I want to start work on my on 3d engine. Top down angled like in myth or sacrifice. Just a few question about classes. I''ve got an indepth knowledge of classe. How to use em and what they can do and such but what specifically would I use them for in a game like myth. monsters maybe? Or other similiar things

Monsters, items, all game objects, hardware interfaces (e.g. Direct3d and OpenGL), ADT''s. And lots of other stuff.

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Martee