QNoDraw#
When a QNoDraw
node is present in a FrameGraph branch, this prevents the renderer from rendering any primitive. More…
Note
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Detailed Description#
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 QRenderPassFilter
that matches none of available QRenderPass
instances of the scene without the overhead cost of actually performing the filtering.
When disabled, a QNoDraw
node won’t prevent the scene from being rendered. Toggling the enabled property is therefore a way to make a QNoDraw
active or inactive.
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); ....
- class PySide6.Qt3DRender.Qt3DRender.QNoDraw([parent=None])#
- Parameters:
parent –
PySide6.Qt3DCore.Qt3DCore.QNode
The constructor creates an instance with the specified parent
.