虽然不对，但是起码计算思路是对的

Runtime/UILineRenderer.cs

@@ -29,6 +29,8 @@ namespace XericLibrary
         /// </summary>
         public bool center = true;
 
+        public float a = 1;
+        
         /// <summary>
         /// 重写 MaskableGraphic 的方法，用于生成线条的网格
         /// 当 UI 需要重建时会自动调用此方法
@@ -52,7 +54,10 @@ namespace XericLibrary
             {
                 // 使用静态工具方法创建当前点与下一个点之间的线段
                 // 传递当前累积长度和总长度用于UV坐标计算
-                UILineRendererUtils.CreateLineSegment(points[i], points[i+1], thickness, center, rectTransform.sizeDelta, color, vh, currentLength, totalLength);
+                UILineRendererUtils.CreateLineSegment(points[i], points[i+1],
+                    i > 0 ? Mathf.Acos(Vector2.Dot((points[i -1] - points[i]).normalized, (points[i + 1] - points[i]).normalized)) : 0,
+                    i < points.Length-2 ? Mathf.Acos(Vector2.Dot((points[i + 1] - points[i]).normalized,  (points[i + 1] - points[i +2]).normalized)) : 0,
+                    thickness, center, rectTransform.sizeDelta, color, vh, currentLength, totalLength);
 
                 // 更新累积长度
                 currentLength += Vector2.Distance(points[i], points[i+1]);

Runtime/UILineRendererUtils.cs

@@ -1,5 +1,6 @@
 using UnityEngine;
 using UnityEngine.UI;
+using XericLibrary.Runtime.MacroLibrary;
 
 namespace XericLibrary
 {
@@ -35,6 +36,8 @@ namespace XericLibrary
         /// </summary>
         /// <param name="point1">线段的起点</param>
         /// <param name="point2">线段的终点</param>
+        /// <param name="angle0">起点到终点与终点到下一点</param>
+        /// <param name="angle3">起点到终点与终点到下一点</param>
         /// <param name="thickness">线条的厚度</param>
         /// <param name="center">是否居中显示</param>
         /// <param name="rectSize">矩形变换的尺寸</param>
@@ -42,49 +45,71 @@ namespace XericLibrary
         /// <param name="vh">用于添加顶点的 VertexHelper 对象</param>
         /// <param name="currentLength">当前线段起点在线路中的累积长度</param>
         /// <param name="totalLength">线路的总长度</param>
-        public static void CreateLineSegment(Vector3 point1, Vector3 point2, float thickness, bool center, Vector2 rectSize, Color color, VertexHelper vh, float currentLength, float totalLength)
+        public static void CreateLineSegment(Vector2 point1, Vector2 point2, float angle0, float angle3, float thickness, bool center, Vector2 rectSize, Color color, VertexHelper vh, float currentLength, float totalLength)
         {
             // 计算偏移量：如果需要居中显示，则偏移到组件中心
-            Vector3 offset = center ? (rectSize / 2) : Vector2.zero;
+            Vector2 offset = center ? (rectSize / 2) : Vector2.zero;
 
             // 创建顶点模板，设置颜色为组件的当前颜色
             UIVertex vertex = UIVertex.simpleVert;
             vertex.color = color;
 
+            var vector = point2 - point1;
+            var vectorDistance = vector.magnitude;
+
+            // 距离过小时不绘制
+            if (vectorDistance <= float.Epsilon)
+                return;
+            // 线段的法线和副法线
+            var vectorNormal = vector / vectorDistance;
+            var vectorSubtangent = Vector2.Perpendicular(vectorNormal);
             // 计算线段长度
             float segmentLength = Vector2.Distance(point1, point2);
-            
+            // 线段单侧宽度
+            var width = thickness / 2;
+            //顶点偏移量
+            var pointOffset1 = angle0 == 0 ? 0 : width / Mathf.Sin(angle0 / 2);
+            var pointOffset2 = angle3 == 0 ? 0 : width / Mathf.Sin(angle3 / 2);
+            Debug.Log($"{pointOffset1} , {pointOffset2}");
             // 计算起点和终点的UV坐标Y值
             float startUVY = totalLength > 0 ? currentLength / totalLength : 0f;
             float endUVY = totalLength > 0 ? (currentLength + segmentLength) / totalLength : 0f;
-
+            
             // 计算起点的旋转角度，使线条垂直于线段方向
-            Quaternion point1Rotation = Quaternion.Euler(0, 0, RotatePointTowards(point1, point2) + 90);
+            // Quaternion point1Rotation = Quaternion.Euler(0, 0, RotatePointTowards(point1, point2) + 90);
             
             // 添加起点的左侧顶点
-            vertex.position = point1Rotation * new Vector3(-thickness / 2, 0);
+            // vertex.position = point1Rotation * new Vector3(-thickness / 2, 0);
-            vertex.position += point1 - offset;
+            vertex.position = (Vector3)(point1 + 
+                                         vectorSubtangent * -width + 
+                                         vectorNormal * pointOffset1) - (Vector3)offset;
             vertex.uv0 = new Vector2(0f, startUVY); // 左侧顶点的UV
             vh.AddVert(vertex);
             
             // 添加起点的右侧顶点
-            vertex.position = point1Rotation * new Vector3(thickness / 2, 0);
+            // vertex.position = point1Rotation * new Vector3(thickness / 2, 0);
-            vertex.position += point1 - offset;
+            vertex.position = (Vector3)(point1 + 
+                                        vectorSubtangent * width + 
+                                        vectorNormal * pointOffset1) - (Vector3)offset;
             vertex.uv0 = new Vector2(1f, startUVY); // 右侧顶点的UV
             vh.AddVert(vertex);
 
             // 计算终点的旋转角度，使线条垂直于线段方向
-            Quaternion point2Rotation = Quaternion.Euler(0, 0, RotatePointTowards(point2, point1) - 90);
+            //Quaternion point2Rotation = Quaternion.Euler(0, 0, RotatePointTowards(point2, point1) - 90);
             
             // 添加终点的左侧顶点
-            vertex.position = point2Rotation * new Vector3(-thickness / 2, 0);
+            //vertex.position = point2Rotation * new Vector3(-thickness / 2, 0);
-            vertex.position += point2 - offset;
+            vertex.position = (Vector3)(point2 + 
+                                        vectorSubtangent * -width + 
+                                        vectorNormal * pointOffset2) - (Vector3)offset;
             vertex.uv0 = new Vector2(0f, endUVY); // 左侧顶点的UV
             vh.AddVert(vertex);
             
             // 添加终点的右侧顶点
-            vertex.position = point2Rotation * new Vector3(thickness / 2, 0);
+            //vertex.position = point2Rotation * new Vector3(thickness / 2, 0);
-            vertex.position += point2 - offset;
+            vertex.position = (Vector3)(point2 + 
+                                        vectorSubtangent * width + 
+                                        vectorNormal * pointOffset2) - (Vector3)offset;
             vertex.uv0 = new Vector2(1f, endUVY); // 右侧顶点的UV
             vh.AddVert(vertex);