nbody References https://kripken.github.io/emscripten-site/docs/porting/multimedia_and_graphics/ https://lyceum-allotments.github.io/2016/06/emscripten-and-sdl2-tutorial-part-5-move-owl/ http://wiki.libsdl.org/CategoryRender https://www.khronos.org/files/openvg-quick-reference-card.pdf (Not using, bot could use?)