https://ncrmnt.org/2012/06/17/%d0%bf%d1%80%d1%83%d1%84-%d0%be%d1%84-%d0%ba%d0%be%d0%bd%d1%86%d0%b5%d0%bf%d1%82-opengl-%d0%b2-%d0%b5%d0%bc%d0%b0%d0%ba%d1%81%d0%b5/?lang=ru