Miguel Howard schrieb:
So, RasMol/Chime is right-handed, but it has the +Y axis pointing
*down*.
no, only the Windows version,
I do not believe that it is only the Windows version.
RasMol 2.6b2 also has the +Y axis pointed down.
Since RasMol had it in this orientation, so does Chime.
on Irix RasMol2.7.2.1 shows up with true right-handed annotated axis
system, but
By 'true right-handed' I assume that you mean that +Y goes up.
no +y is down (+x right, +z into the plane) on Irix RasMol2.7.2.1
Regards, Jan
Someone else also told me that this changed in RasMol 2.7
At the present time I am not in a position where I can verify that with
RasMol 2.7.
(Note that we are going to try to keep this relatively simple by not
yet introducing the issue of rotations about the axes)
that is a problem,
though rotation on x and z are as expected, y rotation is not on Irix
(but it is in agreement with with the wrong axis annotation in RasWin)
this should be corrected in RasMol and RasWin, too.
We will discuss the rotation issues very soon.
First I want to get everyone to understand the current status of Chime and
the various versions of RasMol regarding axis orientation.
The rotation issue will be more difficult for people to understand and
will have a much larger impact on existing scripts.
What do people think we should do about it?
1. Maintain RasMol/Chime compatibility ... +Y points down
- RasMol/Chime users are used to seeing their molecules
in this orientation
- won't break existing scripts
- nobody really cares, just leave it alone
2. Break RasMol/Chime compatibility ... +Y points up
- this is the way it should have been done in the
first place, we have an opportunity to fix it,
let's not propogate errors
- if someone *really* needs to see their molecules
in the RasMol/Chime orientation they can just do a
'rotate x 180'
I vote for 2 don't pollute the Jmol code with bugs.
OK
3. Support both
- just add a switch/script command to Jmol
- it is easy to do ... Jmol already does both
- Q: What should the *default* orientation be?
- Q: What do you call this switch in a menu?
- Q: Any proposal for what the script command should be?
Miguel
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