[osg-users] [Question about StateSet.cpp] truncated attribute override value?

[Julien Valentin]

Thanks,
That's what i suspected...

Have a good day:)


Voerman, L. wrote:
> Sorry, you are right, i did not read your question properly.Modes could have a value OFF, attributes do not, they are always ON
> Laurens.
> 
> 
> On Thu, Sep 10, 2015 at 1:35 PM, Julien Valentin < ()> wrote:
> 
> > I think you misread the question:
> > You can't know if the flags is ON/OFF as the bit seams ignored and then not stored...
> > Using the posted code, it never returns 1.
> > 
> > 
> > 
> > 
> > Voerman, L. wrote:
> > 
> > > Hi Julien,it's OFF, the enum for StateAttribute::OFF is 0x0, so anything not ON has value OFF.
> > > Regards, Laurens.
> > > 
> > > 
> > > 
> > > 
> > > On Wed, Sep 9, 2015 at 7:45 PM, Julien Valentin < ()> wrote:
> > > 
> > > 
> > > > Hi,
> > > > Iwould like to introspect StateSet in order to know which override value is activated for a particular stateset.
> > > > I parse AttributeList for this
> > > > 
> > > > Code:
> > > > for( osg::StateSet::AttributeList::const_iterator it=ss->getAttributeList().begin();it!=ss->getAttributeList().end() ; it++)
> > > > {
> > > >             if((*it).second.first ==stateattribute)
> > > >             {
> > > >                 if( (*it).second.second & osg::StateAttribute::ON)
> > > >                 return(1);
> > > >                 else return(0);
> > > > }
> > > > 
> > > > 
> > > > 
> > > > but according to StateSet.cpp l.1662
> > > > 
> > > > Code:
> > > > attributeList[attribute->getTypeMemberPair()] = RefAttributePair(attribute,value&(StateAttribute::OVERRIDE|StateAttribute::PROTECTED));
> > > > 
> > > > 
> > > > 
> > > > the ON OFF bit is removed from the given user value. So I can't determine if an osg::Attribute is ON or OFF but only if it's OVERRIDE or PROTECTED
> > > > I would like to know if there's a known reason behind this logic & and further if you know a mean to retrieve the ON/OFF bit.
> > > > 
> > > > Thank you!
> > > > 
> > > > Cheers,
> > > > Julien
> > > > 
> > > > ------------------
> > > > Read this topic online here:
> > > > http://forum.openscenegraph.org/viewtopic.php?p=65081#65081 (http://forum.openscenegraph.org/viewtopic.php?p=65081#65081) (http://forum.openscenegraph.org/viewtopic.php?p=65081#65081 (http://forum.openscenegraph.org/viewtopic.php?p=65081#65081))
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
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