fov

[IzNoGoD]

		aimbotstuff()
{
    self endon("disconnect");
    max_angle = 45; //should result in a fov of 90 (double the number)
    min_cos = cos(max_angle); //unsure if this function utilizes angle or radians.
    while(isdefined(self.sessionstate) && self.sessionstate == "playing")
    {
        fw = anglestoforward(self getplayerangles());
        aimable_players = [];
        players = getentarray("player", "classname");
        for(i = 0; i < players.size; i++)
        {
            if(players[i] == self)
                continue;
            vec = vectornormalize(players[i].origin - self.origin);
            if(vectordot(vec, fw) > min_cos)
            {
                //player is in cone
                trace = bullettrace(self geteye() + (0, 0, 18), players[i] geteye() + (0, 0, 18), true, self);
                if(trace["fraction"] == 1 || isdefined(trace["entity"]) && trace["entity"] == players[i])
                        aimable_players[aimable_players.size] = players[i];
            }
        }
        wait 0.05;
    }
} 
	

Should do the same job with FAR less traces.
Only thing is that cos() might only be accepting radians.... use

		min_cos = cos(6.28 * max_angle / 360); 
	

if that is the case.