[Tex/LaTex] Radial Labels on Mindmap – Part I

mindmapstikz-pgf

How can I modify the orientation of text in the nodes of a mindmap, such that the text is oriented radially from the center in the case of the outermost nodes.

For example, in the below diagram, I seek for the text INSIDE the orange circled nodes to be rotated so that it is in alignment with the direction of the orange lines respectively.

Radial Mindmap

Code for the above mindmap is as follows:

\begin{tikzpicture}
  \path[small mindmap,concept,text=white]
    node[concept] {Bla} [clockwise from=-15]
    child[concept color=red,text=black]{
      node[concept]at(1,0){Bla Bla}[clockwise from=90]
      child[concept color=red!95!black,text=black]{
        node[concept]{A}[clockwise from = 120]
            child {node[concept,scale=0.5] {A.A}}
            child {node[concept,scale=0.5] {A.B}}
            child {node[concept,scale=0.5] {A.C}}
      }
      child[concept color=red!75!black,text=white,grow=50]{
        node[concept]{B}[clockwise from = 80]
            child {node[concept,scale=0.5] {B.A}}
            child {node[concept,scale=0.5] {B.B}}
            child {node[concept,scale=0.5] {B.C}}
      }
      child[concept color=red!50!black,text=white ,grow=10]{
        node[concept]{C}[clockwise from = 40]
            child {node[concept,scale=0.5] {C.A}}
            child {node[concept,scale=0.5] {C.B}}
            child {node[concept,scale=0.5] {C.C}}
      }
      child[concept color=red!25!black,text=white,grow=-30]{
        node[concept]{D}[clockwise from = 0]
            child {node[concept,scale=0.5] {D.A}}
            child {node[concept,scale=0.5] {D.B}}
            child {node[concept,scale=0.5] {D.C}}
      }
      child[concept color=red!10!black,text=white,grow=-70]{
        node[concept]{D}[clockwise from = -40]
            child {node[concept,scale=0.5] {D.A}}
            child {node[concept,scale=0.5] {D.B}}
            child {node[concept,scale=0.5] {D.C}}
      }
    }
    child[concept color=green,text=black, grow=195]{
      node[concept]{Bla Bla}[clockwise from=80]
      child[concept color=green!10!black,text=white]{
        node[concept]{Bla}[counterclockwise from = 50]
            child {node[concept,scale=0.5] {A.A}}
            child {node[concept,scale=0.5] {A.B}}
            child {node[concept,scale=0.5] {A.C}}
      }
      child[concept color=green!25!black,text=white,grow=120]{
        node[concept]{Bla}[counterclockwise from = 90]
            child {node[concept,scale=0.5] {A.A}}
            child {node[concept,scale=0.5] {A.B}}
            child {node[concept,scale=0.5] {A.C}}
      }
      child[concept color=green!50!black,text=white,grow=160]{
        node[concept]{Bla}[counterclockwise from = 130]
            child {node[concept,scale=0.5] {B.A}}
            child {node[concept,scale=0.5] {B.B}}
            child {node[concept,scale=0.5] {B.C}}
      }
      child[concept color=green!75!black,text=white ,grow=200]{
        node[concept]{Bla}[counterclockwise from = 170]
            child {node[concept,scale=0.5] {C.A}}
            child {node[concept,scale=0.5] {C.B}}
            child {node[concept,scale=0.5] {C.C}}
      }
      child[concept color=green!95!black,text=black,grow=240]{
        node[concept]{Bla}[counterclockwise from = 210]
            child {node[concept,scale=0.5] {D.A}}
            child {node[concept,scale=0.5] {D.B}}
            child {node[concept,scale=0.5] {D.C}}
      }
    }
    child[concept color=orange,text=black, grow = -90] {
      node[concept]at(-1.5,-2.5){Bla Bla}[clockwise from=10]
        child[concept color=orange!95!black]{
            node[concept]{Bla}[clockwise from = 40]
                child {node[concept,scale=0.5] {A.A}}
                child {node[concept,scale=0.5] {A.B}}
                child {node[concept,scale=0.5] {A.C}}
        }
        child[concept color=orange!75!black, grow = -30]{
            node[concept]{Bla}[clockwise from =0]
                child {node[concept,scale=0.5] {B.A}}
                child {node[concept,scale=0.5] {B.B}}
                child {node[concept,scale=0.5] {B.C}}
        }
        child[concept color=orange!50!black, text=white, grow=-70]{
            node[concept]{Bla}[clockwise from =-40]
                child {node[concept,scale=0.5] {C.A}}
                child {node[concept,scale=0.5] {C.B}}
                child {node[concept,scale=0.5] {C.C}}
        }
        child[concept color=orange!25!black, text=white, grow=-110]{
            node[concept]{Bla}[clockwise from =-80]
                child {node[concept,scale=0.5] {D.A}}
                child {node[concept,scale=0.5] {D.B}}
                child {node[concept,scale=0.5] {D.C}}
        }
        child[concept color=orange!10!black, text=white, grow=-150]{
            node[concept]{Bla}[clockwise from =-120]
                child {node[concept,scale=0.5] {E.A}}
                child {node[concept,scale=0.5] {E.B}}
                child {node[concept,scale=0.5] {E.C}}
        }
    }    
   ;
\end{tikzpicture}

