When I used the osgEarth::Label or osgEarth::PlaceNode to add a text label or a icon-text label,
I found that the text can only have one line. Although I used a '\n' to force a newline in std::string, such as 'text1\ntext2', the text only has one line. Why the '\n' does not work?

So, I try to write a custom class to add multi-lines text label, naming CMultiLineLabel. I use two labelnode to add two lines text label. But a new problem arises. When I zoom in or out on the globe, the spacing between these two lines changes. How can I keep them the same?

I will appreciate it if you can help me!