Make selection, coloring, mesh and dot styles work on BILD models

[Tom Goddard]

None of the standard operations work on BILD models. I made a single sphere ".sphere 1 2 3 4" and it cannot be selected with the mouse, when selected with "select #1" it does not show a green outline, nor does Model Panel show it is selected, coloring it does nothing, changing the surface style to mesh or dot does nothing.

Francois Berenger wanted to show a BILD sphere using dot display style.

On Nov 21, 2022, at 9:23 PM, Francois Berenger <berenger@edu.k.u-tokyo.ac.jp> wrote:

Dear Elaine,

...

It would be nice if a dot-surfaced sphere is added to the BILD file format.
It would allow to draw spheres with some kind of fake transparency
(i.e. being able to see a sphere inside of another; because they have different
radii and surfacing points).

https://www.cgl.ucsf.edu/chimera/docs/UsersGuide/bild.html

Currently we have:
.sphere x y z r 
Draw a sphere centered at (x, y, z) with radius r. 

So, let's say we add
.dsphere x y z r num_points
Draw a sphere centered at (x, y, z) with radius r and num_points surfacing points.

Here is the almost regular sphere discretizing function that I like:
"Distributing many points on a sphere" Saff, E.B. & Kuijlaars, A.B.J. (1997). The Mathematical Intelligencer, 19, 5-11, http://www.math.vanderbilt.edu/~esaff/texts/161.pdf

Regards,
Francois.