Bob wrote:
> Anthony,
>
> In actuality, Jmol uses a simple transformation matrix for its internal
> representation of the viewing perspective.
Correct.
> Is your concern that Jmol internally is using an odd convention, or that
> there should be an option for outputting the current rotation of the model
> in other formats?
I agree with Anthony.
To the extent that there is a 'standard' way to perform 3 rotations to
orient in 3-space then we should follow it.
> As far as I know, the only reason we were interested in the Rx*Ry*Rz
> idea is that some would like to be able for the user to rotate the
> model freely,
Agreed.
But it seems that this is the 'correct' way to represent these rotations.
> then set that position using simple chime rotations.
Note that this is the rasmol/chime 'rotate {axis} {degrees}' command, not
the chime 'move' command (which will not work with these numbers).
> In terms of output, the axis angle convention is available in the latest
> beta version as well.
Correct. And it seems to me that this is the 'preferred' way to do it.
> See the "show axisangle" and "moveto" commands, as shown
> in
> http://www.stolaf.edu/people/hansonr/jmol/docs/examples/moveto.htm
>
> Are you saying you'd like to have
>
> show euler
>
> or
>
> show quaternion
>
> along with
>
> show axisangle
>
In the current CVS head, the command changed to 'show orientation'.
This command shows everything that needs to be done to return the molecule
to the current orientation.
It outputs one moveTo command
As an alternate, it also outputs a series of rotate commands (+ zoom +
translate)
This command should output the 'rotate' commands using the euler rotation
x-convention.
Miguel
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