Hi Carsten, hi Gerrit,
Carsten Neumann wrote:
> Hello Daniel,
>
> daniel trindade wrote:
>> In my application, i need to render the scene on the screen and also on
>> a texture. As you suggested, i'm using FBO and simple stage:
>>
>> root
>> |
>> +- SimpleStage
>> | |
>> | +- VisitSubTree -> ApplicationScene
>> |
>> +- ApplicationScene...
>>
>>
>> How can i set a specific node of ApplicationScene to be rendered on the
>> screen, but not by the simple stage?
>>
>> Is there a way to do that using travmask?
>
> a node (and the subtree below it) are only visited by the RenderAction
> if the bitwise AND of the node's travmask and the action's travmask is
> not zero. Since you are rendering the same ApplicationScene you can't
> have different travmasks on the node depending on whether it is is drawn
> to the FBO or screen.
> One way to achieve what you want is to render the two pieces not with a
> single call to renderAction->apply(root); but instead do this:
>
> renderAction->setTravMask(FBOMask);
> renderAction->apply(simpleStage);
>
> renderAction->setTravMask(ScreenMask);
> renderAction->apply(appScene);
>
> Another alternative would be to add a core that changes the trav mask
> when the RenderAction enters it and restores the previous value when the
> action leaves the core again.
Would it make sense to add that as an option to the VisitSubTree? It seems like
a sensible addition. Any reason not to do it?
Dirk
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