Unity实用小工具---2D贴图之波动效果

最近项目有一个需求: 用图片实现桶中的水涨效果

效果如下：

找不到好的贴图，效果比较丑，请见谅！ 哈哈！

思路： 修改贴图的像素值，具体做法见代码

using DG.Tweening;
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

/// 

/// 利用像素来实现波动效果
/// SetPixels32 function works only on RGBA32, ARGB32, RGB24 and Alpha8 texture formats. For other formats SetPixels is ignored. 
/// The texture also has to have Is Readable flag set in the import settings.
/// 
public class PixelBoDong : MonoBehaviour {

    public RawImage CurRawImage;

    [Header("动画时间")]
    public float AnimTime = 3f;
    [Header("波动底图")]
    public Texture2D ShowTexture;
    [Header("当前波动的起始高度，百分比相对于贴图高度")]
    public float HPrecent;
    [Header("当前波动振幅，相对于贴图高度")]
    public float CurSwingPrecent;
    [Header("波动周期")]
    public float CurSwingCycle;
    [Header("相位值，百分比相对于贴图宽度")]
    public float CurXiangWei;

    // 振幅值
    private int m_CurSwingValue;

    private Color32[] m_PixelsBase;
    private Color32[] m_PixelsDrawLine;

    private Tween m_CurTween;

    private void Awake()
    {
        InitData();
    }

    private void InitData()
    {
        HPrecent = Mathf.Clamp(HPrecent, 0, 1f);
        CurSwingPrecent = Mathf.Clamp(CurSwingPrecent, 0, 1f);
        CurXiangWei = Mathf.Clamp(CurXiangWei, 0, 1f);
    }

    [ContextMenu("Ceshi")]
    public void DrawBoDongAnim()
    {
        if (m_CurTween != null) {
            m_CurTween.Kill();
            m_CurTween = null;
        }

        if (ShowTexture == null) return;

        ShowTexture = GameObject.Instantiate(ShowTexture);

        m_CurSwingValue = Convert.ToInt32(CurSwingPrecent * ShowTexture.height);

        // RawImage 初始化贴图
        CurRawImage.texture = ShowTexture;
        CurRawImage.SetNativeSize();
        // 获取原像素点
        m_PixelsBase = ShowTexture.GetPixels32();
        // 参照高度
        int baseH;
        // 存储像素值
        m_PixelsDrawLine = new Color32[m_PixelsBase.Length];

        float endValue = ShowTexture.width * CurXiangWei;
        m_CurTween = DOTween.To(() => 0, (v) =>
        {
            // 实时刷新参照高度
            baseH = Convert.ToInt32(HPrecent * Mathf.Clamp(v, 0, endValue) / endValue * ShowTexture.width);

            Array.Copy(m_PixelsBase, m_PixelsDrawLine, m_PixelsBase.Length);
            for (int i = 0, len = ShowTexture.width; i float tmpD = m_CurSwingValue * Mathf.Sin(CurSwingCycle * i - v);
                int tmpH = Mathf.Clamp(Convert.ToInt32(tmpD) + baseH, 0, ShowTexture.height - 1);
                for (int y = tmpH, lenY = ShowTexture.height; y new Color32(1, 1, 1, 0);
                }
            }

            ShowTexture.SetPixels32(m_PixelsDrawLine);
            ShowTexture.Apply();

        }, endValue, AnimTime).SetEase(Ease.Linear).SetLoops(-1, LoopType.Incremental);
    }
}

注意事项

• 打开贴图的可读写属性
• 贴图的格式为 RGBA32、ARGB32、 RGB24 and Alpha8
• 需引入DOTween 插件，但最后提供的包中已包含该插件
• 导入下面的包后，打开Main场景，需要自己手动调用动画函数，具体见代码

完整包下载地址

地址：https://pan.baidu.com/s/14le2NLYYcmr8cet-zCff8w

密码：zn0i