Unity2d轮转图

最新推荐文章于 2024-11-13 00:29:47 发布

忙碌学习的小龙

最新推荐文章于 2024-11-13 00:29:47 发布

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文章标签： unity

本文链接：https://blog.youkuaiyun.com/Q100412/article/details/132327638

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1.创建一个父物体，生成一个image的预制体

代码如下：

首先计算出圆的周长，半径，弧度

using UnityEngine.EventSystems;
using UnityEngine.UI;
using DG.Tweening;

public class Set2dRotation : MonoBehaviour,IDragHandler,IEndDragHandler
{
    public Image prefeb;
    public int num = 14;
    public float space = 10;
    public float max = 1;
    public float min = 0.5f;
    float l, r, ang;
    public float dec = 10;
    float allang = 0;
    public List<GameObject> list = new List<GameObject>();
    public List<Transform> trans = new List<Transform>();
    // Start is called before the first frame update
    void Start()
    {
        l = num * (prefeb.rectTransform.sizeDelta.x +space);
        r=l/(2*Mathf.PI);
        ang=2*Mathf.PI/num;
        Move();
    }

public void Move()
    {
        for(int i = 0; i < num; i++)
        {
            if(list.Count<=i)
            {
                list.Add(Instantiate(prefeb.gameObject, transform));
                trans.Add(list[i].transform);
            }
            float x = Mathf.Sin(i * ang + allang) * r;
            float z = Mathf.Cos(i * ang + allang) * r;
            float p = (z + r) / (r + r);
            float scale = max * (1 - p) + min * p;
            list[i].transform.localPosition = new Vector3(x, 0, 0);
            list[i].transform.localScale = Vector3.one * scale;
        }
        trans.Sort((a, b) => 
        {
            if (a.localScale.x<b.localScale.x)
            {
                return -1;
            }
            else if(a.localScale.x == b.localScale.x)
            {
                return 0;
            }
            else
            {
                return 1;
            }
        });
        for (int i = 0; i < trans.Count; i++)
        {
            trans[i].SetSiblingIndex(i);
        }
    }

物体添加到集合中，根据物体的大小进行排序

 public void OnDrag(PointerEventData eventData)
    {
        allang -= eventData.delta.x / r;
        Move();
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        float dis = eventData.delta.x;
        float time=Mathf.Abs(dis / dec);
        DOTween.To((a) =>
        {
            allang -= a / r;
            Move();
        }, dis, 0, time).OnComplete(() => 
        {
            float moveang = Mathf.Asin(trans[num - 1].localPosition.x / r);
            float moveanging = Mathf.Abs(moveang * r / dec);
            DOTween.To((b) =>
            {
                allang = b;
                Move();
            },allang,allang+moveang,moveanging);
        });
    }

由于是ui物体，所以直接使用拖拽接口，运用dotween插件实现惯性缓动效果并且实现对齐效果

效果如下：