Hello Victor,
On 06/02/2014 07:47 PM, Victor Haefner wrote:
> I tried to debug the shadows on cluster applications and I am somewhat
> stuck.
>
> Using gDEBugger I can confirm that the shadow map is like scrambled..
> I am not sure how to eliminate bad bounding volumes, I tried
>
> Vec3f min,max;
> root->getNode()->updateVolume();
> root->getNode()->getVolume().getBounds( min, max );
>
> for each frame, but this did not help.
> Is it possible to have wrong bounding volumes for the cluster
> application but not for the local application? (everything looks perfect
> on the local application)
well, they shouldn't, but since something appears to go wrong... ;)
Perhaps as a quick way to confirm if this is actually the cause, you
could print the bounding boxes on the server machines and compare to
local ones?
> Any hint on how to better debug?
My approach for this sort of thing is often to insert some output at
strategic places in OpenSG to get a better idea which steps are being
performed, e.g. in the *ShadowTreeHandler class for the mode of the
ShadowStage that you use, check if the all steps of the algorithm run,
and if they use sane settings. Comparing the projections used when
running in the cluster vs. locally could give another hint if the
bounding boxes are off.
I would suggest trying to find out first if the shadow map is broken
because it is rendered at very low resolution (i.e. with a giant frustum
for the projection) or if the generation step is perhaps not run at all
(or at the wrong time).
Cheers,
Carsten
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