Archived old OpenGL gaming core.

Kajetan Johannes Hammerle df5fbe42a8 gl deletes must be safe to call for 0 without gl init 4 rokov pred
ecs 8167f17660 added missing single include guard 4 rokov pred
enet @ 808b96a7fb 142641b84b enet update 4 rokov pred
images fa96b9a846 png reader is now a generic image reader to support more formats in the 4 rokov pred
input a5c0707220 usage of new hashmap iterators 4 rokov pred
lodepng @ 7fdcc96a5e 7aae9c7c66 libpng replaced by lodepng 4 rokov pred
math ed8d223859 secure pi constant 4 rokov pred
memory 3f19a93439 removal of stack allocator 4 rokov pred
network a5c0707220 usage of new hashmap iterators 4 rokov pred
rendering fa96b9a846 png reader is now a generic image reader to support more formats in the 4 rokov pred
tests fa96b9a846 png reader is now a generic image reader to support more formats in the 4 rokov pred
utils fa96b9a846 png reader is now a generic image reader to support more formats in the 4 rokov pred
wrapper df5fbe42a8 gl deletes must be safe to call for 0 without gl init 4 rokov pred
.gitmodules b1396923f8 enet uses own fork to fix mingw build 4 rokov pred
Main.cpp fa96b9a846 png reader is now a generic image reader to support more formats in the 4 rokov pred
meson.build fa96b9a846 png reader is now a generic image reader to support more formats in the 4 rokov pred