[osg-users] Pick multiple node

[Vincent Bourdier]

Hi Robert,

Thanks very much I understand well why I have these results.
I'll see how I can manage it.

Thanks a lot.

Regards,
   Vincent.

2008/4/1, Robert Osfield <robert.osfield at gmail.com>:
>
> HI Vincent,
>
> The osgUtil::IntersectionVisitor will return multiple Intersection
> objects if there are multiple intersections with a geometry.  For
> instance when a ray goes through a box it'll produce two hits, if it
> goes through a plane it'll produce one.  There are exceptions that do
> to numerical precision it'll return two hits for a plane when the ray
> hits the edge between two triangles.
>
> If you just want high level hit info such as what objects have been
> hit rather than low level where exactly are the intersection points
> then just pick the nearest intersection, or sort the results so that
> you only have on intersection per separate object.  It's worth
> remembering that the OSG IntersectionVisitor is a general purpose
> utility class so has to provide a the full spectrum of results rather
> than prefiltering it.
>
> Robert.
>
>
> On Tue, Apr 1, 2008 at 9:31 AM, Vincent Bourdier
> <vincent.bourdier at gmail.com> wrote:
> > Hi all,
> >
> > For my application, I use the picking. but there is something strange :
> >
> > When I pick a node (geode) I get a list of node path... so all is
> good...
> > but in the list, the same nodepath can appear more that one time,
> sometimes
> > two, sometimes four...
> >
> >
> > Is there any reason for that ? Or what can make this result ?
> >
> > Thanks,
> >
> > Regards.
> >     Vincent.
> >
>
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