[osg-users] Limit on number of children ?

[Paul Melis]

You shouldn't have to use a separate Group as a Geode is a subclass of 
osg::Node and therefore can be held in a osg::Group.

Do you have a stack trace for the case where you app crashed?

Paul

Vincent Bourdier wrote:
> Yes, i did it and it works well, but I don't understand why I have to 
> use a group...
>
> Thanks,
>     Vincent
>
> 2008/5/2 Gordon Tomlinson <gordon at gordon-tomlinson.com 
> <mailto:gordon at gordon-tomlinson.com>>:
>
>     HI
>
>      
>
>     Try creating a group and adding the Moon and Sun geodes to that
>     and then add this new group to your Root
>
>      
>
>     Personally I never give a  geode to the root node (
>
>      
>
>     __________________________________________________________
>     /Gordon Tomlinson /
>
>     Email   : /gordon at GordonTomlinson.com
>     <mailto:gordon at GordonTomlinson.com>/
>     YIM/AIM : /gordon3dBrit/
>     MSN IM  : /gordon3dBrit at 3dscenegraph.com
>     <mailto:gordon3dBrit at 3dscenegraph.com>/
>     Website : /www.vis-sim.com <http://www.vis-sim.com>
>     www.gordontomlinson.com <http://www.gordontomlinson.com>/
>
>     __________________________________________________________
>
>      
>
>     *From:* osg-users-bounces at lists.openscenegraph.org
>     <mailto:osg-users-bounces at lists.openscenegraph.org>
>     [mailto:osg-users-bounces at lists.openscenegraph.org
>     <mailto:osg-users-bounces at lists.openscenegraph.org>] *On Behalf Of
>     *Vincent Bourdier
>     *Sent:* Friday, May 02, 2008 8:45 AM
>     *To:* OpenSceneGraph Users
>
>     *Subject:* Re: [osg-users] Limit on number of children ?
>
>      
>
>     Thanks for help,
>     a bit of code will be more clear so this is something approaching :
>
>     osg::Geode* createMoon(std::string texturePath);
>     osg::Geode* createSun(std::string texturePath);
>
>     and in the main:
>
>         _root->addChild(createSkyMap
>
>     (config->Skypath));   
>         _root->addChild(createSunLight(_root.get()));
>         _root->addChild(earthGroup);
>     ...
>         _root->addChild(createSun(...))   //ok
>        _root->addChild(createMoon(...))  //error
>
>     but if I do this :
>
>         _root->addChild(createSkyMap(config->Skypath));   
>         _root->addChild(createSunLight(_root.get()));
>         _root->addChild(earthGroup);
>     ...
>         //_root->addChild(createSun(...)) 
>        _root->addChild(createMoon(...))  //ok
>
>     So I don't understand what can be the problem...
>     I if put createSun() or createMoon() it work well, but if I put
>     the two, it crashes...
>
>     I hope it's more clear now.
>
>     Thanks,
>        Vincent
>
>      
>
>     2008/5/2 Paul Melis <paul at science.uva.nl
>     <mailto:paul at science.uva.nl>>:
>
>     Vincent Bourdier wrote:
>     > Somewhere in my code, I make some
>     root->addChild(functionCreateGeode());
>     >
>     > but when I added a last one, OSG crash on rendering, pretending
>     a vector
>     > error.
>     > I've verified, it do not depend on the Geode, because it work if I
>     > remove an "addChild()" before doing mine...
>
>     Not sure what you mean here, showing the relevant code might help.
>
>
>     > Is there a limit in the number of child ? or is it impossible to
>     add 2
>     > Geode (or more) on the same group ?
>
>     A Group node keeps its children nodes using a std::vector, which
>     doesn't
>     have any practical length limit (other than available memory and an
>     integer counter of the number of items which might overflow).
>
>     Without seeing your actual code I'd guess this has something to do
>     with
>     not using ref_ptr where you should.
>
>     Paul
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>      
>
>
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