> I would be very interested in being able to read
> animations in CML  and I'd like the Jmol community's
> feedback before finalising the details of the format.

Be advised that I have a unique perspective ... since I have never
actually created an animation :-)

> I am using "animate" to describe the visualisation, in a defined
> order, of a number of snapshots of molecular structure. The primary uses
> are conformational transitions, molecular dynamics and chemical reactions.
> Are there others?


It is currently not implemented, but I plan to put in a restriction that
an 'animation' needs to contain the same number and the same elements in
the same order in every model.

Q: Would this type of restriction conflict with any of these applications?

(The only thing I can think of is nuclear reactions ... where the atom
type would change :-)


> In principle one can animate the chemistry (molecular structure) and also
> the visualisation (display styles, visibility, opacity, etc.) Here are
> some
> suggestions and I'd be grateful for what Jmol can do at present and would
> like to do in the future.

The animation in Jmol is based upon distinct 'models'. So one can
basically animate any type of file. Today one can see animated multi-frame
.xyz files and animated animations in multi-model nmr pdb format.

Go to:
  http://www.jmol.org/demo/animation


> I am using molecule, atom and bond as the primary
> objects, though clearly with graphical objects
> (boxes, spheres, etc.) there are other possibilities.
> The display properties are informed by SVG which
> can animate most CSS attributes and several others.
> We have been animating
> reactions using 2D SVG graphics and currently use many off:
>
> graphical object (and text):
>          colour, visibility, position, rotation, opacity
>
> molecule:
>          colour, visibility, position, rotation, opacity, velocity,
> surface
>
> atom
>          colour/style, visibility,  opacity
>          x,y,z
>          velocity
>          elementType (not common, but possible in free energy
> perturbation)
>
> bond
>          existence (important for reactions. We need to be able to insist
> on bond depiction, regardless of covalent radii)
>          display style (transition from solid to dotted, etc.), colour,
> radius, etc.
>          order (double may change to single, etc)
>          position. It may be useful for bonds to "swing" from one part of
> connected atoms to another (represents curly arrows in reactions)
>
> The SVG animations give people a new and often exciting feel about
> chemical
> reactions. If Jmol can do this in 3D it will be incredible. I suspect that
> much of it is already there in some form.

I didn't understand a lot of this.

Let me try to digest it.


Miguel



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