[osg-users] Program design issue

[Martin Weier]

Since I am new to OSG I need some help for my program and some hints on 
where to start. The application needs to be able to add and remove 
geodes from the scenegraph dynamically each frame. For this I want to 
provide a queue of textures and primitives. that is update each frame 
based on the current camera-/view-frustrum position. To do so the queue 
will be entirely removed and than refilled.  Than all old geodes should 
be remove and the new ones should be added. In my first version I tried 
creating a group node and attached a update callback to it. During the 
callback step I tried to remove all nodes from the scenegraph but this 
call causes the program to crash. Since I am assuming that I can remove 
all elements of this group node during update and add new ones, I think 
that this crash is based on some pointer-/memory issues in my code. The 
Debugger outputs free(): invalid pointer. Even though everything seems 
to work fine when I remove everything expect the first.
However I am not sure if this is an efficient and the right way to do 
this. So a basic description, websites, example source code or a short 
statement on how to to all of the above would be very helpful
I would really appreciate some help..
Martin
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