Vector math, yay.
I'm not sure if the server codebase has a complete vector implementation, and vector math always confuses me, but I believe you'd want something like this pseudocode:
Code:
Vector a(pusher->GetX(), pusher->GetY(), 0);
Vector b(target->GetX(), target->GetY(), 0);
Vector c = a - b;
c.normalize();
c *= MakeRandomFloat(0, 0.1f); //can leave out if the amount of push should equal 1 unit
b -= c;
Where
b ends up being the X+Y position of the target pushed back by the randomized number of units away relative to the pusher's X+Y position. For NPCs you'd just update their position to that and then send out position update packets. Not sure how to apply to Clients; same kind of thing might be okay.
I leave it to you to look up the vector operations if needed cuz I hate em. Maybe we already have functions for that stuff though, too lazy to look right now.
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