osg::Object *RefosgBillboard::getChildObject(unsigned i) {
if (i < 1) {
return _object->getUpdateCallback();
} else {
i -= 1;
}
if (i < 1) {
return _object->getStateSet();
} else {
i -= 1;
}
if (i < 1) {
return _object->getEventCallback();
} else {
i -= 1;
}
if (i < _object->getNumDrawables()) {
return _object->getDrawable(i);
} else {
i -= _object->getNumDrawables();
}
if (i < 1) {
return _object->getCullCallback();
} else {
i -= 1;
}
throw std::out_of_range("child");
}
unsigned RefosgBillboard::getNumChildren() {
unsigned cnt = 0;
cnt++;
cnt++;
cnt++;
cnt+= _object->getNumDrawables();
cnt++;
return cnt;
}
osg::ref_ptr<osg::Geode> VTKActorToOSG(vtkActor *actor, osg::ref_ptr<osg::Geode> geode, int verbose)
{
// make actor current
actor->GetMapper()->Update();
// this could possibly be any type of DataSet, VTKActorToOSG assumes polyData
if (strcmp(actor->GetMapper()->GetInput()->GetClassName(), "vtkPolyData"))
{
std::cerr << "ERROR! Actor must use a vtkPolyDataMapper." << std::endl;
std::cerr << "If you are using a vtkDataSetMapper, use vtkGeometryFilter instead." << std::endl;
return NULL;
}
// if geode doesn't exist, then create a new one
if (!geode.valid())
geode = new osg::Geode();
// get poly data
vtkPolyData *polyData = (vtkPolyData *) actor->GetMapper()->GetInput();
// get primitive arrays
osg::ref_ptr<osg::Geometry> points, lines, polys, strips;
// create new Geometry for the Geode
points = processPrimitive(actor, polyData->GetVerts(), osg::PrimitiveSet::POINTS, verbose);
lines = processPrimitive(actor, polyData->GetLines(), osg::PrimitiveSet::LINE_STRIP, verbose);
polys = processPrimitive(actor, polyData->GetPolys(), osg::PrimitiveSet::POLYGON, verbose);
strips = processPrimitive(actor, polyData->GetStrips(), osg::PrimitiveSet::TRIANGLE_STRIP, verbose);
// remove old gsets and delete them
geode->removeDrawables(0, geode->getNumDrawables());
if (points.valid())
geode->addDrawable(points.get());
if (lines.valid())
geode->addDrawable(lines.get());
if (polys.valid())
geode->addDrawable(polys.get());
if (strips.valid())
geode->addDrawable(strips.get());
return geode;
}