UPDATE: Continue this topic in Part II, seeking elliptical or rectangular radially rotating nodes.

Best Answer

There are two and a half problems to solve here.

1. The Mathematical Problem

We have to calculate the amount of rotation.

The _^counterclockwise from argument is saved internally in \tikz@grow@circle@from@start.

For every child the amount of /tikz/sibling angle get added (counterclockwise) or subtracted (clockwise). The number of the child is saved in \tikznumberofcurrentchild.

For the orange children which are all placed in a clockwise matter the angle the text must be rotated is:

  \tikz@grow@circle@from@start
- (\pgfkeysvalueof{/tikz/sibling angle}) * (\tikznumberofcurrentchild - 1)

¿zʞıʇ

If a node’s content shouldn’t be upside down the formula has to be adjusted:

(
     \tikz@grow@circle@from@start
     - (\pgfkeysvalueof{/tikz/sibling angle}) * (\tikznumberofcurrentchild - 1)
) + 180 * (
      cos(
            \tikz@grow@circle@from@start
          - (\pgfkeysvalueof{/tikz/sibling angle})+(\tikznumberofcurrentchild-1)
      )
      < 0
)

2. The Rotation Problem

Great, so an easy

rotation =   \tikz@grow@circle@from@start
           - (\pgfkeysvalueof{/tikz/sibling angle}) * (\tikznumberofcurrentchild - 1)

should do, right?

Nope:

enter image description here

The whole node gets transformed (in this case: rotated) which means that all anchor nodes are rotated, too. And this confuses the calculation of the circle connection bar decoration. The more we rotate a child the more the connection bar gets twisted.

We surely could adjust the code for the circle connection bar decoration, but that’s a lot of code!

It would be much easier to just rotate the text itself.
With the help of graphicx’s \rotatebox macro this can be easily done:

\newcommand*{\rotateme}[1]{%
    \pgfmathparse{
        \tikz@grow@circle@from@start-
        (\pgfkeysvalueof{/tikz/sibling angle})*(\tikznumberofcurrentchild-1)
    }%
    \rotatebox[origin=c]{\pgfmathresult}{#1}%
}

2½. The Node Text Problem

Do you want to edit every node that should get rotated and add the \rotateme macro?
I didn’t think so!

My solution collects all the node’s text with the help of

execute at begin node,
execute at and node, and
the lrbox environment which saves the node’s text in a box called \rotatenodebox.

This box is then given to the already-mentioned \rotateme macro.

