Hej,
Andreas Zieringer schrieb:
Hi Christian,
Hello,
i use OpenSG to view one or more wrl-files, which include a point
cloud. Therefore the files have a PointSet like this:
geometry PointSet {
coord Coordinate {
point [
-0.366116 -0.48644 -1.24413
...
]
}
}
To get a NodePtr i do the following as the tutorial showed:
NodePtr n = SceneFileHandler::the().read(filename);
Where can i get the info, how the resulting node looks like? I want to
change the material or something else. But without knowing the
structure, i can't do.
So somebody can tell me?
just traverse over the scenegraph and look for node with a MaterialGroup
core. Theres is an traversal example in Tutorials/09traverse.cpp
Thank you. It works great.
I've got a second question:
If i load more than one file into the scene, i get the following
warning when destroying the whole scene:
WARNING: Window::destroyGLObject: object 4 is NULL!
This warning only occures, if i load wrl-files with a "PointSet"-part.
What means the message? And how can it be avoid?
It seems to me, that OpenSG has some problems with "PointSet"-parts?
hmm strange do you have an example wrl file to reproduce this.
Andreas
I have found the error. It was a problem with Qt::QGLWidget::renderText(). This
function renders text directly into the gl-context. Therefore it allocates 256
DisplayLists for the characters of the QFont to render. If you don't give a free
index to the function it takes the default index 2000. But at this index OpenSG
has allocated allready DisplayLists.
So when i destroyed my ViewerObject, i got the warning above.
--
Love&Peace...
Christian
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