unity图形圆形展开

脚本如下：

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.UI;

public class CircleExpandImage : MonoBehaviour {

    public float timeSeconds = 5f;

    public float timeInterval = 0.05f;

    private Image image;

    private float duration;

    void Start()

    {

        gameObject.SetActive(false);

        image = GetComponent<Image>();

        image.type = Image.Type.Filled;

        image.fillAmount = 0f;

        image.fillOrigin = (int)Image.Origin90.TopRight;

        duration = ;

    }

    public void begin()

    {

        gameObject.SetActive(true);

        StartCoroutine(DrawCircleImage());

    }

    IEnumerator DrawCircleImage()

    {

        Debug.Log(System.DateTime.Now);

        yield return new WaitForSeconds(timeInterval);

        while (duration < 1f)

        {

            duration += 1f / ((timeSeconds - 0.1f) / timeInterval) * ;

            image.fillAmount = duration;

            yield return new WaitForSeconds(timeInterval);

        }

        Debug.Log(System.DateTime.Now);

    }

}

挂到image上，调用begin方法即可。