Enemy ignore player if object blocked his sight

Questions & Answers
1

Hi … how to let enemy know there same thing block his sight to see player

im using “vector3.angle” to make enemy sight

2

void Update() {
//ray shooting from my position towards enemy
Ray ray = new Ray (transform.position, enemy.position - transform.position);

		//this object will hold the info of the hit that will occure:
		RaycastHit hit = new RaycastHit ();

		//do the ray shooting and store the outcome in the 'hit'
		Physics.Raycast (ray, out hit);

		//if the ray is in the view range (60 deg) of our character:
		if(Vector3.Angle(ray.direction, transform.TransformDirection(Vector3.forward) < 30f)
		   //good, ray is shot forward in 60 degree view range, carry on to the next test
		else
		   //ray's not in 60 degree view range, kill the process
		   return;

		//if the ray hit the enemy:
		if(hit.collider.tag == "enemy")
			;// saw the enemy, rape him;
		else
		   return; //ray, shot towards the enemy hit something else, kill the process
		
		
	}