Whoah! It works!
Thank you.
Hope you can make it work with the DepthClearBackground also when shadows
are enabled, but for now... Thanks!
On Tue, Mar 19, 2013 at 3:46 PM, Christian Bar <christ...@gmail.com> wrote:
> Thank you! ASAP I'll try it and I'll let you know :)
>
> Christian
>
>
> ---------------------------------------------
> I'm attaching a quick hack that makes the test case I have work. Before I
> clean it up and implement it properly would you mind giving it a try to
> see if it works for you as well? Thanks!
>
> There is one remaining issue I'm aware of:
>
> The viewport with shadows needs a SolidBackground with alpha == 0.f when
> shadows
> are enabled and a DepthClearBackground when shadows are disabled. I'm not
> sure how to get around that right now.
>
> Cheers,
> Carsten
>
>
>
>
>
> On Fri, Mar 15, 2013 at 5:11 PM, Christian Bar <christ...@gmail.com>wrote:
>
>> 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 <ch....@tiscali.it>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/search?l=opensg-users@lists.sourceforge.net&q=from:%22Carsten+Neumann%22>
>>> Thu, 14 Mar 2013 16:34:09
>>> -0700<http://www.mail-archive.com/search?l=opensg-users@lists.sourceforge.net&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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