[away3d] How to draw curves or lines in 3d space using away3d broomstick ?

[thinkingarden]

hi ,away3d team , would you please give us a demo on how to draw curve
or lines in 3d space using the broomstick API ,and how to control the
display and animation of such displayObject ? and do you have a
lineStyle or lineMaterial to style it up  ?