Hello,
On 24. Mar 2012, at 12:37, W.Xu [via Software] wrote:
> For example, to render a scene with shadow there are two stages: first the
> shadow map from the light's view, then the scene from the observer's view.
> Each of these two steps requires entirely different settings including
> viewport, frustum and output buffer sizes. And sort first/sort last
> decomposition is needed by both stages to provide scalability.
Task decomposition is not something we support yet natively in Equalizer.
Getting it to scale in a non-trivial setup is still a research topic. ;)
That said, you might be able to hard-configure something which suits your needs:
> compound
> {
> compound
> {
> channel "final_channel"
> inputframe { name "illumination0" }
> inputframe { name "illumination1" }
> compound
> {
> channel "illum0_channel"
> inputframe "shadow_map0"
> outputframe "illumination0"
> compound
> {
> channel "shadow0_channel"
> projection { ...... } # Shadow map need a different
> view
> outputframe "shadow_map0"
> }
> }
> ##############################
> # Another similar illumination channel
> ##############################
> }
> }
>
>
> In the above configuration, although I struggled to set a new view/frustum
> for the shadow map, I cannot control its viewport size. As the viewport size
> of "final_channel" changes, all the outputframes changes their sizes.
The pixel viewport is inherited from the destination channel down to all leafs.
You can work around that by the following structure:
- compound
-- compound "final", 2x input frames
-- compound "illum", 1x output frame
-- compound "shadow" 1x output frame
In this case, you've got three destination channels, each controlling its own
pixel viewport. If you use view/segment destination channels, you can control
their frustum by setting the wall of the corresponding views.
HTH,
Stefan.
--
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http://software.1713.n2.nabble.com/Is-it-possible-to-build-a-multi-stage-rendering-pipeline-with-the-Equalizer-library-tp7401123p7408566.html
Sent from the Equalizer - Parallel Rendering mailing list archive at Nabble.com.
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