The QLayer in Qt3D has an error, may be a bug

wang_qt

Please look at this picture. I have tried many times, but still cannot solve this problem.

VRonin

Are you rendering from a secondary thread?

wang_qt

Hi VRonin,
Thanks for your reply. I didn't create any thread in my program.

The following is the framegraph I made to show 4 viewports,
//Four viewports
//Framegraph top node
m_pSurfaceSelectorFourViewPorts = new Qt3DRender::QRenderSurfaceSelector();
m_pSurfaceSelectorFourViewPorts->setSurface(this);

//Clear Buffer
auto pClearBuffer = new  Qt3DRender::QClearBuffers(m_pSurfaceSelectorFourViewPorts);
auto PNoDraw = new Qt3DRender::QNoDraw(pClearBuffer);
pClearBuffer->setBuffers(Qt3DRender::QClearBuffers::ColorDepthBuffer);
pClearBuffer->setClearColor(QColor(95,105,115));//change the background color

//View LeftUp
auto pViewPortLeftUp = new Qt3DRender::QViewport(m_pSurfaceSelectorFourViewPorts);
auto pCameraSelectorLeftUp = new Qt3DRender::QCameraSelector(pViewPortLeftUp);
pViewPortLeftUp->setNormalizedRect(QRectF(0.0f,0.0f,0.5f,0.5f));
pCameraSelectorLeftUp->setCamera(m_pCameraLeftUp);


//View RightUp, front view 
auto pViewPortRightUp = new Qt3DRender::QViewport(m_pSurfaceSelectorFourViewPorts);
auto pCameraSelectorRightUp = new Qt3DRender::QCameraSelector(pViewPortRightUp);
pViewPortRightUp->setNormalizedRect(QRectF(0.5f,0.0f,0.5f,0.5f));
pCameraSelectorRightUp->setCamera(m_pCameraRightUp);


	//View indicator viewport
    auto pViewPort_FourViewPorts_RightUpViewPort_ViewIndicator = new Qt3DRender::QViewport(m_pSurfaceSelectorFourViewPorts);
	auto pCameraSelector_FourViewPorts_RightUpViewPort_ViewIndicator = new Qt3DRender::QCameraSelector(pViewPort_FourViewPorts_RightUpViewPort_ViewIndicator);
    **auto pLayerFilter_FourViewPorts_RightUpViewPort_ViewIndicator = new Qt3DRender::QLayerFilter(pCameraSelector_FourViewPorts_RightUpViewPort_ViewIndicator);**
    pViewPort_FourViewPorts_RightUpViewPort_ViewIndicator->setNormalizedRect(QRectF(0.0f, 0.0f, 0.1f, 0.1f));
	**pCameraSelector_FourViewPorts_RightUpViewPort_ViewIndicator->setCamera(m_pCameraRightUp);
    pLayerFilter_FourViewPorts_RightUpViewPort_ViewIndicator->addLayer(pLayerRightView);**

//View LeftBottom
auto pViewPortLeftBottom = new Qt3DRender::QViewport(m_pSurfaceSelectorFourViewPorts);
auto pCameraSelectorLeftBottom = new Qt3DRender::QCameraSelector(pViewPortLeftBottom);
pViewPortLeftBottom->setNormalizedRect(QRectF(0.0f,0.5f,0.5f,0.5f));
pCameraSelectorLeftBottom->setCamera(m_pCameraLeftBottom);

//View RightBottom
auto pViewPortRightBottom = new Qt3DRender::QViewport(m_pSurfaceSelectorFourViewPorts);
auto pCameraSelectorRightBottom = new Qt3DRender::QCameraSelector(pViewPortRightBottom);
pViewPortRightBottom->setNormalizedRect(QRectF(0.5f,0.5f,0.5f,0.5f));
pCameraSelectorRightBottom->setCamera(m_pCameraRightBottom);

If I comment the two lines in bold, there will be no problem.

wang_qt

Hi VRonin,
My reply is considered as spam, so I put it in my google drive
https://drive.google.com/file/d/1USmQWEV-vnSDOezq1aTuIKmApOZJfPja/view?usp=sharing

Thanks for your help.

If you need, I can give you my source code.