Thanks for your reply!

I want to draw a curved surface dynamic, like the function Mesure area in 
skyline.
now i have the profile line of the curved surface,but just lines,not a polygon 
or a surface.
my issue is: 
how to display the profile line to be a  enclosed area, not lines.
use OverlayNode??

Thank you!

Cheers,
Pan

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http://forum.openscenegraph.org/viewtopic.php?p=15801#15801





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