Hi Praveena, On 5/07/12 23:19 , Praveena Sara wrote: > Code: > osg::ref_ptr<osg::Geometry> beam = new osg::Geometry; > > osg::ref_ptr<osg::Vec3Array> points = new osg::Vec3Array; > points->push_back(StartPoint); > points->push_back(EndPoint); > > osg::ref_ptr<osg::Vec4Array> color = new osg::Vec4Array; > color->push_back(osg::Vec4(0.0f,1.0f,0.0f,1.0f)); > > beam->setVertexArray(points.get()); > beam->setColorArray(color.get()); > beam->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE); > beam->addPrimitiveSet(new osg::DrawArrays(GL_LINES,0,2)); > > osg::ref_ptr<osg::Geode> geode = new osg::Geode; > geode->addDrawable(beam.get() ); > > > osg::ref_ptr<osg::LineWidth> lineWidth = new osg::LineWidth; > lineWidth->setWidth(5.0f); > > osg::StateSet* stateset = geode->getOrCreateStateSet(); > stateset->setAttribute(lineWidth.get()); > stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF); > > pat->addChild(geode); //osg::PositionAttitudeTransform > > > > The lines are drawn precisely but the screen is not refreshed, thus it keeps > all the > previously drawn lines. (Screenshot attached)
It's not really possible to tell what might be going wrong based on the code fragment you've provided. Is this setup code? Called every time for a new line? You're apparently creating a new osg::Geode with a new osg::Drawable every time and adding the geode to an existing osg::PositionAttitudeTransform, without removing previous objects. I guess the PAT is just gathering a new Geode every time. If you only need a single line it's better to just create a single Geode and modify the coordinates on its Geometry/VertexArray. Cheers, /ulrich _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
