[osg-users] How to traverse the adjacent drawables

[OpenSceneGraph Users]

I think the easiest is to give the labels a certain name, then use a NodeVisitor and implement apply(Text3D) checking the name and setting the new font.

On 18. April 2020 09:54:24 MESZ, OpenSceneGraph Users <osg-users at lists.openscenegraph.org> wrote:
>I want to set the font of the axes labels(X,Y,Z) using GUI so I
>traverse 
>through the scenegraph, to access the axis labels(X,Y,Z) which are
>text3D 
>nodes. The function getLabelText3D(..) returns the drawables as text3D
>and 
>later set the font of the drawable  by setFont() but the font style
>only 
>gets applied on X label but not Y,Z. Now how do I access the remaining 
>drawables.
>
>
>osgText::Text3D* AxesNode::getLabelText3D(::osg::Node* axes)
>    {
>     osg::Switch *switch_node = getLabelSwitch(axes);   // returns the 
>switch node which has the Geode to which X,Y,Z text3D nodes are added
>as 
>drawables.
>        if(!switch_node)
>        {
>            return NULL;
>        }
>
>        osg::Node* node = switch_node->getChild(0);
>        osg::Geode* geode_node = node->asGeode();
>        if(geode_node && geode_node->getNumDrawables() > 1)
>        {
>           for(osg::Drawable* drawable : geode_node->getDrawableList())
>            {
>                osgText::Text3D* text = 
>dynamic_cast<osgText::Text3D*>(drawable);  //here I have three
>drawables 
>X,Y,Z but the function only returns X drawable
>                if(text)
>                {
>                    return text;
>                }
>            }
>        }
>        return NULL;
>    }
>
>
>
>void Vizkit3DWidget::setFont(....)
>{
>      
>      osg::Node *node = FindNode::find(*getRootNode(),"axes_node");
>         
>        osgText::Text3D*  text3d = 
>AxesNode::getLabelText3D(switch_node->getChild(0));
>    
>    text3d->setFont(font_d.get());                //only sets font for 
>X label, no effect on Y,Z label
> 
>emit propertyChanged("font");
>}
>
>
> 
>
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