\tikzset{
    conc3/.style={concept,scale=.5},
    orange/.style={
        conc3,
        execute at begin node={\begingroup\begin{lrbox}{\rotatenodebox}},
        execute at end node={\end{lrbox}\rotateme{\usebox\rotatenodebox}\endgroup},
    }
}

Code

\documentclass[tikz]{standalone}
\usetikzlibrary{mindmap}
\newsavebox\rotatenodebox
\makeatletter
\newcommand*{\rotateme}[1]{%
    \pgfmathparse{
        \tikz@grow@circle@from@start-
        (\pgfkeysvalueof{/tikz/sibling angle})*(\tikznumberofcurrentchild-1)
    }%
    \rotatebox[origin=c]{\pgfmathresult}{#1}%
}
\makeatother

\tikzset{
    conc3/.style={concept,scale=.5},
    orange/.style={
        conc3,
        execute at begin node={\begingroup\begin{lrbox}{\rotatenodebox}},
        execute at end node={\end{lrbox}\rotateme{\usebox\rotatenodebox}\endgroup},
    }
}
\begin{document}
\begin{tikzpicture}
  \path[small mindmap,concept,text=white]
    node[concept] {Bla} [clockwise from=-15]
    child[concept color=red,text=black]{
      node[concept]at(1,0){Bla Bla}[clockwise from=90]
      child[concept color=red!95!black,text=black]{
        node[concept]{A}[clockwise from = 120]
            child {node[conc3] {A.A}}
            child {node[conc3] {A.B}}
            child {node[conc3] {A.C}}
      }
      child[concept color=red!75!black,text=white,grow=50]{
        node[concept]{B}[clockwise from = 80]
            child {node[conc3] {B.A}}
            child {node[conc3] {B.B}}
            child {node[conc3] {B.C}}
      }
      child[concept color=red!50!black,text=white ,grow=10]{
        node[concept]{C}[clockwise from = 40]
            child {node[conc3] {C.A}}
            child {node[conc3] {C.B}}
            child {node[conc3] {C.C}}
      }
      child[concept color=red!25!black,text=white,grow=-30]{
        node[concept]{D}[clockwise from = 0]
            child {node[conc3] {D.A}}
            child {node[conc3] {D.B}}
            child {node[conc3] {D.C}}
      }
      child[concept color=red!10!black,text=white,grow=-70]{
        node[concept]{D}[clockwise from = -40]
            child {node[conc3] {D.A}}
            child {node[conc3] {D.B}}
            child {node[conc3] {D.C}}
      }
    }
    child[concept color=green,text=black, grow=195]{
      node[concept]{Bla Bla}[clockwise from=80]
      child[concept color=green!10!black,text=white]{
        node[concept]{Bla}[counterclockwise from = 50]
            child {node[conc3] {A.A}}
            child {node[conc3] {A.B}}
            child {node[conc3] {A.C}}
      }
      child[concept color=green!25!black,text=white,grow=120]{
        node[concept]{Bla}[counterclockwise from = 90]
            child {node[conc3] {A.A}}
            child {node[conc3] {A.B}}
            child {node[conc3] {A.C}}
      }
      child[concept color=green!50!black,text=white,grow=160]{
        node[concept]{Bla}[counterclockwise from = 130]
            child {node[conc3] {B.A}}
            child {node[conc3] {B.B}}
            child {node[conc3] {B.C}}
      }
      child[concept color=green!75!black,text=white ,grow=200]{
        node[concept]{Bla}[counterclockwise from = 170]
            child {node[conc3] {C.A}}
            child {node[conc3] {C.B}}
            child {node[conc3] {C.C}}
      }
      child[concept color=green!95!black,text=black,grow=240]{
        node[concept]{Bla}[counterclockwise from = 210]
            child {node[conc3] {D.A}}
            child {node[conc3] {D.B}}
            child {node[conc3] {D.C}}
      }
    }
    child[concept color=orange,text=black, grow = -90] {
      node[concept]at(-1.5,-2.5){Bla Bla}[clockwise from=10]
        child[concept color=orange!95!black]{
            node[concept]{Bla}[clockwise from = 40]
                child {node[orange] {A.A}}
                child {node[orange] {A.B}}
                child {node[orange] {A.C}}
        }
        child[concept color=orange!75!black, grow = -30]{
            node[concept]{Bla}[clockwise from =0]
                child {node[orange] {B.A}}
                child {node[orange] {B.B}}
                child {node[orange] {B.C}}
        }
        child[concept color=orange!50!black, text=white, grow=-70]{
            node[concept]{Bla}[clockwise from =-40]
                child {node[orange] {C.A}}
                child {node[orange] {C.B}}
                child {node[orange] {C.C}}
        }
        child[concept color=orange!25!black, text=white, grow=-110]{
            node[concept]{Bla}[clockwise from =-80]
                child {node[orange] {D.A}}
                child {node[orange] {D.B}}
                child {node[orange] {D.C}}
        }
        child[concept color=orange!10!black, text=white, grow=-150]{
            node[concept]{Bla}[clockwise from =-120]
                child {node[orange] {E.A}}
                child {node[orange] {E.B}}
                child {node[orange] {E.C}}
        }
    }
   ;
\end{tikzpicture}
\end{document}

