Unity & C# ~ UI Image Fillamount 부드럽게 움직이게 하는 법

using UnityEngine.UI;

Image circleProgress;

private const float loopTimeValue = 1.0f;	//그리는데 걸리는 시간
public AnimationCurve loopAnimCurve; 		//그리는 속도를 조정해줄 애니메이션 커브

private float targetValue = 0.0f;
private float currentValue = 0.0f;

void Awake
{
 targetValue     = 목표값 입력;
 currentValue    = 0; //현재값 초기화

 circleProgress.fillAmount = 0.0f;   //progress fillamount 초기화
 
 StartCoroutine(MoveProgressCoroutine());
}

 IEnumerator MoveProgressCoroutine()
 {
  	
    var targetFillAmount = currentValue / targetValue;
    var currentFillAmountValue = circleProgress.fillAmount;
    var loopTime = 0.0f;

    while (loopTime < loopTimeValue)
    {
        loopTime += (Time.fixedDeltaTime * 0.1f);

        circleProgress.fillAmount = Mathf.Lerp(currentFillAmountValue, targetFillAmount, loopAnimCurve.Evaluate(loopTime));

        yield return null;
    }
 }