Hi , Maybe you figured it out by now, but you are only looking at the "first intersection" of the picker ( getFirstIntersection). You need to iterate over all intersections.
Andrew On Fri, Dec 18, 2020 at 9:15 AM [email protected] <[email protected]> wrote: > > Hi, > > I need to make the selection (pick) of a node, going to check if that node is > present within an area built around the mouse click point. > > This should mean that, if there are more nodes inside that area, the pick > event returns them to me. > > Currently for the point selection, therefore of a single node in a specific x > and y, I successfully use osgUtil :: LineSegmentIntersector. > > Studying on the OSG book, I read that selection existed by checking inside a > box, implemented by osgUtil :: PolytopeIntersector. > > Below I propose part of the code, > > double w(200), h(200); > osgUtil::PolytopeIntersector* picker = new > osgUtil::PolytopeIntersector(osgUtil::Intersector::CoordinateFrame::WINDOW, x > - w, y - h, x + w, y + h); > osgUtil::IntersectionVisitor iv(picker); > viewer->getCamera()->accept(iv); > if (picker->containsIntersections()) > { > const osg::NodePath& nodePath = picker->getFirstIntersection().nodePath; > auto intersections = picker->getIntersections(); > if (intersections.size() != 0) { > auto hitr = intersections.begin(); > if (hitr->nodePath.size() != 0) { > for (int i = 0; i < hitr->nodePath.size(); i++) { > if (systemTargetMap[hitr->nodePath.at(i)->getName()]) { > cout << "Node Name: " << > systemTargetMap[hitr->nodePath.at(i)->getName()] << endl; > } > } > } > }} > > Unfortunately, this selection only returns me one node, even if there are two > (or more) very close together. > > What am I doing wrong? > > -- > You received this message because you are subscribed to the Google Groups > "OpenSceneGraph Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/osg-users/d757a21a-bab6-4718-a6bf-2ebdf59650a7n%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "OpenSceneGraph Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/osg-users/CAGTJuHijBs3EbXDFeDpiLkaZkApKQQqaP%2BrOg_%3DNng2KXXYsaw%40mail.gmail.com. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
