Making a circular/orbit diagram?

Question

How can I make something like this?

Bernard · Accepted Answer

A short code with pst-euclid:
documentclass[svgnames, border=2pt]{standalone}
usepackage{pst-eucl, multido}

begin{document}

begin{pspicture}(-2.2,-2.2)(2.2,2.2)
SpecialCoor
pnode(0,0){O}
pstGeonode[PointSymbol=none, PointNameSep=0pt]%
 (0,2){A}(2,0){B}(0,-2){C}(-2,0){D}
 pnodes{A}(2;85)(2;5)(2;-5)(2;-86)(2;-95)(2;-175)(2;175)(2;93)
psset{nodesepA=1em, arrows=->, arrowinset=0}
multido{ie=0+2,io=1+2}{4}{pstArcnOAB[linewidth=2.5pt]{O}{Aie}{Aio}}
end{pspicture}

end{document}

Sebastiano · Answer

This is your diagram done with xy package (especially to built the commutative diagrams).
documentclass[a4paper,12pt]{article}
usepackage[all,cmtip]{xy}
usepackage{newtxtext,newtxmath}

begin{document}
[xymatrix{
& Aar@/^.9pc/[dr] &  
D ar@/^.9pc/[ur]& & Bar@/^.9pc/[dl]
& Car@/^.9pc/[ul] & }]
end{document}

SebGlav · Answer

EDIT: the bending library
When drawing large lines with arrows, the bending is not respected, unless you use the bending library (doesn't need anything else than declaring it in the preamble). Now this looks like a real circle.

documentclass[tikz,border=3.14mm]{standalone}
usetikzlibrary{bending}

begin{document}
    begin{tikzpicture}
        foreach angle/letter in {90/A,0/B,-90/C,180/D}
            node (letter) at (angle:2) {textbf{sffamily huge letter}};
%       foreach a/b in {A/B,B/C,C/D,D/A}     
%           draw[line width=5pt,-latex] (a) to[bend left,looseness=1] (b);
        defshft{15}
        foreach angle in {0,-90,-180,-270}
            {
            draw[line width=5pt] (-shft+angle:2) arc(-shft+angle:-70+shft+angle:2);  
            draw[line width=5pt,-latex] (-70+shft+angle:2) arc(-70+shft+angle:-90+shft+angle:2);
            }    
    end{tikzpicture}
end{document}

leandriis · Answer

Admittedly a lot more colorful than the image in the question but probably nevertheless useful:
documentclass{article}
usepackage{smartdiagram}
begin{document}
smartdiagram[circular diagram:clockwise]{A, B, C, D}
end{document}

Making a circular/orbit diagram?

4 Answers

EDIT: the `bending` library

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