Jonathan P. Greig aka redteam316 RIP 6/13/1984 - 2/7/2016
On Mon, Sep 25, 2017 at 3:25 PM, Gil H <q...@tastytech.ca> wrote: > Thanks very much for the example, Sean. It’s much clearer now that I see > RenderStates in use (for some reason I thought they only applied in Effect)… > > There is a pretty serious issue that is blocking me from using Qt3D for > augmented reality, which is that QtMultimedia’s VideoOutput doesn’t work > when the window surface uses CoreProfile (tested on Mac). This issue was > given a low priority and is a year and a half old: > https://bugreports.qt.io/browse/QTBUG-51064 > <https://u5810871.ct.sendgrid.net/wf/click?upn=RgE1ASyOg54bH5KXOAIcDCNgCWqccrQ-2FpQuIrXIrfIJMy2TtuL9LVEN2mNDqCmUOgEyuwohNEwt6hzEhA36JiQ-3D-3D_wBwg3POqus3ycpk-2F0rxnkTh6GGX9m8uP6qHpajPv1FEqh6WFzqVsUSHUCdA-2BOqQY-2FNCuZVv79ETVvii1V4bbxv4SmlrJUt-2F-2FdM6WNEpEe2Oh4y2k29Db7BHceI00Q7BiXLMjpeO6sfy6p60Gd8suzJAArtjpHrJx4jcPOEQ9Od4FR3O54CZDcjiXIvnPZ1By6Mvk8NMavR8K639TrZc3LraMz8wX9ziddpiBosWMLrM-3D> > > Cheers, > > Gil > > On 2017-09-23, 7:22 AM, “Sean Harmer” <sean.harmer on behalf of > sean.har...@kdab.com> wrote: > > Hi, > > On 20/09/2017 18:43, Gil H wrote: > > Hi everyone, between StencilMask, StencilTest, and StencilOperation QML > > items and their sparse documentation, I have been unable to achieve > > something fairly straightforward with a custom framegraph. > > The render states work in exactly the same way as raw OpenGL states just > in an object oriented fashion. A nice page with a stencil example is: > https://open.gl/depthstencils > > > Specifically, I am trying to render one object (say, a torus) to the > > stencil buffer, and then use that to mask out the rendering of the rest > > of the scene in the second pass. Can anyone provide an example frame > > graph that does this? > > I've created the small attached example that demonstrates this for you. > It renders a torus shaped entity as a mask, followed by a simple cube as > the actual scene content. Left clicking on the cube toggles whether the > stencil buffers masks in or masks out the scene layer content. I've > briefly documented the MaskedForwardRenderer.qml frame graph for you. > > To control which entities are rendered in each phase of the frame, we > use a Layer and LayerFilter combination - don't forget to assign the > scene layer to your lights too. > > To improve the stencil writing pass, you could use a trivial shader > program that does the bare minimum of work rather than the phong > material I've used here for convenience. > > Hope this helps, > > Sean > -- > Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK > KDAB (UK) Ltd, a KDAB Group company > Tel. +44 (0)1625 809908 <+44%201625%20809908>; Sweden (HQ) +46-563-540090 > <+46%20563%2054%2000%2090> > Mobile: +44 (0)7545 140604 <+44%207545%20140604> > KDAB - Qt Experts > > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > >
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