Flipping character sprite to look the way he's moving,How to make my character flip when walking?

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 public class PlayerMovement : MonoBehaviour
  {
      public LayerMask m_LayerMask;
      public Rigidbody2D rgb;
      public BoxCollider2D groundChecker;
  
      public float speed;
      public float acceleration;
      public float jumpHeight;
      private float currentSpeed;
      private float targetSpeed;
      private Vector2 amountToMove;
  
      
  
      // Start is called before the first frame update
      void Start()
      {
          
      }
  
      // Update is called once per frame
      void Update()
      {
          targetSpeed = Input.GetAxisRaw("Horizontal") * speed;    
          currentSpeed = IncrementTowards(currentSpeed, targetSpeed, acceleration);
          if (TengoPiso())
          { 
              if (Input.GetKeyDown(KeyCode.W))
               {
                  rgb.AddForce(new Vector2(0, jumpHeight), ForceMode2D.Impulse);
              }
          }
          
  
          amountToMove.x = currentSpeed;
          Move(amountToMove * Time.deltaTime);
      }
  
      private float IncrementTowards (float n, float target, float a)
          //n = currentSpeed
          //targer = targetSpeed
          //a = acceleration
      {
            if(n == target) // si currentSpeed = targetSpeed, devuelve a currentSpeed
          {
              return n;
          }
          else
          {
              float dir = Mathf.Sign(target - n); //n incrementa o baja para acercarse al target, en que direccion debe moverse, sea positiva o negativa.
  
              if(dir == 1)
              {
                  this.transform.localScale = new Vector3(1, 1, 1) * 3.6f;
              }
              else
              {
                  this.transform.localScale = new Vector3(-1, 1, 1) * 3.6f;
              }
              n += a * Time.deltaTime * dir;
              return (dir == Mathf.Sign(target - n)) ? n : target;
              // Condition,  devuelve si la direccion es la misma, o sea la currentSpeed no ha pasado el target
              //? adentro del if, 
              //y n: es el else, de otra manera, si ya paso, devolver al target.
          }
      }
  
      public void Move(Vector2 moveAmount)
      {
          transform.Translate(moveAmount);
      }

I did a flip in the class IncrementTowards, after getting the direction as Mathf.Sign, tho this flip doesnt work as intended, it looks the way it should when its walking but after I stop it flips again and starts flipping the opposite way after I move again. Note that the player has a weapon and firepoint on him, which mean this should flip to the other side with the character sprite.

Answer 1

Best Answer

Answer by SirPaddow · Aug 26, 2019 at 08:16 PM

It sounds weird that you want your character to face left or right depending on wether it needs to accelerate or decelerate. Are you sure what you want is not as simple as:

 if (currentSpeed < 0) {
     // face left
 }
 else if (currentSpeed > 0) {
     // face right
 }

Btw, I think it's a bad idea to rescale the gameobject to flip the sprite. You will get very strange behaviours with colliders and other components. You probably have a SpriteRenderer on your gameobject, and with it you can flip the sprite using its "flipX" property. So, somehting like:

 spriteRenderer.flipX = currentSpeed < 0;

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ThatFlor · Aug 26, 2019 at 08:37 PM 0

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You're right, the flip works like this, tho using the Sprite Renderer, flips the sprite itself and not the sons of it, but I need the character to flip with another sprite (gun), which is a son of the character, and an empty object, used as a placeholder for a firepoint (called firepoint), also inside the character in Unity. Is there a way to do it with the sprite renderer?

SirPaddow ThatFlor · Aug 26, 2019 at 09:02 PM 0

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You can either have multiple public attributes in your script, like:

 public SpriteRenderer characterSpriteRenderer;
 public SpriteRenderer weaponSpriteRenderer;
 
 // in Update()
 
 characterSpriteRenderer.flipX = currentSpeed <0;
 weaponSpriteRenderer.flipX = currentSpeed <0;

Or you can access it using GetComponentsInChildren:

 foreach (SpriteRenderer renderer in GetComponentsInChildren<SpriteRenderer>()) {
    renderer.flipX = currentSpeed < 0;
 }

In the latest, you should definitely cache the renderers, and not call this function at every frame.

ThatFlor SirPaddow · Aug 26, 2019 at 09:11 PM 0

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It worked, thanks for the help

Flipping character sprite to look the way he's moving,How to make my character flip when walking?

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