QNoPicking Class

When a Qt3DRender::QNoPicking node is present in a FrameGraph branch, this prevents the render aspect from performing picking selection for the given branch.

This class was introduced in Qt 5.14.

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Publié le 26 janvier 2024 - Mis à jour le 26 janvier 2024

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QNoPicking Class▲

Header: QNoPicking
Since: Qt 5.14
CMake:

find_package(Qt6 REQUIRED COMPONENTS 3drender)

target_link_libraries(mytarget PRIVATE Qt6::3drender)
qmake: QT += 3drender
Inherited By:
Instantiated By: qml-qt3d-render-nopicking.xml
Inherits: Qt3DRender::QFrameGraphNode

Detailed Description▲

When disabled, a Qt3DRender::QNoPicking node won't prevent picking from being performed. Toggling the enabled property is therefore a way to make a Qt3DRender::QNoPicking active or inactive.

When using multiple subviewports in the FrameGraph, QNoPicking can be useful to prevent picking conflicts between overlapping viewports or non visual ones. It can also be used as an optimization to prevent unnecessary work for hidden viewports or for sections of the scenes which don't require any picking.

Sélectionnez

Qt3DRender::QViewport *viewport = new Qt3DRender::QViewport();
Qt3DRender::QCameraSelector *cameraSelector = new Qt3DRender::QCameraSelector(viewport);
Qt3DRender::QNoPicking *noPicking = new Qt3DRender::QNoPicking(cameraSelector);

Qt3DRender::QClearBuffers *clearBuffers = new Qt3DRender::QClearBuffers(noPicking);
clearBuffers-&gt;setBuffers(Qt3DRender::QClearBuffers::ColorDepthBuffer);

Qt3DRender::QRenderPassFilter *mainPass = new Qt3DRender::QRenderPassFilter(cameraSelector);
....
Qt3DRender::QRenderPassFilter *previewPass = new Qt3DRender::QRenderPassFilter(cameraSelector);
....