Is this possible with qt?

[Nathan2222]

Sorry about the rudeness. Sorry.

If you want to use DirectX directly in a program that is also using the Qt library nothing is stopping you (in some configurations Qt5 uses a DirectX abstraction layer (ANGLE) itself). Of course you will have to develop for Windows only and you will likely have to use Microsoft's SDK and compilers (possibly counter to your "Platform: 2. Others later on" goal). Ogre3d abstracts some of that away but requires Microsoft's tool chain on Windows AFAICT.

If there isn't a possibility of integrating both opengl and directx support like ogre3d does, then it looks like i'll have to settle for windows only

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Added after 6 minutes:

Just read a thread on the ogre3d forums on how it manages both directx and opengl. It says it uses separate rendersystem plugins for dx and opengl. I don't know if that is feasible for a game engine