diff --git a/AIStudio.Wpf.DiagramDesigner/Helpers/DrawingHelper.cs b/AIStudio.Wpf.DiagramDesigner/Helpers/DrawingHelper.cs
index 09ad2e0..b468584 100644
--- a/AIStudio.Wpf.DiagramDesigner/Helpers/DrawingHelper.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Helpers/DrawingHelper.cs
@@ -53,5 +53,17 @@ namespace AIStudio.Wpf.DiagramDesigner
             return endPoint;
         }
 
+        /// <summary>
+        /// 通过三角函数求终点坐标
+        /// </summary>
+        /// <param name="angle">角度</param>
+        /// <param name="startPoint">起点</param>
+        /// <param name="distance">距离</param>
+        /// <returns>终点坐标</returns>
+        public static Point GetEndPointByDirection(Point startPoint, double direction, double distance)
+        {
+            return GetEndPointByTrigonometric(startPoint, direction - 90, distance);
+        }
+
     }
 }