I don't think it's more useful than the normal code we would use. I also wonder if it would be any faster, probably not since it will be checking the angles constantly.

Besides, you only need a few lines:

Code:

---

function turn_towards_target()
{
  // get the direction from the entity MY to the entity YOU
  vec_set(temp,your.x); 
  vec_sub(temp,my.x);
  vec_to_angle(my.pan,temp); // now MY looks at YOU
}

---

Simplest approach would be to use pointers for your 'targets' like this:

Code:

---

entity* target1; //different kind of enemies
entity* target2;
[..]

---

Then you can use:

Code:

---

function turn_towards_target()
{
  // get the direction from the entity player to the entity target1
  vec_set(temp,player.x); 
  vec_sub(temp,target1.x);
  vec_to_angle(target1.pan,temp); 
  // enemy now looks at player
}

---

Cheers