Boundary画线算法，精度导致的问题修复

AIStudio.Wpf.DiagramApp/ViewModels/FlowchartViewModel.cs

@@ -102,6 +102,26 @@ namespace AIStudio.Wpf.Flowchart
             ConnectionViewModel connector10 = new ConnectionViewModel(coend.BottomConnector, end.TopConnector, _service.DrawModeViewModel.LineDrawMode, _service.DrawModeViewModel.LineRouterMode);
             DiagramViewModel.Add(connector10);
 
+            TextDesignerItemViewModel despcription = new TextDesignerItemViewModel()
+            {
+                Name = nameof(despcription),
+                Left = 260,
+                Top = 60,
+                ItemWidth = 300,
+                ItemHeight = 150,
+                Text = @"
+      一个简易的OA审批流程
+      1.主管审批为or审批，任意一个审批即可；
+      2.分管领导为and审批，需要审批两次；
+      3.财务审批为or审批，任意一个审批即可；
+      4.人力审批为or审批，任意一个审批即可；
+注意：为了模拟审批，双击节点可以进行审批；请双击主管审批、分管领导、财务审批、人力审批、进行效果查看。"
+            };
+            despcription.FontViewModel.HorizontalAlignment = HorizontalAlignment.Left;
+            despcription.FontViewModel.VerticalAlignment = VerticalAlignment.Top;
+            despcription.FontViewModel.FontColor = Colors.Blue;
+            DiagramViewModel.Add(despcription);
+
             FlowchartService.InitData(DiagramViewModel.Items.OfType<FlowNode>().ToList(), DiagramViewModel.Items.OfType<ConnectionViewModel>().ToList(), DiagramViewModel, true);
         }