Art,
From what I can understand, it uses cameras, views and viewports. I believe
mostly from the osgSDLView, but it also uses "xlsignal"? to pass the pointers
around (this should be transparent and I am hoping that a simple casting will
do the trick). The way MPV works at the hi level is that a single window is
defined (per process). This window makes use of a single viewer which possibly
has multiple viewports. (I guess this is pretty normal...) The views are
defined in a definition file and the information driving them comes through the
CIGI protocol. Can I use the viewports and apply the osgPPU processors to
it(them) or do I have to attach the processor to the cameras(which might be
harder for me to do)? Also, I am still struggling with "extracting" my current
scene as a texture...
Thanks for the help
Patrick
Hi Patrick.
I am not familar with MPV, however let my try to help you ;)
To
let the ppu pipeline be applied for the complete scene, you have to
provide it with a texture containing your scene as input. If you use
the standard way, scene->osgPPU::Processor->osgPPU::Unit..., and
attach a camera which views on your scene to the processor, then the
camera output (which should be an RTT) will be provided into the
pipeline.
How is MPV handling scene rendering? Does it use
osg's camera or does it render directly to some texture without camera
intervention? If the second is true, then you can use UnitTexture as a
root unit of your pipeline to provide your rendering texture into the
pipeline.
Best regards,
Art
Hi,
I am trying to get osgPPU to work with the MPV project (a CIGI
compliant IG)... I am having a little bit of a hard time figuring out
how to get the two to talk to each other. As MPV is very modular and
based on a plugin stucture, what I have to work with (so far) is the
root node of the scene. The examples all have their own viewer that
are used by PPU but I would like to stay away from that and "just
insert" the pipeline to affect the intire scene (the displaying of the
scene is handled by an other plugin inside MPV).
Anybody have an idea of how could I attach a PPU pipeline to the scene?
My other option is to not use osgPPU and start doing my own RTT, a little like
Åsa Engvall is intending to do...
Patrick Castonguay
Technology Innovation Management (TIM) Student - Modeling and Simulation stream
Carleton University, Ottawa, ON
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