[Interest] Split entities into groups and render them in custom order

[Oleg Evseev]

Harald,

Got it, thank you.

2016-07-12 18:35 GMT+03:00 Harald Vistnes <harald.vistnes at gmail.com>:

> Oleg,
>
> Add an instance of QNoDepthMask. It inherits QRenderState.
>
> Look in the qt3d/src/render/renderstates folder for all available
> renderstates. I don't think they are all documented yet.
>
> Harald
> Thank you, Sean and Harald.
>
> I tried that order you suggested in "enable-qml" as I mentioned in the
> previous letter (2016.07.10)
>
> Only if I put ClearBuffers into LayerFilter:
>> * Viewport
>> ** RenderSurfaceSelector
>> *** CameraSelector
>> **** LayerFilter [layer = sceneLayer]
>> ***** ClearBuffers
>> filtering got work
>>
>
> And this one is working too (thanks, do not about NoDraw class):
>
> alternatively put a NoDraw as a child of CLearBuffers to prevent that
>> branch from drawing anything.
>>
>
> But in my project with "opaque", "environment" and "transparent" layers
> this order:
>
> * Viewport
> ** RenderSurfaceSelector
> *** CameraSelector
> **** LayerFilter [layer = opaque]
> ***** ClearBuffers
> **** LayerFIlter [layer = environment]
> **** LayerFilter [layer = transparent]
> ***** SortPolicy [ front to back]
>
> didn't work in first - there was only environment entity. That's why I
> wrote new letter.
>
> After all, I have understood that it was my bad. The thing is that every
> drawable entity should have layer component, that is, if only root entity
> have layer component (as I did), it's children are filtered and not
> rendered.
>
> *Entity (layer= opaque)
> **Entity child 1 (mesh,material, [not rendered if there is no layer])
> **Entity child 2 (mesh,material, [not rendered if there is no layer])
>
> I can add Layer to all "my" own entities, I am creating, but what should I
> do with many entities within obj 3d model loaded with help of SceneLoader.
> I need to loop through all entities and add corresponding layer to each? Or
> may be there is another way to tell framegraph to render all entities that
> are inside Entity with Layer component?
>
>
> p.s. still have a question about how to do RenderStateSet [ disable depth
> writes ] leaf, you wrote about
>
> QRenderStateSet *renderStateSet = new QRenderStateSet();
>
> QRenderState *renderState = new QRenderState();
>
> renderState->???;
>
> renderStateSet->addRenderState(renderState);
>
>
> How to make "disable depth writes" renderState?
>
> Thank you for help!
>
> ---
> Regards, Oleg
>
>
> 2016-07-12 12:17 GMT+03:00 Sean Harmer <sean.harmer at kdab.com>:
>
>> Hi,
>>
>> On 12/07/2016 09:18, Harald Vistnes wrote:
>>
>> Oleg,
>>
>> Did you try putting the ClearBuffers as a child of the first LayerFilter?
>> Then the second LayerFilter can be a leaf node.
>>
>> * Viewport
>> ** RenderSurfaceSelector
>> *** CameraSelector
>> **** LayerFilter [layer = opaque]
>> ***** ClearBuffers
>> **** LayerFilter [layer = transparent]
>>
>>
>> That should work, or alternatively put a NoDraw as a child of
>> CLearBuffers to prevent that branch from drawing anything.
>>
>> Cheers,
>>
>> Sean
>>
>> Harald
>> On Jul 12, 2016 09:38, "Oleg Evseev" < <ev.mipt at gmail.com>
>> ev.mipt at gmail.com> wrote:
>>
>>>
>>> 2016-07-10 19:09 GMT+03:00 Oleg Evseev <ev.mipt at gmail.com>:
>>>
>>>> I tried to make following sequence in "enable-qml" manual test example
>>>> by cleaning it (attached it):
>>>>
>>>> * Viewport
>>>> ** RenderSurfaceSelector
>>>> *** CameraSelector
>>>> **** ClearBuffers
>>>> **** LayerFilter [layer = sceneLayer]
>>>>
>>>> And it renders whole scene (sphere + floor), that is, ignores
>>>> LayerFilter:
>>>>
>>>
>>> Experiment with different ordering, still can't understand how it works.
>>> May it be a bug with LayerFilter? Should I file in JIRA?
>>>
>>> ---
>>> Regards, Oleg
>>>
>>>
>>>
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>>
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-- 
С Уважением,
Евсеев Олег.
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