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camera order and PPU


 
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Riccardo Corsi
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PostPosted: Mon Jul 26, 2010 2:18 pm    Post subject:
camera order and PPU
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Hi Art and All,

by checking the glow example of osgPPU I was wondering if it's possible to render the glow (but in general any special fx ) camera AFTER the main one.
As a child unit waits for all parent to be drawn it should be possible, isn't it?

The reason I'm asking is that I don't understand how the glow camera can perform the depth test against the main depth_buffer, as it is rendered before the main one.
Is the depth_buffer of the main camera coming from the previous frame?

Thanks,
Ricky

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