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2025-08-04 cdbab438c6398d0b4e58be8425b49891f653be15

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using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
 
[DisallowMultipleComponent]
[ExecuteAlways]
 
public class SmoothMask:UIBehaviour,ICanvasRaycastFilter {
 
    [Range(0,1)]
    [SerializeField]
    private float m_Horizontal = 0f;
    public float horizontal { get { return m_Horizontal; } }
 
    [Range(0,1)]
    [SerializeField]
    private float m_Vertical = 0f;
    public float vertical { get { return m_Vertical; } }
 
    [SerializeField]
    private Material[] m_ImageMaterials;
    public Material[] imageMaterials { get { return m_ImageMaterials; } }
 
    [SerializeField]
    private Material[] m_TextMaterials;
    public Material[] textMaterials { get { return m_TextMaterials; } }
 
    [SerializeField]
    private CanvasScaler m_CanvasScaler;
    public CanvasScaler canvasScaler {
        get {
            return m_CanvasScaler ?? (m_CanvasScaler = GetComponentInParent<CanvasScaler>());
        }
    }
 
    public RectTransform rectTransform {
        get {
            return this.transform as RectTransform;
        }
    }
    private Vector2 leftBottom;
    private Vector2 rightTop;
 
    public bool IsRaycastLocationValid(Vector2 sp,Camera eventCamera) {
        return RectTransformUtility.RectangleContainsScreenPoint(rectTransform,sp,eventCamera);
    }
 
    void LateUpdate() {
        UpdateChildMaterialSmoothMask();
    }
 
    [ContextMenu("SetMaterial")]
    public void UpdateChildrenMaterial() {
        SetChildrenImageMaterial(this.transform);
        SetChildrenTextMaterial(this.transform);
    }
 
    private void SetChildrenImageMaterial(Transform _transform) {
        Image[] images = _transform.GetComponentsInChildren<Image>(true);
        ImageEx[] imageexs = _transform.GetComponentsInChildren<ImageEx>(true);
 
        if (null != images)
        {
            for(int i = 0;i < images.Length;i++) {
                images[i].material = imageMaterials.Length > 0? imageMaterials[0] : null;
            }
        }
 
        if (null!= imageexs)
        {
            for(int i = 0;i < imageexs.Length;i++) {
                imageexs[i].material = imageMaterials.Length > 0? imageMaterials[0] : null;
            }
        }
    }
 
    private void SetChildrenTextMaterial(Transform _parent) {
        Text[] texts = _parent.GetComponentsInChildren<Text>(true);
        if(texts!= null) {
            for(int i = 0;i < texts.Length;i++) {
                texts[i].material = textMaterials.Length > 0? textMaterials[0] : null;
            }
        }
    }
 
    private void UpdateChildMaterialSmoothMask() {
        var scaleX = canvasScaler.transform.localScale.x;
        var scaleY = canvasScaler.transform.localScale.y;
 
        Vector3[] corners = new Vector3[4];
        rectTransform.GetWorldCorners(corners);
 
        leftBottom = new Vector2(corners[0].x, corners[0].y);
        rightTop = new Vector2(corners[2].x, corners[2].y);
 
        if(imageMaterials != null) {
            for(int i = 0;i < imageMaterials.Length;i++) {
                SetSmoothMask(imageMaterials[i],leftBottom,rightTop,new Vector2(horizontal,vertical));
            }
        }
 
        if(textMaterials != null) {
            for(int i = 0;i < textMaterials.Length;i++) {
                SetSmoothMask(textMaterials[i],leftBottom,rightTop,new Vector2(horizontal,vertical));
            }
        }
    }
 
#if UNITY_EDITOR
    void OnDrawGizmos() {
        Vector3[] corners = new Vector3[4];
        rectTransform.GetWorldCorners(corners);
        
        Gizmos.color = Color.red; // 设置线框颜色
        // 绘制矩形边界
        Gizmos.DrawLine(corners[0], corners[1]); // 左下→左上
        Gizmos.DrawLine(corners[1], corners[2]); // 左上→右上
        Gizmos.DrawLine(corners[2], corners[3]); // 右上→右下
        Gizmos.DrawLine(corners[3], corners[0]); // 右下→左下
    }
#endif
 
    void SetSmoothMask(Material material,Vector2 leftBottom,Vector2 rightTop,Vector2 smoothRect) {
 
        Image[] images = GetComponentsInChildren<Image>(true);
        ImageEx[] imageexs = GetComponentsInChildren<ImageEx>(true);
        Text[] texts = GetComponentsInChildren<Text>(true);
 
        if (null != images)
        {
            foreach (var graphic in images)
            {
                graphic.material.SetVector("_LeftBottom",leftBottom);
                graphic.material.SetVector("_RightTop",rightTop);
                graphic.material.SetVector("_SmoothRect",smoothRect);
            }
        }
 
        if (null != imageexs)
        {
            foreach (var graphic in imageexs)
            {
                graphic.material.SetVector("_LeftBottom",leftBottom);
                graphic.material.SetVector("_RightTop",rightTop);
                graphic.material.SetVector("_SmoothRect",smoothRect);
            }
        }
 
        if (null != texts)
        {
            foreach (var graphic in texts)
            {
                graphic.material.SetVector("_LeftBottom",leftBottom);
                graphic.material.SetVector("_RightTop",rightTop);
                graphic.material.SetVector("_SmoothRect",smoothRect);
            }
        }
    }
}