ranged attack and the distance between attacker and attackee

[magiceye]

There are 3 weapon type: BASE_ATTACK, OFF_ATTACK, RANGED_ATTACK in mangos. All of them is implemented as timer. But for ranged attack, the health update time is dependent on distance between attacker & attackee. I have not found any code about this calculation. Did mangos implements it? In 'Unit::AttackerStateUpdate' (02502 line in Unit.cpp):

uint32 hitInfo;

if (attType == BASE_ATTACK)

hitInfo = HITINFO_NORMALSWING2;

else if (attType == OFF_ATTACK)

hitInfo = HITINFO_LEFTSWING;

else

return; // ignore ranged case

What is this mean? It means have not implement yet or implements in another place?

How server do that? Simulate bullet or spell (such as Frostbolt) fly?