On Tue, 2007-06-12 at 16:52 +0200, [EMAIL PROTECTED] wrote:
> Dear All
> I implemented a Picking function...
> In order to debug the picking function I simply print in monitor the id of
> the picked drawable.
>
> The problem is that the picking function is called two time for each mouse
> click.
I don't think your picking function is getting called twice--I think
you're seeing the same object twice in your pick results, which is
something I'm running into myself. I just started learning picking this
weekend, so I'm not 100% sure what's going on, but perhaps someone else
will be able to chime in and help us both.
I originally suspected this had something to do with having a 2D HUD
Camera in my scene, but I don't think that's it.
> Does anyone know why it happens?
>
> This in my handler:
>
> class PickHandler : public osgGA::GUIEventHandler {
> public:
>
> PickHandler(osgProducer::Viewer* viewer, Player* player):
> _viewer(viewer),
> _player(player){}
>
> ~PickHandler() {}
>
> bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& us);
>
> virtual void pick(const osgGA::GUIEventAdapter& ea);
>
> protected:
> osgProducer::Viewer* _viewer;
> Player* _player;
> };
>
> bool PickHandler::handle(const osgGA::GUIEventAdapter&
> ea,osgGA::GUIActionAdapter&)
> {
> if( ea.getEventType() == osgGA::GUIEventAdapter::PUSH ) {
> if( ea.getButton() == osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON
> ) pick(ea);
> if( ea.getButton() ==
> osgGA::GUIEventAdapter::RIGHT_MOUSE_BUTTON ) _player->MoveToNextUpLevel();
> }
>
> return false;
> }
>
> void PickHandler::pick(const osgGA::GUIEventAdapter& ea)
> {
> osgUtil::IntersectVisitor::HitList hlist;
> if (_viewer->computeIntersections(ea.getX(),ea.getY(),hlist))
> {
> for(osgUtil::IntersectVisitor::HitList::iterator hitr=hlist.begin();
> hitr!=hlist.end();
> ++hitr)
> {
> std::ostringstream os;
> if (hitr->_geode.valid() && !hitr->_geode->getName().empty())
> {
> // the geodes are identified by name.
> osg::ref_ptr<NodeInfo> cellInfo =
> dynamic_cast<NodeInfo*>
> (hitr->_geode->getParent(0)->getParent(0)->getParent(0)->getUserData() );
> int id_time = cellInfo->GetTime();
> std::string id_cell = cellInfo->GetCellID();
> _player->CellPicked(id_cell, id_time);
> }
> else if (hitr->_drawable.valid())
> {
> os<<"Object
> \""<<hitr->_drawable->className()<<"\""<<std::endl;
> }
> }
> }
> }
>
>
> .....and this add it to the viewer
>
> viewer->getEventHandlerList().push_front(new PickHandler(viewer.get(),
> this));
>
> Thanks!!!!
>
>
>
> ------------------------------------------------------
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>
>
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