koobas.hobune.stream
How to Fade a Sprite after time has passed since it stops moving
Hello, I am trying to fade a sprite after some time has passed since the object stops moving. I tried finding it in other questions but I didn't find it.
Currently I have the following:
public class MoneyStates : MonoBehaviour { MoneyMovement moneyMovement; SpriteRenderer moneySprite; float alpha; bool isMoving;
// Start is called before the first frame update
void Start()
{
moneyMovement = GetComponent<MoneyMovement>();
moneySprite = GetComponent<SpriteRenderer>();
isMoving = false;
}
// Update is called once per frame
void Update()
{
isMoving = moneyMovement.isMoving;
if (isMoving)
{
alpha = 1f;
moneySprite.color = new Color(moneySprite.color.r, moneySprite.color.g, moneySprite.color.b, alpha);
} else
{
Invoke("Fade", 3);
}
}
void Fade()
{
StartCoroutine(Devalue());
}
IEnumerator Devalue()
{
for (float f = 1f; f >= 0; f -= 0.01f)
{
alpha = f;
moneySprite.color = new Color(moneySprite.color.r, moneySprite.color.g, moneySprite.color.b, alpha);
yield return new WaitForSeconds(0.01f);
}
}
}
It is not really working. Do you guys have any suggestions?
[Min(0)] public float DelayBeforeFade = 3;
[Min(0.01f)] public float FadeDuration = 1;
private MoneyMovement moneyMovement;
private SpriteRenderer moneySprite;
private float alpha;
private float delay;
// Start is called before the first frame update
void Start()
{
moneyMovement = GetComponent<MoneyMovement>();
moneySprite = GetComponent<SpriteRenderer>();
alpha = moneySprite.color.a;
delay = DelayBeforeFade;
}
// Update is called once per frame
void Update()
{
if (moneyMovement.isMoving)
{
alpha = 1f;
delay = DelayBeforeFade;
}
else if(delay <= 0)
{
alpha = Mathf.Max(alpha - Time.deltaTime / FadeDuration, 0);
}
else
{
delay -= Time.deltaTime;
}
moneySprite.color = new Color(moneySprite.color.r, moneySprite.color.g, moneySprite.color.b, alpha);
}
Hi Hellium, thank you for your answer it works! I would like to understand what is the [$$anonymous$$in(0)] before the variable, it is the first time I see it. I would really appreciate it if you could explain it. Thank you!
Glad it worked.
The $$anonymous$$in attribute prevents the value from going below the specified value in the inspector. In this case, it's used to ensure the fade duration is greater than 0 (otherwise you would get a DivideByZero exception) and to ensure the delay is greater or equal to 0 (because negative duration does not make sense)
https://docs.unity3d.com/ScriptReference/$$anonymous$$inAttribute.html
There is also a $$anonymous$$ax attribute and a Range one (= value between $$anonymous$$ and max)
