Unity Fill Amount, Stop Animation Once Condition Is Met

Question

So, I have a image that starts off with a fill of 0. Then once a Boolean is true, it runs some code that fills the image to a specific amount. My problem is that I am adding a condition to check if the fill amount is met, but the fill amount goes beyond the max amount.

private void Update() {
  if (update) {
    if (icon.fillAmount < icon.fillAmount + amount) {
      icon.fillAmount += amount * Time.deltaTime;
      Debug.Log(icon.fillAmount);
    } else update = false;
  }
}

In my code, I have an update boolean, and when it is true, it checks if the fill amount less than the maximum fill amount. If that is false, then it runs a line of code to increment the fill amount smoothly, then it logs the fill amount, otherwise it changes the update boolean to false. But, for example if amount = 0.5f , when I log the fillAmount , it does over amount . I think it has to do with the Time.deltaTime , but I do not know how to solve it.

Answer 1

Use Mathf.MoveTowards to achieve what you want. According to Unity3D documentation this function:

Moves a value current towards target.

This is essentially the same as Mathf.Lerp but instead the function will ensure that the speed never exceeds maxDelta . Negative values of maxDelta pushes the value away from target.

  if (update) {
    if (icon.fillAmount < 1) {
      icon.fillAmount = Mathf.MoveTowards(icon.fillAmount, 1, amount * Time.deltaTime);
      Debug.Log(icon.fillAmount);
    } else update = false;
  }