> In the course of scripting changes during an animation using a xyz file,
> I would like to insert a monitor line between specific atoms in certain
> models as an animation progresses.

Yes, that makes sense.

> This is desireable because
> animations in which  molecular species move with respect to each other
> may cease to show elongated bonds.

Hmmm ... well I'm not sure that I agree with this usage of monitor.

I think that it is a flaw to confuse 'bonds' with 'distance measurements'.
I realize that this is the way one needed to do it in RasMol, but I
believe that was a design flaw.

Jmol does not render measurements the same way that it renders bonds.
Bonds get drawn from the center of one atom to the next; measurements do
not. Rather, measurements get drawn in front of the atoms involved, so
that the user can see the endpoints and the distance (angle) value.


> These could be designated by a short
> script, such as:
>
> monitor x y
> set monitors off
> set monitors 0.1
>
> Unfortunately, designating the desired models by: select (*/1, *2, *3,
> etc.); does not seem to work.  Curiously, the specified monitor line
> appears only in the last frame (model) of the animation.

True ... this is probably a mistake in Jmol. But, there are some problems
in doing this ... related to backwards compatibility with existing scripts
... but let's save that for another discussion.

> Can anyone
> suggest a method of inserting monitor bonds in specified models of an
> xyz animation?

The correct solution is for us to create a new command that allows one to
explicitly insert bonds under script control.

This will sidestep the issue of how 'monitor' should behave.

I will send a separate email on this topic.

> A second question concerns the color of the monitor line.  The default
> color in Jmol is black,

Actually, the default color of 'measurements' is
black-or-white-contrast-with-existing-background-color.

You are seeing black because you use a white background. If you use a
black background then you see white.

> but the Rasmol manual indicates the color should
> be taken from the end point atoms.

Jmol is not compatible with RasMol in this area.

> I believe this would be preferable,
> since the color monitors command would allow all other choices.

What you want is a bond ... let's create a command that will do that.

I'll send a separate email.


Miguel



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