3d Math, 3d geometric primitives, 3d model loading and manipulation, 3d sounds, music, ambient sound lists. cached texture resources, Octree I/O management for mouse and keyboard.

depends on GrayLib, GrayCore

optionally uses DirectX libraries for windows. "#define USE_DXX" USE_DX9 !USE_DXM - emulate all used DirectX math calls.

Last version of DirectX to support XP and DX9 was Nov 2007 dxsdk_november2007.exe https://www.microsoft.com/en-us/download/details.aspx?id=13287

Todo: Update this to DirectX11 for >= Windows 7 support https://www.microsoft.com/en-us/download/details.aspx?id=6812