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1.實(shí)現(xiàn)一圈圖片斜著的效果：

首先夯巷，我們?cè)O(shè)置相機(jī)到合適的位置，然后調(diào)整角度即可哀墓。如圖：

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小提示：如果需要在ui或者別的地方上顯示這樣的效果趁餐，但是主攝像機(jī)又要拍攝場(chǎng)景，可以考慮用創(chuàng)建多一個(gè)攝像機(jī)來(lái)渲染篮绰！然后設(shè)置第二個(gè)攝像機(jī)的里面的參數(shù)即可后雷！

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前面的只是開胃小菜，接下來(lái)贾漏，我們進(jìn)入主題：

需求：實(shí)現(xiàn)一個(gè)轉(zhuǎn)動(dòng)抽獎(jiǎng)的效果候学，按下按鍵后開始轉(zhuǎn)動(dòng)，按下停止按鍵后開始減速停下纵散。

具體上代碼吧梳码，感覺不需要過(guò)多解釋了：

不過(guò)需要注意的是隐圾，這個(gè)腳本是掛在要轉(zhuǎn)動(dòng)的物體上，然后圍繞這個(gè)物體生成一圈子物體掰茶！

using System.Collections.Generic;
using UnityEngine;

/// <summary>
/// 轉(zhuǎn)動(dòng)的狀態(tài)控制
/// </summary>
public enum RotationState
{
    None = 0,
    Trun,
    Stop,
    Stoped,
}

public class MyTest : MonoBehaviour
{
    //一個(gè)無(wú)關(guān)代碼的注釋：重點(diǎn)暇藏，我生成的物體起點(diǎn)是從靠近屏幕這邊開始的起點(diǎn)，具體用的操作是設(shè)置掛載此腳本的Scale的Z為-1



    public GameObject go_Prefab;   //生成的prefab
    public float fRadius = 500;    //圓的半徑
    private int m_MaxRotNumber = 20;
    private float m_IntervalAngle = 18f;//間隔角度

    private List<GameObject> IconObj = new List<GameObject>();
    private List<RotTran> m_RectTrans = new List<RotTran>();
    private List<float> IconObjYpos = new List<float>();

    private RotationState enumRotationState = RotationState.None;//當(dāng)前狀態(tài)

    float fStopTargetAngle = 0;       //停止的目標(biāo)角度
    float fAngle = 0;                 //旋轉(zhuǎn)的角度
    public float fRotationSpeed = 200;       //旋轉(zhuǎn)速度
    float fOriginRotationSpeed = 0;   //用來(lái)記錄旋轉(zhuǎn)速度濒蒋，用來(lái)重置數(shù)據(jù)
    float fSlowDownRotationSpeed = 50;//最慢旋轉(zhuǎn)速度

    private struct RotTran
    {
        public Vector3 r_Pos;
        public Vector3 r_Eul;


        public RotTran(Vector3 pos, Vector3 eul)
        {
            r_Pos = pos;
            r_Eul = eul;
        }
    }

    private RotTran NewRot;

    // Use this for initialization
    void Start()
    {
        fOriginRotationSpeed = fRotationSpeed;

        for (int a = 0; a < m_MaxRotNumber; a++)
        {
            GameObject newTemp = GameObject.Instantiate(go_Prefab);
            newTemp.name = a.ToString();
            newTemp.transform.parent = this.transform;
            IconObj.Add(newTemp);
            //生成位置信息叨咖，圓形的公式
            // x = 原點(diǎn)x + 半徑 * 鄰邊除以斜邊的比例,   鄰邊除以斜邊的比例 = cos(弧度) , 弧度 = 角度 *3.14f / 180f（大致的參考公式）
            NewRot = new RotTran(new Vector3((Mathf.Sin((m_IntervalAngle * a) / 180 * Mathf.PI) * fRadius), 0, fRadius * Mathf.Cos((m_IntervalAngle * a) / 180 * Mathf.PI)), new Vector3(0, m_IntervalAngle * a, 0));
            m_RectTrans.Add(NewRot);
            IconObjYpos.Add(NewRot.r_Pos.y);
        }

        //設(shè)置位置和旋轉(zhuǎn)
        for (int i = 0; i < IconObj.Count; i++)
        {

            //IconObj[i].transform.localScale = Vector3.one;
            IconObj[i].transform.localPosition = m_RectTrans[i % IconObj.Count].r_Pos;
            IconObj[i].transform.localEulerAngles = m_RectTrans[i % IconObj.Count].r_Eul;
        }
    }

    // Update is called once per frame
    void Update()
    {

        switch (enumRotationState)
        {
            case RotationState.None:
                break;
            case RotationState.Trun:
                TurnChild();
                break;
            case RotationState.Stop:
                StopRotation();
                break;
            case RotationState.Stoped:
                ReSetAllData();
                break;
        }

        if (Input.GetKeyDown(KeyCode.A) && enumRotationState == RotationState.Trun)
        {
            SetStop();
        }
        if (Input.GetKeyDown(KeyCode.S) && enumRotationState == RotationState.None)
        {
            enumRotationState = RotationState.Trun;
        }
    }

    /// <summary>
    /// 旋轉(zhuǎn)
    /// </summary>
    void TurnChild()
    {
        fAngle += fRotationSpeed * Time.deltaTime;
        transform.rotation = Quaternion.Euler(new Vector3(0, fAngle, 0));
        if (IconObj[0].transform.position.x < 0)//<0為順時(shí)針旋轉(zhuǎn)，判斷子物體的x軸世界坐標(biāo)是否小于0啊胶，小于0則進(jìn)入處理甸各，
        {
            GameObject tempGo = IconObj[0];
            tempGo.transform.SetSiblingIndex(transform.childCount - 1);//將此物體的層級(jí)設(shè)置到最后一個(gè)
            IconObj.RemoveAt(0);
            IconObj.Add(tempGo);
        }
    }

    /// <summary>
    /// 設(shè)置停止信號(hào)
    /// </summary>
    void SetStop()
    {
        fAngle = 0;
        fStopTargetAngle = 360 + IconObj[0].transform.localEulerAngles.y;
        Debug.Log(IconObj[0].name);
        enumRotationState = RotationState.Stop;
    }

    /// <summary>
    /// 停止旋轉(zhuǎn)
    /// </summary>
    void StopRotation()
    {
        fAngle += fRotationSpeed * Time.deltaTime;
        fRotationSpeed -= 50 * Time.deltaTime;
        fRotationSpeed = Mathf.Clamp(fRotationSpeed, fSlowDownRotationSpeed, 200);
        if (fAngle >= fStopTargetAngle)
        {
            fAngle = fStopTargetAngle;
            enumRotationState = RotationState.Stoped;
        }
        transform.rotation = Quaternion.Euler(new Vector3(0, fAngle, 0));
        if (IconObj[0].transform.position.x < 0)//<0為順時(shí)針旋轉(zhuǎn)
        {
            GameObject tempGo = IconObj[0];
            tempGo.transform.SetSiblingIndex(transform.childCount - 1);
            IconObj.RemoveAt(0);
            IconObj.Add(tempGo);
        }
    }

    /// <summary>
    /// 重置數(shù)據(jù)
    /// </summary>
    void ReSetAllData()
    {
        fAngle = 0;
        fStopTargetAngle = 0;
        fRotationSpeed = fOriginRotationSpeed;
        enumRotationState = RotationState.None;
    }
}