`isatomvisible` kwarg to allow drawing of carbon atoms?

[SimonEnsemble]

is there a way to not make carbon atoms invisible in the labels?

maybe a kwarg to be added, :make_C_visible for calling this line?
https://github.com/mojaie/MolecularGraph.jl/blob/master/src/draw/draw2d.jl#L90

[mojaie]

Thank you for your idea. Now there is no options to do that now, but easy to implement.
DRAW_SETTING has :display_terminal_carbon field that indicates whether or not only the end of the carbon chain should be labeled (element label + hydrogen number).
Maybe we need more options for that.

The new field would be :display_carbon_label and the values are

• :all: all carbon labels are shown
• :terminal: only terminal carbon (degree=1) are shown
• :none: no carbon labels are shown
  Note that disconnected carbon (i.e. methane) is always shown.

[SimonEnsemble]

that would be fantastic!

I also kindly request to add opacity as an optional argument to the drawatomindex! function with opacity=1.0 default. then pass to setatomnote:
<rect $(bxy) width="$(size)" height="$(size)" rx="$(size/2)" ry="$(size/2)" fill="$(bc)" opacity="$(opacity)" />

think this looks nicer for when the atom indices overlap the bonds.

[SimonEnsemble]

(if you want me to make this PR, let me know...)

[mojaie]

Thank you very much!
Yes, there should beopacity=1.0.
I’d be happy if you make PR for that.