SMesserschmidt wrote:
> Hi Petr,
>
>
>
> > Hi,
> >
> > I have a very weird problem.
> > I downloaded some models from Sketchup warehouse, exported as OBJ format
> > and then converted using osgconv to OSG format.
> >
> Could you please provide an example?
>
> >
> > Now, when I use osgUtil::LineSegmentIntersector then on some models "there
> > is" an intersection detected on others there is not. Why is that?
> > Is there a need of creating some bounding boxes or something like that? Or
> > some osgconv bug? Model bug?
> >
> How are you using the IntersectionVisitor? Providing an example model
> plus the code you are using would give us the means helping you.
>
> cheers
> Sebastian
>
> >
> > Thank you!
> >
> > Cheers,
> > Petr
> >
> > ------------------
> > Read this topic online here:
> > http://forum.openscenegraph.org/viewtopic.php?p=58730#58730
> >
> >
> >
> >
> >
> > _______________________________________________
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> >
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
>
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> Post generated by Mail2Forum
In my scene there are objects:
Code:
osg::Node* m_tv = osgDB::readNodeFile( "external/models/television.osg" );
m_tv->setName("television");
if(!m_tv)
{
std::cout << "Error: Couldn't find model!" << std::endl;
}
osg::ref_ptr<MyObject> television = new TV(this);
television->insertChild(0,m_tv);
television->setName("television");
//MyObject is abstract and it's basically PositionAttitudeTransform
Then I'm looking for intersection with these objects/models
Code:
//some inits etc...
//basic idea is that some of these objects which I'm interested in have names
as identifications getName("television") etc.. and I'm looking for them
osgUtil::LineSegmentIntersector::Intersections& intersections =
ins->getIntersections();
if ( !ins->containsIntersections() ) return std::string("");
for ( it = intersections.begin() ; it != intersections.end(); ++it )
{
for ( path_it = it->nodePath.rbegin(); path_it !=
it->nodePath.rend(); ++path_it)
{
MyObject* temp = dynamic_cast<MyObject*>(*path_it);
if ( temp == 0 ) continue;
if ( (*path_it)->getName() != "" ) //if my objects "of
interest" has a name
{
cdloc = it->getWorldIntersectPoint();
return (*path_it)->getName(); //returning identification
(name) od object
}
}
}
All of objects in the scene are downloaded from SketchUp Warehouse to SketchUp
application. Because of some "non compatible" format of models I export them
from SketchUp application as OBJ files.
Then using osgconv to convert them to OSG files.
The interesting part is that when I use different object for television, so in
code
Code:
osg::Node* m_tv = osgDB::readNodeFile( "external/models/radio_model.osg" );
instead of
osg::Node* m_tv = osgDB::readNodeFile( "external/models/television.osg" )
Then there is no Intersection collision detected or in other worlds
Code:
if ( (*path_it)->getName() != "" ) //if my objects "of interest" has a name
{
cdloc = it->getWorldIntersectPoint();
return (*path_it)->getName(); //returning identification (name) od
object
}
else return "";
this piece of code wont ever return other string then "".
I tried like 5 models, all the same way -> downloaded from Sketchup, exported,
converted, same code just different model.. Some of them worked (intersection
collision returned their identification via getName() ) some of them not.
I hope I explained it clearly
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=58732#58732
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