Actually I don't call dirtyBound() at all...I do not modify my geometry, so
I guess I don't need that call, am I wrong? Anyway, since I'm new to osg, I
also tried to call that function just after I assign the pyramid to the node
representing the scene object, like this: (in the main...)
...
osg::ref_ptr<osg::Node> scene = createPyramid(50.0f, 50.0f);
scene->dirtyBound();
...
but I still have the same problem.
Maybe it is a stupid question, anyway I ask: am I supposed to init/create in
some way the bounding box of any geometry I create? I mean, my
createPyramid() function just creates some vertices and the polygons that
represent the pyramid faces, then it sets vertices colors and texture
cooridnates but it does nothing more than that...do I have to compute the
bounding box using some Node/Geode's method?
Thanks.
Alessandro
On 4/18/07, Andreas Goebel <[EMAIL PROTECTED]> wrote:
alessandro terenzi schrieb:
> I cleaned up my code and here a simple example showing my problem:
> ...here's the handle method:
>
> bool myEventHandler::handle( const osgGA::GUIEventAdapter& ea,
> osgGA::GUIActionAdapter& aa )
> {
> osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>( &aa );
> if (!viewer)
> return false;
>
> switch( ea.getEventType() )
> {
> case osgGA::GUIEventAdapter::PUSH:
> case osgGA::GUIEventAdapter::MOVE:
> {
> _mX = ea.getX();
> _mY = ea.getY();
> return false;
> }
> case osgGA::GUIEventAdapter::RELEASE:
> {
> if (_mX == ea.getX() && _mY == ea.getY ())
> {
> if (pick( ea.getXnormalized(),ea.getYnormalized(), viewer ))
> return true;
> }
> return false;
> }
> default:
> return false;
> }
> }
>
> ...and here's the pick method:
>
> bool myEventHandler::pick( const double x, const double y,
> osgViewer::Viewer* viewer )
> {
> if (!viewer->getSceneData())
> // Nothing to pick.
> return false;
>
> double w( .05 ), h( .05 );
> osgUtil::PolytopeIntersector* picker = new
> osgUtil::PolytopeIntersector(osgUtil::Intersector::PROJECTION, x-w,
> y-h, x+w, y+h );
> osgUtil::IntersectionVisitor iv(picker);
>
> viewer->getCamera()->accept(iv);
> if (picker->containsIntersections())
> {
> std::cout<< "Found intersections..."<<std::endl;
> osg::NodePath& nodePath = picker->getFirstIntersection().nodePath;
> unsigned int idx = nodePath.size();
> while (idx--)
> {
> // look for osg::Geode object
> osg::Geode* my_geode =
dynamic_cast<osg::Geode*>(nodePath[idx]);
> if(my_geode == NULL)
> continue;
>
> std::cout<< "Picking successful..."<<std::endl;
> break;
> }
> }
> else
> {
> std::cout<<"Picking failed [no intersections]... "<<std::endl;
> return false;
> }
>
> return true;
> }
>
> ...and finally the main:
>
> int main(int argc, char* argv[])
>
> {
> osgViewer::Viewer viewer;
>
> osg::ref_ptr<osg::Node> scene = createPyramid(50.0f, 50.0f);
>
> viewer.addEventHandler(new myEventHandler);
>
> viewer.setSceneData(scene.get());
>
> return viewer.run();
> }
>
> The behaviour I'm experiencing is as follow: after clicking far away
> from the pyramid I got this output on the console:
>
> *Picking failed [no intersections]...*
>
> after clicking inside one of the pyramid's faces, I got:
>
> *Picking failed [no intersections]...*
>
> finally when I clicked on the apex, I got:
>
> *Found intersections...
> Picking successful...*
>
> Any Idea about what is wrong?
>
> Thanks.
>
> Alessandro
>
>
>
> O
>
You do not show where you create your geometry. Did you call dirtyBound()
?
Regards,
Andreas
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