[Tex/LaTex] Bent paths via relative point from node to node

graphstikz-pgf

I'm trying to draw a network flow diagram in tikz, and am having some problems.

Here is what I have so far:
Current diagram

However I'm having 2 problems with it currently. First of all, for some reason, arrow appear at both ends of my lines if I specify an anchor of my source node. If you look carefully at the picture, you can see some arcs have arrows at both ends. All arcs should be point left to right only.

For example (h1) edge [bend left=15] (1_1) will give an arrow only at the end, as I expect; however (h1.east) edge [bend left=15] (1_1) will put an arrow on both sides.

The second problem is that I need additional arcs that are longer and should avoid the existing arcs and nodes. Like this:

Extra arcs

Here is my code so far:

\begin{tikzpicture}
    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (0,0) (h1);

    \node [circle, draw, inner sep=0.075cm, fill=blue,  fill opacity=0.33, text opacity=1] at (1.5,1.5) (1_1) { 1:1 };
    \node [circle, draw, inner sep=0.075cm, fill=green, fill opacity=0.33, text opacity=1] at (1.5,0) (2_1) { 2:1 };
    \node [circle, draw, inner sep=0.075cm, fill=red,   fill opacity=0.33, text opacity=1] at (1.5,-1.5) (3_1) { 3:1 };

    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (3,0) (h2);

    \node [circle, draw, inner sep=0.075cm, fill=orange, fill opacity=0.33, text opacity=1] at (4.5,0.75) (4_1) { 4:1 };
    \node [circle, draw, inner sep=0.075cm, fill=orange, fill opacity=0.33, text opacity=1] at (6.0,0.75) (4_2) { 4:2 };
    \node [circle, draw, inner sep=0.075cm, fill=purple, fill opacity=0.33, text opacity=1] at (4.5,-0.75) (5_1) { 5:1 };
    \node [circle, draw, inner sep=0.075cm, fill=purple, fill opacity=0.33, text opacity=1] at (6.0,-0.75) (5_2) { 5:2 };

    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (7.5,0) (h3);

    \node [circle, draw, inner sep=0.075cm, fill=teal,  fill opacity=0.33, text opacity=1] at (9.0,0.75) (6_1) { 6:1 };
    \node [circle, draw, inner sep=0.075cm, fill=teal,  fill opacity=0.33, text opacity=1] at (10.5,0.75) (6_2) { 6:2 };
    \node [circle, draw, inner sep=0.075cm, fill=olive, fill opacity=0.33, text opacity=1] at (9.75,-0.75) (7_1) { 7:1 };

    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (12,0)   (h4);
    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (13.5,0) (h5);

    \draw [->] (0.333,-2.5) -- (13.3335,-2.5) node [midway, below] {Time};

    \path [line, ->] (h1) edge [bend left=15] (1_1);
    \path [line, ->] (h1) edge (2_1);
    \path [line, ->] (h1) edge [bend right=15] (3_1);
    \path [line, ->] (1_1) edge [bend left=15] (h2);
    \path [line, ->] (2_1) edge (h2);
    \path [line, ->] (3_1) edge [bend right=15] (h2);
    \path [line, ->] (h2.20) edge [bend left=15] (4_1);
    \path [line, ->] (h2.-20) edge [bend right=15] (5_1);
    \path [line, ->] (4_1) -- (4_2);
    \path [line, ->] (5_1) -- (5_2);
    \path [line, ->] (4_2) edge [bend left=15] (h3.160);
    \path [line, ->] (5_2) edge [bend right=15] (h3.200);
    \path [line, ->] (h3) edge [bend left=15] (6_1);
    \path [line, ->] (h3) edge [bend right=15] (7_1);
    \path [line, ->] (6_1) -- (6_2);
    \path [line, ->] (6_2) edge [bend left=15] (h4);
    \path [line, ->] (7_1) edge [bend right=15] (h4);
    \path [line, ->] (h4) -- (h5);

    \path [line, ->] (h2.60) edge [bend left=60] (4_2.north west);
    \path [line, ->] (h2.-60) edge [bend right=60] (5_2.south west);
    \path [line, ->] (4_1.north east) edge [bend left=60] (h3.120);
    \path [line, ->] (5_1.south east) edge [bend right=60] (h3.240);
    \path [line, ->] (h3.0) edge [bend right=15] (6_2.south west);
    \path [line, ->] (6_1.south east) edge [bend right=15] (h4.180);

