修正夹点显示的回归错误

src/ApplicationServices/Application.ts

@@ -59,7 +59,7 @@ export class ApplicationService
         let gt = new Gesture(this.Editor);
         RegisterGesture(gt);
 
-
+        //夹点显示
         let selectCtrl = this.Editor.SelectCtrl;
         end(selectCtrl, selectCtrl.AddSelect, (ss: SelectSetBase) =>
         {
@@ -73,6 +73,10 @@ export class ApplicationService
                 this.Viewer.GripScene.Remove(obj);
             this.Viewer.UpdateRender();
         });
+        end(selectCtrl, selectCtrl.Cancel, () =>
+        {
+            this.Viewer.GripScene.Clear();
+        });
 
         begin(commandMachine, commandMachine.CommandStart, () =>
         {