Thank you for your answer :)
No, I have to render the other viewport first...
The solution shoul be exactly what you are proposing:
teaching the ShadowStage to not touch pixels not
written to by the scene it renders.
Hope it is not too complicated...
In any case, Thank you :)
Christian
------------------------------------------------------------------------------------
Hello Christian,
On 03/15/2013 04:54 AM, Christian Bar wrote:
> Firstly I call window->addPort( viewport_2 ), then window->addPort(
> viewport_1 ) (misleading viewort names, maybe :) ),
>
> so the rendering order should be the one I told you (as the rendering
> without shadows demonstrates me).
ah, ok :)
> The problem shows only when I activate the ShadowStage...
yes, the ShadowStage works sort of like a post-processing effect that
redraws the whole viewport. I'll have to investigate the implementation
to see how difficult it would be to teach it not to touch pixels not
written to by the scene it renders. I'll look into it.
I'm assuming rendering the shadowed scene first is not an option for
you, right?
Cheers,
Carsten
On Fri, Mar 15, 2013 at 10:54 AM, Christian Bar <[email protected]> wrote:
> Firstly I call window->addPort( viewport_2 ), then window->addPort(
> viewport_1 ) (misleading viewort names, maybe :) ),
>
> so the rendering order should be the one I told you (as the rendering
> without shadows demonstrates me).
>
> The problem shows only when I activate the ShadowStage...
>
> Thanks,
>
> Christian
>
>
> ---------------------------------------------------------------------------------
>
> Carsten
> Neumann<http://www.mail-archive.com/[email protected]&q=from:%22Carsten+Neumann%22>
> Thu, 14 Mar 2013 16:34:09
> -0700<http://www.mail-archive.com/[email protected]&q=date:20130314>
>
> Hello Christian,
>
> thanks for the updated problem description!
>
> On 03/14/2013 09:45 AM, Christian Bar wrote:
> > I have one window. In this window I render two viewports, fully overlapping
> > inside the window.
> > Each viewport renders a different scenegraph. Let's call 'viewport_1' and
> > 'viewport_2' the two viewports.
> >
> > - viewport_1 begins with a Node containing a ShadowStage and has a
> > DepthClearBackground
> > - viewport_2 has no shadows and a GradientBackground
> >
> > When I call window->render(), I expect that:
> > - GradientBackground is rendered,
> > - viewport_2 scenegraph content is rendered,
> > - DepthClearBackground clears the depth buffer (not the frame buffer)
> > - viewport_1 is rendered (also with shadows)
>
> hmm, viewports are rendered in the order they are stored in the window,
> so viewport_1 should be first, then viewport_2.
>
> > What I see inside the window is only viewport_1 content, without a
> > background
> > (as if there were none, the framebuffer is not cleared).
> > This behaviour happens with every shadow mode.
>
> Given the render order above, my expectation would be that you only see
> the content of viewport_2 - something seems to go wrong though.
>
> > When I disable shadows, I see that everything works as expected.
> > Maybe it's useful for you to know that if I change the window size, the
> > framebuffer is cleared (with a black color).
>
> I think you'll have to put the GradientBackground on viewport_1 and the
> DepthClearBackground on viewport_2.
> Under normal circumstances (i.e. I suspect a bug is preventing this from
> working right now) this should give you the desired result. I'm looking
> into it.
>
> Cheers,
> Carsten
>
>
------------------------------------------------------------------------------
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