HI all,
I have now resolved the issue. I am not sure exactly what the PBO issue was but
I suspect I failed properly clean my build.
The artefacts were present as it seems that the default behaviour of PRE_RENDER
cameras has changed with respect to their clear masks.
To fix my issue all I had to do was explicitly tell each of my PRE_RENDER
cameras to clear the depth and colour buffers.
Cheers,
Brad
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Christiansen,
Brad
Sent: Thursday, 25 March 2010 10:59 AM
To: osg-users (osg-users@lists.openscenegraph.org)
Subject: [osg-users] Error with pixel puffer in trunk
Hi all,
I know this isn't much info to go on but, I have just updated my OSG release
from 2.9.5 to yesterdays trunk. Since the update, in my application, which is
based on the MFC example (though my native window handle comes from Java) I am
getting some very 'interesting' visual artefacts and the following error (about
10 times on start-up, then every time I resize the window or do the RTT):
no PixelBufferObject , pbo=
As far as I am aware I am never even requesting a PBO.
The artefacts I am seeing are related to two (extra) cameras I have in the
scene. Both cameras are pre-render, one renders a star field with a very large
far plane value (the depth buffer is then cleared by the main camera) and the
second camera does a RTT which is projected onto the globe. I am seeing the
objects rendered by the cameras but they do not seem to be doing the correct
clear operations. I have not modified any of my code, just simply re-built it.
I have attached a screen shot to demonstrate the artefacts.
I have no idea where to look to track down the issue. Any suggestions would be
greatly appreciated.
I am setting up the graphics context exactly as I was before:
RECT rect;
// Get the current window size
::GetWindowRect(hwnd, rect);
// Init the GraphicsContext Traits
osg::ref_ptrosg::GraphicsContext::Traits traits = new
osg::GraphicsContext::Traits;
// Init the Windata Variable that holds the handle for the Window to
display OSG in.
osg::ref_ptrosg::Referenced windata = new
osgViewer::GraphicsWindowWin32::WindowData(hwnd, true);
// Setup the traits parameters
traits-x = 0;
traits-y = 0;
traits-width = rect.right - rect.left;
traits-height = rect.bottom - rect.top;
traits-windowDecoration = false;
traits-doubleBuffer = true;
traits-sharedContext = 0;
traits-setInheritedWindowPixelFormat = true;
traits-inheritedWindowData = windata;
osg::GraphicsContext* gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
m_viewer-getCamera()-setGraphicsContext(gc);
m_viewer-setThreadingModel(osgViewer::ViewerBase::SingleThreaded);
Cheers,
Brad
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