Hallo, wie gehts!

I don't speak german either but you've gotta love http://ets.freetranslation.com/

English!
Code:
function setCentre(localEnt1,localEnt2){
	me=localEnt1; you=localEnt2;

	var vec1; var vec2;

	//stores the positions into vectors
	vec_set(vec1,my.x);
	vec_set(vec2,your.x);

	//gets the centre of the 2 positions
	vec_set(temp,my.x);
	vec_add(temp,your.x);
	vec_scale(temp,0.5);

	//set the objects position
	vec_set(ball.x,temp); //name of you entity

	//sets the obejcts position
	vec_set(temp,vec1);
	vec_sub(temp,vec2);
	vec_to_angle(ball.pan,temp);
}

function main(){
	//entities to find the centre of
	setCentre(blue_player,red_player);
}


Deutsch ?
Code:
function setCentre(localEnt1,localEnt2){
	me=localEnt1; you=localEnt2;

	var vec1; var vec2;

	//Speichert die Positionen in Vektoren
	vec_set(vec1,my.x);
	vec_set(vec2,your.x);

	//Erhält die Mitte von den 2 Positionen
	vec_set(temp,my.x);
	vec_add(temp,your.x);
	vec_scale(temp,0.5);

	//Setzt die Objekte einstellen
	vec_set(ball.x,temp); //name of you entity

	//Setzt die obejcts Position
	vec_set(temp,vec1);
	vec_sub(temp,vec2);
	vec_to_angle(ball.pan,temp);
}

function main(){
	//Wesen, die Mitte von
	setCentre(blue_player,red_player);
}


Hope this helps
Hofft, dass dies hilft