static void checkCollisions(GameEntityList& listA, GameEntityList& listB) {
assert(&listA != &listB);
for(GameEntityList::iterator i = listA.begin(); i != listA.end(); ++i) {
NEXT_I:
for(GameEntityList::iterator j = listB.begin(); j != listB.end(); ++j) {
NEXT_J:
//if one occurs then complete the action for both
if((*i)->didCollide(**j)){
(*i)->onCollide(**j);
(*j)->onCollide(**i);
const bool deleteI = (*i)->toDelete(),
deleteJ = (*j)->toDelete();
if(deleteJ) {
delete *j;
j = listB.erase(j);
}
if(deleteI) {
delete *i;
i = listA.erase(i);
if(i == listA.end()) return;
goto NEXT_I;
} else if(deleteJ) {
if(j == listB.end()) break;
goto NEXT_J;
}
}
}
}
}
static void updateEntities(GameEntityList& list) {
GameEntityList::iterator i = list.begin();
while(i != list.end()) {
(*i)->update();
if((*i)->toDelete()) {
delete *i;
i = list.erase(i);
continue;
}
++i;
}
}
