This is the core of the Kalman filter framework code from OSVR-Core, plus the newer "unified" video tracker plugin, modified to build without OSVR.
This project: Licensed under the Apache License, Version 2.0.
Some directories under /vendor are in fact not external libraries vendored-in, but "internally-vendored" - developed as a part of OSVR-Core, and likewise licensed under the Apache License 2.0, but are logically distinct from the Core in their functionality and are thus kept separate in anticipation of potential splitting off into a separate project at some future point. These include /vendor/comutils.
/cmake- Git subtree from https://github.com/rpavlik/cmake-modules used at compile-time only. Primarily BSL 1.0, some items under the license used by CMake (BSD-style)/vendor/com_smart_pointer- Header (for integratingboost::intrusive_ptrwith MS COM) extracted from the following project and file: https://github.com/rengeln/nyx/blob/master/src/Prefix.h, modified as needed for compatibility. MIT license./vendor/eigen- Unpacked release from http://eigen.tuxfamily.org/ - header-only library under the MPL2 (a file-level copyleft, compatible with proprietary software), defineEIGEN_MPL2_ONLYto exclude modules with other license from the build (done in OSVR-Core build system)./vendor/FloatExceptions- Modified code (original author: Bruce Dawson for development use only, usage should not be committed or merged into master. MIT licensed./vendor/folly- Submodule of C++11 components originally developed and widely used at Facebook. Apache License, Version 2.0./vendor/optional-lite-1.2.2- Single-header std::optional implementation/backport from https://github.com/martinmoene/optional-lite. BSL 1.0./vendor/util-headers- Subset of headers installed from https://github.com/rpavlik/util-headers. BSL 1.0./vendor/variant-lite-3.2.0- Single-header std::variant implementation/backport from https://github.com/martinmoene/variant-lite. BSL 1.0.