[Request] Is player in range

I'm trying to figure out a way to detect coordinates.

Pretty much something that checks to see if a player is in a distance of xyz.

Could someone lend me a hand? Thanks in advance.

Look in the server at ZombieSpawn it detects if the is in range


EDIT:
Here it is:


ServerGameLogic.cpp Line ~1191:

Quote:

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if((plr->GetPosition() - pos).LengthSq() < distSq)

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pos is your position
plr->GetPosition() is obviously the player pos
and distSq is the max distance squared (x²)