Where do I find good information on how to program 3D videogames?

I’ve been studying C++ for a while and I understand fairly well the basics of game programming by now, but aside for programming basic computer versions of tabletop games without mouse interface on allegro, which is extremely boring and I’ve already pretty much mastered, I can find nothing that helps.

I can’t find a tutorial that explains how to render a 3D level with characters and a GUI, for instance, nor can I find a decent explanation on how to make 3D representations of the game simulation sync up to the simulation itself.

You see, with 2D games with a fixed size, or even with a variable size, it’s easy. You can work out the math and make everything fit together nicely by giving the position values relative to the size of the window, and that’s it. Even those faux-3D games back in the doom era work by the same basic principles.

3D can’t work in the same way, though. There’s dynamic cameras, for one, so the positions on the screen aren’t relative to the window, but to some other arbitrary point of reference of which I’m unaware, and the positions are most definitively not in pixels.

I don’t need something too complex, I just want to make a turn based strategy game, basically I need to know how to put chess pieces on a chessboard, only the chessboard could be anything from a street to a ruined building (though still divided orderly like an ordinary chess board of varying sizes and proportions).

Let me know if you need more information on what I’m planning.

Also, and this might sound a bit strange, though I have a working knowledge of classes and objects in C++, I’d love to find a theoretical explanation to clear up some doubts I have about their usage, so if you know where I can find that as well, I’d appreciate it