3dAlign

I've a routine to align a 3Dobject, defined by the points P1, P2, P3, with
another 3Dobject defined by P4, P5, P6, so that P1 goes in P4, P2 in P5, P3,
in P6.



Normally the routine works; nevertheless, if the segment P1-P2 is parallel
to P4-P5, and in opposite direction, P1 goes in P4 but P2 goes in the
symmetric position of P5 with respect to P4-P6.



The only way I've found to solve the problem is to check in advance whether
the segments are parallel, and in this case apply a preliminary "funny"
rotation to the first object; but it seams to me very strange: really there
is not a different way ?



Thanks in advance.



Ferruccio Levi

 

Why you don't use the built in ALIGN command?

Juergen

 

But it is the ALIGN command which works in this way !
I call this command in a script file.

Ferruccio Levi

 

Do you see this strange behavior also if you use the align command from the
command line? If so, can you send me an example drawing? (delete all
capitals in my eMail adress)

Juergen

 

It is only a matter of names:.in my message I've defined the first object
with P1, P2, P3 instead of P1, P3, P5 as in AUTOCAD, but this is not
essential.

Ferruccio Levi