arrowscirclespspicture
Hello i'm trying to get the arrows on the circles
\documentclass{article}
\usepackage{pstricks}
\usepackage{pst-all}
\begin{document}
\begin{pspicture}(-4,-4)(4,4)\grilla
\psaxes[linewidth=1.2pt,labels=none,
ticks=none]{-}(0,0)(-4,-4)(4,4)
\pscircle[linewidth=1.1pt](0,0){1}
\pscircle[linewidth=1.1pt](0,0){2}
\pscircle[linewidth=1.1pt](0,0){3}
\rput[c](4,0.2){$x$}
\rput[c](0.2,3.8){$y$}
\end{pspicture}
\end{document}
As I understand the question, the problem is in the "label" of the arrow and how to do the "circle" with arrows. One way to do this is to play with the properties of chemmove and the arrows.
For example:
\schemestart
\chemfig{First molecule}
\arrow{->[
\chemname[24pt]{\chemfig{N@{st1}ADH}}{\scriptsize \parbox[c]{40pt}{\centering ammonium formate}}
\hspace{0.5cm}
\chemname[24pt]{\chemfig{N@{en1}AD}}{\chemfig{CO_2}}
\chemmove{\draw[->,shorten <=5pt, shorten >=5pt](st1) .. controls +(+50:8mm) and +(+130:8mm)..(en1);}
\chemmove{\draw[->,shorten <=5pt, shorten >=5pt](en1) .. controls +(-130:8mm) and +(-50:8mm)..(st1);}
\chemmove{\draw[->,shorten <=5pt, shorten >=5pt,transform canvas={yshift=-32pt}](st1) .. controls +(+50:8mm) and +(+130:8mm)..(en1);}
]}[,2.4]
\chemfig{second molecule}
\schemestop
Note that maybe further adjusting of the spaces is required.
Your question is not entirely clear (see my comment below question). So far, I guess that you are after something like this:
\documentclass[border=3.141592mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows.meta,
bending,
decorations.markings, decorations.text}
\newlength{\R}\setlength{\R}{2cm}
\begin{document}
\begin{tikzpicture}[
C/.style = {circle, draw,
double,double distance=1mm, % <--- ??
minimum size=#1, align=center},
decoration = {text effects along path, reverse path,
text={\i},
text align=center,
raise=3pt,
},
dot/.style = {circle, fill, minimum size =1mm,
label=#1, node contents={}},
->-/.style = {decoration={markings,
mark=at position 0.8 with {\arrow{Stealth[angle=60:5pt 3]}},
raise=0pt},
postaction={decorate}},
]
\foreach \i/\sa/\ea [count=\j] in {{}/170/90, alpha/10/90, beta/-43/10, gamma/170/317}
{
\path [thin, draw=blue, text=orange, % <--- new
postaction={decorate}, % <--- changed
text effects={text along path}] % <--- new
(\sa:\R) arc (\sa:\ea:\R);
}
\path [->-]
(170:\R) arc (170:317:\R);
\path ( 90:\R) node[dot={$\tau=0$} fm]
( 10:\R) node[dot=right:$\tau \sim 0.6$ fm]
(-43:\R) node[dot=right:$\tau \sim 1$ fm]
(170:\R) node[dot= left:$\tau \sim 2$ fm];
% circle in center
\node[C=21mm] {where\\should I\\be???};
\end{tikzpicture}
\end{document}
Best Answer