Unity Image(RawImage) 实现按轴心放大缩小,序列化存储轴心信息,实现编译器窗口保存轴心

工作时分配给我的要实现的功能,写的时候遇到挺多的坑的,在此记录一下

效果

放大缩小的效果
请添加图片描述

2.编译器扩展窗口记录请添加图片描述

实现点

1.Json序列化存储图片轴心位置, 放大倍率,放大所需要的事件
2.用了编译器扩展工具便于保存轴心信息

坑点

1.Image和RawImage的坐标都是以轴心位置计算的,更改轴心就需要重定位
2.确保画布的分辨率和测试的屏幕分辨率一致
3.计算轴心偏移和别忘记在乘以自己的放大倍率

工具的使用

1.打开WSC/保存图片轴心工具,在Image位置挂在需要保存轴心的图像,输出name作为key,并在Scene窗口中直接拖动轴心确定位置(不建议在Inspector中手动输入轴心修改,这样会让图像重定位)
请添加图片描述
请添加图片描述

2.程序调用

无论是简化key传入还是传入轴心对象的方式都需要传入要放大的Image

请添加图片描述

请添加图片描述

代码

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

namespace YBZ
{
    
    
    public class ControlImage : MonoBehaviour
    {
    
       
        
        // 需要控制的图片
        [Header("2D的图像,如果是视屏改为RawImage进行推流即可")]
        public Image image;

        // Start is called before the first frame update
        void Start()
        {
    
       
            if(image == null){
    
    
                
                if(!TryGetComponent<Image>(out image)){
    
    
                    gameObject.AddComponent<Image>();
                    image = GetComponent<Image>();
                }
            }
            rect = image.GetComponent<RectTransform>();

            // 先读取json中的文件
            Utility.Instance.ReadData();

            StartCoroutine(five());

        }

        IEnumerator five(){
    
    
            Utility.Instance.ImageZoom(image, Utility.Instance.dict["1"]);
            yield return new WaitForSeconds(1);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["2"]);
            yield return new WaitForSeconds(1.01f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["3"]);
            yield return new WaitForSeconds(1.01f);
            
            Utility.Instance.ImageZoom(image, Utility.Instance.dict["4"]);
            yield return new WaitForSeconds(1.01f);
            
            Utility.Instance.ImageZoom(image, Utility.Instance.dict["5"]);
            yield return new WaitForSeconds(3.01f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["6"]);
            yield return new WaitForSeconds(1.01f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["7"]);
            yield return new WaitForSeconds(1.51f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["8"]);
            yield return new WaitForSeconds(1.51f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["9"]);
            yield return new WaitForSeconds(2.01f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["10"]);
            yield return new WaitForSeconds(2.01f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["11"]);
            yield return new WaitForSeconds(2.01f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["12"]);
            yield return new WaitForSeconds(2.01f);

            Utility.Instance.ImageZoom(image, Utility.Instance.dict["RESET"]);
        }

        // 图片的放大接口
        public void ZoomEvent(Image image, string key){
    
    
            Utility.Instance.ZoomPivot(image, key);
        }

        
    }


    // 单例模式
    // 命名冲突时,请指定命名空间
    // 使用前一定要读取数据!
    public class Utility{
    
    

        public static Utility instance;

        public static Utility Instance {
    
     
            get{
    
    
                if(instance == null) instance = new Utility();
                return instance;
            }
        }



        // 放大点位置的字典
        public Dictionary<String, ZoomPoint> dict = new Dictionary<string, ZoomPoint>();
        
        //json文件的位置,这个位置默认是在SteamingAssets下的
        private string jsonFileName ="/2DPivots.json";

        private string filePath =""; // "StreamingAssets/2Dpivots"
        public void SetFilePath(string value) => filePath = value;

        // 写入数据
        public void WriteDataTest(){
    
    
            Data data = new Data();
            data.zoomPoints = new List<ZoomPoint>();

