更改文件架构

Packages/Common~/Scripts/UX/VisualElement/TexturedElement.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+namespace BITKit.UX
+{
+    public class TexturedElement : VisualElement
+    {
+        static readonly Vertex[] k_Vertices = new Vertex[4];
+        static readonly ushort[] k_Indices = { 0, 1, 2, 2, 3, 0 };
+
+        static TexturedElement()
+        {
+            k_Vertices[0].tint = Color.white;
+            k_Vertices[1].tint = Color.white;
+            k_Vertices[2].tint = Color.white;
+            k_Vertices[3].tint = Color.white;
+        }
+
+        public TexturedElement()
+        {
+            generateVisualContent += OnGenerateVisualContent;
+#if UNITY_EDITOR
+            m_Texture = AssetDatabase.LoadAssetAtPath<Texture2D>("Assets/tex.png");
+#endif
+        }
+
+        Texture2D m_Texture;
+
+        void OnGenerateVisualContent(MeshGenerationContext mgc)
+        {
+            Rect r = contentRect;
+            if (r.width < 0.01f || r.height < 0.01f)
+                return; // Skip rendering when too small.
+
+            float left = 0;
+            float right = r.width;
+            float top = 0;
+            float bottom = r.height;
+
+            k_Vertices[0].position = new Vector3(left, bottom, Vertex.nearZ);
+            k_Vertices[1].position = new Vector3(left, top, Vertex.nearZ);
+            k_Vertices[2].position = new Vector3(right, top, Vertex.nearZ);
+            k_Vertices[3].position = new Vector3(right, bottom, Vertex.nearZ);
+
+            MeshWriteData mwd = mgc.Allocate(k_Vertices.Length, k_Indices.Length, m_Texture);
+
+            // Since the texture may be stored in an atlas, the UV coordinates need to be
+            // adjusted. Simply rescale them in the provided uvRegion.
+            Rect uvRegion = mwd.uvRegion;
+            k_Vertices[0].uv = new Vector2(0, 0) * uvRegion.size + uvRegion.min;
+            k_Vertices[1].uv = new Vector2(0, 1) * uvRegion.size + uvRegion.min;
+            k_Vertices[2].uv = new Vector2(1, 1) * uvRegion.size + uvRegion.min;
+            k_Vertices[3].uv = new Vector2(1, 0) * uvRegion.size + uvRegion.min;
+
+            mwd.SetAllVertices(k_Vertices);
+            mwd.SetAllIndices(k_Indices);
+        }
+    }
+
+}

Packages/Common~/Scripts/UX/VisualElement/TexturedElement.cs.meta

@@ -0,0 +1,11 @@
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