Herbert said:
> I believe most users are used
> to the coordinate system in the manual in which the Y
> axis goes down and the X axis run to the right. Is there some
> disagreement about that?
I wouldn't say that there is *disagreement* ... but I would say that the
fact that the +Y axis points down was an unfortunate choice.
We have been discussing this on the jmol-users mailing list as a smaller
group prior to bringing it to the broader rasmol list.
I believe that an outsider or newcomer taking a look at this would
naturally assume that the +Y axis points up:
- effectively all 2D graphs have +Y pointing upwards
- 3D graphs in math textbooks have the +Y axis pointing
upwards and the +Z axis coming out of the page
- OpenGL has the +Y axis pointing up
- VRML has the +Y axis pointing up
It is true that most computer windowing systems have the increasing Y axis
going down the page. But in my opinion we should insulate the end-users
from this technical artifact.
Our discussion has been whether Jmol should:
1. maintain RasMol/Chime compatibility and keep +Y
going down
2. drop compatibility and make +Y point up
3. offer a backward-compatibility switch/setting
in order to support both axis orientations.
In general, those who have voiced opinions on jmol-users have advocated
options 2 or 3.
I was more comfortable having the initial discussion on jmol-users with a
smaller group of people. But, we got 'sidetracked' because of confusion
caused by erroneous Y axis labelling in some version of RasWin ...
Miguel
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