So I just wanted to know how you could make a teleport where you walk threw a entity and it would teleport you to a location (Like when the rifts in black ops 3)

TeleportMeInit(){
	trigs = GetEntArray( "teleportme","targetname" );//trigger_multiples wiht targetname of teleportme
	array_thread( trigs,::TeleportMe );
}
TeleportMe(){
	while(1){
		self waittill("trigger", who);
		if(IsPlayer( who )){
			dest = getstruct( self.target,"targetname" );//in radiant, add a struct at destination, select your trigger then your struct and press w
			who DontInterpolate(  );
			who SetOrigin( dest.origin );
		}
	}
}

whats this?

DontInterpolate

I haven't played much BO3, so I'm not sure there, but in waw, to teleport a player, just use setorigin();
http://wiki.modsrepository.com/index.php?title=Call_of_Duty_4:_Scripting_Reference_-_Player::SetOrigin

So your ent would most likely be a trigger multiple, you would get it and wait till it was triggered, then check if it were a player, and setorigin. Something like this:

TeleportMeInit(){
	trigs = GetEntArray( "teleportme","targetname" );//trigger_multiples wiht targetname of teleportme
	array_thread( trigs,::TeleportMe );
}
TeleportMe(){
	while(1){
		self waittill("trigger", who);
		if(IsPlayer( who )){
			dest = getstruct( self.target,"targetname" );//in radiant, add a struct at destination, select your trigger then your struct and press w
			who DontInterpolate(  );
			who SetOrigin( dest.origin );
		}
	}
}