On Wednesday, 28 February 2018 at 12:02:27 UTC, Kayomn wrote:
Is this a DerelictGL3 bug? Am I missing something else that I should be initializing? Other things like glClear() seem to be working fine.
No, not a bug. glBegin is one of the deprecated OpenGL functions. DerelictGL3 these days doesn't attempt to load any of the deprecated stuff unless you explicitly tell it to. To do so, you need to override the default behavior at compile time. Please see the DerelictGL3 documentation for the details:
http://derelictorg.github.io/packages/gl3/
