Cfxtrjtrk

I have this code:

% !TeX encoding = UTF-8





documentclass[utf8]{article}

usepackage{tikz}

usetikzlibrary{matrix}

usetikzlibrary{positioning}



newcommand{multilinks}[3]{foreach noeud in {#1} {draw[<-, rounded corners] (#2.west) -| ++(-#3em,0em) |- (noeud.east);}}



begin{document}

    begin{figure}[htp]

        centering

        tikzset{

            basic/.style={draw, rounded corners=2pt, thick, text width=8em, align=flush center, node distance=2em},

        }

        begin{tikzpicture}

            matrix[row sep=2em, column sep=4em, every node/.style={basic}] {

                node(n1){Text}; & node(n3){another text}; \

                node(n2){one thing}; & node(n4){again text}; \

            };

            multilinks{n1,n2}{n3}{3}

            multilinks{n1}{n4}{1}

        end{tikzpicture}

    end{figure}



end{document}

It gives me this result:

As you can see, a curve is weird. How can I fix it?

Here's the result I want:

A slight change in the definition of multilinks and the list #1 in the first multilinks:

documentclass[tikz]{standalone}

usetikzlibrary{matrix,positioning}



newcommand{multilinks}[3]{

    foreach noeud in {#1} {

        draw[<-, rounded corners] (#2.west) -- ++(-#3 em,0em) |- (noeud.east);

    }

}



begin{document}

tikzset{

    basic/.style={

        draw, 

        rounded corners=2pt, 

        thick, 

        text width=8em, 

        align=flush center, 

        node distance=2em

    }

}

begin{tikzpicture}

fontsize{8}{9} selectfont

matrix[row sep=2em, column sep=4em, every node/.style={basic}] {

    node(n1){Text}; & node(n3){another text}; \

    node(n2){one thing}; & node(n4){again text}; \

};

multilinks{n2}{n3}{3}

multilinks{n1}{n4}{1}

end{tikzpicture}



end{document}

Edit

In case you want to keep the original way, the definition of multilinks is a bit more complicated:

documentclass[tikz]{standalone}

usetikzlibrary{matrix,positioning}



newcommand{multilinks}[3]{

    begin{scope}[x=1em,y=1em]

    newdimenxend

    newdimenyend  

    path (#2.west);

    pgfgetlastxy{xend}{yend}

    foreach i in {#1} {

        newdimenxstart

        newdimenystart 

        path (i.east);

        pgfgetlastxy{xstart}{ystart}

        coordinate (1) at ({xend-#3 em},ystart);

        coordinate (2) at ({xend-#3 em},yend);

        ifdimystart=yend

            draw[->] (i.east)--(#2.west);

        else

            draw[->,rounded corners] (i.east)--(1)--(2)--(#2.west);

        fi

    }

    end{scope}

}



begin{document}

tikzset{

    basic/.style={

        draw, 

        rounded corners=2pt, 

        thick, 

        text width=8em, 

        align=flush center, 

        node distance=2em

    }

}

begin{tikzpicture}

fontsize{8}{9} selectfont

matrix[row sep=2em, column sep=4em, every node/.style={basic}] {

    node(n1){Text}; & node(n3){another text}; \

    node(n2){one thing}; & node(n4){again text}; \

};

multilinks{n1,n2}{n3}{3}

multilinks{n1}{n4}{1}

end{tikzpicture}



end{document}

We have to add an ifdim because TikZ is quite confused when it is commanded to draw a rounded corners path from point A to point A (i.e. two identical points):

documentclass[tikz,margin=3mm]{standalone}

begin{document}

begin{tikzpicture}[y=0.2cm]

draw[rounded corners] (0,0) --(1,0) --(1,0)--(2,0) ; % Some bugs?

draw[rounded corners] (0,-1)--(1,-1)--       (2,-1);

draw[rounded corners] (0,-2)--               (2,-2);

end{tikzpicture}

end{document}