include the headers and source in your project
• (optional) To get Catch2 for running the tests, install its CMake package (or get it via vcpkg):

git clone -b v2.x https://github.com/catchorg/Catch2.git
cd Catch2
cmake -Bbuild -H. -DBUILD_TESTING=OFF
cmake --build build/ --target install  #with admin elevation (or sudo) depending on your cmake prefix path

• Support for xmake added with #48

Libraries used

• half - IEEE 754-based half-precision floating point library (v1.12.0) for 16-bit floats
• Miniball (v3.0) for generating bounding spheres
• Catch2 (v2.x branch) for running tests

nifly is used by

• BodySlide and Outfit Studio
• SSE NIF Optimizer
• Cathedral Assets Optimizer

Credits

• Contributors to nifly
• ousnius
• jonwd7
• Caliente
• NifTools team and contributors