QNoDraw Classclass Qt3DRender::QNoDraw
|qmake:||QT += 3drender|
This class was introduced in Qt 5.5.
|QNoDraw(Qt3DCore::QNode *parent = nullptr)|
Qt3DRender::QNoDraw should be used when the FrameGraph needs to set up some render states or clear some buffers without requiring any mesh to be drawn. It has the same effect as having a Qt3DRender::QRenderPassFilter that matches none of available Qt3DRender::QRenderPass instances of the scene without the overhead cost of actually performing the filtering.
Qt3DRender::QNoDraw is usually used as a child of a Qt3DRendeR::QClearBuffers node to prevent from drawing the scene when there are multiple render passes.
Qt3DRender::QViewport *viewport = new Qt3DRender::QViewport(); Qt3DRender::QCameraSelector *cameraSelector = new Qt3DRender::QCameraSelector(viewport); Qt3DRender::QClearBuffers *clearBuffers = new Qt3DRender::QClearBuffers(cameraSelector); clearBuffers->setBuffers(Qt3DRender::QClearBuffers::ColorDepthBuffer); Qt3DRender::QNoDraw *noDraw = new Qt3DRender::QNoDraw(clearBuffers); Qt3DRender::QRenderPassFilter *mainPass = new Qt3DRender::QRenderPassFilter(cameraSelector); .... Qt3DRender::QRenderPassFilter *previewPass = new Qt3DRender::QRenderPassFilter(cameraSelector); ....
Member Function Documentation
QNoDraw::QNoDraw(Qt3DCore::QNode *parent = nullptr)
The constructor creates an instance with the specified parent.