    \path [line, ->] (4_1) -- (5_2);
    \path [line, ->] (5_1) -- (4_2);

    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (0.2, 2)  -- (2.8, 2)  node [midway, above, yshift=0.5cm] {Day 1};
    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (3.2, 2)  -- (7.3, 2)  node [midway, above, yshift=0.5cm] {Day 2};
    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (7.7, 2)  -- (11.8, 2) node [midway, above, yshift=0.5cm] {Day 3};
    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (12.2, 2) -- (13.3, 2) node [midway, above, yshift=0.5cm] {Day 4};
\end{tikzpicture}

Best Answer

tikzstyle is deprecated. Use \tikzset instead like

\tikzset{line/.style={-latex'}}

to define a line style. You are also using \path[line, ->] which results in modifying the line style. Use \path[line] instead. To change the extent of bending you can adjust the looseness value with in and out angles like

\path [-latex'] (h1.north) edge [out=90,in=90,bend angle=180,looseness=2](h2.north);

Further, the nodes should have an empty argument {}

\node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (0,0) (h1) {};   %% note the {} at the end

which is missing in your code. Putting all these your code becomes

\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{patterns,arrows,decorations.pathreplacing}
\tikzset{line/.style={-latex'}}
\begin{document}
\begin{tikzpicture}
    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (0,0) (h1) {};

    \node [circle, draw, inner sep=0.075cm, fill=blue,  fill opacity=0.33, text opacity=1] at (1.5,1.5) (1_1) { 1:1 };
    \node [circle, draw, inner sep=0.075cm, fill=green, fill opacity=0.33, text opacity=1] at (1.5,0) (2_1) { 2:1 };
    \node [circle, draw, inner sep=0.075cm, fill=red,   fill opacity=0.33, text opacity=1] at (1.5,-1.5) (3_1) { 3:1 };

    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (3,0) (h2) {};

    \node [circle, draw, inner sep=0.075cm, fill=orange, fill opacity=0.33, text opacity=1] at (4.5,0.75) (4_1) { 4:1 };
    \node [circle, draw, inner sep=0.075cm, fill=orange, fill opacity=0.33, text opacity=1] at (6.0,0.75) (4_2) { 4:2 };
    \node [circle, draw, inner sep=0.075cm, fill=purple, fill opacity=0.33, text opacity=1] at (4.5,-0.75) (5_1) { 5:1 };
    \node [circle, draw, inner sep=0.075cm, fill=purple, fill opacity=0.33, text opacity=1] at (6.0,-0.75) (5_2) { 5:2 };

    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (7.5,0) (h3) {};

    \node [circle, draw, inner sep=0.075cm, fill=teal,  fill opacity=0.33, text opacity=1] at (9.0,0.75) (6_1) { 6:1 };
    \node [circle, draw, inner sep=0.075cm, fill=teal,  fill opacity=0.33, text opacity=1] at (10.5,0.75) (6_2) { 6:2 };
    \node [circle, draw, inner sep=0.075cm, fill=olive, fill opacity=0.33, text opacity=1] at (9.75,-0.75) (7_1) { 7:1 };

    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (12,0)   (h4) {};
    \node [pattern=north east lines, circle, draw, inner sep=0.25cm] at (13.5,0) (h5) {};

    \draw [line] (0.333,-2.5) -- (13.3335,-2.5) node [midway, below] {Time};

    \path [line] (h1) edge [bend left=15] (1_1);
    \path [line] (h1) edge (2_1);
    \path [line] (h1) edge [bend right=15] (3_1);
    \path [line] (1_1) edge [bend left=15] (h2);
    \path [line] (2_1) edge (h2);
    \path [line] (3_1) edge [bend right=15] (h2);
    \path [line] (h2.20) edge [bend left=15] (4_1);
    \path [line] (h2.-20) edge [bend right=15] (5_1);
    \path [line] (4_1) -- (4_2);
    \path [line] (5_1) -- (5_2);
    \path [line] (4_2) edge [bend left=15] (h3.160);
    \path [line] (5_2) edge [bend right=15] (h3.200);
    \path [line] (h3) edge [bend left=15] (6_1);
    \path [line] (h3) edge [bend right=15] (7_1);
    \path [line] (6_1) -- (6_2);
    \path [line] (6_2) edge [bend left=15] (h4);
    \path [line] (7_1) edge [bend right=15] (h4);
    \path [line] (h4) -- (h5);