            ZoomPoint point1 = new ZoomPoint
            {
    
    
                name = "1",
                pivot = new Vector2(0.75f,0.75f)
            };
            ZoomPoint point2 = new ZoomPoint
            {
    
    
                name = "2",
                pivot = new Vector2(0.5f,0.5f)
                
            };

            data.zoomPoints[0] = point1;
            data.zoomPoints[1] = point2;

            string js = JsonUtility.ToJson(data);

            // 获取项目路径
            string fileUrl;
            if(filePath == ""){
    
    
                fileUrl = Application.streamingAssetsPath + jsonFileName;
            }else{
    
    
                fileUrl = filePath;
            }
            
            using(StreamWriter sw  = new StreamWriter(fileUrl))
            {
    
       
                sw.WriteLine(js); //保存数据
                sw.Close(); 
                sw.Dispose();
            }
        }  


        public void WriteData(ZoomPoint zp){
    
    
            Data data = ReadData();
            
            if(data != null && data.zoomPoints != null){
    
    
                foreach(var temp in data.zoomPoints){
    
    
                    if(temp.name == zp.name){
    
    
                        Debug.LogError("轴心名字重复 !(⊙_⊙)?");
                        return;
                    }
                }
            }
            
            data.zoomPoints.Add(zp);

            string js = JsonUtility.ToJson(data);

            // 获取项目路径
            string fileUrl;
            if(filePath == ""){
    
    
                fileUrl = Application.streamingAssetsPath + jsonFileName;
            }else{
    
    
                fileUrl = filePath;
            }

            using(StreamWriter sw  = new StreamWriter(fileUrl))
            {
    
       
                sw.WriteLine(js); //保存数据
                sw.Close(); // 关闭文档
                sw.Dispose();
            }
            Debug.Log("保存成功(*^▽^*)");
        }

        /// <summary>
        /// 读取数据,在外界不需要接受Data只需要调用即可,返回的Data仅供我自己编写其他程序耦合使用,忽略返回值
        /// 请在调用dict 前一定要先调用ReadData函数
        /// </summary>
        public Data ReadData(){
    
    
            // 获取项目路径
            string fileUrl;
            if(filePath == ""){
    
    
                fileUrl = Application.streamingAssetsPath + jsonFileName;
            }else{
    
    
                fileUrl = filePath;
            }
            
            //读取文件
            string readDate;
            using (StreamReader sr = File.OpenText(fileUrl)){
    
    
                readDate = sr.ReadLine();
                sr.Close();
            }

            Data data = JsonUtility.FromJson<Data>(readDate);

            // 分配内存
            if(data == null ){
    
    
                data = new Data();
                data.zoomPoints = new List<ZoomPoint>();
                return data;
            }

            // 数据保存到字典里
            foreach(ZoomPoint zp  in data.zoomPoints){
    
    
                dict.TryAdd(zp.name, zp);
            }
            return data;
        }

        /// <summary>
        /// 按点放大轴心,无法捕获动画一定确保放大的动画之间不会冲突,简化了ImageZoom的调用
        /// </summary>
        /// <param name="zoomObj">被放大图像</param>
        /// <param name="key">轴心的名字</param>
        public void ZoomPivot(Image zoomObj, string key){
    
    
            ImageZoom(zoomObj, dict[key]);
        }

        /// <summary>
        /// 按倍率,轴心定位的方法放大图形,如果目标的轴心不在中心,会在设定完轴心后将目标移动到轴心,
        /// 需要注意的事,图片的坐标位置是以轴心位置为确定的,也因此放大缩小不改变图像的世界坐标
        /// </summary>
        /// <param name="zoomObj">需要方法的图像</param>
        /// <param name="x">轴心的x</param>
        /// <param name="y">轴心的y</param>
        /// <param name="zoomMagnification">放大倍率</param>
        /// 
        public void ImageZoom(Image zoomObj , ZoomPoint zp){
    
    
            float x = zp.pivot.x;
            float y = zp.pivot.y;
            float zoomMagnification = zp.zoomMagnification;
            float time = zp.time;