Output

enter image description here

Related Solutions

[Tex/LaTex] Tikz mindmap problems

This is the standard "Unknown Option" error of TikZ. The funny thing is that it does think the whole expression

level 1 concept/.append style={level distance=130,sibling angle=30}

is an option. Normally it should only complain about 'level 1 concept' is unknown, or actually not at all because only a style should be appended - the options should not yet be executed.

The file compiles fine with TikZ/PGF 2.10 with an freshly updated TeXLive 2010, which makes me believe this is an issue with your MikTeX installation.

Here some steps you should try:

Make sure you are running the newest version of MikTeX, i.e. v2.9
Update your package, especially TikZ/PGF, latest version is 2.10.
Make sure that you don't have old TikZ/PGF package files lying around in your local texmf tree (I think C:\localtexmf\ with MikTeX).
(Just an idea) Try to change the order of the options, e.g. put mindmap last, etc..

[Tex/LaTex] Radial Labels on Mindmap – Part II

This answer is similar to what Qrrbrbbirbel did with the node text rotation. But instead of rotating the node text, I modified the edge from parent path such that more information is squeezed in.

The nodes that are needed to be rotated need the mind your rotate key.

First the code and the result,

\documentclass[tikz]{standalone}
\usetikzlibrary{mindmap}
\def\myrotangle{0}
\makeatletter
\tikzset{tikz@concept@setting/.style={edge from parent path={
        (\tikzparentnode) 
        \pgfextra{
        \pgfpointdiff{%}
            \pgfpointanchor{\tikzchildnode}{north}
        }
        {%}
            \pgfpointanchor{\tikzchildnode}{south}
        }
        \pgfmathsetmacro\mychildsize{veclen(\pgf@x,\pgf@y)}
        \pgfpathmoveto{\pgfpointanchor{\tikzchildnode}{center}}
        \pgfset{minimum size=\mychildsize}
        \pgfsetlinewidth{1mm}
        \pgfnode{circle}{center}{}{\tikzchildnode-temp}{\pgfusepath{discard}}
             \pgfpointdiff{%}
                 \pgfpointanchor{\tikzchildnode}{center}
                }
                {%}
                 \pgfpointanchor{\tikzparentnode}{center}
                }
            \pgfmathparse{atan2(\pgf@x,\pgf@y)}%
            \xdef\myrotangle{\pgfmathresult}
            \pgfmathparse{((\myrotangle>90+\pgfkeysvalueof{/tikz/sibling angle})&&(\myrotangle<270+\pgfkeysvalueof{/tikz/sibling angle})?(\myrotangle + 180):(\myrotangle))}
            \xdef\myrotangle{\pgfmathresult}
            }
        to [circle connection bar] (\tikzchildnode-temp)
        }
    }
}

