1

I have a player object and I have attached a sprite to it. I want to create the following effect:

When my player gets hit by an enemy, I want the sprite to blink for a short period of time, like in old arcade games (ex Sonic the Hedgehog).

How can I achieve this effect for my sprite?

Thanks in advance!

2
  1. You need to add an animation on your player
  2. In the animation window click Add Property and in the Sprite Renderer click on Enabled
  3. Add a lot of your character frames in the animation and uncheck the box on the sprite renderer on every other frame
  4. Make a script to have this animation play every time the player is hit
4

@parisk85
Here is the coding method if someone does not like the animation one :-
(in this you will enable and disable the SpriteRenderer component at regular time intervals

create two timers :- (just copy paste them in your code :))
//Sprite blinking effect

 public float spriteBlinkingTimer = 0.0f;
public float spriteBlinkingMiniDuration = 0.1f;
public float spriteBlinkingTotalTimer = 0.0f;
public float spriteBlinkingTotalDuration = 1.0f;
public bool startBlinking = false;

    void Update()
    { 
        if(startBlinking == true)
        { 
            StartBlinkingEffect();
        }
    }

    void OnTriggerEnter2D(Collider2D col)
    {
             if(something has entered :) )   //change according to your game
             { 
                       startBlinking = true;
             }
     }

     private void SpriteBlinkingEffect()
     {
       spriteBlinkingTotalTimer += Time.deltaTime;
       if(spriteBlinkingTotalTimer >= spriteBlinkingTotalDuration)
       {
	         startBlinking = false;
	        spriteBlinkingTotalTimer = 0.0f;
	        this.gameObject.GetComponent<SpriteRenderer> ().enabled = true;   // according to 
                     //your sprite
	        return;
         }
	
	spriteBlinkingTimer += Time.deltaTime;
	if(spriteBlinkingTimer >= spriteBlinkingMiniDuration)
	{
		spriteBlinkingTimer = 0.0f;
		if (this.gameObject.GetComponent<SpriteRenderer> ().enabled == true) {
			this.gameObject.GetComponent<SpriteRenderer> ().enabled = false;  //make changes
		} else {
			this.gameObject.GetComponent<SpriteRenderer> ().enabled = true;   //make changes
		}
	}
}

make changes where i mention and paste the rest of the code as it is, it will work :slight_smile:

3

animation setbool is not work when collision enemy ?

5

Hey, Im quit late but maybe for people who will search in future, here:

 private IEnumerator Blink() {
        SpriteRenderer playerSprite =  YourPlayerGameObject.GetComponent<SpriteRenderer>();

        Color defaultColor = playerSprite.color;

        playerSprite.color = new Color(1, 1, 1,1);

        yield return new WaitForSeconds(0.05f);

        playerSprite.color = defaultColor ;
    }

when calling this function, make sure you do like so:
StartCoroutine(Blink())

and if you wanna give this an arg and call it do it like so:
StartCoroutine("Blink", arg)

6

If anyone still interested there is a small package that does exactly that :slight_smile: