void ViewWindow::OnGen2dCurve(){// Clear All_ctrlUi->listView->Clear();try{//构造一个线段GC_MakeSegment Segment1(gp_Pnt(20, 0, 0), gp_Pnt(30, 0, 0));//根据线段构造一个边BRepBuilderAPI_MakeEdge anEdge(Segment1.Valu