对齐思维导图底部节点

Question

如下图所示，Jupiter、PA2AM、VPC三个节点底部没有对齐，如何才能对齐好呢？

\documentclass[tikz]{standalone}

\usetikzlibrary{mindmap, positioning}

\begin{document}
\begin{tikzpicture}[
    root concept/.append style = {concept color = teal!30, sibling angle = 90, font = \LARGE, minimum size = 0pt},
    level 1 concept/.append style = {concept color = teal!30, sibling angle = 90, font = \large},
    level 2 concept/.append style = {concept color = teal!30, sibling angle = 60, font = \large},
  ] 
  \path[mindmap]
    node (spec) [concept, red] {\textsl{Specification}}
    [counterclockwise from = 225]

    child[purple] {
      node[concept] {\textsl{Imple-\\mentation}}
      [counterclockwise from = 240]
      child { node (cjupiter) [concept, font = \large] {Jupiter} }
      child { node (pa2am) [concept, font = \large] {PA2AM} }
    }
    child[violet] {
      node (veri) [concept] {\textsl{Veri-\\fication}}
      [clockwise from = -90]
      child { node (vpc) [concept, font = \large] {VPC} }
    };
\end{tikzpicture}
\end{document}

Answer 1

当然它们不是对齐的：左边两个节点排列成一个圆圈，而右边的节点向下。所有三个子节点都与其父节点共享相同的半径。所以很明显，解决方案是level distance为这三个子节点指定。

这里，我使用level distance=3cm表示左边两个子节点，level distance=2.598cm使用 表示右边一个子节点。这是基本的三角函数：

3cm * cos( -90 - 240 ) = 3cm * 0.866 = 2.598cm

建议（与您的问题无关）：请不要使用手动换行符-\\。\-而是使用 来告诉 TeX 连字点在哪里。

\documentclass[tikz]{standalone}

\usetikzlibrary{mindmap, positioning}

\begin{document}
\begin{tikzpicture}[
    root concept/.append style = {concept color = teal!30, sibling angle = 90, font = \LARGE, minimum size = 0pt},
    level 1 concept/.append style = {concept color = teal!30, sibling angle = 90, font = \large},
    level 2 concept/.append style = {concept color = teal!30, sibling angle = 60, font = \large},
  ] 
  \path[mindmap]
    node (spec) [concept] {\textsl{\color{red}Specification}}
    [counterclockwise from = 225]

    child[purple] {
      node[concept] {\textsl{Imple\-mentation}}
      [counterclockwise from = 240]
      child[level distance=3cm] { node (cjupiter) [concept, font = \large] {Jupiter} }
      child[level distance=3cm] { node (pa2am) [concept, font = \large] {PA2AM} }
    }
    child[violet] {
      node (veri) [concept] {\textsl{Veri\-fication}}
      [clockwise from = -90]
      child[level distance=2.598cm] { node (vpc) [concept, font = \large] {VPC} }
    };
\end{tikzpicture}
\end{document}