Independent animal character interacts with 1st Person Controller

Questions & Answers
1

In a 1st Person Game I want to let interact an independent animal with the 1st Person controller.

If the animal is in the Back of the 1st Person, it will run to the 1st P. and steal points.
If the 1st P. turns and faces the animal it will run away.

I am grateful for solution strategies.

2

That’s the basic idea: get a vector from the animal to the fpc (toFpcDir) and check the angle between -toFpcDir (a vector from the fpc to the animal) and the fpc forward direction; if it’s less than some narrow angle (15, in the pseudo code below) the fpc is looking in the animal direction, thus make it beat the road; if greater than this angle, continue moving in the fpc direction until a minimum distance is reached, when you could do the attack and apply damage - something like this (animal script):

var fpc: Transform; // drag the First Person Character here

function Update(){
  var toFpcDir = fpc.position - transform.position; // animal->fpc direction
  var angle = Vector3.Angle(-toFpcDir, fpc.forward); // check the angle
  if (angle < 15){ // FPC is facing the animal:
    // run away or go back
  } else { // FPC is looking to other direction:
    // continue and attack
  }
}

The actual movement of the animal will depend on which kind of object it is. Usually live creatures are based on a CharacterController, thus you should move it with Move or SimpleMove, taking advantage of the calculated toFpcDir vector. You must also decide what exactly the animal will do when the fpc look at it: go back slowly, or turn 180 degrees and run, or a mix of the two things etc.