[Opensg-users] Stages

Discussion:

[Opensg-users] Stages - DataSlotId

Michael Raab

2015-03-16 11:30:23 UTC

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Michael Raab

2015-03-16 15:15:41 UTC

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Carsten Neumann

2015-03-16 19:01:54 UTC

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Hello Michael,

just wanted to detail my question...
I would like to access some data that is local to a certain stage.
Stages typically store their data using iDataSlot, which makes access to
those a bit unhandy.
My current case refers to the DeferredShadingStage. I would like to get
access to a certain TextureObjChunk to be able to share it with a
successive stage.
So could someone please tell me
- why this iDataSlot concept was implemented and

many stages have internal objects that depend on the camera (or window)
that is being rendered to - think framebuffer object attachments. In
order to avoid constantly re-sizing these when the same scene is
rendered from different viewports they are stored with the iDataSlot
mechanism which makes them local to the RenderAction - this uses the
assumption that different viewports are rendered with different
RenderActions, but that is often the case.

- what would be the appropriate approach to access that stage related
data.

Hmm, I suppose one option could be to additionally store the last used
object in the stage itself. Or perhaps add an interface that allows
access to the data store when given a RenderAction.

Cheers,
Carsten