Hi ,
does anyone knows a way to achieve the following.

For any line with p1 and p2 as the end points to translate/rotate as 
necessary to put
         p1 at <0,0,0> and p2 on the x axis
I need to then know necessary translate/rotate to be able to put them 
back.

I can see how to do this by evaluating all possible orientations for p2 
after moving p1 to <0,0,0>
This will end up very "heavy duty" so (as I know nothing of matrices 
etc.) I thought I would ask you guys if there is a more elegant way 
before going down that road.

Hopeful     ... Bob

A pointer in the right direction would be good (no pun intended)

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