Hi J.P.,
Which version of OSG are you using? There has been a fix for
VBO in Rev. 9362 which fixed some problems we encountered.
But as you didn't attach the source I can't tell if this
fix applies to your problem.
Cheers,
Peter
J.P. Delport schrieb:
Hi all,
I'm having a problem updating Vertex Buffer Objects (VBOs) after
creation. If I create geometry and use display lists everything is OK,
but if I switch to VBOs I get strange results (looks like
corrupted/missing data on the GPU).
Attached is an example (modified osgcompositeviewer) that shows the
issue. At first I need to determine if the same problem exists for other
people. To test run e.g.
./test -s -d
This uses display lists and should show what is expected. Press "space"
in one of the windows to see that the spiral is growing.
What I have issues with is
./test -s -v
This switches to VBOs and initially the points I added before the first
frame is shown correctly, but in my case if 'n press space the added
spiral geometry is not shown. If one zooms in one can still see the
original geometry though. The fact that one has to zoom shows that the
bounding box of the geometry is updated correctly, but the vertices seem
to go nowhere.
Attached a screenshot of one window showing corrupted data.
Any ideas/suggestions? Am I doing something silly?
regards
jp
PS. If one uncomments the line
//geometry_->getOrCreateVertexBufferObject()->dirty();
it seems that one of the views are updated OK when using VBOs, but not
the other.
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