>I find that I am always writing APIs, and it's not always clear which is going to be 'public' or 'private'. I understand the sentiment, and I believe in SOLID

>I find that I am always writing APIs, and it's not always clear which is going to be 'public' or 'private'. I understand the sentiment, and I believe in SOLID principles. I just mean that I'm not building a library that other people will use. No one is ever going to subclass my "player" class, not even me. Unlike my sound or graphics or AI code it's unlikely to be reused even in another game. >Hm, you mean like _char.aim_? Where char may be a Monster, Soldier, or ? Yes. My "aim" method is 90% identical for all types, about 10% specific to the type - if(type==monster){do this}; if(type==soldier){do that} I've heard "if you're using if statements like this you're probably not using OOP correctly", but in my case I don't want six nearly identical methods spread out in six class files. That's repeating myself, which is the real sin I'd rather avoid; it comes back to haunt me if the map format or some other data structure changes.