HOOPS Visualize makes use of the following 3rd-party software:

The FreeType Project

Written and maintained by the open source community. A portable and highly efficient TrueType rendering engine.


Written by Jean-loup Gailly (compression) and Mark Adler (decompression). As quoted from the website, ZLib is “a massively spiffy yet delicately unobtrusive compression library.”

Independent JPEG Group

IJG is an informal group that writes and distributes a widely used free library for JPEG image compression.


The official PNG reference library

ICU - International Components for Unicode

A set of C/C++ and Java libraries providing Unicode and Globalization support for software applications.

The Mesa 3D Graphics Library

An open source software implementation of OpenGL, Vulkan, and other graphics API specifications.

OpenGL Extension Wrangler Library

GLEW was developed by Milan Ikits and Marcelo Magallon.

The OpenGL Extension Wrangler Library (GLEW) is a cross-platform open-source C/C++ extension loading library. GLEW provides efficient run-time mechanisms for determining which OpenGL extensions are supported on the target platform. GLEW has been tested on a variety of operating systems, including Windows, Linux, Mac OS X, FreeBSD, Irix, and Solaris.”

JSON for Modern C++