Merge pull request fffaraz#479 from myd7349/master

Graphics: Add libigl, NanoVG

README.md

@@ -361,7 +361,9 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [Horde3D](https://github.com/horde3d/Horde3D) - A small 3D rendering and animation engine. [EPL]
 * [Ion](https://github.com/google/ion) - A small and efficient set of libraries for building cross-platform client or server applications that use 3D graphics. [Apache2] [website](https://google.github.io/ion/)
 * [Irrlicht](http://irrlicht.sourceforge.net/) - A high performance realtime 3D engine written in C++. [zlib]
+* [libigl](https://github.com/libigl/libigl) - Simple C++ geometry processing library. [MPL2]
 * [magnum](https://github.com/mosra/magnum) - Lightweight and modular C++11/C++14 graphics middleware for games and data visualization. [MIT] [website](http://magnum.graphics)
+* [NanoVG](https://github.com/memononen/nanovg) - Antialiased 2D vector drawing library on top of OpenGL for UI and visualizations. [Zlib]
 * [Ogre 3D](http://www.ogre3d.org/) :zap: - A scene-oriented, real-time, flexible 3D rendering engine (as opposed to a game engine) written in C++. [MIT]
 * [OpenSceneGraph](http://www.openscenegraph.org/) - An open source high performance 3D graphics toolkit. [OSGPL]
 * [OpenSubdiv](https://github.com/PixarAnimationStudios/OpenSubdiv) - Pixar's library for evaluating and rendering subdivision surfaces on CPU and GPU. [Modified Apache2]