_lineActor->SetMapper(_lineMapper);
_lineActor->GetProperty()->BackfaceCullingOn();
_lineActor->GetProperty()->SetDiffuseColor(0,0,1);
_lineActor->SetMapper(_lineMapper);
_lineActor->GetProperty()->BackfaceCullingOn();
_lineActor->GetProperty()->SetDiffuseColor(0,0,1);