Qt VTK learning record

1. VTK How to embed the vtk export directly into the qt window without using qvtkwidget
Code 1:

vtkSmartPointer<vtkRenderWindow> renderWindow = ui.qvtkWidget->GetRenderWindow();//vtkSmartPointer<vtkRenderWindow>::New();

Code 2

QWidget* widget;
vtkRenderWindow* renderWindow = .....:New();
renderWindow->SetParentId((HWND)widget->winid());

2. Detailed explanation of VTK vtkRenderWindow and vtkRenderWindowInteractor
3. VTK vtkpolydata graphics coloring
4. VTK SetInputData() and SetInputConnection() replace SetInput()
5. VTK graphics processing color mapping
6. VTK set gradient background color effect