\makeatother


\tikzset{mind your rotate/.style={
    rotate=\myrotangle-\pgfkeysvalueof{/tikz/sibling angle}
    }
}

\begin{document}
\begin{tikzpicture}
  \path[small mindmap,concept,text=white]
    node[concept] (Bla) {Bla} [clockwise from=-15]
    child[concept color=red,text=black]{
      node[concept]at(1,0){Bla Bla}[clockwise from=90]      {}
    }
    child[concept color=green,text=black, grow=195]{
      node[concept]{Bla Bla}[clockwise from=80]
    }
    child[concept color=orange,text=black, grow = -90] {
      node[concept]at(-1.5,-2.5){Bla Bla}[clockwise from=10]
        child[concept color=orange!95!black]{
            node[concept]{Bla}[clockwise from = 40]
                child {node[concept,scale=0.5,mind your rotate] {A.A}}
                child {node[concept,scale=0.5] {A.B}}
                child {node[concept,scale=0.5] {A.C}}
        }
        child[concept color=orange!75!black, grow = -30]{
            node[concept]{Bla}[clockwise from =0]
                child {node[concept,scale=0.5] {B.A}}
                child {node[concept,scale=0.5,mind your rotate] {B.B}}
                child {node[concept,scale=0.5,mind your rotate] {B.C}}
        }
        child[concept color=orange!50!black, text=white, grow=-70]{
            node[concept]{Bla}[clockwise from =-40]
                child {node[concept,scale=0.5] {C.A}}
                child {node[concept,scale=0.5,mind your rotate] {C.B Some important remark that should cause a line break}}
                child {node[concept,scale=0.5,mind your rotate] {C.C}}
        }
        child[concept color=orange!25!black, text=white, grow=-110]{
            node[concept]{Bla}[clockwise from =-80]
                child {node[concept,scale=0.5] {D.A}}
                child {node[concept,scale=0.5,mind your rotate] {D.B Some important remark that should cause a line break}}
                child {node[concept,scale=0.5,mind your rotate] {D.C Some important remark that should cause a line break}}
        }
        child[concept color=orange!10!black, text=white, grow=-150]{
            node[concept]{Bla}[clockwise from =-120]
                child {node[concept,scale=0.5] {E.A}}
                child {node[concept,scale=0.5,mind your rotate] {E.B Some important remark that should cause a line break 
                                                                     and some more text which is tough to come up with 
                                                                     on the fly}}
                child {node[concept,scale=0.5] {E.C}}
        }
    }    
   ;

\draw[yellow] (Bla-3-2-2.north) -- (Bla-3-2-2.south);

\end{tikzpicture}
\end{document}

enter image description here

What is happening in a nutshell is; the regular parent - child node names are caught. Using their coordinates a rotation angle is computed. Also the size of the child is measured(roughly!). Then a temporary non-rotated node is placed on top of the child so that the connection bar doesn't get confused.

There are a few points I've left out;

The size measurement of the child is pretty primitive. No line width, inner sep is taken into account but I think doing it manually leads to smoother connections. (The measured value is shown with yellow line)
The rotation correction code is done directly copy/pasting so it might need another check. I feel that I've left something out but didn't test it extensively.
Overall, I don't think this can work with other node shapes since it would be a really tough code to come up with for the connection transition.

Best Answer

1. The Mathematical Problem

¿zʞıʇ

2. The Rotation Problem

2½. The Node Text Problem

Code

Output

Related Solutions

[Tex/LaTex] Tikz mindmap problems

[Tex/LaTex] Radial Labels on Mindmap – Part II

Related Question