Turning player toward enemy after bool is true/button is pressed

Questions & Answers
1

So, I need my player to still be movable but turn towards an enemy while holding down a button - kinda like a lock-on. But this all has to be in a 2D environment (It’s a top down brawler). Here’s the code part where i need to declare my “heading”:

float heading = Mathf.Atan2(movementVector.x*(-1), movementVector.y*(-1));

		if (playerLockOn == true)
		{
			transform.rotation = ///NEED IDEAS HERE///;
		}else{

		transform.rotation = Quaternion.Euler (0f,0f,heading*Mathf.Rad2Deg);
		}

Any ideas on how to go on about this?
I’ll post my full code down below:

using UnityEngine;
using System.Collections;

public class Player_Movement : MonoBehaviour 
{

	private Vector2 movementVector;

	private float movementSpeed = 5;
	// Use this for initialization

	private float heading;
	private Quaternion rotationToHold;

	private bool movingX;
	private bool movingY;

	public bool wallTrigger;
	public bool playerLockOn;

	public Animation anim;

	public Transform Enemy;

	void Start () 
	{
		anim = GetComponentInChildren<Animation> ();
		Enemy = GameObject.Find ("Test Enemy").transform;
	}



	// Update is called once per frame
	void Update () 
	{
		//Checks, if player attacks and does animation
		if (Input.GetKeyDown ("joystick button 2")) {
			anim.Play ();
		}

		//Player Locking on to enemy
		if (Input.GetKey ("joystick button 0")) {
			playerLockOn = true;
		} else {
			playerLockOn = false;
		}
			

		movementVector.x = Input.GetAxis ("LeftJoystick_X") * movementSpeed;
		movementVector.y = Input.GetAxis ("LeftJoystick_Y") * movementSpeed;
		///Moving the Player
		GetComponent<Rigidbody2D>().velocity = new Vector2 (movementVector.x, movementVector.y*(-1));

		///turning the player and checking if defending for lockOn

		float heading = Mathf.Atan2(movementVector.x*(-1), movementVector.y*(-1));

		if (playerLockOn == true)
		{
                          transform.rotation = //???//
		}else{

		transform.rotation = Quaternion.Euler (0f,0f,heading*Mathf.Rad2Deg);
		}

		//movement checks in order to keep rotation after letting go of stick
		if (movementVector.x == 0)
		{
			movingX = false;
		}
		else{
			movingX = true;
		}

		if (movementVector.y == 0) {
			movingY = false;
		} else {
			movingY = true;
		}


		if (movingX || movingY == true) {
			rotationToHold = transform.rotation;
		} else {
			transform.rotation = rotationToHold;
		}

		///check if Player is inside the arena and restric his movement if not
		if (wallTrigger == true) {
			movementSpeed = 0;
		} else {
			movementSpeed = 5;
		}
	}

	void OnTriggerEnter2D (Collider2D other)
	{
		wallTrigger = false;
	}

	void OnTriggerExit2D (Collider2D other)
	{
		wallTrigger = true;

		var magnitude = 2500;

		var force = transform.position - other.transform.position;

		force.Normalize ();
		GetComponent<Rigidbody2D> ().AddForce (-force * magnitude);


	}
}

Thank you guys and gals for any help!

2

Try something like this in your if playerLockOn statement (Untested):

Vector3 diff = Enemy.position - transform.position;
diff.Normalize();

float rot_z = Mathf.Atan2(diff.y, diff.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.Euler(0f, 0f, rot_z - 90);