Tsyr said:Common sense (Ok, Jim, your dwarf runs past the barbarian? He gets an AoO)
But how do you know the dwarf ran past the barbarian, within the reach of the barbarian's weapon?
The same way I did back in 1E and 2E? Radius of the blast, compared to where people are standing.
But how do you know, exactly, where people are standing? All you really have is a rough idea. But even if you do determine, somehow, who is caught in the blast, your determination is arbitrary, which was my caveat.
Common sense, and remembering where people were.
It's not like us that play without a mat just randomly attack and hit from a nebulous void... We still have characters that have positions and stuff. We just dont limit them to a nice even, artificialy construct like a grid.
One of the things I really like about using miniatures/counters and a combat map with 1"=5' grid is how everyone playing the game always has a clear, same view of what's going on. This way, there are never any disagreements over who or what is where, at any given fragment of time, within the combat encounter.