section plane

I have a plane and an object(e.g cube), and they are intersected, now I want to get the section plane, will somebody give a hand to me?

What’s a section plane?

Originally posted by antipop:
What’s a section plane?

o, sorry, maybe I have misled you. of course I want to draw a line in the scene first, then I want to create a plane parallel to Z axis, at last I want to get the the intersected planes of other objects( if these object intersect with the plane), and show the intersected planes in other scene