Thanks for the quick reply. This is definetly not an indexing problem.
Starting bg removeDrawables from 1 was on purpose since starting from 0
didn't work.
Do you have an idea what else could go wrong?
Robert Osfield schrieb:
Hi Martin,
In general you shouldn't remove items from the scene during the cull
traversal. If you app is running single thread you sometime can get
away with it, but its not something to do routinely and when you do it
you have be very very careful to invalidate any iterators held by
calling methods.
In your case doing the removeDrawables is probably having problems
with deleting more objects that their are in the array. If you want
to remove all drawables, then you should use removeDrawable(0,
getNumDrawables()) NOT removeDrawable(1, getNumDrawables()) as the OSG
like C and C++ indexes everything relative to 0.
As for culling, culling doesn't normally mean deleting, it usually
would entail not traversing a subgraph so just don't call the apply on
the node visitor.
Robert.
On 5/10/07, *Martin Weier* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
I have a problem with removing drawables from a geode. I created a
class
which inherits from osg::Geode. In my class I overwrite the accept
method. The goal is to implement my own culling mechanism. So I
check if
the node visitor is a cullvisitor. Then I want to remove all drawables
and add new ones, depending on the camera position.
The Code looks like this.
void WWOsgNode::accept(osg::NodeVisitor &nv)
{
if( nv.getVisitorType() == nv.CULL_VISITOR)
{
printf("I am a cull Vistor\n");
try {
this->removeDrawables(1,this->getNumDrawables());
}
catch(...)
{
printf("Something wrong while removing stuff\n");
}
printf("Number of drawables in Displaylist:
%d\n",this->getNumDrawables());
...
}
this crashes the program. The program runs when I remove the
removeDrawables call. I already tried to iterate over all drawables
removing everyone with removeDrawable. This causes the same
problems. I
can provide a backtrace if this helps. My OpenSceneGraph version
is 1.2
on Ubuntu Feisty compiled from source. I tried other version of
OpenSceneGraph so I guess I am doing something wrong.
What am I missing?
I hope somebody can help
Martin
_______________________________________________
osg-users mailing list
[email protected] <mailto:[email protected]>
http://openscenegraph.net/mailman/listinfo/osg-users
http://www.openscenegraph.org/ <http://www.openscenegraph.org/>
------------------------------------------------------------------------
_______________________________________________
osg-users mailing list
[email protected]
http://openscenegraph.net/mailman/listinfo/osg-users
http://www.openscenegraph.org/
_______________________________________________
osg-users mailing list
[email protected]
http://openscenegraph.net/mailman/listinfo/osg-users
http://www.openscenegraph.org/
