John Tullamarine and Old smokey:
What elegant techniques...shame not to good for the FARS
I posted actually before seeing the other techniques, but at least with J_T's
definitions the geometry is more clear to me.
as far as the math, ahhh I see now-But I try to sneak The Calculus into every matter, even where it's not wanted
Old Smokey- what a shame about that Obstacle Data...I really wouldn't mind a heartier 'salad' speaking as a Pax now
thankyou both for sharing your knowledge
rhov