简单的老虎机模拟

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在此对老虎机进行相对简单的模拟，只是实现无限循环、缓停、最后归位功能，代码未进行重构，仅此记录一个思路。

代码：

/************************************************************
  FileName: PositionController.cs
  Author:末零       Version :1.0          Date: 2018-7-17
  Description:老虎机模拟
************************************************************/

using System.Collections;
using System.Collections.Generic;

using UnityEngine;

public class PositionController: MonoBehaviour {

    public List<Transform> sprites = new List<Transform>();
    private Transform lastSprite;
    private int indexResetPos;
    private int indexMove;
    public float speed = 0;

    private void Awake()
    {
        GetAll();
    }

	private void Update () 
	{
        StartMave();
        Move();
        ResetPos();
        StopMove();
    }

    /// <summary>
    /// 初始化
    /// </summary>
    private void GetAll()
    {
        for (int i = 0; i < transform.childCount; i++)
        {
            sprites.Add(transform.GetChild(i));
        }

        lastSprite = sprites[sprites.Count - 1];
    }

    /// <summary>
    /// 楷书滚动
    /// </summary>
    private void StartMave()
    {
        if (Input.GetMouseButtonDown(0))
        {
            speed = 10;
        }
    }

    /// <summary>
    /// 滚动
    /// </summary>
    private void Move()
    {
        for (indexMove = 0; indexMove < sprites.Count; indexMove++)
        {
            sprites[indexMove].transform.localPosition = new Vector3(sprites[indexMove].transform.localPosition.x, sprites[indexMove].transform.localPosition.y, sprites[indexMove].transform.localPosition.z) + new Vector3(0, 1, 0)*speed;
        }
    }

    /// <summary>
    /// 重置坐标
    /// </summary>
    private void ResetPos()
    {
        if (sprites[indexResetPos].localPosition.y > 100)
        {
            sprites[indexResetPos].localPosition = new Vector3(lastSprite.localPosition.x, lastSprite.localPosition.y - 100, lastSprite.localPosition.z);
            lastSprite = sprites[indexResetPos];
            indexResetPos++;

            if (indexResetPos >= sprites.Count)
                indexResetPos = 0;
        }
    }

    /// <summary>
    /// 停止滚动
    /// </summary>
    private void StopMove()
    {
        if(Input.GetKeyDown(KeyCode.Space))
        {
            if (speed < 10)
                return;

            StartCoroutine(SlowDown(0.5f));            
        }
    }

    /// <summary>
    /// 减速
    /// </summary>
    /// <param name="del"></param>
    /// <returns></returns>
    IEnumerator SlowDown(float del)
    {
        while (speed > 0)
        {
            yield return new WaitForSeconds(0.1f);
            speed -= del;
            if (speed <= 0)
            {
                StartCoroutine(ReturnZero());
            }           
        }
    }

    /// <summary>
    /// 位置归零
    /// </summary>
    /// <returns></returns>
    IEnumerator ReturnZero()
    {
        float dis = sprites[0].localPosition.y;
        int id = 0;

        for (int j = 1; j < sprites.Count; j++)
        {
            if (Mathf.Abs(sprites[j].localPosition.y) < Mathf.Abs(dis))
            {
                dis = sprites[j].localPosition.y;
                id = j;
            }
        }

        while (Mathf.Abs(sprites[id].localPosition.y) > 0.5f)
        {
            yield return new WaitForSeconds(0.001f);

            for (int k = 0; k < sprites.Count; k++)
            {
                sprites[k].localPosition -= new Vector3(0, dis / 100, 0);
            }
        }

        #region 此处代码不够精简，但上面代码还不够完善，故未删除
        //if (dis < 0)
        //{
        //    while (sprites[id].localPosition.y < 0)
        //    {
        //        yield return new WaitForSeconds(0.001f);

        //        for (int k = 0; k < sprites.Count; k++)
        //        {
        //            sprites[k].localPosition -= new Vector3(0, dis / 100, 0);
        //        }
        //    }
        //}
        //else
        //{
        //    while (sprites[id].localPosition.y > 0)
        //    {
        //        yield return new WaitForSeconds(0.001f);

        //        for (int k = 0; k < sprites.Count; k++)
        //        {
        //            sprites[k].localPosition -= new Vector3(0, dis / 100, 0);
        //        }
        //    }
        //}
        #endregion
    }
}

效果图：