public Actor findClosestActor(Class c) {
List<Actor> list= getWorld().getObjects(c);
Actor closest=null;
int minDistance=1000;
for(int i=0; i<list.size(); i++) {
Actor actor=list.get(i);
int dist=calcDistanceTo(actor);
if(closest==null || dist<minDistance) {
closest=actor;
minDistance=dist;
}
}
return closest;
}