            // 当前和目标按图轴心位置 
            Vector3 currentPivotPostition = new Vector3(zoomObj.rectTransform.rect.width * zoomObj.rectTransform.pivot.x, zoomObj.rectTransform.rect.height * zoomObj.rectTransform.pivot.y) * zoomMagnification;
            Vector3 targetPivotPosition = new Vector3(zoomObj.rectTransform.rect.width * x, zoomObj.rectTransform.rect.height * y) * zoomMagnification;

            zoomObj.rectTransform.pivot = new Vector2(x, y); // 设定轴心
            zoomObj.transform.position += targetPivotPosition - currentPivotPostition; // 重定位

            Vector3 targetPostion = zoomObj.transform.position + currentPivotPostition - targetPivotPosition;

            //位移
            Translate(zoomObj, targetPostion, time);

            // 2023.7.30 经过测试,缩放仍然是更具初始轴心,能够达到理想效果不需要将LocalScale恢复为1
            // 为了结算范围失控的问题,需要将localScale恢复为1,再放大为需要的大小
            // zoomObj.rectTransform.localScale = new Vector3(1,1,1);
            Vector3 targetScale = new Vector3(zoomMagnification, zoomMagnification, zoomMagnification);
            zoomObj.rectTransform.DOScale(targetScale, time);

        }

        // 该方法主要是需要将目标点移动到坐标终点
        public void Translate(Image zoomObj, Vector3 target, float time){
    
    
            // 计算当前轴心和新轴心之间的位置
            Vector3 current = zoomObj.transform.position;
            // 移动
            zoomObj.transform.DOMove(target, time);
        }
    }
    

    // 数据存储接受类
    [Serializable]
    public class Data{
    
    
    	// 不能用字典直接存储,可以采用数据列表这样的连续空间
        // public ZoomPoint[] zoomPoints;
        // public Dictionary<string, ZoomPoint> zoomPoints;
        public List<ZoomPoint> zoomPoints;
    }


    // 可序列化
    [Serializable]
    public class ZoomPoint
    {
    
    
        // 点名称, 将作为Key被字典存储
        public string name;

        // 轴心X坐标
        public Vector2 pivot = Vector2.one / 2;

        // 放大倍率,小于1是为缩小倍率,小于0是取绝对值,不允许原点对称缩放,需要保证计算轴心逻辑正确
        // 默认设为1.5f 放大倍率
        public float zoomMagnification = 5f;

        // 改变的需要的时间,默认设为1f
        public float time = 1.0f;

        public override string ToString()
        {
    
    
            return $"name = {
      
      this.name}, pivot = ({
      
      pivot.ToString()}), zoomMagnification = {
      
      this.zoomMagnification}, time = {
      
      this.time}";
        }
    }

	
    // 实现编译器窗口扩展
    public class Editor :  ScriptableWizard 
    {
    
    
        //  文件路径
        public string filePath = Application.streamingAssetsPath + "/2DPivots.json";

        [SerializeField]
        public Image image;

        // 作为轴心点保存定位的Key
        new public string name;

        // 轴心
        public Vector2 pivot;

        // 放大倍率
        public float zoomMagnification = 5f;

        // 动画时间
        public float time = 1.0f;


        [MenuItem("WSC/保存图片轴心")]
        public static void CreateWizard() {
    
    
            ScriptableWizard.DisplayWizard<Editor>("Image zoom info save","退出", "保存当前轴心");
        }

        private int count = 1;
        void OnWizardCreate()
        {
    
    
            Utility.Instance.SetFilePath(filePath);
            Utility.Instance.ReadData();
            Debug.Log("轴心更新完毕(^-^)V");
        }

        void OnWizardOtherButton(){
    
    
            pivot = image.rectTransform.pivot;
            if (name == null) 
                name = (count++).ToString();

            ZoomPoint zp = new ZoomPoint
            {
    
    
                name = this.name,
                pivot = pivot,
                zoomMagnification = this.zoomMagnification,
                time = this.time
            };

            // reset image pivot
            Utility.Instance.WriteData(zp);
        }
    }
    

}


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转载自blog.csdn.net/blastospore/article/details/132101299