Hi,
On 10/01/11 18:09, Brian R Hill wrote:
jp,
thanks for responding. i haven't tried this before so my initial
concern was that this was the correct approach. i'm assuming from
your response that it should work but that i'm missing some detail.
i'll start digging deeper to see if i can figure out what i'm doing
wrong.
I think it should work :)
clear masks rtt camera 1 is color, depth, stencil rtt camera 2 is
color only
projections both cameras have the same projection
depth range not doing anything with depth range
A problem can occur where OSG auto computes the depth range (near/far)
for your 2 cameras and it differs. Then it obviously does not make sense
to reuse the depth buffer, because the depth range would not match.
See this thread:
http://thread.gmane.org/gmane.comp.graphics.openscenegraph.user/63891
It's not RTT but also uses multiple cameras.
jp
i'll look through the renderstage code.
brian
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-----osg-users-boun...@lists.openscenegraph.org wrote: -----
To: OpenSceneGraph Users<osg-users@lists.openscenegraph.org> From:
"J.P. Delport"<jpdelp...@csir.co.za> Sent by:
osg-users-boun...@lists.openscenegraph.org Date: 01/10/2011 02:05AM
Subject: Re: [osg-users] depth and stencil buffers in multi-pass rtt
Hi,
what is your clearmask set to for the 2nd camera? Are the
projections the same for the 2 cameras? How about depth range?
Only other thing I can recommend is have a look at
osgUtil/RenderStage.cpp and check for search for "depthAttached".
You'll find the code and osg bitmasks you can set for controlling
depth/stencil for FBO.
jp
On 10/01/11 01:02, Brian ... wrote:
folks,
i'm trying to create 2 render to texture cameras that share the
same depth and stencil buffer.
i want to render color, depth, and stencil values with the first
rtt camera and then use the resulting depth and stencil with the
second rtt camera.
this is what i'm doing:
create color texture1 create depth texture create stencil texture
create rtt camera 1 attach color texture 1 attach depth texture
attach stencil texture
create color texture2
create rtt camera 2 attach color texture 2 attach depth texture
attach stencil texture
here's the scene graph
root rtt camera 1 scene group 1 rtt camera 2 scene group 2
the color, depth, and stencil textures look ok coming out of camera
1, but the depth and stencil textures after camera 2 are blank (all
zero).
is this the right way to do this?
thanks,
brian
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