Decreasing Alpha from object with Hp value

Questions & Answers
1

What I cant get to work is, that the alpha value of the SpriteRenderer decreases with the Hp of the player. The hp of the player decreases over time and I multiply the value by 2,55 and apply the value to the alpha of the SpriteRenderer. The problem is, that the alpha doesn’t change in the game. But the alpha is on 0 if the Hp of the player is 0 or below. How do I fix that?

public float playerHp = 100f;
public float HpDecreasePerSec = 10f;
public float playerDmg = 1f;
public float score = 0;
public float money = 0f;
public Color alpha;
private SpriteRenderer _spriteRenderer;

private void Start()
{
    _spriteRenderer = GetComponent<SpriteRenderer>();
    alpha = GetComponent<SpriteRenderer>().color;
}

private void Update()
{
    alpha.a = 2.55f * playerHp; 
    _spriteRenderer.color = alpha;
    playerHp -= HpDecreasePerSec * Time.deltaTime;
    Debug.Log(playerHp);
}

}

2

Hi. Alpha is actually a 0-1 value.

I see what you’re trying to do is 255 when the player is at full health, so it’s the same concept:

color.a = playerHp/100f;