2D Character rotation - Localscale alternative?

Unity Engine
1

Hello there,

I have been working on a 2D game for a while now and I have recently come across a widely discussed “bug?” where OnTriggerExit/Stay/Enter do not work correctly when localscale is used.
OnTriggerEnter would get called the same way OnTriggerStay did and OnTriggerExit did not get called at all.
All the code below does is sending name of the object the player has collided with to the OnGUI in a different script if the action button (E) is pressed.

using UnityEngine;
using System.Collections;

public class Buildings : MonoBehaviour {

	public static bool PlayerInRange=false;
	public static bool ActionButtonPressed=false;

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {

	}

	void OnTriggerStay2D(Collider2D other) {

		IsActionButtonPressed ();
				
	}

	void OnTriggerExit2D(Collider2D other)
	{
		Debug.Log ("Bye");
		ActionButtonPressed = false;
	}

	void IsActionButtonPressed()
	{
		if(Input.GetKeyDown (KeyCode.E))
		{
			ActionButtonPressed=true;
			UI.MenuToDisplay = gameObject.name;
		}
	}	
}

This is the code responsible for rotating player’s character. With the localscale shown below, the above code did not work. As soon as 3 lines(6 in total, 3 for each direction) were taken out, OnTrigger worked just fine.

		public void LeftRightMovement () //Left/Right movement method
		{
				AnimMovement.SetFloat ("Speed", Mathf.Abs (Input.GetAxis (axisNameMovement)));
				if (Input.GetAxis (axisNameMovement) < 0) {
						Vector3 newScale = transform.localScale; //Removed this
						newScale.x = -5.0f;                                 //Removed this
						transform.localScale = newScale;            //Removed this
						CurrentFuel -= WalkFuelUsage; //subtract the fuel usage for walking from the CurrentFuel
						setDirection ("Left");
				} else if (Input.GetAxis (axisNameMovement) > 0) {
						Vector3 newScale = transform.localScale; //Removed this
						newScale.x = 5.0f;                                  //Removed this
						transform.localScale = newScale;            //Removed this
						CurrentFuel -= WalkFuelUsage;		//subtract the fuel usage for walking from the CurrentFuel
						setDirection("Right");
				}
				
				transform.position += transform.right * Input.GetAxis (axisNameMovement) * speed * Time.deltaTime;
		}

I am asking if anyone can think of an alternative to localscale. All I want is rotate player’s sprite around to correspond to the approperiate direction (left/right). Thanks in advance

2

I think it should be possible to flip a sprite by rotating it around the Y axis :wink:

transform.eulerAngles = new Vector3(0, 0, 0); // Normal

transform.eulerAngles = new Vector3(0, 180, 0); // Flipped
2 Likes
3

Had to adjust this line (right for right movement, -right for left) but you sir, are a genius :smile: Thank you!

transform.position += transform.right * Input.GetAxis (axisNameMovement) * speed * Time.deltaTime;

P.S Any disadvantage in using Vector2 instead? It is a 2D game afterall.