Blank render windows after updating vtk 8.2 to 9.3

Support
1

Running into an issue with vtkRenderWindow(vtkGenericOpenGLRenderWindow), vtkRenderer(QQuickFramebufferObject::Renderer) after updating our vtk library from 8.2 to 9.3.0. We are using QT 5.15. All the windows are blank (completely black windows), but the interactors still works as expected. I don’t know what changed in vtk to cause this behavior. No vtk errors at all.
I build some vtk examples with no issues. Any suggestions here?

2

Hello,

Are you using QVTKOpenGLNativeWidget?

best,

PC

3

No, there is no reference to QVTKOpenGLNativeWidget in the codebase. We use the vtkGenericOpenGLRenderWindow directly. Is that an issue?

4

Then I recommend using it since you’re using Qt.

5

What is the benefit of using QVTKOpenGLNativeWidget?

6

@Blake_Xi Since you mentioned QQuickFrameBufferObject, it seems that you’re using a custom implementation of VTK in Qt QML. Is that right?

There is a module in the VTK source tree called vtkGUISupportQtQuick that exposes a QQuickVTKItem for use in QML applications. Take a look at the test TestQQuickVTKItem_1 for an example.

7

Thanks everyone for replying. Found another post: Vtk9.x Cannot used in QQuickFramebufferObject::Renderer *createRenderer() but vtk8.x can do . - #13 by NewPony
I tried with the code change and the removal of vtkRenderWindow->SetOffScreenRendering(true); ends up fixing my issue.