This might be helpful under the general topic of loop structures for deleting elements from STL containers while avoiding invalidating iterators... http://blog.codedread.com/archives/2007/11/30/c-stl-safely-removing-items-from-a-container Happy New Year! -Joe
________________________________
From: [EMAIL PROTECTED] on behalf of Gordon Tomlinson
Sent: Thu 1/3/2008 8:43 AM
To: 'OpenSceneGraph Users'
Subject: Re: [osg-users] Error: 'Debug Assertion Failure!'
You might also want to see if the parent has any children first, as we know
has a getChildIndex slight bug in that it returns zero even if there are no
children which is a valid index ..
osg::Group* root = (*ponto_itr)->getParent(0);
if( root && root->getNumChildren() > 0 ) {
root->removeChild(root->getChildIndex((*ponto_itr)), 1);
}
or you could also do something like as remove child with a node as does the
right thing and the getChildIndex bug does not come into play the way it is
written
osg::Group* root = (*ponto_itr)->getParent(0);
if( root ) {
osg::Node* node = *ponto_itr;
if( node )
root->removeChild(node);
}
the you would need to erase the ponto_itr, your logic for your loop will need
to change as the interators will be invalidated when you use erase so you will
need to update them your self
__________________________________________________________
Gordon Tomlinson
Email : [EMAIL PROTECTED]
Website : www.vis-sim.com www.gordontomlinson.com
__________________________________________________________
"Self defence is not a function of learning tricks
but is a function of how quickly and intensely one
can arouse one's instinct for survival"
-Master Tambo Tetsura
________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gordon Tomlinson
Sent: 03 January 2008 16:08
To: 'OpenSceneGraph Users'
Subject: Re: [osg-users] Error: 'Debug Assertion Failure!'
I think you need to set your (*ponto_itr) to NULL or remove it from the vector
after you have done the remove child, other wise the pointer still has the
address of the child you previously removed so you for loop above (ponto_limp)
will never do any thing
__________________________________________________________
Gordon Tomlinson
Email : [EMAIL PROTECTED]
Website : www.vis-sim.com www.gordontomlinson.com
__________________________________________________________
"Self defence is not a function of learning tricks
but is a function of how quickly and intensely one
can arouse one's instinct for survival"
-Master Tambo Tetsura
________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Renan Mendes
Sent: 03 January 2008 14:43
To: OpenSceneGraph Users
Subject: [Norton AntiSpam] Re: [osg-users] Error: 'Debug Assertion Failure!'
Hi, Rafa,
I've tried doing something like what you've said before: every time
before I checked for selections with verifySelection(), I searched for a NULL
member and erased it, like it's done below. Can you tell me why it still isn't
working? Is there a logical flaw in my code?
Thanks,
Renan M Z Mendes
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if(!ponto.empty())
{
for(ponto_limp = ponto.begin(); ponto_limp != ponto.end();
ponto_limp++)
{
if(*ponto_limp == NULL)
{
ponto.erase(ponto_limp);
}
}
for(ponto_itr = ponto.begin(); ponto_itr != ponto.end();
ponto_itr++)
{
if((*ponto_itr)->verifySelection())
{
switch(ea.getKey())
{
case(ea.KEY_Delete):
{
osg::Group* root =
(*ponto_itr)->getParent(0);
root->removeChild(root->getChildIndex((*ponto_itr)), 1);
}
}
}
}
}
}
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