<div><BR>Hi Friends,</div> <div> I posted questions but till now without any answer.May be those answers are too easy.But I am stuck.I am posting those questions again:</div> <div> </div> <div>1) Suppose I have got a tube (of arbitrary shape),two ends of which are arbitrarily cut.I want to extract only those two ends.How can I do that?</div> <div> </div> <div>2)I have got a point on the surface of a tube and have calculated the normal at that point.Now I want to extend a line along that normal so that it cuts the other end on the surface of the tube and I want to get that point of intersection of this line with the tube at the other end.</div> <div> </div> <div>Thanks in advance.</div> <div>Sawsan</div> <div><BR> </div><p> 
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