thank you for advise . As Resume here my working code:
Code:
osg::Geometry* linesGeom = new osg::Geometry();// is my geometry
osg::DrawArrays* drawArrayLines = new
osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP);
linesGeom->addPrimitiveSet(drawArrayLines);
osg::Vec3Array* vertexData = new osg::Vec3Array;
linesGeom->setVertexArray(vertexData);
osg::ref_ptr<osg::Geode> tmp_geode (new osg::Geode);// Greate test Geode
tmp_geode->addDrawable(linesGeom);
nazemTargetPathGroup->addChild(tmp_geode);// add geode to my osg::Group
// ADD SOME VERTEX
vertexData->push_back(osg::Vec3(0,0,0));
vertexData->push_back(osg::Vec3(0,0,5000));
vertexData->push_back(osg::Vec3(10000, 10000, 10000));
vertexData->push_back(osg::Vec3(-10000, -10000, -10000));
vertexData->push_back(osg::Vec3(-10000, 300, -10000));
drawArrayLines->setFirst(0);
drawArrayLines->setCount(vertexData->size());
// NOW ADD NEW VERTEX:
vertexData->push_back(osg::Vec3(100, 300, -10000));
drawArrayLines->setFirst(0);
drawArrayLines->setCount(vertexData->size());
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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=10019#10019
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