Hi All,
I'm trying to handle mouse movements to show some informations to the user.
I have basically two questions.
1) Lookig at "osgkeyboardmouse.cpp" example found the following code:
Code:
if (_useWindowCoordinates)
{
// use window coordinates
// remap the mouse x,y into viewport coordinates.
osg::Viewport* viewport = viewer->getCamera()->getViewport();
double mx = viewport->x() + (int)((double
)viewport->width()*(ea.getXnormalized()*0.5+0.5));
double my = viewport->y() + (int)((double
)viewport->height()*(ea.getYnormalized()*0.5+0.5));
// half width, height.
double w = 5.0f;
double h = 5.0f;
picker = new osgUtil::PolytopeIntersector(
osgUtil::Intersector::WINDOW, mx-w, my-h, mx+w, my+h );
} else {
double mx = ea.getXnormalized();
double my = ea.getYnormalized();
double w = 0.05;
double h = 0.05;
picker = new osgUtil::PolytopeIntersector(
osgUtil::Intersector::PROJECTION, mx-w, my-h, mx+w, my+h );
}
Is there a casa in which osgUtil::Intersector::WINDOW option is preferred with
respect to osgUtil::Intersector::PROJECTION?
2) osgUtil::LineSegmentIntersector does not seem to work fine if the geometry
is a line created with:
osg::Vec3Array* vertices = new osg::Vec3Array;
...
osg::DrawElementsUInt* elements = new
osg::DrawElementsUInt(osg::PrimitiveSet::LINE_STRIP);
geometry->setVertexArray(vertices);
geometry->addPrimitiveSet(elements);
In this case when I move the mouse over that geometry I get
containsIntersections() = false.
Could you please explain me why?
Regards,
Gianni
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=61492#61492
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