Herbert said:

> To help get us all on the same page, I have prepared a draft
> positioning test at:
>
>   http://arcib.dowling.edu/~BernsteH/postest/
>
> I will run rasmol for a variety of platforms (including sgi, mac and
> windows )through this test later today and see if we have gotten
> turned around on any of them.

Thanks for posting this. It is helpful.

There were several follow-up messages about this on jmol-users, and you may
not have been copied on some critical ones.

I believe that the general concensus is that the confusion is caused by
a labelling error in RasWin (and possibly some older versions of RasMol).

Jan says that RasWin puts the Y label at the *top* of the axis, which
is actually the negative end.

Nevertheless, the coordinate system *is* right-handed ... it was only a
labelling issue.

Jan also says that this problem does not exist in RasMol 2.7


> In any case it is the intention,
> as stated in the manual for y to be increasing going down and x
> to be increasing going to the right.

This was actually the genesis of the discussion on jmol-users ... the fact
that the +Y axis goes down.

The axis orientation discussion was a prelude to the *real* discussion
that we need to have about the rotations in RasMol.


Miguel





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