3

I am trying to mimic a ball-and-stick diagram where a molecule is caged in an icosahedron of other molecules. Using tkz-berg I can draw the icosahedron, using code from this SO question. How do I put at vertex (ball) in the middle?

One approach is to draw a vertex and delete the edges. I'm not sure how to do that in tkz-berge.

\usepackage{graphics, tikz, tkz-berge, tkz-graph}
\begin{tikzpicture}
     \begin{scope}[rotate=90]
          \SetVertexNoLabel
          \grIcosahedral[form=1,RA=3,RB=1.5]
          \SetUpEdge[color=white,style={double=black,double distance=2pt}]
          \EdgeInGraphLoop{a}{6}
          \EdgeFromOneToSel{a}{b}{0}{1,5}
          \Edges(a2,b1,b3,b5,a4)
          \Edge(a3)(b3)
          \Edges(a1,b1,b5,a5)
          \Edges(a2,b3,a4)
     \end{scope}
\end{tikzpicture}
2

Command

\grIcosahedral[form=1,RA=3,RB=1.5]

draws two groups of nodes (vertex) distributed around two circles with radius 3 and 1.5 and center at (0,0). I understand that you want to draw a new vertex at origin which is what command \Vertex does by default.

\documentclass[tikz]{standalone}
\usepackage{tikz, tkz-berge, tkz-graph}
\begin{document}
\begin{tikzpicture}
     \begin{scope}[rotate=90]
          \SetVertexNoLabel
          \grIcosahedral[form=1,RA=3,RB=1.5]
          \SetUpEdge[color=white,style={double=black,double distance=2pt}]
          \EdgeInGraphLoop{a}{6}
          \EdgeFromOneToSel{a}{b}{0}{1,5}
          \Edges(a2,b1,b3,b5,a4)
          \Edge(a3)(b3)
          \Edges(a1,b1,b5,a5)
          \Edges(a2,b3,a4)
          \Vertex{C}    %<--- Node named `C` at (0,0)
    \end{scope}
\end{tikzpicture}
\end{document}

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.