QVTKWidget deprecated (in VTK >= 8.2 at least)

[kunaltyagi]

QVTKWidget is used in apps (pcd_video_player, manual_registration, render_window, among others) and is deprecated at least on VTK v8.2

Rendering background used is OpenGL2

[lesterlo]

I receive this warning after I change qvtkWidget to QVTKOpenGLNativeWidget on my program. This error appears on my mac and the program is not functional.

Any suggestions to solve this question?

Possible solution

Use vtkGenericOpenGLRenderWindow with QVTKOpenGLNativeWidget

and

setup the surfaceFormat QSurfaceFormat::setDefaultFormat(QVTKOpenGLWidget::defaultFormat());

Error

# Error

QVTKOpenGLNativeWidget requires a `vtkGenericOpenGLRenderWindow`. ` vtkCocoaRenderWindow ` is not supported.


ERROR: In /tmp/vtk-20200406-71083-llkp3g/VTK-8.2.0/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx, line 754
vtkGenericOpenGLRenderWindow (0x7fa4b400d800): Unable to find a valid OpenGL 3.2 or later implementation. Please update your video card driver to the latest version. If you are using Mesa please make sure you have version 11.2 or later and make sure your driver in Mesa supports OpenGL 3.2 such as llvmpipe or openswr. If you are on windows and using Microsoft remote desktop note that it only supports OpenGL 3.2 with nvidia quadro cards. You can use other remoting software such as nomachine to avoid this issue.

[kunaltyagi]

This error appears on my mac and the program is not functional.

Mac isn't supported because Apple has deprecated OpenGL

[lesterlo]

@kunaltyagi

Is there has any solution to prevent this error? Or I need to write 2 sets of Qt GUI Code, One for Mac and One for Linux?

Also, Could I use dear ImGUI with PCL?

Many Thanks!

[kunaltyagi]

We don't have enough hands on deck with experience in visualization. As a result, we haven't found a solution or a workaround.

I think using MoltenVK and GLOVE together should make it work, but I never investigated it deeply.

Regarding ImGUI, I'm sure you can use it with PCL. You can either create a new binding or use an existing one:

• https://github.com/lucasw/imgui_ros
• https://github.com/izumin5210/CiPointCloudViewer
• https://github.com/izumin5210/Cinder-PCL (if you use cinder)

[larshg]

Should have been solved by #4262.

[themightyoarfish]

Not solved with current master and vtk 9.0.3 on macos.

[themightyoarfish]

Is it definitive that visualization will not work on macos with VTK > 8?

[larshg]

Is it definitive that visualization will not work on macos with VTK > 8?

Can you elaborate a bit whats not working? The CI builds with vtk 9.

[themightyoarfish]

I mean using the render window returned by PCLVisualizer::getRenderWindow() as the target for a Qt widget that inherits from QVTKOpenGLNativeWidget. When I call setRenderWindow() with the PCL visualizer window, I get the

QVTKOpenGLNativeWidget requires a `vtkGenericOpenGLRenderWindow`. ` vtkCocoaRenderWindow ` is not supported.

warning/error and the PCL visualizer window pops up separately, instead of appearing inside the Qt widget.

[themightyoarfish]

Something like this, which used to work with QVTKWidget from vtk 8.2

class PointCloudWidget : public QVTKOpenGLNativeWidget {
public:
  PointCloudWidget(QWidget* parent) : QVTKOpenGLNativeWidget(parent) {
	this->setRenderWindow(m_visualizer->getRenderWindow());
}
};