Im a bit unsure what is the right API for me..
Any suggest?
For what?
OpenGL is cross platform, fast and creates new technologies yet alone following them. Unfortunately doesn't have a good driver support especially by ATI/AMD.
DirectX is Windows only (and yes, Xbox), not as fast as OpenGL, DirectX 11 has yet started to follow latest technologies, Microsoft monopoly. Has a good driver support.
This bit of history probably won't be overly helpful, but should interest you:
http://programmers.stackexchange.com/que...8055#88055
At the end of the day, you are going to have to research and decide what tool is the best for the goals you have in mind. Other than that, pick the one you feel you are more comfortable using.
Answering our questions instead of writing just bump would be more polite... and would bump the thread again...
Is it a PC game or mobile? For mobile I'd suggest Qt.
Then OpenGL. I got a Computer Graphics course and I can say they're the most suitable couple. Like C# DirectX
Any good books for game development?