    \path [line] (h2.60) edge [bend left=60] (4_2.north west);
    \path [line] (h2.-60) edge [bend right=60] (5_2.south west);
    \path [line] (4_1.north east) edge [bend left=60] (h3.120);
    \path [line] (5_1.south east) edge [bend right=60] (h3.240);
    \path [line] (h3.0) edge [bend right=15] (6_2.south west);
    \path [line] (6_1.south east) edge [bend right=15] (h4.180);

    \path [line] (4_1) -- (5_2);
    \path [line] (5_1) -- (4_2);

    %% lines with more bend
    \path [line] (h1.north) edge [out=90,in=90,bend angle=180,looseness=2](h2.north);
    \path [line] (h2.south) edge [out=270,in=270,bend angle=180,looseness=1.3](h3.south);
    \path [line] (h3.70) edge [controls=+(80:2) and +(100:2)](h4.120);    %% just to show another way
    \path [line] (h4.east) edge (h5.west);

    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (0.2, 2)  -- (2.8, 2)  node [midway, above, yshift=0.5cm] {Day 1};
    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (3.2, 2)  -- (7.3, 2)  node [midway, above, yshift=0.5cm] {Day 2};
    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (7.7, 2)  -- (11.8, 2) node [midway, above, yshift=0.5cm] {Day 3};
    \draw [decorate, decoration={brace, amplitude=8pt, raise=8pt}] (12.2, 2) -- (13.3, 2) node [midway, above, yshift=0.5cm] {Day 4};

\end{tikzpicture}
\end{document}

enter image description here

Related Solutions

[Tex/LaTex] Rotate a node but not its content: the case of the ellipse decoration

The source of the difficulty is that ellipses are constructed in a particular way in TikZ. They are paths that start from the x-axis and proceed counter-clockwise around their centre. The vast majority of the time, the exact parametrisation doesn't matter. You appear to have found the one situation where it does!

In the actual question, you only want to be able to mirror the ellipse, and so draw it starting from the negative x-axis (the title of the question suggests a more flexible approach). That's actually not too hard since we can exploit the symmetry of the ellipse. The key is to provide it with a negative x-radius, since then it will start from the negative x-axis (and proceed clockwise, but we could correct for that by negating the y-radius as well). To do this, we interrupt the call from the node shape to the drawing command and flip the sign of the x-radius. The simplest way to do this is to redefine the \pgfpathellipse macro to do the negation and then call the original macro. The following code does this.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{decorations,shapes,decorations.markings}
\makeatletter
\let\origpgfpathellipse=\pgfpathellipse
\def\revpgfpathellipse#1#2#3{%
  #2%
  \pgf@xa=-\pgf@x
  \origpgfpathellipse{#1}{\pgfqpoint{\pgf@xa}{0pt}}{#3}}
\makeatother

\tikzset{
  reversed ellipse/.style={
    ellipse,
    reverse the ellipse%
  },
  reverse the ellipse/.code={
    \let\pgfpathellipse=\revpgfpathellipse
  }
}
\begin{document}
\begin{tikzpicture}
\node[ellipse,
  draw,
  postaction={
    decorate,
    decoration={
      markings,
      mark=at position 1 with {
        \arrow[line width=5pt,blue]{>}
      }
    }
  }
] at (0,0) {hello world};

\node[reversed ellipse,
  draw,
  postaction={
    decorate,
    decoration={
      markings,
      mark=at position 1 with {
        \arrow[line width=5pt,blue]{>}
      }
    }
  }
] at (0,-2) {hello world};
\end{tikzpicture}

\end{document}

Here's the result:

rotated ellipse

(the arrow got clipped, but you can see where it lies)

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Rotate a node but not its content: the case of the ellipse decoration

[Tex/LaTex] How to define the default vertical distance between nodes

Related Question