HI Moji,
You are falling foul of small feature culling as your bounding volume
has zero size. You can disable small feature culling by doing:
viewer.getCamera()->setCullingMode(
viewer.getCamera()->getCullingMode() &
~osg::CullSettings::SMALL_FEATURE_CULLING);
Robert.
On Thu, May 28, 2009 at 11:04 PM, Mojtaba Fathi <[email protected]> wrote:
>
> Hi all
> Accept my apology for such a simple question. I want to display two
> coincident points at (0,0,0). I use code like this:
>
> int main()
> {
> osgViewer::Viewer viewer;
>
> osg::ref_ptr<osg::Group> root (new osg::Group);
> osg::ref_ptr<osg::Geode> geode (new osg::Geode());
> osg::ref_ptr<osg::Geometry> geometry (new osg::Geometry());
>
> osg::ref_ptr<osg::Vec3Array> vertices (new osg::Vec3Array());
>
> vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
> vertices->push_back (osg::Vec3 ( 0.0, 0.0, 0.0));
>
> geometry->setVertexArray (vertices.get());
>
> geometry->addPrimitiveSet(new
> osg::DrawArrays(osg::PrimitiveSet::POINTS,0,vertices->size()));
>
> osg::Point *point=new osg::Point;
> point->setSize(4);
> root->getOrCreateStateSet()->setAttribute(point);
>
> geode->addDrawable (geometry.get());
> root->addChild(geode.get());
> viewer.setSceneData( root.get() );
>
> return (viewer.run());
> }
>
> But it displays nothing. I think it relates to BoundingBox and culling, so
> what should I do to display two coincident points at (0,0,0)? And how to do
> it for just one point?
>
> Regards, Moji
>
>
>
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>
>
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