Hello, everyone.
In my application, I use ShapeDrawables, which are selected by the user
by mouse picking. An extract of the code concerning the picking is as
follows:
bool PickHandler::handle(const osgGA::GUIEventAdapter& ea,
osgGA::GUIActionAdapter& aa)
{
osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>( &aa );
osgUtil::LineSegmentIntersector::Intersections intersections;
if(!viewer)
{ return false; }
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
if(Intersecao(viewer, ea, intersections))
{
osg::notify(osg::NOTICE)<< "Selecao de ";
osgUtil::LineSegmentIntersector::Intersections::iterator
hitr = intersections.begin();
if(hitr->drawable.valid())
{
osg::ShapeDrawable* shapedrawable =
dynamic_cast<osg::ShapeDrawable*>(hitr->drawable.get());
changeColor(shapedrawable);
std::string nome = shapedrawable->getName();
}
}
}
}
}
bool PickHandler::Intersecao(osgViewer::Viewer* viewer, const
osgGA::GUIEventAdapter& ea,
osgUtil::LineSegmentIntersector::Intersections
&intersections)
{
return (viewer->computeIntersections(ea.getX(),ea.getY
(),intersections));
}
I've looked through the doxygen documentation but couldn't find
any method that would return the drawable where the shapedrawable is
attached to. This way I would be able to get to the parent that has all the
information I need. Let me give an example to simplify.
I have selected a sphere on the screen that is the drawable (in
the form of a shapedrawable) of an instace of the class Sphere (not the
osg's). How do I access the data that is inherent to every intance of that
class? A ShapeDrawable is not a Node, so I can't get a Parent... How do I do
it?
Thanks,
Renan M Z Mendes
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