[c#]How to check if an object is facing another?

Hi all! So i`m making a 2d shooter and making an enemy that will dodge bullets,[13693-без+имени-1.png|13693]

Enemy is following player, but if player faces enemy,it changes movement.Thanks!

	void Update () 
		player = GameObject.FindGameObjectWithTag("Player");
		if(player !=null)
		transform.Translate(Vector3.forward * Time.deltaTime * speed);
		//if facing player change movement			

There are a few different ways to do this.

A simple approach would be to use the player’s transform.forward and compare the angle with a vector to the enemy:

float angle = 10
if  ( Vector3.Angle(player.transform.forward, transform.position - player.transform.position) < angle) {


Another way is to use the dot product. It will return 1 if facing and -1 if looking the opposite. It is based on cosine function so 0 is 90 degrees.

float dot = Vector3.Dot(transform.forward, (other.position - transform.position).normalized);
if(dot > 0.7f) { Debug.Log("Quite facing");}

0.7 if 45 degrees (approximate of cos(45)) so it would print when facing within 90 degrees. Make that value closer to 1 to reduce the vision angle.

I know this is old but maybe this will help someone as it did for me. This post helped me go in the right direction. Below is a method I wrote for a 2D game. This is set for object orientation of my game so may have to play with parameters for your game. (I have Y forward, X right -it’s a top down game)

 bool IsLookingATObject(Transform obj, Transform targetObj)
        //direction of the target as a vector
        Vector3 direction = targetObj.position - obj.position;

        float ang = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;

        //current angle in degrees
        float anglecurrent = obj.eulerAngles.z;
        float checkAngle = 0;

        //Checking to see what quadrant current angle is at
        if (anglecurrent > 0 && anglecurrent <= 90)
            checkAngle = ang - 90;
        if (anglecurrent > 90 && anglecurrent <= 360)
            checkAngle = ang + 270;

       //If current angle is equal to the angle that I need to be at to look at the object, return true
        //It is possible to do "if (checkAngle == anglecurrent)" but some times you don't get an exact match so do something like below to have some error range.
        if (anglecurrent<= checkAngle+0.5f && anglecurrent >= checkAngle - 0.5f)
            return true;  
            return false;

Hey there, check out that gist:

public Transform other;

private bool IsFacingObject(){
  // Check if the gaze is looking at the front side of the object
  Vector3 forward = transform.forward;
  Vector3 toOther = (other.transform.position - transform.position).normalized;

  if(Vector3.Dot(forward, toOther) < 0.7f){
    Debug.Log("Not facing the object");
    return false;
  Debug.Log("Facing the object");
  return true;


you can check if two objects facing one another easily by using Dot product between them. the result in the case of facing each other is -1. then check if the angle between your agent and target is bigger than 0 or 7 deg as a threshold.

if (Vector3.Dot(rb.velocity.normalized, targetRb.velocity.normalized) == -1)
if (Vector3.Angle(playerRigidbody.velocity, targetRigidbody.velocity) <= 7)
{ // the facing each other }