I want to draw, at the moment, once every 0.25 seconds. I also want to watch for user input constantly, and move the "camera" every time a key is pressed (but only allow them to move once every so often). And I don't want to continually loop, because I think that hogs CPU; I just want to do something if there's something to do, or it's time to draw.
The only thing I've managed to do, that works in some respect, checks the console input buffer every time through the loop and sets the appropriate element in an array of bools depending on what key event comes through. Then it draws, and Draw() checks the time elapsed between the last time we drew and now, and if we're good to go, it checks the arrow key booleans and moves accordingly. The problem here is that it only works if we held the key down when Draw() actually draws. If we hit an arrow key after 50ms since the last Draw(), and let go at 100ms since the last draw, it's like we never hit the key at all - Draw() doesn't recognize that we tried to move. And it keeps looping whether we have anything to do or not.
Obviously I'm new to handling keyboard input like this. I think WaitForMultipleObjects() could help (because it can wait on an input buffer handle), but I still have no idea how to proceed. A poke in the right direction would be hugely appreciated! =\